Scholarlink

<p>The current study reports the synthesis of cellulose nanofibers (CNFs) from bleached, organosolv-treated rice straw fibers through an economical, integrated process that combines mechanical fibrillation using a Valley beater with a subsequent high-intensity ultrasonication step. Furthermore, the synthesized CNFs were esterified with citric acid and were applied to develop the reinforced polylactic acid (PLA)-based bio nanocomposite films (1-5wt.%) using the solution casting technique. The SEM morphology of CNFs and particle size distribution by DLS analysis confirm that the combined treatment of Valley beater and ultrasonication reduces the fiber diameters in the range of 12 to 48&#xa0;nm. Esterification of CNFs decreases the crystallinity index from 74.50% to 67.50% and increases the degree of substitution (DS) to a maximum of 0.271. FTIR spectra at around 1740&#xa0;cm<sup>− 1</sup> also confirm the esterification of CNFs, and TGA analysis shows the alterations in thermal properties and high char yield. The thickness of the films and moisture content correlate positively with the CNFs and citric acid modified CNFs (CACNFs) loading, whereas the density of the films decreases with increasing CNFs and CACNFs content. Adding 1wt.% CNFs and CACNFs raised the tensile strength by 7.10% and 12.45%, respectively, and PLA/1CACNFs shows 30.76% less water absorption capacity than PLA/1CNFs composite films. The developed PLA composites showed a breakdown temperature of 265.50 to 364.50℃. Nevertheless, the PLA/3CACNFs show a maximum crystallinity index of 53.80%. Moreover, PLA/1CACNFs composite shows less weight loss (6.5 wt%) (less biodegradability) as compared to the PLA/1CNFs composite films (6.1 wt%). The results conclude that PLA/1CACNFs bio-nanocomposite films can have immense potential for functional food packaging applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Rice straw biomass-based modified cellulose nanofibers (CNFs): reinforcement in polylactic acid (PLA) bio nanocomposite films

  • 期刊论文

  • 发表日期：

    2025年12月27日

查看全文
  • Makdud Islam,
  • Akhouri Sanjay Kumar Sinha,
  • Kamlesh Prasad

摘要

The current study reports the synthesis of cellulose nanofibers (CNFs) from bleached, organosolv-treated rice straw fibers through an economical, integrated process that combines mechanical fibrillation using a Valley beater with a subsequent high-intensity ultrasonication step. Furthermore, the synthesized CNFs were esterified with citric acid and were applied to develop the reinforced polylactic acid (PLA)-based bio nanocomposite films (1-5wt.%) using the solution casting technique. The SEM morphology of CNFs and particle size distribution by DLS analysis confirm that the combined treatment of Valley beater and ultrasonication reduces the fiber diameters in the range of 12 to 48 nm. Esterification of CNFs decreases the crystallinity index from 74.50% to 67.50% and increases the degree of substitution (DS) to a maximum of 0.271. FTIR spectra at around 1740 cm− 1 also confirm the esterification of CNFs, and TGA analysis shows the alterations in thermal properties and high char yield. The thickness of the films and moisture content correlate positively with the CNFs and citric acid modified CNFs (CACNFs) loading, whereas the density of the films decreases with increasing CNFs and CACNFs content. Adding 1wt.% CNFs and CACNFs raised the tensile strength by 7.10% and 12.45%, respectively, and PLA/1CACNFs shows 30.76% less water absorption capacity than PLA/1CNFs composite films. The developed PLA composites showed a breakdown temperature of 265.50 to 364.50℃. Nevertheless, the PLA/3CACNFs show a maximum crystallinity index of 53.80%. Moreover, PLA/1CACNFs composite shows less weight loss (6.5 wt%) (less biodegradability) as compared to the PLA/1CNFs composite films (6.1 wt%). The results conclude that PLA/1CACNFs bio-nanocomposite films can have immense potential for functional food packaging applications.