Synthetic Leather Research Articles

Releases of microplastics and chemicals from nonwoven polyester fabric-based polyurethane synthetic leather by photoaging

The nonwoven PET fabrics are chemically, mechanically and thermally treated fiber aggregate without weaving, knitting or braiding, which could be used as a base to make polyurethane (PU) synthetic leather through a series of processing. Our research systematically compared the photoaging behaviors of pure non-woven PET base fabric (NPET-P) and PU synthetic leather (nonwoven PET-base fabrics with PU coating, NPET-U), and their possibilities for microplastic fibers (MPFs) generation and chemical transformation in water. NPET-U was photoaged to a higher oxidation degree with higher O/C ratios and more distinct changes in chemical structures. The amount of MPFs released from NPET-U (1.98 × 107 g/fibers) was significantly lower than that from NPET-P (4.76 × 107 g/fibers) after 360 h light irradiation (p value <0.05) with a slower degradation rate and delayed MPFs release. The lengths and diameters of released MPFs from NPET-U varied within a smaller range than that from NPET-P exposed to UV light irradiation. Natural sunlight aging of fabrics for 365 days was found to be equivalent to approximately 85.3–127.2 h UV aging in the laboratory, which indicated the lab accelerated experiments was extraordinarily intense to simulate natural sunlight aging. Furthermore, abundant calcium and sulfur-contained chemicals were detected in original fabrics and the leachate of 360 h light-aged fabrics using the inductively coupled plasma optical emission spectrometer (ICP-OES). The organic components of the leachate were separated according to their molecular weight with the changes of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and the UV response over aging time. UV stimulation aggravated the role of plastic polymers as disinfection by-product (DBP) precursors. Nevertheless, although NPET-U could produce more nitrogen-contained chemicals, it had similar formation potentials of nitrogen-containing DBPs as NPET-P. The discussion lucubrated the potential risks of the production of MPFs and chemical release in the leachate with regard to combined plastic pollution.

High Efficiency of Formaldehyde Removal and Anti-bacterial Capability Realized by a Multi-Scale Micro-Nano Channel Structure in Hybrid Hydrogel Coating Cross-Linked on Microfiber-Based Polyurethane.

Inspired by the transpiration in the tree stem having a vertical and porous channel structure, high efficiency of formaldehyde removal is realized by the multi-scale micro-nano channel structure in a hybrid P(AAm/DA)-Ag/MgO hydrogel coating cross-linked on microfiber-based polyurethane. The present multi-scale channel structure is formed by a joint effect of directional freezing and redox polymerization as well as nanoparticles-induced porosity. Due to the large number of vertically aligned channels of micrometer size and an embedded porous structure of nanometer size, the specific surface area is significantly increased. Therefore, formaldehyde from solution can be rapidly adsorbed by the amine group in the hydrogels and efficiently degraded by the Ag/MgO nanoparticles. By only immersing in formaldehyde solution (0.2 mg mL-1) for 12 h, 83.8% formaldehyde is removed by the hybrid hydrogels with a multi-scale channel structure, which is 60.8% faster than that observed in hydrogels without any channel structure. After cross-linking the hybrid hydrogels with a multi-scale channel structure to microfiber-based polyurethane and exposing to the formaldehyde vapor atmosphere, 79.2% formaldehyde is removed in 12 h, which is again 11.2% higher than that observed in hydrogels without any channel structure. Unlike the traditional approaches to remove formaldehyde by the light catalyst, no external conditions are required in our present hybrid hydrogel coating, which is very suitable for indoor use. In addition, due to the formation of free radicals by the Ag/MgO nanoparticles, the cross-linked hybrid hydrogel coating on polyurethane synthetic leather also shows good anti-bacterial capability. 99.99% of Staphylococcus aureus can be killed on the surface. Based on the good ability to remove formaldehyde and to kill bacteria, the obtained microfiber-based polyurethane cross-linked with a hybrid hydrogel coating containing a multi-scale channel structure can be used in a broad field of applications, such as furniture and car interior parts, to simultaneously solve the indoor air pollution and hygiene problems.

