Constant Stress Conditions Research Articles

RESILIENCE RESOURCES OF FUTURE PSYCHOLOGISTS VOLUNTEERING DURING MARTIAL LAW

Abstract: the article is devoted to researching the resources of resilience of future psychologists engaged in volunteer activities in the field of providing psychological assistance to victims of military aggression. The research is focused on studying the level of resilience and coping mechanisms that ensure the ability of future psychologists to adapt in conditions of constant emotional stress. 50 future psychologists aged 18-22 took part in the study, who were divided into two groups depending on the presence or absence of volunteer experience during martial law. It was found that future psychologists who are engaged in volunteer activities mainly rely on cognitive and behavioral coping and do not use emotional coping enough, which may indicate their unwillingness to work with their own emotions.

Potential of growth-promoting bacteria in maize (Zea mays L.) varies according to soil moisture

Climate change has caused irregularities in water distribution, which affect the soil drying-wetting cycle and the development of economically important agricultural crops. Therefore, the use of plant growth-promoting bacteria (PGPB) emerges as an efficient strategy to mitigate negative impacts on crop yield. We hypothesized that the use of PGPB (in consortium or not) had potential to promote maize (Zea mays L.) growth under a soil moisture gradient in both non-sterile and sterile soils. Thirty PGPB strains were characterized for direct plant growth-promotion and drought tolerance induction mechanisms and were used in two independent experiments. Four soil water contents were used to simulate a severe drought (30% of field capacity [FC]), moderate drought (50% of FC), no drought (80% of FC) and, finally, a water gradient comprising the three mentioned soil water contents (80%, 50%, and 30% of FC). Two bacteria strains (BS28–7 Arthrobacter sp. and BS43 Streptomyces alboflavus), in addition to three consortia (BC2, BC4 and BCV) stood out in maize growth performance in experiment 1 and were used in experiment 2. Overall, under moderate drought, inoculation with BS43 surpassed the control treatment in root dry mass and nutrient uptake. Considering the water gradient treatment (80–50–30% of FC), the greatest total biomass was found in the uninoculated treatment when compared to BS28–7, BC2, and BCV. The greatest development of Z. mays L. was only observed under constant water stress conditions in the presence of PGPB. This is the first report that demonstrated the negative effect of individual inoculation of Arthrobacter sp. and the consortium of this strain with Streptomyces alboflavus on the growth of Z. mays L. based on a soil moisture gradient; however, future studies are needed for further validation.

Coal permeability behaviors and non-uniform deformations under various boundary conditions: Part 2 – modelling study

This article is the second part of the series: modelling study. Physical properties of the coal fractures are not equal to those of coal bulk, which lead to non-uniform deformation between coal bulk and fractures in response to gas adsorption and pressure change. In this study, we defined three kinds of non-uniform deformation indexes: adsorptive non-uniform deformation index (ANDI), mechanistic non-uniform deformation index (MNDI), and comprehensive non-uniform deformation index (CNDI) to quantify the degrees of the non-uniform deformations between coal bulk and fractures, and we established a new multi-physical field coupling model based on these non-uniform deformation indexes. The theoretical solutions of the new permeability model agree well with the experimental solutions. The non-uniform deformation is contributed by the gas adsorption and mechanical action, and closely related to the type of boundary conditions. The ratio of the coal bulk modulus to the fracture modulus and the Langmuir pressure constant of matrix controls the MNDI and ANDI, respectively. In addition, in order to explain the fact that part of the theoretical solution of permeability is inconsistent with the experimental solution under constant effective stress condition, we proposed the concept of modified effective stress, which is obtained by adding an additional effective stress based on the traditional effective stress. The additional effective stress reflects the contribution of other factors to effective stress except confining pressure and pore pressure, such as gas adsorption, temperature change, biological decomposition etc. The modified effective stress is the only variable in the new permeability model. The definitions of the additional effective stress and modified effective stress solve the problem that the theoretical solution of permeability is inconsistent with the experimental solution.

