以3-缩水甘油醚氧丙基三甲氧基硅烷(KH560)、聚十二烷基/甲基倍半硅氧烷(PDMSQ)纳米球乳液和交联型氨基硅乳(JASO)为构筑基元,选用棉织物作为基质,通过层层自组装技术制备了一种耐久性超疏水涂层。通过单因素实验对工艺条件进行了优化,通过X射线光电子能谱仪、场发射扫描电子显微镜(FESEM)对织物表面超疏水涂层的化学组成和微观形貌进行了分析。结果表明,制备的超疏水涂层符合预期设想;当KH560质量分数为1%、PDMSQ纳米球乳液固含量为2%、JASO乳液固含量为1%时,超疏水涂层水静态接触角(WCA)达160.8°。超疏水涂层经皂洗25次后,WCA仍为144.6°。FESEM分析表明,PDMSQ纳米球均匀地附着在棉织物纤维表面,与棉织物纤维本身的微米级结构协同形成了微/纳米级粗糙结构,为构筑超疏水织物提供了有利条件,成功制备了耐久性超疏水涂层。
A durable superhydrophobic coating was fabricated via LBL self-assembly technology with 3-glycidyl oxypropyl trimethoxysilane (KH560),poly dodecyl/methylsilsesquioxane (PDMSQ) latex and crosslinked aminopolysiloxane (JASO) latex as building units,cotton fabrics as film-forming substrates.Finally,the application process were optimized by single factor experiments.The chemical composition and microscopic morphology of the fabric surface was analyzed by XPS and FESEM.Results shown that the as-prepared coating had an expected structure.Superhydrophobicity of the treated fabric was the best with static water contact angles (WCA) of 160.8° while the mass fraction of KH560,the solid contents of PDMSQ and JASO latexes were 1%,2%,and 1%,respectively.WCA could still reach 144.6°after 25 soaping cycles.FESEM results indicated that PDMSQ were evenly adsorbed on the cotton fabric surface and created a micro/nano dual scaled roughness in combination with micro-scaled roughness of cotton fibers itself,which finally provided favorable conditions for the construction of the superhydrophobic fabric and successfully prepared durable superhydrophobic coating.
[1] 屈孟男,侯琳刚,何金梅,等.功能化超疏水材料的研究与发展[J].化学进展,2016,28(12):1774-1787.
[2] Yang Hui,Gao Hongfang.Preparation and characterization of superhydrophobic coatings with silica/polyvinylsilsesquioxane[J].Polymer Materials Science and Engineering,2016,32(11):130-134.
[3] 郝丽芬,张娜,尹娟娟,等.皮革表面聚倍半硅氧烷纳米杂化超疏水涂层的制备与性能[J].皮革与化工,2017,34(2):1-5.
[4] 卢茜,胡英成.层层自组装SiO2/木材复合材料的超疏水性及其形成机制[J].功能材料,2016,47(7):7109-7113.
[5] Fan Q Q,Ma J Z,Xu Q N,et al.Multifunctional coatings crafted via layer-by-layer spraying method[J].Progress in Organic Coatings,2018,125:215-221.
[6] 余光华,赵启航,黄婵娟,等.PH可控PVAm-g-PBA/PVA层层自组装在纤维素膜上的应用[J].精细化工,2019,36(2):218-224.
[7] 郝丽芬,裴萌萌,王学川,等.长链烷基聚甲基倍半硅氧烷纳米杂化乳液的合成与微观形态[J].化工新型材料,2018,46(11):142-145.
[8] 高婷婷.聚倍半硅氧烷纳米杂化超疏水皮革涂膜的构筑与性能[D].西安:陕西科技大学,2017.
[9] 赵洁.功能性聚倍半硅氧烷及其杂化聚合物的合成与应用基础研究[D].西安:陕西科技大学,2015.
[10] Cheng Q Y,Guan C S,Wang M,et al.Cellulose nanocrystal coated cotton fabric with superhydrophobicity for efficient oil/water separation[J].Carbohydrate Polymers,2018,199:390-396.
[11] Guo Chaowei,Wang Shutao,Liu Huan,et al.Wettability alteration of polymer surfaces produced by scraping[J].Journal of Adhesion Science and Technology,2008,22(3/4):395-402.
[12] Naomi K,Kanji M,Makoto K.Recovery of scratch deformation formed on crosslinked polyorganosiloxane films[J].Progress in Organic Coatings,2019,127:124-130.
[13] 杨锐妮.耐久性纳米杂化超疏水织物涂层的组装与性能[D].西安:陕西科技大学,2018.
