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Fabrication of regenerated cellulose membranes with high tensile strength and antibacterial property via surface amination

机译：通过表面胺化制备高拉伸强度和抗菌性质的再生纤维素膜

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摘要

There is a growing interest in preparing membrane materials particularly with antibacterial surface and high mechanical strength from natural resources. In this work, to fabricate cellulose membrane with high tensile strength and antibacterial property, surface amination of regenerated cellulose (RC) membranes were studied. Four aminosilanes at different concentrations and the effects of alkoxyl quantity, alkoxyl chain length, and aminoalkyl chain length of aminosilanes on membrane performance were explored. The results indicated that all membranes were successfully grafted by aminosilanes with different grafting yield. The grafted RC membranes had high mechanical strength of 65.2-93.5 MPa with high hydrophobicity and thermal stability. Among aminosilanes-varying treatments, RC membranes grafted by 12% of N-[3-(trimethoxysilyl) propyl] ethylenediamine (TMSPED) which had three methoxy groups, the highest amount of amino groups, and the longest chain of aminoallcyl were demonstrated to be the most effective against Gram-positive bacteria. The bacteria killing ratio increased with improving amino content and reached almost 100%. The prepared colorless RC membranes with high tensile strength, high thermal stability, and enhanced antibacterial properties may provide more opportunities for further advancement and applications in active packaging.
机译：在制备膜材料方面，特别是具有抗菌表面和高机械强度的自然资源，存在越来越多的兴趣。在这项工作中，为了制造具有高拉伸强度和抗菌性的纤维素膜，研究了再生纤维素（RC）膜的表面胺化。探讨了四种氨基硅烷，不同浓度和烷氧基量，烷氧基链长度和氨基硅烷对膜性能的氨基烷基链长度的影响。结果表明，所有膜用氨基硅烷成功接枝，具有不同的嫁接产率。接枝的RC膜具有高机械强度为65.2-93.5MPa，具有高疏水性和热稳定性。在氨基硅烷 - 不同的处理中，将具有三种甲氧基的N-[3-（三甲氧基甲硅烷基）丙基]乙二胺（TMSPED）接枝的RC膜，并证明了氨基的最高量和最长链的氨基铝基。对革兰氏阳性细菌最有效。细菌杀伤比随着改善氨基含量而增加，达到近100％。制备的无色RC膜具有高抗拉强度，高热稳定性和增强的抗菌性能，可以在主动包装中进一步推进和应用提供更多机会。

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