Creep cavitation evolution in polycrystalline copper under conditions of stress relaxation

Creep in metals and alloys has been observed and studied extensively over the past century. Most studies are based on constant load or less frequently on constant stress conditions. Under certain stress regimes during the period of service, such as creep-fatigue (cyclic), and under displacement-controlled loading the stress can relax. This paper uses novel millimetre length-scale beam bend geometry test specimens with constant displacement to simulate stress relaxation and explore cavity nucleation and early-stage growth/closure in a model polycrystalline material, namely oxygen-free high-conductivity copper. The role of changing grain size over the range 43 μm–2350 μm has been explored. Power-law creep theoretical modelling and finite element analyses have been adopted to predict creep relaxation and explain cavity nucleation and early-stage growth/closure for the test conditions. The results are compared with the experimental observations. The overall experimental and modelling outcomes are considered with respect to the underlying creep damage mechanism.

Coal permeability behaviors and non-uniform deformations under various boundary conditions: Part 1 – Experimental observations

Permeability is a key parameter to evaluate the ability of coal reservoir for transmitting coalbed methane (CBM). Deformations of internal components of coal caused by the variations of physical fields control the evolution of coal permeability. And there is obvious non-uniform in the deformations of coal bulk and fracture due to the heterogeneity of coal. However, at present, the evolution of non-uniform deformation and its relationship with coal permeability are unclear. In this study, first of a two-part series, we completed a series of experiments to measure the permeability, axial strain, radial strain, overall strain and fracture strain of a coal sample under different boundary conditions (constant confining pressure, constant effective stress and uniaxial strain) at different injection pressures of carbon dioxide (0.2 MPa, 1.0 MPa, 2.0 MPa, 3.0 MPa, 4.0 MPa and 5.0 MPa). And we defined the comprehensive non-uniform deformation index (CNDI) as the ratio of the fracture strain to the overall strain to quantify the degree of the non-uniform deformation between coal bulk and fracture. The experimental results show that the deformation of the coal sample in the longitudinal joint direction is smaller than that in the transverse joint direction, which indicates that the mechanical properties of the coal sample is anisotropic in different directions. And there are obvious differences between the deformations of coal bulk and fractures. When the gas pressure is in the range of 0.2 ∼ 5.0 MPa, the non-uniform deformations are vaguely related to the change of gas pressure, but closely related to the type of boundary conditions. The influence of gas pressure under displacement-controlled boundary condition (uniaxial strain) on the CNDI is greater than that under stress-controlled boundary conditions (constant confining pressure, constant effective stress). In addition, we also observed the phenomenon by the experimental results of the constant effective stress group: the permeability decreases gradually with the gas pressure even after removing the influence of gas slip effect, which is inconsistent with the traditional theoretical solution under the constant effective stress condition. Based on the fact that coal sample is a heterogeneous body, we tentatively believe that one of the reasons for this inconsistency may be that the traditional definition of effective stress does not include the effect of gas adsorption.

Hydraulic and volume change behaviors of compacted highly expansive soil under cyclic wetting and drying

The wide engineered application of compacted expansive soils necessitates understanding their behavior under field conditions. The results of this study demonstrate how seasonal climatic variation and stress and boundary conditions individually or collectively influence the hydraulic and volume change behavior of compacted highly expansive soils. The cyclic wetting and drying (CWD) process was applied for two boundary conditions, i.e. constant stress (CS) and constant volume (CV), and for a wide range of axial stress states. The adopted CWD process affected the hydraulic and volume change behaviors of expansive soils, with the first cycle of wetting and drying being the most effective. The CWD process under CS conditions resulted in shrinkage accumulation and reduction in saturated hydraulic conductivity ( k sat ). On the other hand, CWD under CV conditions caused a reduction of swell pressure while has almost no impact on k sat . An elastic response to CWD was achieved after the third cycle for saturated hydraulic conductivity ( k sat ), the third to fourth cycle for the volume change potential under the CV conditions, and the fourth to fifth cycle for the volume change potential under the CS conditions. Finally, both swell pressure ( σ s ) and saturated hydraulic conductivity ( k sat ) are not fundamental parameters of the expansive soil but rather depend on stress, boundary and wetting conditions.