Dayak Tribe Talawang Motif as a Variety of Bridal Fashion Decoration with Laser Cutting Technique

Talawang is a traditional shield belonging to the Dayak tribe. This research aimed to describe the results of the finished Talawang motif as a wedding dress decoration. The method used a double diamond consisting of 4 stages: discover, define, develop, and deliver. The results of applying the Talawang motif on bridal clothing were analyzed descriptively using the FEA (function, aesthetic, expressive) model. The laser cutting technology could detail the Talawang motif as a modern wedding dress decoration. Making the Talawang motif of the Dayak tribe uses a particular machine for laser cutting using synthetic leather. The bride's clothing follows the design concept using a mermaid silhouette, applying the Talawang motif on the dress and part of the sleeves. The finished men's clothing is under the design concept using a classic formal dress silhouette in a suit consisting of a shirt, vest, trousers, and coat, applying the Talawang motif on the right side of the suit's body. Based on the analysis of the function of the clothing created is a wedding dress, while in terms of aesthetics by applying decorations in the form of stylized Talawang motif with laser cutting techniques. This wedding dress expresses the uniqueness and beauty of the Talawang motif, expressing a modern wedding dress with a touch of local cultural values.

Low‐water‐solublereactive dyes for application in ultrafine polyamide/polyurethane synthetic leather

AbstractUltrafine polyamide/polyurethane synthetic leather (UP/PSL), with a highly natural leather‐like appearance and touch, is widely used in many leather commodities. Generally, acid dyes, which are mostly used for dyeing UP/PSL, exhibit poor colour fastness. While, reactive dyes are well‐known for their good colour fastness. However, reactive dyes are not used to dye UP/PSL because they are water‐soluble and cannot stain the polyurethane (PU) in UP/PSL. In this study, five low water‐soluble reactive dyes with good affinity for both polyamide (PA) and PU were synthesised and characterised using ultraviolet‐visible and infrared spectroscopy, and mass spectrometry. All low‐water‐soluble reactive dyes were monoazo dyes with only one sulfonic group and two different functional groups. The reactive dyes were used to dye UP/PSL at 98°C and fixed at 90°C with 7‐azatridecane‐1,13‐diamine as a crosslinking agent. For comparison, Eriofast Red‐2B (ER‐2B) was used to dye UP/PSL using a special dyeing procedure. ER‐2B showed severe issues related to low utilisation and uneven dyeing, whereas the five low water‐soluble reactive dyes exhibited better performance than ER‐2B. Both the exhaustion and fixation of dyes 1 and 4 exceeded 90.0% when the dosage was less than 3.0% owf (on weight of fabric). In addition, they exhibited good levelling. The washing fastness of the five reactive dyes was excellent and higher than grade 4. The dry rubbing fastness was higher than grade 3‐4. Therefore, UP/PSL can be satisfactorily dyed using the reactive dyes with a solubility of less than 1.0 g/L and meet the requirements of daily life applications.

RECYCLING OF WASTE FROM POLYVINYL CHLORIDE MATERIAL PRODUCTION BY HIGH-TEMPERATURE SHEAR DEFORMATION

Recycling of recycled polymer raw materials, in particular PVC waste, is undoubtedly one of the key components of the modern world. A significant place among PVC-based waste is occupied by linoleum, foam, laminated wallpaper, sanitary PVC pipes, artificial leather for haberdashery and technical purposes, agricultural and insulating films, PVC hoses, containers, used packaging. Currently, there are no effective ways to recycle them, so most of the waste is disposed or incinerated.This article shows the possibility of using dispersed powder materials obtained by high-temperature shear grinding of waste from the production of polyvinyl chloride materials. The design of a rotary dispersant for carrying out the process of high-temperature shear grinding of polymer products is considered.It has been established that in the process of waste PVC material recycling simultaneously with the process of high-temperature shear grinding, it is possible to modify the polymer material by introducing 1–3 wt. fr. of metal-containing heat stabilizers and 10–30 wt. fr. of plasticizers into the feedstock. This leads to an increase in the thermal stability margin by 15–50 min and an improvement in the flow rate of the melt processed together with ester plasticizers of the material by 20–35 %, as well as an improvement in the manufacturability of the dispersion process.The conducted research suggests an economically and environmentally beneficial possibility of recycling polyvinyl chloride materials, and opens up ways to create technological schemes closed in material and energy flows.

