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摘要
以棉织物为基底,利用纤维素纳米晶(CNC)构建微观粗糙结构,并使用聚二甲基硅氧烷(PDMS)进行低表面能改性,制备了超疏水CNC/PDMS@棉织物。通过傅里叶变换红外光谱仪、扫描电子显微镜、能量色散谱仪、接触角测量仪对CNC/PDMS@棉织物的结构、表面形貌、化学组成及水接触角进行表征和测量,研究了CNC和PDMS含量对CNC/PDMS@棉织物疏水性能的影响。结果表明:CNC/PDMS@棉织物表面具有明显的微观粗糙结构,有利于超疏水表面的构建;当PDMS质量分数为4％,CNC质量分数为4.5%时,CNC/PDMS@棉织物的水接触角可达156.7°;砂纸摩擦20次后,CNC/PDMS@棉织物水接触角仍超过150°,CNC/PDMS@棉织物具有优异的自清洁、拒水抗污性能及良好的耐磨性。
Abstract
Superhydrophobic CNC/PDMS@cotton fabrics were prepared using cotton fabrics as a substrate by constructing a microscopic rough structure using cellulose nanocrystals (CNC) and low surface energy modification using polydimethylsiloxane (PDMS).The structure,surface morphology,chemical composition and water contact angle of CNC/PDMS@cotton fabrics were characterised and measured by Fourier transform infrared spectroscopy,scanning electron microscopy,energy dispersive spectrometry,and contact angle measurement,and the effects of CNC and PDMS contents on the hydrophobicity of CNC/PDMS@cotton fabrics were investigated.The results showed that the surface of CNC/PDMS@cotton fabric had an obvious microscopic rough structure,which was conducive to the construction of superhydrophobic surfaces.When the mass fraction of PDMS was 4% and the mass fraction of CNC was 4.5%,the water contact angle of CNC/PDMS@cotton fabric was 156.7°.After 20 times of sandpaper rubbing,the water contact angle of CNC/PDMS@cotton fabric remained above 150°,and CNC/PDMS@cotton fabrics had excellent self-cleaning,water-repellent and dirt-repellent properties and good abrasion resistance.
关键词
纤维素纳米晶
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超疏水
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微观粗糙结构
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低表面能
Key words
cellulose nanocrystals
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superhydrophobic
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microscopic rough structure
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low surface energy
基于纤维素纳米晶的超疏水棉织物的制备及其性能研究[J].
化工新型材料, 2024, 52(12): 283-286 DOI:10.19817/j.cnki.issn1006-3536.2024.12.005
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基金资助
上海市自然科学基金面上项目(21ZR1426200);国家自然科学基金(51703123);国家先进印染技术创新中心科研基金(2022GCJJ22)
