Abstract：
Cellulose nanofibrils (CNFs) can form strong biodegradable films; however, due to their hydrophilicity, moisture can degrade their mechanical and barrier properties. Corn zein (CZ) is a hydrophobic protein that when covalently linked with CNF films through peptide bonds, may improve their hydrophobicity. CZ was covalently linked to aminophenylacetic acid and aminobenzoic acid esterified CNF films which were then assessed for evidence of modification, hydrophobicity, mechanical properties, and antioxidant activity. Upon modification, an increase in hydrophobicity and an increase in antioxidant activity as evidenced by 57% higher 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical and 26% higher (2,2\'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) ABTS scavenging activities when compared to control CNF films, and reduced thio barbituric acid reactive substances (TBARS) values in canola oil during 14 days of 50 °C storage were noted. Results demonstrate that modification of CNF films with a hydrophobic protein such as CZ can increase the hydrophobicity of these biodegradable films while providing active antioxidant functionality.
摘要：
纤维素纳米原纤维（CNFs）可以形成坚固的生物可降解薄膜；然而，由于它们的亲水性，水分会降低其机械和阻隔性能。玉米醇溶蛋白（CZ）是一种疏水蛋白，当通过肽键与CNF膜共价连接时，可以改善它们的疏水性。CZ与氨基苯乙酸和氨基苯甲酸酯化的CNF膜共价连接，然后评估改性的证据。疏水性,机械性能，和抗氧化活性。修改后，与对照CNF膜相比,2,2-二苯基-1-吡啶酰肼(DPPH)自由基的增加57%和(2,2'-氮杂-双(3-乙基苯并噻唑啉-6-磺酸)ABTS清除活性的增加证明了疏水性和抗氧化活性的增加,注意到在50°C储存14天期间低芥酸菜籽油中的硫代巴比妥酸反应性物质（TBARS）值降低。结果表明,用疏水蛋白如CZ修饰CNF膜可增加这些生物可降解膜的疏水性,同时提供活性抗氧化功能。
