纤维级氧化锌抗菌聚酯的结晶行为与流变性能  

Crystallization Behaviors and Rheological Properties of Fiber Grade Antibacterial Polyester Modified by Zinc Oxide

作　　者：李婧楠 杨新华 王松林 李院院 张超 周攀飞 LI Jing-nan;YANG Xin-hua;WANG Song-lin;LI Yuan-yuan;ZHANG Chao;ZHOU Pan-fei(Zhejiang Hengyi Petrochemical Research Institute Co.,Ltd.,Hangzhou 311200,Zhejiang,China)

机构地区：[1]浙江恒逸石化研究院有限公司,浙江杭州311200

出　　处：《合成纤维》2024年第7期1-6,13,共7页Synthetic Fiber in China

基　　金：浙江省科技计划项目(2022C01116)。

摘　　要：采用原位聚合法将纳米氧化锌(ZnO)作为抗菌剂引入聚对苯二甲酸乙二醇酯(PET)中制备出抗菌PET切片。对比研究了常规PET切片与抗菌PET切片在不同结晶条件下的结晶行为与结晶动力学。ZnO的引入能够促进抗菌PET在较高温度下的成核能力,使得抗菌PET切片的结晶温度明显提升。在不同的降温速率下,抗菌PET切片均具有更强的结晶性能,且Mo方程对于切片的非等温结晶过程具有较好的拟合性。等温结晶动力学结果表明,抗菌PET切片具有更短的结晶时间与更快的结晶速率,其结晶机制几乎未发生改变。比较两种切片的流变性能,发现在285~295℃范围内,相比于常规PET切片,含纳米ZnO的抗菌PET切片的熔体黏度更高,非牛顿指数更低,且其黏度随剪切速率变化更为明显。Zinc oxide(ZnO) nanoparticles were used as antibacterial agent and introduced into poly(ethylene terephthalate)(PET) by in-situ polymerization method to prepare antibacterial modified polyester chips.The crystallization behavior and crystallization kinetics of regular PET chips and antibacterial PET chips were investigated and compared under different crystallization procedures.The introduction of ZnO improved the nucleation ability of PET at higher temperatures,resulting in a significantly increased crystallization temperature of PET.At different cooling rates,the antibacterial PET chips had stronger crystallization properties,and the Mo equation had a good fit for the non-isothermal crystallization process of the chips.The results of isothermal crystallization kinetics show that the antibacterial PET chips have shorter crystallization time and faster crystallization rate,and the crystallization mechanism is almost unchanged.Comparing the rheological properties of the two chips,it is found that the melt viscosity of the antibacterial PET chips containing nano-ZnO is higher and the non-Newtonian index is lower than that of the regular PET chips in the range of 285~295 ℃,and the viscosity changes more obviously with the shear rate.

关 键 词：聚对苯二甲酸乙二醇酯 氧化锌 抗菌剂 结晶行为 流变性能 

分 类 号：TQ342.21[化学工程—化纤工业] TQ340.141