Increase In Adhesion Strength Research Articles

Kinetics of setting between dissimilar crystalline materials under thermo deformation effect

It has been established that the kinetic curves of adhesion (strength increase) are of the sigma type with the displacement period of the second stage relative to the first one. The period of this displacement is determined by starting of a marked metal flow over the micro-protrusion contact sections and its passing on the baton into a harder material under the second kind stresses. Activation of the contact surface of a harder material (corundum) occurs due to a handover of the deformation of the surface layer is plastically deformed micro-protrusions (grains) of the metal due to the effect of the second kind of micro-stresses which were much higher minimum yield strength of a harder material, thereby causing plastic deformation of the latter.

Application of Laser Thermocycling to Improve the Quality of Plasma Wear-Resistant Coatings

The problem of the article is designed to reveal the proposed, developed and researched new method of improving the adhesion strength of plasma wear-resistant coatings on the outer surfaces of weapons made of high-alloy, heat-resistant steels, using additional cyclic (3-4) times their heating by laser radiation to temperatures of 0.6 – 0.8Tpl for a few milliseconds. The purpose of increasing the resource of use and the quality of the appearance of the weapon by applying wear-resistant coatings with increased adhesion strength to the base using plasma gas-thermal spraying followed by laser thermal cycling. Determination of the main factors and parameters of the process of laser thermocycling of plasma coatings, their interrelationships, development of an algorithm for determining the conditions of laser thermocycling, establishment of the rational range of their values by mathematical modeling and experimental research. The results of mathematical modeling of laser cyclic heating of plasma coatings of HTN of different thicknesses are presented, which allows determining the irradiation parameters that ensure their heating to temperatures at the "coating-substrate" boundary ≤1000ºС, on the surface - to Т< Тpl, at maximum cooling rates. It has been proven that laser thermocycling provides an increase in the adhesion strength of coatings to the base from 14–18 to 90–110 MPa, a decrease in porosity from 10–12% to 7–8%, which is due to the redistribution of alloying components at the “coating–base” interface, with the formation of elements of the metallurgical connection, contributes to a significant increase in wear resistance and a decrease in the coefficient of friction due to the formation of secondary ultradispersed film structures. We consider laser thermocycling of plasma coatings is an effective method of improving their quality and strength of adhesion to the base.

Can TEMPO-Oxidized Cellulose Nanofibers Be Used as Additives in Bio-Based Building Materials? A Preliminary Study on Earth Plasters

Interest towards cellulose nanofibers obtained from virgin and waste sources has seen a significant growth, mainly thanks to the increasing sensitivity towards the concept of circular economy and the high levels of paper recycling achieved in recent years. Inspired by the guidelines of the green building industry, this study proposes the production and characterization of TEMPO-oxidized and homogenized cellulose nanofibers (TOHO CNF) from different sources and their use as additives for earth plasters on two different raw earth samples, characterized by geotechnical laboratory tests and mineralogical analysis: a high-plasticity clay (T2) and a medium-compressibility silt (ABS). Original sources, including those derived from waste (recycled cardboard and paper mill sludge), were characterized by determining chemical content (cellulose versus ashes and lignin) and fiber morphology. TOHO CNF derived from the different sources were compared in terms of nanofibers medium diameter, crystallinity degree, thermal decomposition and oxidation degree, that is the content of carboxylic groups per gram of sample. Then, a preliminary analysis of the influence of CNF on earth plasters is examined. Adhesion and capillary absorption tests highlighted the effect of such nanofibers on blends in function of two factors, namely the cellulose original source and the oxidation degree of the fibers. In particular, for both earth samples, T2 and ABS, a significant increase in adhesion strength was observed in the presence of some TOHO CNF additives. As far as capillary sorption tests, while an undesired increase in water adsorption was detected for T2 compared to the control, in the case of ABS, a significant reduction in water content was measured by adding TOHO CNF derived from recycled sources. These results pave the way for further in-depth investigation on the role of TOHO CNF as additives for earth plasters.