Bio-Based, Self-Healing, Recyclable, Reconfigurable Multifunctional Polymers with Both One-Way and Two-Way Shape Memory Properties

Shape memory polymers (SMPs) have attracted wide attention over the past few decades due to their fantastic applications in modern life. Nevertheless, excellent self-healing properties, recyclability, solid-state plasticity, and reversible shape-switching ability are necessary but can rarely be satisfied in one material. Herein, we report multifunctional SMPs by constructing a dynamic boronic ester bond cross-linking network using sustainable Eucommia ulmoides gum as a raw material. Thanks to the crystallization and wide melting temperature range, these kinds of SMPs have thermal-triggered one-way shape memory performance and show two-way shape memory properties, whether under constant stress or stress-free conditions. Owing to the dynamic nature of the boronic ester bond, it exhibits good self-healing properties (near 100% at 80 °C), shape reconfigurability, and chemical recyclability. In addition, by incorporating multiwalled carbon nanotubes, the formed composite is responsive to 808 nm near-infrared light. Its applications are further exploited, including photoresponsive actuators, vascular stents, and light-driven switches. This paper provides a simple way for fabricating multifunctional SMPs, and the as-prepared materials have potential applications in diverse fields, such as biomedicine, intelligent sensing, and soft robotics.

Laboratory Setup for Solid-State Battery Pressure Characterization and Control

As high-energy-density solid-state cells approach maturity, battery management systems must be developed to maximize the performance of these cells by monitoring and/or controlling their mechanical stress. This paper describes the design, testing, and control of a lab-scale solid-state battery cell testing system. Solid-state lithium-sulfur cells are characterized under constant volume and constant stress conditions. The testing system also uses axial displacement feedback for mixed volume/stress control and dynamic switching between control modes as a function of state-of-charge and/or charge/discharge conditions.

Gas transport in a binary bentonite mixture used in sealing systems

Binary mixtures composed of 80% of high-density pellets and 20% of granular bentonite at hygroscopic water content are currently considered for use in vertical sealing systems for the deep and longterm disposal of radioactive wastes. By pouring the dry components without compaction, the mixturedisplays a dry density of around 1.49 Mg/m3. However, these sealing systems are subjected to long-term hydrations from the surrounding formations with the possibility of having zones with entrapped and generated gas that makes it challenging to display a homogeneous saturation of the seal. Therefore, gas transport through these bentonite-based sealing materials at different degrees of saturation is a crucial issue. Hence, several oedometer tests have been conducted to evaluate the impact of gas injection on this mixture at different degrees of saturation and constant pouring dry density. These gas injection/dissipation tests were performed at constant vertical stress or constant volume conditions. The results provided the variation of the effective gas permeability at different degrees of saturation and the gas breakthrough pressure aftersaturation. Furthermore, these gas transport results were interpreted with a microstructural study of the mixture focusing on the volumetric filling of the inter-pellet porosity.

Изучение влияния пептидов продуктов пчеловодства на поведение крыс в условиях хронического стресса

Chronic stress is one of the causes of depression. Various daily factors, accumulating, can lead to the formation of a constant state of stress and anxiety. In this study, we measured the ability of peptides of royal jelly, drone brood, and bee honey up to 5 kDa to reduce anxiety under chronic stress conditions in male Wistar rats. To do this, the animals of the control and experimental groups were subjected to random stress factors for 14 days (2 factors per day), while simultaneously receiving 0.9% NaCl solution (control group) or aqueous solutions of the corresponding peptides intranasally at a concentration of 300 μg/kg of body weight (peptides were obtained by a combination of ultrafiltration, ion exchange chromatography and gel-filtration). After 14 days, the level of anxiety in animals of all groups was measured using such behavioral tests as “Open field”, “Forced swimming” and “Light-dark box”. It was found that in the OF test, animals treated with royal jelly and drone brood peptides show shorter freezing time, higher horizontal and vertical locomotor activity, spend more time on research activities and grooming; in the FST animals of the same groups spent more time actively swimming; in the LDB test animals of the same groups spent more time in the illuminated part of the experimental setup and crossed the border between the dark and light parts more times. The results indicate that rats treated with royal jelly and drone brood peptides have lower levels of stress and anxiety compared to animals that received 0.9% NaCl solution (control group) or a solution of bee honey peptides. After conducting behavioral tests, the animals were withdrawn from the experiment and the concentration of corticosterone and ACTH was determined in the blood serum. It was found that there is no any changes in hormone concentrations between rats from control or experimental groups. Probably, the peptides of drone brood and royal jelly have an anxiolytic effect, without affecting the work of the hypothalamic-pituitary-adrenal axis, but acting through intracerebral molecular targets.

Effects of cumin (Cuminum cyminum L.) essential oil and chronic heat stress on growth performance, carcass characteristics, serum biochemistry, antioxidant enzyme activity, and intestinal microbiology in broiler chickens.

