Superhydrophobic cotton fabric fabricated by electrostatic assembly of silica nanoparticles and its remarkable buoyancy
Superhydrophobic cotton fabric fabricated by electrostatic assembly of silica nanoparticles and its remarkable buoyancy
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DOI：
10.1016/j.apsusc.2010.04.082
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发表时间：
2010-09
影响因子：
6.7
通讯作者：
Yan Zhao;Yanwei Tang;Xungai Wang;Tong Lin
中科院分区：
文献类型：
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作者：
Yan Zhao;Yanwei Tang;Xungai Wang;Tong Lin
通过在棉纤维上静电逐层组装聚电解质/二氧化硅纳米颗粒多层膜，然后进行氟烷基硅烷处理，使高亲水性棉织物具有超疏水性。纳米二氧化硅包覆纤维的表面形态可以通过控制多层数来定制，从而导致其疏水性的变化。当静态接触角大于150°时，在1层或3层的情况下，织物表现出粘性，接触角迟滞率高（>45°）。对于5层及以上的棉织物，获得了接触角迟滞小于10°的超疏水性。用该超疏水织物制成的微型船对其浮力进行了测试。超疏水织物船具有显著的承载能力；对于容积为8.0cm3的船，如果算上船重，最大装载量为11.6 g或12.2g。此外，超疏水性棉织物显示出合理的耐久性，可以承受至少30次机洗循环。
Highly hydrophilic cotton fabrics were rendered superhydrophobic via electrostatic layer-by-layer assembly of polyelectrolyte/silica nanoparticle multilayers on cotton fibers, followed with a fluoroalkylsilane treatment. The surface morphology of the silica nanoparticle-coated fibers, which results in the variety of the hydrophobicity, can be tailored by controlling the multilayer number. Although with the static contact angle larger than 150°, in the case of 1 or 3 multilayers, the fabrics showed sticky property with a high contact angle hysteresis (>45°). For the cotton fabrics assembled with 5 multilayers or more, slippery superhydrophobicity with a contact angle hysteresis lower than 10° was achieved. The buoyancy of the superhydrophobic fabric was examined by using a miniature boat made with the fabric. The superhydrophobic fabric boat exhibited a remarkable loading capacity; for a boat with a volume of 8.0cm3, the maximum loading was 11.6 or 12.2g when the boat weight is included. Moreover, the superhydrophobic cotton fabric showed a reasonable durability to withstand at least 30 machine washing cycles.