PDA/DTMS-纳米TiO_(2)对蚕丝织物自修复超疏水整理  

Self-repairing superhydrophobic finishing of silk fabric by PDA/DTMS-nanoTiO_(2)

作　　者：李丽丽 金海军 杨文菊 唐雨霞 王浩[1] LI Lili;JIN Haijun;YANG Wenju;TANG Yuxia;WANG Hao(College of Textile Engineering and Art,Anhui Agricultural University,Hefei 230036,Anhui,China)

机构地区：[1]安徽农业大学轻纺工程与艺术学院,安徽合肥230036

出　　处：《精细化工》2023年第4期911-919,928,共10页Fine Chemicals

基　　金：科技部“科技助力经济2020”重点专项项目(国科发资[2020]151号);安徽省科技重大专项(202103a06020005)。

摘　　要：为了赋予蚕丝织物自清洁与防污性能,首先利用多巴胺(DA)在CuSO4/H_(2)O_(2)氧化体系下快速聚合形成聚多巴胺(PDA)沉积在蚕丝织物表面,再通过十二烷基三甲氧基硅烷(DTMS)改性的纳米TiO_(2)对沉积PDA的织物进行超疏水功能整理。通过FTIR、SEM、XPS、接触角测量仪对改性前后蚕丝织物的化学组成、表面微观结构、疏水性能进行表征,测试了改性蚕丝织物的自清洁与防污性、疏水自修复性和抗紫外线性能。结果表明,PDA/DTMS-纳米TiO_(2)改性蚕丝织物表面具有分布均匀的微纳结构,且与原蚕丝织物相比,织物表面自由能下降;其水接触角为156°、滚动角为5°,防紫外线系数(UPF)为75.81,具有良好的防污自清洁能力和抗紫外线性能,与原蚕丝织物相比透气性略有下降;经O_(2)等离子体10次的刻蚀-修复循环或1200次机械磨损-修复循环后,蚕丝织物的疏水修复率均>96%,耐环境损伤的自修复效果明显。此外,洗涤25次后,PDA/DTMS-纳米TiO_(2)改性蚕丝织物接触角为151°、UPF为49.5,具有较为优异的耐洗牢度。To gain self-cleaning and anti-fouling properties,silk fabric surface was firstly coated with polydopamine(PDA),prepared by polymerization of dopamine(DA)under CuSO4/H_(2)O_(2) oxidation system,and then superhydrophobically functionalized by dodecyltrimethoxysilane(DTMS)modified nanoTiO_(2).The chemical composition,surface microstructure,and hydrophobic properties of silk fabrics before and after modification were further characterized by FTIR,SEM,XPS,water contact angle measuring instrument,followed by investigation on the performance of modified silk fabric in the aspects of self-cleaning,anti-fouling,self-repairing of hydrophobicity and UV resistance.The results showed that the silk fabric modified with PDA/DTMS-nanoTiO_(2) exhibited uniform micro and nano structure,as well as decreased surface free energy.The contact angle and rolling angle of modified silk fabric was 156°and 5°,respectively,while the UV protection factor(UPF)was 75.81,indicating good anti-fouling self-cleaning ability and UV resistance,compared to original silk fabric.The silk fabric after modification displayed a slight decrease in gas permeation.After 10 etching-repair cycles of O_(2) plasma or 1200 mechanical wear-repair cycles,the hydrophobic repair rate of the modified fabrics still remained>96%,demonstrating good self-healing capacity from environmental damage.In addition,the modified silk fabric still retained relatively excellent washing fastness after 25 washes,with a contact angle of 151°and UPF of 49.5.

关 键 词：蚕丝织物 多巴胺 纳米TiO_(2) 超疏水性 自修复 抗紫外线 纺织染整助剂 

分 类 号：TS195.6[轻工技术与工程—纺织化学与染整工程]