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首页> 外文期刊>Journal of Applied Polymer Science >One pot blending of biopolymer-TiO2 composite membranes with enhanced mechanical strength
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One pot blending of biopolymer-TiO2 composite membranes with enhanced mechanical strength

机译：一锅共混具有增强的机械强度的生物聚合物-TiO2复合膜

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摘要

A biopolymer-TiO2 composite membrane was prepared by blending of N-[(2-hydroxy-3-trimethylammonium) propyl] chloride chitosan and cellulose acetate with nano-TiO2 particles as the introduced inorganic components. It was verified that the amino groups (NH2) of chitosan (CTS) were partly grafted by stronger hydrophilic group CH2CH(OH)CH2N(CH3)(3)(+) according to the H-1-nuclear magnetic resonance spectra of N-[(2-hydroxy-3-trimethylammonium) propyl] chloride chitosan and attenuated total reflectance Fourier transform infrared spectroscopy. The structure, microcosmic morphology, water flux, swelling properties, and thermal stability of the composite membranes were characterized. With the mass ratio of cellulose acetate to CTS being 50 wt %, the mole ratio of CTS to glycidyl trimethylammonium chloride being 1 : 1, and drying temperature being 60 degrees C in 70% acetic acid, the formed biopolymer-TiO2 composite membranes exhibited enhanced mechanical strength (84.29 MPa), lower swelling degree (101.36%), and improved antibacterial activity against Gram-negative Escherichia coli (Rosetta and DH5) and Gram-positive Bacillus subtilis. The existence of nano-TiO2 particles and the introduction of stronger cationic group synergistically improved the antibacterial properties of the biopolymer-TiO2 composite membranes. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42732.
机译：通过将N-[（（2-羟基-3-三甲基铵）丙基]氯化壳聚糖和醋酸纤维素与纳米TiO2颗粒作为引入的无机组分共混，制备了生物聚合物-TiO2复合膜。根据N-的H-1核磁共振谱，证实壳聚糖（CTS）的氨基（NH2）部分被较强的亲水基团CH2CH（OH）CH2N（CH3）（3）（+）接枝。 [（2-羟基-3-三甲基铵）丙基]壳聚糖和衰减全反射傅里叶变换红外光谱。表征了复合膜的结构，微观形态，水通量，溶胀性能和热稳定性。在乙酸纤维素与CTS的质量比为50重量％，CTS与缩水甘油基三甲基氯化铵的摩尔比为1：1，在70％乙酸中的干燥温度为60℃的情况下，所形成的生物聚合物-TiO 2复合膜表现出增强的性能。机械强度（84.29 MPa），较低的溶胀度（101.36％）和对革兰氏阴性大肠杆菌（Rosetta和DH5）和革兰氏阳性枯草芽孢杆菌的抗菌活性得到改善。纳米TiO2颗粒的存在和较强阳离子基团的引入协同改善了生物聚合物-TiO2复合膜的抗菌性能。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42732。

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