This study was conducted on 600 one-day-old male broiler chicks, using a 2 × 6 factorial design (ambient temperature, A x feed additive, F), for a period of 42days. The chicks assigned to different groups were exposed to thermoneutral (TN, 24 ± 1°C) and constant heat stress (HT, 36 ± 1°C) conditions, and were only fed on a basal diet, and a basal diet supplemented with either 100mg/kg chloramphenicol, 50IU/kg α-tocopherol, or 200, 400, and 600mg/kg of cumin essential oil (CEO). The results showed that heat stress adversely affected performance and carcass characteristics, and increased both the mortality rate and footpad lesions. Moreover, constant chronic heat stress showed negative effects on serum biochemistry and the intestinal microbiota, increased antioxidant activity in both the plasma and breast meat, and increased counts of the pathogenic microorganisms in the small intestine. On the other hand, dietary CEO supplementation positively affected these parameters. CEO had a slight effect on performance, carcass characteristics, mortality rate and the incidence of footpad lesions. When compared to the control group, it was determined that CEO generally had a positive effect on lipid peroxidation in the plasma and tissues and decreased antioxidant enzyme activity. Furthermore, CEO positively affected serum biochemistry and counts of beneficial microorganisms in the small intestine.

Shear testing on rock tunnel models under constant normal stress conditions

Large shear deformation problems are frequently encountered in geotechnical engineering. To expose the shear failure mechanism of rock tunnels, compression-shear tests for rock models with circular tunnel were carried out, including single tunnel and adjacent double tunnels. The failure process is recorded by the external video and miniature cameras around the tunnel, accompanied by real-time acoustic emission monitoring. The experiments indicate that the shearing processes of rock tunnel can be divided into four steps: (i) cracks appeared around tunnels, (ii) shear cracks and spalling ejection developed, (iii) floor warping occurred, and (iv) shear cracks ran through the tunnel model. Besides, the roughness of the sheared fracture surface decreased with the increase in normal stress. Corresponding numerical simulation indicates that there are tensile stress concentrations and compressive stress concentrations around the tunnel during the shearing process, while the compressive stress concentration areas are under high risk of failure and the existence of adjacent tunnels will increase the degree of stress concentration.

A New Stress Field Model for Semiclosed Crack under Compression considering the Influence of T -Stress

Compression is a typical stress condition for cracks in deep-water structures, where the cracks tend to close from a nonclosed state, due to a certain gap that exists between the surfaces on both sides of cracks. The stress field models around the crack have been established in previous studies, while the crack surfaces are simply assumed in a nonclosed or full-closed state. In fact, the cracks inside deep-water structures are usually in a semiclosed state, leaving the reliability of calculation results in risk. To reflect the actual state of crack, a comprehensive stress field model around the semiclosed crack is established based on the complex potential theory, and the stress intensity factor K II at the crack tip related to the closure amount of crack surfaces, deep-water pressure, friction coefficient in the closed region, and crack inclination angle is derived. The analytical solution of the stress field around the semiclosed crack contains three T -stress components, i.e., T x , T y , and T x y . The rationality and effectiveness of the proposed stress field model are verified by the isochromatic fringe patterns around the crack obtained from the photoelastic experiment. It reveals that the proposed model can reasonably predict the evolution of the stress field with the closure amount of crack under constant and variable stress conditions.

PRESCHOOL EDUCATION IN UKRAINE: NEW REALITIES AND PERSPECTIVES

This article is devoted to the problem of organizing the educational process in pre-school educational institutions during martial law, the introduction of which in Ukraine has affected all spheres of human life. Changes are in the educational sphere, especially the pre-school one. The author has analyzed the current state of the problems of organization of the educational process, an analysis of the current regulatory documents, characterized the conceptual apparatus of the investigated problems, focusing on the strategies of organization of the educational process in pre-school educational institutions. The relevance and lack of elaboration of these issues is presented.In the war children of preschool age belong to the most vulnerable category of the population. Being in trouble, in a constant state of stress, the child is deprived of normal conditions for development and education. Through the feeling of anxiety, tension, fear, and unrecognizability the process of full socialization of the child is hampered. Children who are forced to be displaced from the zone of active fighting face the problem of social adaptation while staying in a new social environment. The author characterized organizational and methodological principles of pre-school education functioning in the new realities of peculiarities of psychological support of children and parents, paid attention to the key aspects of children’s socialization. The article offers effective solutions for organizing the educational process in children’s homes during military and military time; providing psychological support to children, teachers, and parents; and organizing the educational process. Analyzed the types and channels of communication with participants in the educational process during the state of war resources to ensure the educational process, including distance, mixed and full-time, gave a detailed description. Valuable for the research is the author’s forecast of the priority areas of Ukraine’s preschool education development during the war and post-war period.The material presented in the article is intended for pedagogical workers, scientists, as it contains useful information about the educational process organization in pre-school educational institutions during the war period.

