基于SiO_2气凝胶的超疏水功能棉织物的制备及性能研究
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摘要
以甲基三甲氧基硅烷(MTMS)为前驱体,通过溶胶-凝胶反应和常压干燥法实现了二氧化硅(SiO_2)气凝胶的制备;并将SiO_2气凝胶与聚二甲基硅氧烷(PDMS)混合应用到棉织物上,制备了超疏水功能棉织物。分别探讨了制备SiO_2气凝胶和超疏水棉织物的主要影响因素。结果表明,在草酸与MTMS摩尔配合比为1.6×10-4∶1,凝胶化温度为40℃,老化温度为40℃条件下,制备的SiO_2气凝胶具有连续多孔微观粗糙结构,密度为106.4kg/m3,孔隙率达到95.16%。在SiO_2气凝胶用量为4%(wt,质量分数),PDMS用量为4%(wt,质量分数)条件下,整理后棉织物的接触角为156.4°,实现了超疏水性能。
SiO_2 aerogel was prepared via sol-gel method by atmospheric drying using methyltrimethoxylsilane(MTMS)as the precursor.The cotton fabrics were treated by the mixture of SiO_2 aerogel and polydimethylsiloxane(PDMS)to fabricate superhydrophobic cotton fabrics.The predominant factors influencing the preparation of SiO_2 aerogel and superhydrophobic cotton fabrics were discussed,respectively.The results showed that when the mole ratio of oxalic acid to MTMS was 1.6×10-4∶1,the gelling temperature was 40℃ and the aging temperature was 40℃,the prepared SiO_2 aerogel had continuous porous microstructure with the density of 106.4 kg/m3 and the porosity of95.16%.When SiO_2 aerogel dosage was 4 wt%(mass fraction)and PDMS dosage was 4 wt%(mass fraction),the treated cotton fabric showed excellent superhydrophobicity with the water contact angle of 156.4°.
SiO_2 aerogel was prepared via sol-gel method by atmospheric drying using methyltrimethoxylsilane(MTMS)as the precursor.The cotton fabrics were treated by the mixture of SiO_2 aerogel and polydimethylsiloxane(PDMS)to fabricate superhydrophobic cotton fabrics.The predominant factors influencing the preparation of SiO_2 aerogel and superhydrophobic cotton fabrics were discussed,respectively.The results showed that when the mole ratio of oxalic acid to MTMS was 1.6×10-4∶1,the gelling temperature was 40℃ and the aging temperature was 40℃,the prepared SiO_2 aerogel had continuous porous microstructure with the density of 106.4 kg/m3 and the porosity of95.16%.When SiO_2 aerogel dosage was 4 wt%(mass fraction)and PDMS dosage was 4 wt%(mass fraction),the treated cotton fabric showed excellent superhydrophobicity with the water contact angle of 156.4°.
引文
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[11]Li F,Du M,Zheng Q.Dopamine/silica nanoparticle assembled microscale porous structure for versatile superamphiphobic coating[J].ACS Nano,2016,10(2):2910-2921.
[2]潘洪波,汪存东,喻华兵,等.超疏水表面制备及其应用的研究进展[J].化工新型材料,2014,42(7):208-210.
[3]王宗乾,何铠君,吴开明,等.自清洁功能性纺织品研究进展[J].现代纺织技术,2014(1):60-64.
[4]薛朝华,尹伟,贾顺田.纤维基超疏水功能表面制备方法的研究进展[J].纺织学报,2012,33(4):146-152.
[5]李恒,卢珣,吴叔青.超疏水有机硅涂层的制备与性质研究[J].功能材料,2014,45(S2):97-100.
[6]宋圆,许祖勋,张创,等.纳米材料在纺织领域的最新研究进展[J].材料导报,2012,26(5):6-9.
[7]吴国友,余煜玺,程璇,等.甲基三甲氧基硅烷对块状SiO2气凝胶性能和结构的影响[J].硅酸盐学报,2009,37(7):1206-1211.
[8]Kim G S,Hyun S H.Synthesis of window glazing coated with silica aerogel fims via ambient drying[J].Journal of NonCrystalline Solids,2003,320(1/3):125-132.
[9]Jin H,Tian X L,Ikkala O,et al.Preservation of superhydrophobic and superoleophobic properties upon wear damage[J].ACS Applied Materials&Interfaces,2013,5(3):485-488.
[10]Hayase G,Nonomura K,Hasegawa G,et al.Ultralow-density,transparent,superamphiphobic boehmite nanofiber aerogels and their alumina derivatives[J].Chemisty of Material,2015,27(1):3-5.
[11]Li F,Du M,Zheng Q.Dopamine/silica nanoparticle assembled microscale porous structure for versatile superamphiphobic coating[J].ACS Nano,2016,10(2):2910-2921.