Packaging and degradability properties of polyvinyl alcohol/gelatin nanocomposite films filled water hyacinth cellulose nanocrystals

A New Wood Adhesive Based on Recycling Camellia oleifera Cake-Protein: Preparation and Properties

“…From the perspective of chemical equilibrium, the introduced DSP, SPI, and casein promoted the effective degradation of Camellia oleifera cake-protein, so that the protein was more prone to degradation, dispersion, and extension in the alkaline solution: (1) More reactivity sites were generated in the system ( Figure 10 ), which was good for the bonding of the adhesive in the chemical form, and hydrogen bonds were transformed into covalent bonds, which was more conducive to the establishment of a compact crosslinked structure [ 36 , 37 ]; (2) DSP, SPI, and casein were degraded into peptide chains with lower molecular weights, which were interspersed in the system; thus, enhancing the overall flexibility of the adhesive and enhancing the acting force and hydrogen-bond interaction between the crosslinker and hydrolysate. Moreover, this contributed to a better elastic contact and regular array between crosslinking products; the crosslinked structure and crosslinking density were further strengthened ( Figure 10 ); and the cured adhesive layer formed a compact reticular structure, which could prevent the wedging of moisture and further strengthened the water resistance of the adhesive; (3) The toughening effect of peptide chains relieved the increase in the brittleness induced by the excessive crosslinking of the adhesive system and the water evaporation in the hot-pressing process, and avoided the degradation of the bonding performance, which was macroscopically shown by the good bonding performance and durability; (4) In addition, the branching of the adhesive system enlarged the contact area with the fibrous structure of the wood, enhanced the interaction between hydrophilic groups and hydrophobic groups, and further improved the bonding performance of the Camellia oleifera cake-protein adhesives.…”

Facile preparation of transparent poly (γ‐glutamic acid) modified poly (vinyl alcohol) hydrogels with high tensile strength and toughness

“…Various synthetic and natural polymer materials have been developed for preparing the hydrogels. As one of the most popular materials in biomedical field, polyvinyl alcohol (PVA) have been wildly developed due to its good biodegradability, biocompatibility, hydrophilicity (large number of hydroxyl groups) and low cost 7–9 . However, the practical applications of commonly prepared PVA hydrogels in biomedical fields are often limited by their weak mechanical properties under swelling equilibrium 10,11 .…”

“…As one of the most popular materials in biomedical field, polyvinyl alcohol (PVA) have been wildly developed due to its good biodegradability, biocompatibility, hydrophilicity (large number of hydroxyl groups) and low cost. [7][8][9] However, the practical applications of commonly prepared PVA hydrogels in biomedical fields are often limited by their weak mechanical properties under swelling equilibrium. 10,11 For PVA hydrogels, freeze-thaw method which can obtain physically cross-linked PVA hydrogels, attract much attention due to its easy operation and non-toxicity.…”

Preparation and properties of PBAT/PLA composites modified by PVA and cellulose nanocrystals

“…Modified biodegradable materials are mainly integrated with functional additives such as microcrystalline cellulose (MCC), 12 cellulose nanofiber (CNF), 13 micro fibrillated cellulose (MFC), 14 cellulose nanowhiskers (CNWs), 15 cellulose nanocrystal (CNC), 16–18 and bacterial cellulose (BC) 19 . For instance, CNC is a one‐dimensional rigid rod‐shaped cellulose nanomaterial with a diameter of 5–20 nm, a length of 50–300 nm, high crystallinity, degradability, biocompatibility, and reproducibility.…”