SYNTHESIS AND PROPERTIES OF THE METHYL ESTERS OF 3,5-DI-METHYLCYCLOALKYL-4-HYDROXYPHENYLPROPIONIC ACID

A study was carried out and a method was developed for the synthesis of sterically hindered phenols by cycloalkylation of methyl ester of 4-hydroxyphenylpropionic acid with 1-methylcyclopentene, 1- and 3-methylcyclohexene in the presence of a KU-23 catalyst (modification 10/60 (GOST 20298)) with a pore radius of 250-600 Å. The optimal conditions for cycloalkylation of methyl ester of 4-hydroxyphenylpropionic acid with methylcyclenes in the presence of a KU-23 catalyst (temperature 100-110 ºС, reaction time 5-6 h, molar ratio of ether to cyclene 1:2, amount of catalyst 10% per taken ester) were determined. At these conditions, the highest values of yields and selectivity of the target product are achieved. The yields of the target products were 69.8-72.5% of the theory for the taken ester and the selectivity was 89.6-94.3% for the target product. The chemical structures of the synthesized methyl esters of 3,5-di-cycloalkyl-4-hydroxyphenylpropionic acid were confirmed by spectral methods of analysis, the purity and fractional composition – by chromatographic methods of analysis. For the compounds the physicochemical parameters, molecular weight were determined and elemental analysis was carried out. For the processes of catalytic cycloalkylation of methyl ester of 4-hydroxyphenylpropionic acid with methylcyclenes the material balance was calculated and compiled. The synthesized methyl esters of 3,5-dicycloalkyl-4-hydroxyphenylpropionic acid were tested as stabilizers for the polyurethane polymer. Esters were added during the synthesis of a polyurethane polymer. Then the membrane were prepared from a mixture of polymer and ester. These membranes were subjected to light and heat aging at a temperature of 150 °C for 6 h, UV irradiation for 40 h. Based on the tests carried out, it was found that methyl ester of 3,5-di-(1-methylcyclohexyl)-4-hydroxyphenylpropionic acid can be recommended for use as a heat stabilizer for polyurethane polymer and face coverings for artificial leather based on it. For citation: Naghiyeva M.V., Rasulov Ch.K. Synthesis and properties of the methyl esters of 3,5-dimethylcycloalkyl-4-hydroxyphenylpropionic acid. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2023. V. 66. N 6. P. 85-93. DOI: 10.6060/ivkkt.20236606.6777.

Material Circularity: A Novel Method for Biobased Carbon Quantification of Leather, Artificial Leather, and Trendy Alternatives

In the past, climate change led the United Nations to define the Sustainable Development Goals Statement “blueprint to achieve a better and more sustainable future” and the European Commission to promote the “bioeconomy” concept and to launch the Green Deal Policy. Accordingly, the COP26 conference proposed a drastic reduction of fossil-based fuels and materials, in favor of biobased materials which should ensure intrinsic carbon neutrality. Contextually, many startups and established materials suppliers proposed new, trendy materials claiming sustainability advantages but, in many cases, without robust scientific backing. The need for transparency in terms of circularity led us to exploit a fast, reliable and easily deployable analytical method for assessing the biogenic carbon fraction in a variety of industrial materials. Our research team identified a radiocarbon analysis based on Saturated-absorption CAvity Ring-down (SCAR) spectroscopy as a quick and effective method for such a scope. Here we demonstrate its use for the determination of biogenic/fossil carbon proportions of polymeric and coated materials such as leather, coated textiles and trendy alternatives used in the fashion industry, with the scope of defining their intrinsic renewable content. The reliability of the SCAR method is validated through a comparison with the results obtained by the benchmark technique.

Creation of new textile utilizing Nishijin’s hikibaku technique and exploring new applications in other industries

Nishijin is famous for its traditional technique of cutting Japanese paper to a thickness of 0.2 to 0.3 mm and weaving it with warp and weft threads. This technique is called ‘ hikibaku’. In the previous paper, we reported on the creation of a new textile with a new tactile feeling by using natural cowhide instead of Japanese paper used in hikibaku. In this paper, we describe the details of the automation of the hikibaku technique that created the new textile, and conduct a durability test of the newly produced textile using artificial leather, which is of stable quality, instead of natural cowhide, and discuss its new applications.

Influence of the content of recycled artificial leather waste particles in particleboards on their selected properties

Influence of the content of recycled artificial leather waste particles in particleboards on their selected properties. Artificial leather is a layered fabric-plastic composite that resembles natural leather in appearance. Due to its wide range of advantages, artificial leather is widely used as an upholstery material in the renovation and production of furniture or even car upholstery. The aim of the research was to manage upholstery leather waste by adding previously shredded particles of artificial leather of different contents (5, 10, 25 and 50% by weight) to particleboard. Tests of selected mechanical properties (bending strength and modulus of elasticity and resistance to screw withdrawal) and physical properties (density profile, thickness swelling after immersion in water) were completed. It can be concluded that, depending on the further use of the board, there is a possibility of using the recovered artificial leather particles as a reasonable addition to wood fibres in the production of particleboard.

