Abstract Caproylated starch (CS) with different degrees of substitution (DS) and poly(acrylic acid)-g-protein-g-poly(methyl acrylate) (PAA-g-protein-g-PMA) were prepared and then blended as an adhesive material to improve the adhesion of starch to polylactic acid (PLA) fibers for fulfilling the high-valued utilization of feather wastes and enhancing the end-use issue of starch in textile sizing. The CS and PAA-g-protein-g-PMA were characterized by Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance (1H NMR), respectively. The adhesion was evaluated by measuring bonding forces of the blends to PLA fibers. The FT-IR and 1H NMR analyses demonstrated the successful preparations of CS and PAA-g-protein-g-PMA, respectively. The adhesion results showed that the adhesion of CS/PAA-g-protein-g-PMA blends to PLA fibers were superior to that of acid-converted starch (40.6 N), indicating that blending can improve the adhesion of starch to PLA fibers. The adhesion of the blends to PLA fibers was correlated with the DS values of CS samples and blending ratios of PAA-g-protein-g-PMA to CS. With the increase in the DS, bonding force increased, reached its highest value of 53.9 N at DS = 0.027, and then decreased to 52.2 N (DS = 0.033). When the DS value was 0.027, the forces gradually increased from 45.5 to 53.9 N as the ratios were raised from 0 to 7.5 wt%. In brief, the suitable DS value and blending ratios were 0.027 and 5~7.5 wt% for the use of CS/PAA-g-protein-g-PMA blend as an adhesive material in the application of PLA sizing.

中文翻译：

---

将己酰化淀粉与聚（丙烯酸）-g-蛋白-g-聚（丙烯酸甲酯）混合作为粘合材料以提高淀粉对PLA纤维的粘合力

摘要 制备了不同取代度 (DS) 的己酰化淀粉 (CS) 和聚(丙烯酸)-g-蛋白质-g-聚(丙烯酸甲酯) (PAA-g-蛋白质-g-PMA)，然后共混为提高淀粉对聚乳酸 (PLA) 纤维的粘附力的粘合剂材料，以实现羽毛废料的高价值利用，并提高淀粉在纺织品上浆中的最终用途问题。CS 和 PAA-g-蛋白质-g-PMA 分别通过傅里叶变换红外 (FT-IR) 光谱和质子核磁共振 (1H NMR) 进行表征。通过测量共混物与 PLA 纤维的结合力来评估粘合力。FT-IR 和 1H NMR 分析分别证明了 CS 和 PAA-g-蛋白质-g-PMA 的成功制备。粘附结果表明，CS/PAA-g-蛋白质-g-PMA共混物对PLA纤维的粘附力优于酸转化淀粉（40.6 N），表明共混可以提高淀粉对PLA纤维的粘附力。共混物对 PLA 纤维的附着力与 CS 样品的 DS 值和 PAA-g-蛋白质-g-PMA 与 CS 的混合比相关。随着 DS 的增加，结合力增加，在 DS = 0.027 时达到最高值 53.9 N，然后下降到 52.2 N（DS = 0.033）。当 DS 值为 0.027 时，随着比率从 0 增加到 7.5 wt%，力逐渐从 45.5 增加到 53.9 N。简而言之，在PLA施胶应用中使用CS/PAA-g-蛋白质-g-PMA共混物作为粘合剂材料的合适DS值和共混比为0.027和5~7.5wt%。