超声辅助磷酸对对位芳纶纤维的亲水改性  

Hydrophilic Modification of Para-aramid Fiber by Ultrasound-assisted Phosphoric Acid

作　　者：刘倩[1] 惠岚峰[1] 刘子琪 LIU Qian;HUI Lanfeng;LIU Ziqi(College of Light Industry Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学轻工科学与工程学院,天津300457

出　　处：《天津科技大学学报》2021年第6期15-21,共7页Journal of Tianjin University of Science & Technology

基　　金：国家重点研发计划资助项目(2017YFB0308300)。

摘　　要：为改善对位芳纶纤维水分散性、亲水性,进行对位芳纶纤维磷酸刻蚀改性研究.实验采用超声辅助磷酸刻蚀纤维,对改性前后纤维的水分散性、亲水性、表观形貌、化学结构、结晶结构以及热稳定性进行表征.结果显示:最佳处理条件得到的对位芳纶纤维在水介质中可以单根纤维沉降,沉降体积增加了57.14%;改性后的纤维表面出现凹槽刻痕且有分丝现象,同时在纤维表面引入-OH、-COOH等极性基团,O原子含量增加了1.56%;动态接触角为81.2°,比原纤维降低21.7°,对位芳纶纤维的润湿性增强;并且改性后纤维的结晶结构未发生变化,热稳定性良好.In order to improve the water dispersibility and hydrophilicity of para-aramid fiber,the para-aramid fibers were modified by phosphoric acid etching.The experiment used ultrasound-assisted phosphoric acid to etch fibers,and was characterized by water dispersibility,hydrophilicity,apparent morphology,chemical structure,crystal structure and thermal stability of the fibers before and after modification.The experimental results showed that the para-aramid fibers obtained under the optimal treatment conditions could settle in a single fiber shape without flocculating in water;the settlement volume increased by 57.14%;the surface of the modified fiber had grooves and nicks and filament separation;at the same time,the surface of the modified fiber introduces-OH,-COOH and other polar groups,and the content of O atomic increased by 1.56%;the dynamic contact angle result was measured 81.2°,which is 21.7°lower than the original fiber,and the wettability of para-aramid fiber was improved;after the modification,the crystalline structure of the fiber remained unchanged and the thermal stability was good.

关 键 词：对位芳纶纤维 超声 磷酸 亲水改性 

分 类 号：TS722[轻工技术与工程—制浆造纸工程]