Nanostructural glasscomposite self-lubricant coatings

The results of the study of glass-composite nanostructured self-lubricating coatings are presented. The structural components of these coatings significantly affect the graphitization process and provide an antifriction surface layer of α-graphite. The formation of this layer makes it possible to significantly minimize the contact parameters in the friction region.
 A significant effect of aluminoborosilicate in the form of a glass phase on the tribological properties of coatings is noted. An increase in adhesive strength is achieved by forming a surface layer of glassy sodium silicate. The presence of near-surface particles in the graphite layer does not affect the tribotechnical characteristics of the coatings. The developed glass-composite nanostructured self-lubricating coatings have high antifriction characteristics throughout the entire load-speed range

A Strategy to Suppress the Electrochemo-Mechanical Degradation in Solvent-Free Electrodes for All-Solid-State Batteries

In response to the safety concerns on highly flammable liquid electrolytes in lithium-ion batteries (LIBs), the all-solid-state batteries (ASSBs) have emerged as promising alternatives for the next generation. The use of solid electrolytes with low flammability can provide resistance to fire/explosion incidents under abnormal conditions. In addition, it is expected that high power and high energy density can be achieved using high-voltage cathode materials due to the wide electrochemical window of solid electrolytes. Therefore, various solid electrolytes (polymer, inorganic, and composite solid electrolytes) were intensively studied.Among the solid electrolytes, sulfide-based inorganic solid electrolytes have attracted much attention due to their advantages. They have the highest ionic conductivity (10-2 ~ 10-3 S cm-1) at room temperature, comparable to a liquid electrolyte. Also, owing to its ductile characteristics, interfacial contact with electrode material is also good, and large-scale production is advantageous. However, there are many problems to be solved to realize ASSB with sulfide-based electrolytes. one of the main obstacles is to produce sheet-type electrodes with high active mass loading and good stability. The slurry process commonly used to manufacture sheet-type electrodes of LIBs cannot be directly applied to ASSBs because sulfide-based electrolytes exhibit high reactivity with most organic solvents. Even if the reactivity is not considered, in the slurry process, the bulk binder surrounds the electrode components and blocks the ion transfer pathway, thereby degrading the cell performance.In this regard, solvent-free processing has emerged as a novel manufacturing process to overcome these issues. It is well known that polytetrafluoroethylene (PTFE) can fibrillate under shear stress conditions. When PTFE is added to the electrode and stress is applied, the PTFE is thinly fibrillated within the electrode. These well-dispersed fibers bind electrode materials and form sheet-type electrode film without delamination. This novel process has little concern about reactivity as no solvent is added, and PTFE does not react with electrode components. Moreover, since the thinly fibrous binder is evenly spread throughout the electrode, a sheet-type electrode can be formed with a smaller amount than in the slurry process, and the ion transfer pathway in the electrode can be less blocked. However, solvent-free processing also has problems to be solved. The thinly fibrillated binder cannot provide sufficient adhesion strength between the electrode components. The insufficient adhesion strength of the binder cannot prevent the reduction in the contact area between the electrode and the electrolyte material due to volume expansion during the charge/discharge process, resulting in rapid performance degradation.In this work, we pre-treated PTFE to increase adhesion strength between electrode components and the cycling stability of the solvent-free electrode. When comparing the mechanical strength of solvent-free electrodes using the Surface and Interfacial Cut Analysis System (SAICAS) tool, electrodes with pre-treated PTFE had higher mechanical strength than electrodes with bare PTFE. Due to the higher mechanical strength, the pre-treated PTFE electrode had better cycling stability than the electrode with bare PTFE. This pre-treatment technology is expected to be a promising technology that can contribute to the realization of large-scale production and commercialization of ASSBs.

The Influence of Calendering on the Fast Charging Performance and Lithium Plating of Hard Carbon Blend Anodes

Lithium‐ion batteries ensuring high energy densities are the focus of ongoing research. The main challenge is the fast charging capability, which is restricted by transport limitations of the lithium‐ions. For this reason, graphite (Gr) and hard carbon (HC) blend anodes at different calendering degrees and, thus, electrode densities are investigated in terms of their structural features as well as their electrochemical performance. The motivation of blend anodes is the combination of the advantageous properties of these materials. Due to the different microstructures of Gr and HC, major differences in the lithiation process can be found. While the turbostratic structure of HC enables fast charging, its large specific surface area is associated with a low initial Coulombic efficiency and, thus, a loss of capacity. Consequently, the combination with Gr in blends is reasonable. While the lithium‐ion diffusion is enhanced using HC, the availability of the interporous structure of HC is highly dependent on the electrode density. In addition to an increase in adhesion strength and reduction in electrical resistance, a reduction in tortuosity and lithium plating can be demonstrated. Furthermore, a higher capacity retention in the charge rate test (up to 3C) at low coating densities was found for the blends.