Preparation and properties of multifunctional polyurethane synthetic leather nanocomposites

Although leather can be functionally modified well, its origin will cause concern about the destruction of the ecological environment. Here, a novel multifunctional synthetic leather (denoted as FRTL) that integrates high tensile strength, flame retardancy, Joule heating, electromagnetic shielding, and strain sensing is reported. Benefiting from the excellent mechanical properties of the PU film, the leather exhibits a high tensile strength of 100.8 MPa. Based on the high conductivity of MXene, the leather possesses an electromagnetic shielding efficiency of 30.1 dB. FRTL also exhibits excellent flame retardancy, confirmed by the reduction of more than 32% in peak heat release rate. In addition, the controlled Joule heating properties enable the leather to cope with extreme cold weather. The obtained fabric can also detect various human movements. This work provides a facile method to fabricate the next-generation multifunctional protective leather, showing promising application in the field of smart firefighting.

Separation of Leather, Synthetic Leather and Polymers Using Handheld Laser-Induced Breakdown Spectroscopy.

Genuine leather is produced from animal skin by chemical tanning using chemical or vegetable agents, while synthetic leather is a combination of fabric and polymer. The replacement of natural leather by synthetic leather is becoming more difficult to identify. In this work, Laser Induced Breakdown Spectroscopy (LIBS) is evaluated to separate between very similar materials: leather, synthetic leather, and polymers. LIBS is now widely employed to provide a specific fingerprint from the different materials. Animal leathers processed with vegetable, chromium, or titanium tanning were analyzed together with polymers and synthetic leather from different origins. The spectra exhibited typical signatures from the tanning agents (Cr, Ti, Al) and the dyes and pigments, but also from polymer characteristic bands. The principal factor analysis allowed to discriminate between four main groups of samples representing the tanning processes and the polymer or synthetic leather character.

STUDY OF THE INFLUENCE OF LOW TEMPERATURES ON MATERIALS WITH A SPECIAL PURPOSE POLYMER COATING UNDER STATIC CONDITIONS

The domestic chemical industry urgently needs the creation of special high-class protective clothing that would allow working in extreme conditions without endangering the life and health of employees. In previous publications, it was determined that the necessary comprehensive protection against the effects of harmful production factors is provided by the creation and use of an insulating suit, which should become a barrier that prevents the penetration, and therefore the influence of mineral acids, alkalis. , ammonia, salt solutions, etc. of different concentrations. That is, it is about the creation of special clothing with the required level of protection and preservation of such basic protective indicators as chemical resistance and impermeability of the material while preserving the tightness of the product as a whole. Equipment for preparation and locksmiths for cleaning closed containers for transportation and storage of aggressive environments can simultaneously be exposed not only to mineral acids, alkalis, salt solutions based on them, but also to the remains of liquid ammonia, the evaporation of which occurs when temperatures drop, which leads to primary destruction polymer coating materials for special suits. For example, local destruction in contact with liquid ammonia leads to a sharp cooling (up to – 340C) of the contact surface of the material and destruction of the polymer coating, especially during operation (in dynamics), which can lead to a violation of the tightness of the protective product. Since workers have to perform a significant number of work movements while wearing an insulating suit, there was a need to investigate such an indicator as the resistance of materials to both dynamic loads and static conditions at low temperature. The research was conducted on samples of materials with a polymer coating, which belong to the class of special purpose artificial leathers of both foreign and domestic manufacturers.

STUDY OF THE INFLUENCE OF LOW TEMPERATURES ON MATERIALS WITH A SPECIAL PURPOSE POLYMER COATING UNDER STATIC CONDITIONS

The domestic chemical industry urgently needs the creation of special high-class protective clothing that would allow working in extreme conditions without endangering the life and health of employees. In previous publications, it was determined that the necessary comprehensive protection against the effects of harmful production factors is provided by the creation and use of an insulating suit, which should become a barrier that prevents the penetration, and therefore the influence of mineral acids, alkalis, ammonia, salt solutions, etc. of different concentrations. That is, it is about the creation of special clothing with the required level of protection and preservation of such basic protective indicators as chemical resistance and impermeability of the material while preserving the tightness of the product as a whole. Equipment for preparation and locksmiths for cleaning closed containers for transportation and storage of aggressive environments can simultaneously be exposed not only to mineral acids, alkalis, salt solutions based on them, but also to the remains of liquid ammonia, the evaporation of which occurs when temperatures drop, which leads to primary destruction polymer coating materials for special suits. For example, local destruction in contact with liquid ammonia leads to a sharp cooling (up to – 340C) of the contact surface of the material and destruction of the polymer coating, especially during operation (in dynamics), which can lead to a violation of the tightness of the protective product. Since workers have to perform a significant number of work movements while wearing an insulating suit, there was a need to investigate such an indicator as the resistance of materials to both dynamic loads and static conditions at low temperature. The research was conducted on samples of materials with a polymer coating, which belong to the class of special purpose artificial leathers of both foreign and domestic manufacturers.

