SiO2-g-PS/fluoroalkylsilane composites for superhydrophobic and highly oleophobic coatings
SiO2-g-PS/fluoroalkylsilane composites for superhydrophobic and highly oleophobic coatings
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用于超疏水和高疏油涂层的 SiO2-g-PS/氟烷基硅烷复合材料
DOI：
10.1016/j.colsurfa.2016.07.056
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发表时间：
2016-10-20
影响因子：
5.2
通讯作者：
He Ling
中科院分区：
文献类型：
--
作者：
Liang Junyan;Wang Li;He Ling
制备烯基官能化 SiO2 颗粒 (AFSP)，与氟烷基硅烷接枝并共铸，以生产超疏水和高疏油涂层。在AFSPs的制备中，分别采用乙烯基三甲氧基硅烷(VTMS)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(MPTMS)通过异位中性缩合与SiO2纳米颗粒(NPs)反应。相比之下，MPTMS 与 SiO2 NP 的反应也是通过原位碱催化溶胶-凝胶技术进行的。结果表明，所获得的中性缩合VTMS-SiO2和MPTMS-SiO2 NPs的表面分别具有薄的VTMS和MPTMS接枝层，而碱催化的MPTMS-SiO2 NPs的表面具有稍厚的MPTMS水解产物-缩合物层。将聚苯乙烯（PS）接枝到 AFSP 上，通过这三种 AFSP 中苯乙烯（St）的乳液聚合来制备 SiO2-g-PS 颗粒。均匀的 SiO2-g-PS 颗粒完全是通过从中性凝聚的 MPTMS-SiO2 NP 中生长 PS 来获得的。随后通过在均匀的 SiO2-g-PS 颗粒悬浮液中原位水解 1H、1H、2H、2H-全氟癸基三乙氧基硅烷 (FDTES) 制备了用于涂层的 SiO2-g-PS/氟烷基硅烷复合材料。研究发现，使用较小的 SiO2-g-PS 颗粒和高含量 FDTES 有助于形成具有低附着力的超疏水性和高附着力的高疏油性涂层。 (C) 2016 Elsevier B.V. 保留所有权利。
Alkenyl-functionalized SiO2 particles (AFSPs) were prepared, grafted and co-cast with fluoroalkylsilane to produce superhydrophobic and highly oleophobic coatings. In preparation of AFSPs, vinyltrimethoxysilane (VTMS) and gamma-methacryloxypropyltrimethoxysilane (MPTMS) were employed separately to react with SiO2 nanoparticles (NPs) through the ex situ neutral condensation. In contrast, the reaction of MPTMS with SiO2 NPs was also executed through the in situ alkali-catalyzed sol-gel technique. It showed that the obtained neutral condensed VTMS-SiO2 and MPTMS-SiO2 NPs had a surface with a thin grafted layer of VTMS and MPTMS, respectively, whereas the alkali-catalyzed MPTMS-SiO2 NPs had a surface bearing a slightly thicker MPTMS hydrolysate-condensate layer. Polystyrene (PS) was allowed to graft onto the AFSPs to prepare SiO2-g-PS particles via emulsion polymerization of styrene (St) from each of these three AFSPs. The uniform SiO2-g-PS particles were obtained exclusively by the growth of PS from neutral condensed MPTMS-SiO2 NPs. SiO2-g-PS/fluoroalkylsilane composites for coating were subsequently prepared by the in situ hydrolysis of 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (FDTES) in the suspension of uniform SiO2-g-PS particles. It was found that the use of smaller SiO2-g-PS particles and high-content FDTES contributed to the creation of a coating that exhibited superhydrophobicity with low adhesion and high oleophobicity with high adhesion. (C) 2016 Elsevier B.V. All rights reserved.