Catch bond-inspired hydrogels with repeatable and loading rate-sensitive specific adhesion.

Biological receptor-ligand adhesion governed by mammalian cells involves a series of mechanochemical processes that can realize reversible, loading rate-dependent specific interfacial bonding, and even exhibit a counterintuitive behavior called catch bonds that tend to have much longer lifetimes when larger pulling forces are applied. Inspired by these catch bonds, we designed a hydrogen bonding-meditated hydrogel made from acrylic acid-N-acryloyl glycinamide (AA-NAGA) copolymers and tannic acids (TA), which formed repeatable specific adhesion to polar surfaces in an ultra-fast and robust way, but hardly adhered to nonpolar materials. It demonstrated up to five-fold increase in shear adhesive strength and interfacial adhesive toughness with external loading rates varying from 5 to 500 mm min−1. With a mechanochemical coupling model based on Monte Carlo simulations, we quantitatively revealed the nonlinear dependence of rate-sensitive interfacial adhesion on external loading, which was in good agreement with the experimental data. Likewise, the developed hydrogels were biocompatible, possessed antioxidant and antibacterial properties and promoted wound healing. This work not only reports a stimuli-responsive hydrogel adhesive suitable for multiple biomedical applications, but also offers an innovative strategy for bionic designs of smart hydrogels with loading rate-sensitive specific adhesion for various emerging areas including flexible electronics and soft robotics.

Titanium oxide coatings formed by plasma spraying followed by induction heat treatment

Porous titanium-containing coatings were formed on titanium samples by atmospheric plasma spraying. The resulting samples were subjected to induction heat treatment in an oxygen-containing (air) atmosphere at normal pressure and treatment temperature of 650–1250 °C. As a result of experimental studies, it was established that thermal modification allowed an increase in the oxygen content in the coatings from 49.6 ± 9.2 to 71.7 ± 1.1 at.%. The change in the elemental chemical composition was accompanied by the formation of titanium oxide coatings, the surface of which was distinguished by the presence of acicular crystals of titanium oxide (TiO), anatase, and rutile (TiO2) with an average length of 150–200 nm and a width of about 50–100 nm. Induction heat treatment also led to an increase in the microhardness of titanium oxide coatings from 1530 ± 55 to 1825 ± 191 HV0.98 and an increase in adhesive strength.

Chitosan based urapidil microparticle development in approach to improve mechanical strength by cold hyperosmotic dextrose solution technique

The objective of the study deal with chitosan based microparticle utilizing a novel method mentioned as cold hyperosmotic dextrose solution treatment. The poor mechanical strength of chitosan especially degradation in relation to pH of the medium, poor performance in extended release form as mentioned in literature solved. Microparticles formulated by ion cross-linking technique utilizing chitosan as cationic and small anions such as sodium citrate (SC), sodium sulphate (SS) and sodium tripolyphosphate (STPP) as cross-linkers. Anionic solutions were maintained at 20% w/v along with Dextrose (40% w/v, 15 °C and 2.02 Osmol). The prepared beads were collected on filtration and dried to get microparticles; furthermore subjected for characterization. Those were characterized for surface morphology, entrapment efficiency, and adhesive strength by texture analyzer, in-vitro release study, swelling index, ATR-FTIR, DSC, XRD and in-vivo antihypertensive study by Tail-cuff method. SEM study revealed non symmetrical appearance and porus structure especially in STPP formulation. However, entrapment gradually decreased with increase in chitosan. Whereas, texture analyzer exhibited gradual increase in adhesive strength which indicate obvious improvement in mechanical strength. Similarly, formulations were able prolonged the drug release for sufficient period of time; SC1 exhibited 72.59% at 44 h. From each group the formulation extended rug release for long period subjected to swelling index study; STPP continued to swell as compared to SC and SS. Mean particle size found to be 1.07 μm, 1.35 μm, and 2.17 μm for SC1, SS2 and TP1 microparticles respectively. The selected formulation “SC1” effectively reduced elevated blood pressure as observed in Tail-cuff method.

