氧化锌抗菌聚酯的制备及其性能

摘要/Abstract

摘要： 将纳米ZnO分散在乙二醇（EG）溶液中制成ZnO- EG分散液，然后采用原位聚合法将单体精对苯二甲酸(PTA)、EG和ZnO-EG分散液进行酯化缩聚得到抗菌改性聚酯。分析抗菌改性聚酯的聚合工艺过程，采用激光粒度分析仪对ZnO-EG分散液的粒径分布进行表征；通过偏光显微镜和DSC对抗菌改性聚酯的切片形貌和熔点进行分析，并对抗菌改性聚酯的色值、特性黏度、端羧基含量、二甘醇含量以及抗菌性能进行测定。结果表明：湿法研磨制得的纳米氧化锌分散液粒径明显小于磁力搅拌所制得，且随着湿法研磨时间的增加，分散液粒径呈现先减小后增大的趋势；当抗菌聚酯的ZnO质量分数为0.5%，特性黏度为0.687 dL/g时，纳米ZnO抗菌剂在聚酯中没有发生明显团聚而形成凝集粒子，且均匀分散在聚酯切片中；纳米ZnO抗菌剂的加入使抗菌聚酯的色值偏向光亮黄绿色，抗菌聚酯对大肠杆菌、金黄色葡萄球菌和白色念珠菌的抑菌率分别为92%、99%和78%，起到了明显的抗菌效果。

关键词: 纳米氧化锌, 聚对苯二甲酸乙二醇酯, 原位聚合, 聚酯品质, 抗菌性能

Abstract: With the development of economy and the improvement of living standards, people have more and more requirements on the functionality of textiles, and the concept of health and safety has become a common understanding. Polyethylene terephthalate (PET) has good spunability and mechanical properties, and is widely used in household textile, medical textile, industrial textile and other fields. Therefore, more and polyester has been paid to the antibacterial function of polyester.
For the more convenient and effective one-step preparation of antibacterial modified polyester with better dispersion effect of antibacterial agent, nano-zno was selected as the antibacterial agent in this paper, and nano-zno was dispersed in ethylene glycol (EG) solution to make ZnO-EG dispersion solution. Then the monomer purified terephthalic acid (PTA), EG and ZnO-EG dispersion were esterified and condensed by in situ polymerization to obtain antimicrobial modified polyester. The polymerization process of antibacterial modified polyester was analyzed, and the particle size distribution of ZnO-EG dispersion was characterized by laser particle size analyzer. The slice morphology and melting point of the antibacterial modified polyester were analyzed by polarizing microscope and DSC, and the color value, characteristic viscosity, carboxyl terminal content, diethylene glycol content and antibacterial properties of the antibacterial modified polyester were determined. The results show that the particle size of the nano-zno dispersion prepared by wet grinding is obviously smaller than that prepared by magnetic stirring, and with the increase of the wet grinding time, the particle size of the dispersion decreases first and then increases. When the ZnO mass fraction of the antibacterial polyester is 0.5% and the intrinsic viscosity is 0.687 dL/g, the nano-zno antibacterial agents do not agglomerate in the polyester and form agglomerative particles, which are uniformly dispersed in the polyester slices. With the addition of nano-zno antibacterial agents, the color value of the antibacterial polyester tends to bright yellow-green, and the melting point moves to high temperature. The antibacterial polyester has obvious antibacterial effect on Escherichia coli, Staphylococcus aureus and Candida albicans, with the inhibition rates being 92%, 99% and 78%, respectively.
In this paper, antibacterial modified polyester is prepared by in-situ polymerization, and the particle size distribution of ZnO-EG dispersion and the polymerization process of antibacterial modified polyester are studied, which provides a new idea for the optimization of synthesis process of antibacterial modified polyester. The quality of the antibacterial modified polyester is analyzed, which provides some reference for the future application in the field of plastic fibers.

Key words: nano Zinc oxide, PET, in-situ polymerization, polyester quality, mold resistance

中图分类号:

TB34

章瑞, 李院院, 周攀飞, 张顺花. 氧化锌抗菌聚酯的制备及其性能[J]. 现代纺织技术, 2023, 31(3): 113-120.

ZHANG Rui, LI Yuanyuan, ZHOU Panfei, ZHANG Shunhua. Preparation and properties of zinc oxide antibacterial polyester[J]. Advanced Textile Technology, 2023, 31(3): 113-120.

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