摘要
采用简单的浸涂法制备具有优异自清洁性能和良好耐久性能的超疏水涂层。基于纤维素纳米纤维(CNF)与低表面能物质聚二甲基硅氧烷(PDMS),以棉织物为基底制备了超疏水涂层,实现了棉织物表面功能化。通过单因素实验分别研究不同浓度CNF以及不同浓度PDMS对涂层疏水性的影响,并采用红外光谱(FT-IR)、扫描电子显微镜(SEM)、热重分析(TGA)等对超疏水涂层进行了测试表征。CNF和PDMS在棉织物表面牢固结合,成功制备了耐久超疏水涂层。SEM结果显示,与纯PDMS涂层相比,CNF构筑了超疏水涂层所需的微观粗糙结构,为超疏水涂层的制备提供了有利条件。当PDMS浓度为4%,CNF浓度为4%时,超疏水涂层的水滴接触角(WCA)达159.2°,水滴滚动角(WSA)为4.3°。耐摩擦测试结果显示,经过40次砂纸摩擦之后涂层的水滴接触角仍达150.3°,具有超疏水性能,说明PDMS为涂层提供低表面能的同时,也具有良好的粘结性能进而提高了涂层的耐久性能。采用CNF和PDMS在棉织物表面成功制备了耐久超疏水涂层,同时实现了优异的自清洁、防水抗污性能,并且具有良好的耐久性能。
The work aims to prepare the superhydrophobic coatings with excellent self-cleaning performance and good durability by a simple dip-coating.The superhydrophobic coatings were prepared based on cellulose nanofibers(CNF)and low surface energy polydimethylsiloxane(PDMS)to achieve the surface functionalization of cotton fabrics.The effect of different contents of polydimethylsiloxane and CNF on hydrophobicity of coatings was studied by single factor experiments.And the superhydrophobic coatings were characterized by Fourier transform infrared spectrometer(FT-IR),scanning electron microscope(SEM)and thermal gravimetric analyze(TGA).The results showed that durable superhydrophobic coatings were successfully prepared by cellulose nanofibers and polydimethylsiloxane.The SEM results showed that CNF constructed the microrough structure required for the superhydrophobic coating as compared to the pure PDMS coating,and provided favorable conditions for the preparation of the superhydrophobic coatings.With 4wt%PDMS and 4wt%CNF,the superhydrophobic coating showed water contact angle of 159.2°,and the water sliding angle of 4.3°.The results showed that the water contact angle of superhydrophobic coating still kept 150.3°even after 40 cycles of sandpaper friction,and it still had superhydrophobic performance.It was indicated that the polydimethylsiloxane provided low surface energy for the coatings,and had good bonding performance which improved the coatings'durability.In conclusion,a durable superhydrophobic coating was successfully prepared on cotton fabric surfaces with CNF and PDMS,while achieving excellent self-cleaning,waterproof and pollution resistance performance and good durability.
作者
李可婷
徐丽慧
潘虹
沈勇
徐伟
柳杨春
李俊
LI Keting;XU Lihui;PAN Hong;SHEN Yong;XU Wei;LIU Yangchun;LI Jun(School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第7期7215-7221,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(51703123)
上海市自然科学基金项目面上项目(21ZR1426200)。
关键词
纤维素纳米纤维
超疏水
表面
粗糙结构
耐久性
cellulosenanofiber
superhydrophobic
surface
microstructure roughness
durability