Adhesion strength of electrodeposited Ni, Zn, and Fe coatings with copper substrates

ABSTRACT This paper presents the adhesive strength values of electrodeposited nickel, zinc, and iron coatings on copper substrates at various deposition parameters, including laser-assisted stimulation of the deposition process. One of the factors determined to be responsible for the adhesive strength of metal films with a metal substrate is the formation of a diffusion zone at the ‘coating-substrate’ interface. It is shown that an increase in adhesive strength is achieved due to the expansion of the diffusion zone and the formation of solid solutions. The decrease in adhesive strength at high overpotentials is associated with the release of hydrogen and the formation of intermediate phases.

The role of immobilized quorum sensing strain in promoting biofilm formation of Moving Bed Biofilm Reactor during long-term stable operation

Quorum sensing (QS) signaling plays a significant role in the natural regulation of biofilm formation. Multiple species QS systems in wastewater treatment processes have received significant attention in recent years and this study presents a long-term analysis of QS signaling, bacterial structures and extracellular polymeric substance (EPS) during biofilm formation, detachment and reformation processes. Six types of Acyl homoserine lactones (AHLs) were found to be closely related to different phases of biofilm development, with both QS and quorum quenching (QQ) strains being identified as drivers of various biofilm phases and 10 strains presenting a close relationship with AHLs (p < 0.05). Meanwhile, QS strain Sphingomonas rubra was immobilized and added into reactor systems, resulting in significant increase in AHL content, EPS production, and adhesion strength of biofilm (p < 0.05), which might promote biofilm formation processes during long-term stable operation. This study provides a potentially simple and economical way to improve activity and stability of MBBR in complex wastewater systems.

Biodegradable Block Copolymer-Tannic Acid Glue.

Bioadhesives are becoming an essential and important ingredient in medical science. Despite numerous reports, developing adhesive materials that combine strong adhesion, biocompatibility, and biodegradation remains a challenging task. Here, we present a biocompatible yet biodegradable block copolymer-based waterborne superglue that leads to an application of follicle-free hair transplantation. Our design strategy bridges self-assembled, temperature-sensitive block copolymer nanostructures with tannic acid as a sticky and biodegradable polyphenolic compound. The formulation further uniquely offers step-by-step increases in adhesion strength via heating–cooling cycles. Combining the modular design with the thermal treating process enhances the mechanical properties up to 5 orders of magnitude compared to the homopolymer formulation. This study opens a new direction in bioadhesive formulation strategies utilizing block copolymer nanotechnology for systematic and synergistic control of the material’s properties.

Nanostructural glass composite coatings

The results of the study of glass-composite nanostructured self-lubricating coatings are presented. The developed glass composite is an antifriction material with an ultrafine structure. The structural components of these coatings significantly affect the graphitization process and provide an antifriction surface layer of α-graphite. The formation of this layer makes it possible to significantly minimize the contact parameters in the friction region.&#x0D; The developed antifriction nanostructured glass-ceramic self-lubricating coatings containing magnesium carbide and structural components that promote surface graphitization do not contain expensive and scarce components, meet environmental safety requirements, and have high performance characteristics. A significant effect of aluminoborosilicate in the form of a glass phase on the tribological properties of coatings is noted. An increase in adhesive strength is achieved by forming a surface layer of glassy sodium silicate. Using X-ray phase analysis, it was found that the intercalating elements in the subsurface zone-graphite system at the initial stage of the process were Mg2+, Al3+, Cu2+ ions, which randomly penetrated into the interlayer space of the graphite matrix. At sliding speeds of more than 3.0 m/s, intercalates of binary molecular compounds of these elements with oxygen were found in the layered system of graphite. Their intercalation is accompanied by a sequence of repetitive stages, which are reversible with a change in tribological parameters and are characterized by a specific transformation of the structure and, above all, by an increase in the distance between layers due to the influence of various types of interlayer defects and the introduction of intercalants.&#x0D; The presence of near-surface particles in the graphite layer does not affect the tribotechnical characteristics of the coatings. The developed glass-composite nanostructured self-lubricating coatings have high antifriction characteristics throughout the entire load-speed range

Enhancement in adhesive bonding of aluminum alloy by steam treatment studied by energy loss near edge fine structures in electron energy loss spectroscopy

A simple surface treatment by steam on aluminum substrate can enhance the bonding strength with epoxy adhesives. We studied the mechanism of the effect of steam on adhesive bonding by using scanning transmission electron microscopy coupled with electron energy loss spectroscopy (STEM-EELS). The observed increase of adhesion strength was achieved by diffusion of the adhesive molecules into the nanopores of the aluminum surface, which switched the failure mode from interfacial failure to cohesive failure. Investigation of electron energy loss near edge fine structure (ELNES) in EELS allows us to find chemical bonding that form via acid–base interactions between the amino moiety of the adhesive and the hydroxyl groups on the aluminum surface. This weak bonding may not contribute directly to the increase of adhesion strength, but it induces spontaneous diffusion of the adhesion molecules into the pores via thermodynamically favored acid–base interfacial interactions.

