PDF(Pubmed)
Abstract：
Non-biodegradable plastic materials pose environmental hazards and contribute to pollution. Arabinoxylan (AX) films have been created for applications in food packaging to replace these materials. The water interaction characteristics of biodegradable AX films were assessed following the extraction of AX from dry-milled corn bran (DCB), wet-milled corn bran (WCB), and dried distiller\'s grains with solubles (DDGS). Films were prepared with laccase and sorbitol before surface modification with lipase-vinyl acetate. Water solubility of the modified DCB films was significantly reduced (p < 0.05); however, the water solubility of modified WCB films decreased insignificantly (p > 0.05) compared to unmodified films. Water vapor permeability of the modified AX films from WCB and DDGS was significantly reduced (p < 0.05), unlike their unmodified counterparts. The biodegradation rates of the modified WCB AX and DDGS films increased after 63 and 99 days, respectively, compared to the unmodified films. The hydrophilic nature of AX polymers from WCB and DDGS enhances the biodegradability of the films. This study found that the modified WCB AX film was more hydrophobic, and the modified DDGS AX film was more biodegradable than the modified DCB AX film. Overall, surface modifications have potential for improving hydrophobicity of biopolymer films.
摘要：
不可生物降解的塑料材料构成环境危害并导致污染。阿拉伯木聚糖(AX)膜已经被制造用于食品包装中以替代这些材料。从干磨玉米麸皮（DCB）中提取AX后，评估了可生物降解AX膜的水相互作用特性，湿磨玉米麸皮（WCB），和含可溶物的干酒糟(DDGS)。在用脂肪酶-乙酸乙烯酯进行表面改性之前，用漆酶和山梨糖醇制备膜。改性DCB膜的水溶性显著降低(p<0.05);与未改性膜相比,改性WCB膜的水溶性降低不显著(p>0.05)。WCB和DDGS改性AX膜的水蒸气透过率显著降低(p<0.05),不像他们未经修改的同行。改性WCBAX和DDGS膜的生物降解速率在63天和99天后增加，分别,与未改性的薄膜相比。来自WCB和DDGS的AX聚合物的亲水性增强了膜的生物降解性。本研究发现改性后的WCBAX膜具有更强的疏水性,改性DDGSAX膜比改性DCBAX膜具有更好的生物降解性。总的来说,表面改性具有改善生物聚合物膜疏水性的潜力。
