氮硼掺杂碳量子点/异氰酸酯型微胶囊复合整理 棉织物及其防紫外线性能  

Effect of isocyanate microcapsules on UV protection of carbon quantum dot finished cotton fabrics

作　　者：帅旗 孙硕 成世杰 张宏伟 左丹英 SHUAI Qi;SUN Shuo;CHENG Shijie;ZHANG Hongwei;ZUO Danying(School of Materials Science and Engineering,Wuhan Textile University,Wuhan,Hubei 430200,China)

机构地区：[1]武汉纺织大学材料科学与工程学院,湖北武汉430200

出　　处：《纺织学报》2023年第8期126-132,共7页Journal of Textile Research

基　　金：湖北省自然科学基金项目(2018CFB267)。

摘　　要：为提高棉织物的防紫外线性能及其耐水洗性能,采用氮硼掺杂碳量子点(BN-CQDs)和异氰酸酯型微胶囊对棉织物进行喷涂-干燥-辗轧-干燥整理,在辗轧过程中微胶囊中芯材异佛尔酮二异氰酸酯与棉织物表面的羟基和碳量子点表面的羟基、羧基或者氨基进行反应,将碳量子点固定于棉织物表面,且微胶囊的壁材聚氨酯形成涂层。对微胶囊的粒径、分散情况、棉织物结构、防紫外线性能及其耐久性进行了表征和检测。结果表明:经过BN-CQDs与异氰酸酯型微胶囊混合溶液整理后的棉织物相较于原织物其紫外线防护系数(UPF)有较大提升,UPF值最高达到36,UVA和UVB透过率低至2.57%和2.29%,比原棉织物的UPF值提高了207.7%;整理后的织物经过水洗20次,其UPF值仍达32,表现出较好的耐水洗性能。Objective Cotton fabrics have the advantages of breathable moisture permeability and comfort,and is widely used for summer clothing.However,cotton fabrics are weak in UV protection.It is known that excessive ultraviolet irradiation,particularly in the summer,causes great harm to the human body,but the common anti-ultraviolet finishing agent is easy to be washed off during laundering.It is necessary to improve the fastness of anti-ultraviolet agents on cotton fabrics.In this research,BN-CQDs and isocyanate microcapsules are used to finish cotton fabric.Method BN-CQDs were fixed to the fabric using microcapsule core material isophorone diisocyanate.In this research,the structure and surface morphology of finished cotton fabric and microcapsules were studied,and characterized by Fourier infrared spectroscopy,three-purpose ultraviolet analyzer and video microscope.In addition,the UV protection factor(UPF)of the finished cotton fabric was measured to examine the effect of the volume proportion of different modified liquid on the UV protection and UV water-resistant properties of the fabric.The moisture permeability of the cotton fabric was tested to study whether the finished fabric was qualified in the moisture permeability.Results Isocyanate group and—NH appeared in the prepared microcapsules at 2257 cm-1 and 3365 cm-1,respectively,while the isocyanate group was stronger in the pure core material and there was no—NH(Fig.1).Isocyanate-type microcapsules showed smooth surface without wrinkles,particle size of about 200 nm and relatively concentrated distribution,core material mass fraction of microcapsules reaches 42%,and encapsulation efficiency is 75%(Fig.2,Fig.3 and Fig.4).As the content of microcapsules in the modified solution increased,the strength of the hydroxyl group in the finished fabric also decreased(Fig.5).The original fabric appeared almost white under ultraviolet lamp,while the cotton fabric after finishing illustrated bright blue fluorescence.The fluorescence of pure BN-CQDs finishing fabric becam

关 键 词：碳量子点 异氰酸酯型微胶囊 棉织物 防紫外线性能 耐水洗性能 

分 类 号：TS195.5[轻工技术与工程—纺织化学与染整工程]