Evaluation of Layer Adhesion and Uniformity in Poly(lactic acid) and Thermoplastic Starch Multilayered Films

Multilayered films of poly(lactic acid) (PLA) and thermoplastic starch (TPS) offer complementary characteristics that are promising for sustainable packaging applications. In this study, an in-house designed three-line coextrusion process was developed to fabricate layered films. These films were produced at varying shear rates and viscosity ratios with and without compatibilizers. Rheological and thermal analyses were used to investigate adhesion strength and uniformity. Results showed the processing shear rate has a significant effect up to 136% on adhesion strength, its maximum at 10.6 s–1. Viscosity ratio, varied by plasticizer content in TPS, impacted adhesion strength up to 48% within the studied ranges, showing its maximum at 25 wt % added plasticizers. Results showed that 2.5 wt % of compatibilizer, maleic anhydride, within TPS increased adhesion strength up to 35%. Thermal analysis of layers at different locations along the cross-section revealed that the viscosity ratio had a defining impact on layer uniformity of TPS within PLA layers. This study highlights the importance of material and processing parameters in designing a biobased sustainable packaging solution.

Modification of Hot-Melt Adhesives Based on Metallocene Poly(ethylene-propylene) Copolymer for High Adhesion to Polar Surfaces

A procedure is described of grafting the acrylic acid onto an oxygen/ozone-activated metallocene poly(ethylene-co-propylene). Consequently, the grafted copolymer is applied as a component in a metallocene polyolefin-based hot-melt adhesive composition with increased adhesion. The surface properties and adhesion strength of the prepared hot-melt adhesive (HMA) were determined and used to account for the effect of grafting. The application of grafted polyolefin as one of the components of the HMA mixture provides significant increase in adhesive strength, and it also results in increased compatibility and negligible effects on the technological parameters of the final composition. The obtained results may have significant impact for the practical application of prepared HMA for book bonding.

Biomimicking interfacial fracture behavior of lizard tail autotomy with soft microinterlocking structures

Biological soft interfaces often exhibit complex microscale interlocking geometries to ensure sturdy and flexible connections. If needed, the interlocking can rapidly be released on demand leading to an abrupt decrease of interfacial adhesion. Here, inspired by lizard tail autotomy where such apparently tunable interfacial fracture behavior can be observed, we hypothesized an interlocking mechanism between the tail and body based on the muscle-actuated mushroom-shaped microinterlocks along the fracture planes. To mimic the fracture behavior of the lizard tail, we developed a soft bilayer patch that consisted of a dense array of soft hemispherical microstructures in the upper layer acting as mechanical interlocks with the counter body part. The bottom control layer contained a microchannel that allowed to deflect the upper layer when applying the negative pressure, thus mimicking muscle contraction. In the microinterlocked condition, the biomimetic tail demonstrated a 2.7-fold and a three-fold increase in adhesion strength and toughness, respectively, compared to the pneumatically released microinterlocks. Furthermore, as per the computational analysis, the subsurface microchannel in the control layer enabled augmented adhesion by rendering the interface more compliant as a dissipative matrix, decreasing contact opening and strain energy dissipation by 50%. The contrasting features between the microinterlocked and released cases demonstrated a highly tunable adhesion of our biomimetic soft patch. The potential applications of our study are expected in soft robotics and prosthetics.