Investigation of the Penetration Force of Disposable Sterile Needles through Biomedical Textile Surfaces

Disposable sterile needles are essential highly consumed medical tools. Medical needles are usually manufactured according to standardized protocols, which currently do not provide the specified minimum tolerance value of the penetration force which strongly depends on needle dimensions, needle cutting edge angle, and the type of the tissue surface to be penetrated. In the present study, experimental measurements were performed according to the ISO 7864 standard to investigate the needle-surface penetration effect via the experimental assessment of the influence of the needle dimensions, cutting edge angle, and three different types of biomedical textiles/artificial tissues (i.e. polyurethane (PU), polypropylene (PP), and artificial leather (AL)) on the penetration force. The results indicate that the smaller the needle's cutting-edge angle, the smaller the penetration force across the target tissue surface. An exponential decaying relationship has been found between the penetration force and the needle diameter/gauge. The results also show that PP provides similar results to other materials that are already included in ISO 7864, and it has a good potential to be accepted as a standardized biomedical textile.

PENGARUH PENGGUNAAN HAND MIXER DAN OVERHEAD MIXER PADA UNJUK KERJA PENCAMPURAN DALAM PEMBUATAN KULIT SINTETIS

The mixing process is necessary for the manufacture of a product, one of which is the manufacturing process of artificial leather. The mixing process in the manufacture of artificial leather aims to mix raw materials and additives such as fillers, stabilizers, plasticizers, and others. The mixing process is carried out using a mixer. This study aims to determine the effect of using mixers that have different specifications. The mixer used is the Hand Mixer Miyako SM-625 with the Overhead Mixer IK RW 20. Both of these mixers have differences in speed and type of agitator.From the results of organoleptic test, both of these mixers there was no difference. But the results of the physical test showed that the values of tensile strength, elongation, and tear strength were higher when using the IK RW 20 Overhead Mixer. This indicated that both mixers could be used in the manufacture of artificial leather, but to obtain measurable test results, using the IK RW 20 Overhead Mixer was recommended, seen from the difference in each of the physical test parameters.

Formation of Nano- and Microplastics and Dissolved Chemicals During Photodegradation of Polyester Base Fabrics with Polyurethane Coating.

Polyurethane (PU) synthetic leathers possess an intricate plastic composition, including polyester (PET) base fabrics and upper PU resin, but the release of fragments from the complexes is unclear. Therefore, we investigated the photodegradation trends of PET base fabrics with PU coating (PET-U) as a representative of composite plastics. Attention was paid to the comparison of the photoaging process of PET-U with that of pure PET base fabric (PET-P). To reveal the potential for chain scission, physical and chemical changes (e.g., surface morphology, molecular weight, and crystallinity) of the two fabrics were explored. The generation of microplastic fibers (MPFs) and microplastic particles (MPPs) was distinguished. Compared with PET-P, PET-U showed a similar but delayed trend in various characteristics and debris release rate as the photoaging time prolonged. Even so, after 360 h of illumination, the generated number of MPs (including MPFs and MPPs) rose considerably to 9.32 × 107 MPs/g, and the amount of released nanoplastics (NPs) increased to 2.70 × 1011 NPs/g from PET-U. The suppression of MP formation from PET-U was potentially directed by the physical shielding of the upper PU layer and the dropped MPs, which resisted the photochemical radical effect. The components of dissolved organic matter derived from plastics (P-DOM) were separated by molecular weight using a size-exclusion chromatography-diode array detector-organic carbon detector/organic nitrogen detector (SEC-DAD-OCD/OND), and the results showed that a larger amount of carbon- and nitrogen-containing chemical substances were generated in PET-U, accompanied by more aromatic and fluorescent compounds. The results provided theoretical bases and insights for future research on the risks of plastic debris from PU synthetic leathers on aquatic organisms and indicated feasible directions for exploring combined pollution studies of plastics.