The undrained behaviour of over-consolidated clay subjected to pure rotation of principal stress directions

Foundation soil of offshore structures may be subjected to various non-proportional cyclic loadings, such as wave loading, tide loading and earthquake loading. The consolidation state may affect the undrained behaviour of clay under pure rotation of principal stress directions. A series of cyclic undrained torsional tests were performed on normally and over consolidated clay subjected to pure rotation of principal stress directions at constant deviatoric stress conditions. The effects of over consolidation ratio (OCR) on the excess pore water pressure, stress-strain loop, stiffness and non-coaxial behaviour of the clay were analyzed under different deviatoric stresses and intermediate principal stress coefficients (b values). The results indicate that owing to the pure principal stress rotation alone, strain and excess pore water pressure accumulated in samples and the accumulation is affected by OCRs, deviatoric stress amplitudes and b values. Negative excess pore water pressure and stress dilatancy can be observed in over consolidated clay. Compared with shear stiffness, the normal differential stiffness experiences greater degradation under the pure rotation of principal stress. The shear stiffness of over consolidated clay may show an increase with loading cycles, while the normal differential stiffness degrades at low deviatoric stress value. Over consolidated clay shows non-coaxial behaviour and the greater the OCR values or the smaller the deviatoric stress, the larger the non-coaxial angle. The effects of b values on the non-coaxial behaviour of over consolidated clay are also observed. HIGHLIGHTS Over-consolidated clay subjected to pure rotation of principal stress. The effects of OCR, deviatoric stress and b value were analyzed. Negative EPWP and stress dilatancy were observed in over consolidated clay. The greater the OCR, the larger the non-coaxial angle.

Stress evolution and thickness change of a lithium-ion pouch cell under various cycling conditions

To design large-sized lithium-ion battery modules for the application of electric vehicles and grid-level energy storage, it is of important significance to understand how stress and dimension of a single pouch cell fluctuate during charge/discharge cycles. In this study, stress evolution under the constant-thickness condition and thickness change under the constant-stress condition are measured for in-house fabricated pouch cells, respectively. The results of stress measurements show that the stress increase percentage generally decreases when the charge/discharge current increases, regardless of the value of the initial compressive stress. With the same current density, the stress increase percentage generally increases when the upper cutoff voltage increases. With the same current density and upper cutoff voltage, the stress increase percentage decreases when the initial compressive stress increases. The results of thickness measurements show that the volume expansion percentage generally increases when the current density increases, regardless of the value of the constant compressive stress. With the same current density, the volume expansion percentage generally increases when the upper cutoff voltage increases. With the same current density and upper cutoff voltage, the volume expansion decreases when the constant compressive stress increases. The results provide important insights into the design principles of battery packs.

Quasi in-situ analysis of compressive creep behaviors and microstructure evolutions in Al–Zr alloys with Sc and Er additions

Al–Zr series alloy wires are not in a state of constant temperature and stress during service, thus the compressive stress and aging effects on the creep response in a changing state should be clarified. In this study, the quasi in-situ compressive creep behaviors and microstructure evolutions of Al–Zr alloys with Sc and Er additions have been studied. It is found that CCA curves of Al–Zr alloy were severely deformed at 120 °C for 40 h/90 MPa, for Al–Zr–Er alloy, the CCA curves sharply increased at 150 °C for 40 h/90 MPa, and that of Al–Zr-Sc alloy always kept stable at different stages. Moreover, different creep mechanisms were found in these alloys. After different CCA stages, the fibrous grains are always existing in the Al–Zr-Sc alloy, while equiaxed grains appear in the Al–Zr and Al–Zr–Er alloys, indicating the better compressive creep resistance with Sc additions. Discontinuous dynamic recrystallization (DDRX) is the dominant nucleation mechanism in the three alloys, and secondary dynamic recrystallization (SDRX) is the subordinate nucleation mechanism for the Al–Zr and Al–Zr–Er alloys. Additionally, Sc rich precipitation makes the stacking energy and lattice strain field obviously fluctuate and promotes the effective diffusion and storage of dislocations with Lomer–Cottrell locks, therefore, the compressive creep resistance of the material is improved.