Effect of zirconia secondary peening on the microstructure and mechanical behavior of Al6061 cold spray coatings

Cold spray technology is commonly used to repair metallic components with limited temperature influence on the original component. However, for many commercial alloys, such as Al6061, it is still challenging to achieve dense deposits by using low-priced nitrogen gas. The objective of this work was to investigate the effect of secondary peening with zirconia (ZrO2) ceramic beads on the microstructure and mechanical properties of the Al6061 cold spray coatings. Al6061 spherical powder with an average size of 20 μm coupled with zirconia beads of ~210 μm were deposited onto Al6061-T6 substrates using N2 as the carrier gas. The microstructure and mechanical properties of coatings were compared with coatings produced using He and N2 process gases. Microstructural characterization was performed using optical and scanning electron microscopy. Coatings produced with He process gas resulted in lowest porosity and with better mechanical properties compared to the coatings produced using N2 and N2 along with ZrO2. The use of ZrO2 along with N2 process gas resulted in ~15% increase in microhardness, ~680% increase in adhesion strength, ~28% reduction in porosity, and ~34% increase in tensile strengths in the coatings when compared with the coatings produced using N2 process gas only. However, both coatings produced using N2 and N2 coupled with ZrO2 exhibited brittle behavior with no appreciable ductility. Even with this limitation, using ZrO2 as a secondary peening media could provide a cheaper alternative to using He gas for certain cold spray applications where a higher hardness and good adhesion strengths are needed.

Computational modelling of cell motility modes emerging from cell-matrix adhesion dynamics.

Lymphocytes have been described to perform different motility patterns such as Brownian random walks, persistent random walks, and Lévy walks. Depending on the conditions, such as confinement or the distribution of target cells, either Brownian or Lévy walks lead to more efficient interaction with the targets. The diversity of these motility patterns may be explained by an adaptive response to the surrounding extracellular matrix (ECM). Indeed, depending on the ECM composition, lymphocytes either display a floating motility without attaching to the ECM, or sliding and stepping motility with respectively continuous or discontinuous attachment to the ECM, or pivoting behaviour with sustained attachment to the ECM. Moreover, on the long term, lymphocytes either perform a persistent random walk or a Brownian-like movement depending on the ECM composition. How the ECM affects cell motility is still incompletely understood. Here, we integrate essential mechanistic details of the lymphocyte-matrix adhesions and lymphocyte intrinsic cytoskeletal induced cell propulsion into a Cellular Potts model (CPM). We show that the combination of de novo cell-matrix adhesion formation, adhesion growth and shrinkage, adhesion rupture, and feedback of adhesions onto cell propulsion recapitulates multiple lymphocyte behaviours, for different lymphocyte subsets and various substrates. With an increasing attachment area and increased adhesion strength, the cells' speed and persistence decreases. Additionally, the model predicts random walks with short-term persistent but long-term subdiffusive properties resulting in a pivoting type of motility. For small adhesion areas, the spatial distribution of adhesions emerges as a key factor influencing cell motility. Small adhesions at the front allow for more persistent motility than larger clusters at the back, despite a similar total adhesion area. In conclusion, we present an integrated framework to simulate the effects of ECM proteins on cell-matrix adhesion dynamics. The model reveals a sufficient set of principles explaining the plasticity of lymphocyte motility.

Polydopamine nanoparticles and hyaluronic acid hydrogels for mussel-inspired tissue adhesive nanocomposites

Bioadhesives are intended to facilitate the fast and efficient reconnection of tissues to restore their functionality after surgery or injury. The use of mussel-inspired hydrogel systems containing pendant catechol moieties is promising for tissue attachment under wet conditions. However, the adhesion strength is not yet ideal. One way to overcome these limitations is to add polymeric nanoparticles to create nanocomposites with improved adhesion characteristics. To further enhance adhesiveness, polydopamine nanoparticles with controlled size prepared using an optimized process, were combined with a mussel-inspired hyaluronic acid (HA) hydrogel to form a nanocomposite. The effects of sizes and concentrations of polydopamine nanoparticles on the adhesive profiles of mussel-inspired HA hydrogels were investigated. Results show that the inclusion of polydopamine nanoparticles in nanocomposites increased adhesion strength, as compared to the addition of poly (lactic-co-glycolic acid) (PLGA), and PLGA-(N-hydroxysuccinimide) (PLGA-NHS) nanoparticles. A nanocomposite with demonstrated cytocompatibility and an optimal lap shear strength (47 ± 3 kPa) was achieved by combining polydopamine nanoparticles of 200 nm (12.5% w/v) with a HA hydrogel (40% w/v). This nanocomposite adhesive shows its potential as a tissue glue for biomedical applications.