Fabrication of ecofriendly jute fiber reinforced flexible planar composite as a potential alternative of leather

Natural fiber reinforced composites are a lightweight, affordable, and environmentally friendly replacement for many problematic applications. These natural fibers could be constructed into flexible planar materials with the aid of composite phenomena that can be used for a variety of applications where flexibility is important like as artificial leather. In this work, nonwoven matt made from spinning wastes of jute fiber was used to reinforce the biodegradable polyvinyl alcohol (PVA) matrix. The percentage of fibers within the PVA matrix was adjusted to develop the flexible planar composites. The nonwoven matt was immerged into the PVA solution casting mold with the aid of the solution evaporation approach. The flexible planar composite was then obtained through heat-induced pressing. Tensile strength, tearing strength, bending modulus, flexing endurance, abrasion resistance, and moisture management profiles of the developed flexible planar composite were assessed. Additionally, studies were performed for Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric (TGA) analysis. The tensile strength has been found 7.78 N/mm2 with 9.84% elongation for a 1.2 mm thick flexible composite. The flexing endurance has been supported by no visible crack formation against 50,000 flexing cycles. The moisture management profile has been ensured by the hydrophobic surface of the composite. Developed flexible planar composite has been shown to have consistent mechanical performance for use as artificial leather, which could be appealing for the fabrication of leather-alternative bags, belts, and wallets.

Implementasi Supply Chain Management Pada Toko Sandal Menggunakan Aplikasi Dolibarr (Studi Kasus : Kroya Shoes)

Information technology is currently undergoing changed and developments so rapidly that many trading companies need technology to support business proceses. Kroya Shoes is small company that sell various model of sandals made from synthetic leather. Problem in carrying out inventory management, difficulties in Enterprise Resource Planning (ERP) and problem often occur in the Supply Chain Management (SCM) of the company. The company' s business processes are implemented into dolibarr open source software. The final stage of the research was carried out using UAT questionaire and calculating the level of satisfaction of Dolibarr aplication user's with a likert scale. Calculation results the results of the survey carried out where to produce an average value with the convenience aspect of 67,5%, the average percentage value with usability aspect was 91,5% so that the total percentage obtained from all aspects was 79,5 % with a description of the score interpretation criteria, namely Good.

Microbial Approaches for the Plastic Bioremediation and Ecofriendly Environmental Sustainability

The world’s first “infinite” plastic waste is a major issue existing in both developed and developing countries. Synthetic plastics are correlated to the current lifestyle in packing of food, detergents, cosmetics, plastic bottles, sanitary wares, household utensils, artificial leather and pharmaceutical products. These synthetic plastics include polyurethane, polystyrene, polypropylene, low-density polyethylene, polyvinyl chloride, high-density polyethylene and polyethylene terephthalate in the descending order of recycling codes. Extensive use of these synthetic polymer materials paves way for accumulation in the ecosystem. Improper handling of this plastic wastes by traditional disposal methods like landfill and incineration in open fields leads to the release of toxic chemicals in the environment. The recent advancement in the degradation of synthetic plastics is concentrated on the use of microorganisms and their enzymes as biological treatment. The interaction between microbes and the plastic polymer is needed to understand for quenching the thirst for microbial bioremediation approach to overcome plastic pollution. However, knowledge of scientific evidence for plastic degradation by microbes is paucity. This review highlighted insight gist about the effective microbial technology applied in bioremediation techniques like in situ and ex situ strategies. Further exploration of the vast diversity of plastic-eating microorganisms and their enzymes involved in the mechanism results in a valuable end product. This literature represents the green route to the bio-recycling of harmful plastic material from the ecosystem.

Textile bio-based and bioactive coatings using vegetal waste and by-products

This work aimed to fulfil one of the great consumer trends related to ethically and environmentally sustainable attitudes. The main concept was to develop an alternative material to natural and synthetic leather by creating new bio-coated textile structures with improved environmental credentials, and to use vegetable wastes and by-products from agroforestry industries, as well as biopolymers. Different residues, such as sawdust and pine bark were successfully incorporated in polymeric aqueous formulations and applied as textile coatings. The Life Cycle Assessment of these new textile products showed that they present a lower environmental impact in comparison to natural leather used for clothing and shoe applications. Overall, the alternative material developed here is a favourable sustainable material. The use of by-products to create bio-based materials comprises a great potential for a broad spectrum of applications in other fields in the Textile and Clothing Industry such as fashion, eco-design, sports and protection apparel, furniture decoration, home textiles, footwear, fashion accessories, in addition to others.