Modern problems of formation of women’s motivation to work in health and recreation movement activities under quarantine restrictions

The article is devoted to the substantiation of a set of measures to form the motivation of women to engage in health and recreational physical activity in the conditions of quarantine restrictions. The pandemic in Ukraine has actually reached its peak. For a long time, the population is in a state of constant stress due to the risk of illness, inability to return to the usual rhythm of life, a certain complex of psychological fatigue, formed effective forms of dissemination of information. The purpose of the study is to theoretically substantiate and develop a set of activities that will help increase the level of motivation of women to engage in health and recreational physical activity in conditions of quarantine restrictions. Research methodology - analysis and generalization of special scientific and methodological literature, documentary materials, sociological (questionnaire, expert survey), pedagogical research methods (pedagogical observation, pedagogical experiment), methods of mathematical statistics. Scientific novelty: rhe study of women's motivation to engage in health and recreational physical activity in conditions of quarantine restrictions is relevant. How to motivate women to exercise is an important question today. Successful realization of motivation and goals stimulated the desire of women to continue to show initiative, that is, intrinsic motivation and interest. Conclusions: the proposed program of classes includes 4 sets of activities: setting smart goals, rational use of free time, control of success and promotion, fitness that you like. The variety of means of the offered program allowed to involve women in occupations of improving and recreational physical activity and to promote formation of the positive attitude to a healthy way of life and physical activity.

Pension provision in the system of social protection of the population

A large number of works in the scientific literature are devoted to the study of pensions in the social protection system, because today the issue of providing social guarantees to the population is very painful. Today's pension system in Ukraine operates in conditions of constant financial stress, instability and requires constant improvement as it is unable to provide citizens with a decent standard of living and therefore needs to be reviewed and reformed. Reforming socio-economic processes necessitates comprehensive public administration of reforms in the pension system by improving organizational and economic mechanisms.
 Pension provision is an important component of Ukraine's economic system. Pension rights are one of the basic social rights guaranteed by the Constitution of Ukraine and the laws of Ukraine, which are not only proclaimed or declared, but also implemented and apply to everyone.
 State-funded pension benefits are important factors in determining the living standards and well-being of the poorest and are designed to prevent poverty, meet basic needs and maintain a normal standard of living after losing one's job.
 The article considers the functioning of the pension system in Ukraine, namely, the need and composition of pensions, evolutionary processes, economic nature, as well as sources of formation of the Pension Fund and the use of funds. The need to amend the legislation of Ukraine to reform the pension system in Ukraine has been identified.
 Scholars' views on the interpretation of the concept of "pension provision" and "social protection system" are systematized. Particular attention is paid to the study of the constituent elements of the social protection system, which includes: social assistance, social security, social insurance. The three-level pension system in the context of the components of social protection subsystems is also studied.

Flexible PBAT-Based Composite Filaments for Tunable FDM 3D Printing.

Biobased composites with peculiar properties offer an attractive route for producing environmentally friendly materials. The reinforcement for poly(butylene adipate-co-terephthalate) (PBAT), based on zein-titanium dioxide (TiO2) complex (ZTC) microparticles, is presented and used to produce composite filaments, successfully 3-dimensionally (3D) printed by fused deposition modeling (FDM). The outcome of ZTC addition, ranging from 5 to 40 wt %, on the thermo-mechanical properties of composite materials was analyzed. Results reveal that storage modulus increased with increasing the ZTC content, leading to a slight increase in the glass transition temperature. The creep compliance varies with the ZTC concentration, denoting a better resistance to deformation under constant stress conditions for composites with higher complex content. Scanning electron microscopy was used to assess the quality of interphase adhesion between PBAT and ZTC, showing good dispersion and distribution of complex microparticles in the polymer matrix. Infrared spectroscopy confirmed the formation of a valid interface due to the formation of hydrogen bonds between filler and polymer matrix. Preliminary tests on the biocompatibility of these materials were also performed, showing no cytotoxic effects on cell viability. Finally, the 3D printability of biobased composites was demonstrated by realizing complex structures with a commercial FDM printer.