Bioinspired Crosslinked Nanocomposites of Polyvinyl Alcohol‐Reinforced Cellulose Nanocrystals Extracted from Rice Straw with Ethanedioic Acid

Abstract

In this study, cellulose nanocrystals (CNC) were extracted from rice straw and incorporated into polyvinyl alcohol (PVOH) as reinforcement nanofillers. Multiple nanocomposites with different CNC contents were prepared. Extracted CNC appear as long, well-defined rodlike crystals with a high aspect ratio (41). Nanocomposites with 3 wt% of CNC significantly exhibit improved tensile strength (60.4%) and maximum degradation temperature (287°C). Moreover, they demonstrate a decrease in water vapor permeability rate and in the swelling and solubility indices of PVOH/CNC. Significant improvements were observed when nanocomposites were crosslinked specifically in terms of tensile strength (104.8%) and maximum degradation temperature (364°C). They also demonstrate greatly reduced water vapor permeability rate, swelling, and solubility indices. The optimum CNC amount for both nanocomposites is 3 wt%.

Dispersibility Characterization of Cellulose Nanocrystals in Polymeric-Based Composites

“…Previous studies hypothesized that the thermal stability of the composites was improved when the CNC had good interfacial interactions with the matrix . As shown in Figure B, Wang et al observed the thermal stability of the composites was improved, which was attributed to the good dispersibility of the CNC , and the hydrogen bonding network in the matrix . Thus, a well-dispersed CNC will delay the thermal degradation process of the material, resulting in an improved degradation temperature. ,− The well-dispersed CNC can act as a thermal barrier and mass transfer barrier during the decomposition process to improve the thermal stability of the material.…”

Cellulose Nanoparticles:systematic Review

“…Se comprobó que, la celulosa bacteriana (BC) ha tenido un tenido un gran realce, porque se ha utilizado de gran manera en el ámbito de la electrónica flexible, dispositivos biomédicos, cosméticos, ingeniería de tejidos, liberación de fármacos, debido a su excelente seguridad y confiabilidad. También por las buenas propiedades conductivas que posee, al ser aplicados rellenos conductivos (CNT y PP), esto ayudaría a incrementar aun las incompuesto fibras de BC conductivo, con el fin de innovar con la tecnología ecológicas y biodegradable, a fin de recolectar energía portátil [18].…”