反应性聚硅氧烷纳米颗粒的制备及超疏水表面的构筑
发布时间：2018-11-12 13:15
【摘要】：聚硅氧烷纳米颗粒具有良好的耐热性、耐候性、生理惰性和疏水性等优良特性,在很多领域被广泛应用。本研究以烷氧基硅烷作为前驱体,在醇或水体系,催化剂的作用下,通过溶胶-凝胶法和乳液法制备聚硅氧烷纳米颗粒,并将其负载于棉织物表面,制备超疏水棉织物。向体系中引入γ-(2,3环氧丙氧)丙基三甲氧基硅烷(GPTMS),制备环氧基化的聚硅氧烷纳米颗粒。利用环氧基和基材表面羟基共价结合,提高超疏水表面的疏水耐久性。基于此,本课题主要开展以下两方面工作:(1)以甲基三甲氧基硅烷(MTMS)、丙基三甲氧基硅烷(PTMS)、GPTMS为前驱体,异丙醇为溶剂,通过溶胶-凝胶法制备聚丙基甲基环氧基硅氧烷(PPMGSQ)溶胶。向PPMGSQ溶胶中加入非溶剂水,获得相分离的PPMGSQ溶胶。通过浸-烘将其负载于棉织物,制备具有一定疏水耐久性的超疏水棉织物。采用扫描电子显微镜观察棉织物的表面形貌,视频光学接触角测量仪检测棉织物的润湿性能;探索前驱体用量对棉织物疏水性的影响规律;研究加水引发相分离的PPMGSQ溶胶对负载后棉织物表面形貌的变化规律;通过摩擦、洗涤考察超疏水棉织物的疏水稳定性,建立具有较好耐用性的PPMGSQ相分离溶胶处理棉织物的制备方法。结果表明,向PPMGSQ溶胶中加入适量的水,获得稳定的相分离PPMGSQ溶胶,处理的棉织物接触角高达161°。经过800次机械摩擦和10次家庭洗涤后,棉织物的接触角降低到141°和145°,具有一定的疏水耐摩擦性和耐洗涤性。(2)以PTMS为前驱体,十六烷基三甲氧基硅烷(HDTMS)和GPTMS为改性剂,通过水体系乳液法制备聚丙基十六烷基环氧基硅氧烷(PPHGSQ)纳米颗粒。考查搅拌速度,表面活性剂用量、氨水用量和改性剂用量对乳液稳定性以及聚硅氧烷纳米颗粒粒径的影响。采用浸轧方式将聚硅氧烷纳米颗粒负载于棉织物表面,获得具有良好超疏水性的棉织物。通过扫描电子显微镜观察棉织物的表面形貌,并对纤维表面进行能谱分析;考察摩擦、洗涤对棉织物疏水稳定性的影响,建立具有较好耐用性的PPHGSQ纳米颗粒处理棉织物的制备方法。研究发现,使用最优工艺制备的聚硅氧烷纳米颗粒处理的棉织物接触角为164.5°。经800次机械摩擦和10次家庭洗涤后,接触角为135°和155°。
[Abstract]:Polysiloxane nanoparticles have been widely used in many fields because of their good heat resistance, weather resistance, physiological inertia and hydrophobicity. In this study, polysiloxane nanoparticles were prepared by sol-gel method and emulsion method using alkoxy silane as precursor, under the action of alcohol or water system and catalyst, and loaded on the surface of cotton fabric to prepare super hydrophobic cotton fabric. The epoxy polysiloxane nanoparticles were prepared by introducing 纬-(2o 3 epoxy propyl) propyl trimethoxysilane (GPTMS),) into the system. The hydrophobic durability of superhydrophobic surface was improved by covalent combination of epoxy and hydroxyl groups. Based on this, the main work of this paper is as follows: (1) using methyltrimethoxysilane (MTMS),) propyl trimethoxysilane (PTMS), GPTMS) as precursor, isopropanol as solvent, Polypropyl methyl epoxy siloxane (PPMGSQ) sol was prepared by sol-gel method. Non-solvent water was added to PPMGSQ sol to obtain phase separation PPMGSQ sol. A super hydrophobic cotton fabric with a certain hydrophobic durability was prepared by impregnating it with cotton fabric. The surface morphology of cotton fabric was observed by scanning electron microscope (SEM), the wettability of cotton fabric was detected by video optical contact angle measuring instrument, and the influence of precursor content on the hydrophobicity of cotton fabric was explored. The changes of surface morphology of cotton fabric after loading with PPMGSQ sol with water initiator phase separation were studied. The hydrophobic stability of super hydrophobic cotton fabric was investigated by friction and washing, and the preparation method of PPMGSQ phase separation sol was established. The results showed that stable phase separation PPMGSQ sol was obtained by adding proper amount of water to PPMGSQ sol, and the contact angle of treated cotton fabric was as high as 161 掳. After 800 times of mechanical friction and 10 times of home washing, the contact angle of cotton fabric was reduced to 141 掳and 145 掳, and the cotton fabric had hydrophobic friction resistance and washing resistance. (2) PTMS was used as precursor. Cetyltrimethoxysilane (HDTMS) and GPTMS were used as modifiers to prepare (PPHGSQ) nanoparticles by water emulsion method. The effects of stirring rate, surfactant, ammonia and modifier on emulsion stability and particle size of polysiloxane nanoparticles were investigated. The polysiloxane nanoparticles were loaded on the surface of cotton fabric by impregnation and rolling, and the cotton fabric with good hydrophobicity was obtained. The surface morphology of cotton fabric was observed by scanning electron microscope (SEM), and the fiber surface was analyzed by energy dispersive spectroscopy (EDS). The effect of friction and washing on the hydrophobic stability of cotton fabric was investigated and the preparation method of cotton fabric treated with PPHGSQ nanoparticles with good durability was established. It was found that the contact angle of cotton fabric treated with polysiloxane nanoparticles was 164.5 掳. After 800 times of mechanical friction and 10 times of home washing, the contact angles were 135 掳and 155 掳.
【学位授予单位】：陕西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TS195.5;TB383.1
本文编号：2327221
[Abstract]:Polysiloxane nanoparticles have been widely used in many fields because of their good heat resistance, weather resistance, physiological inertia and hydrophobicity. In this study, polysiloxane nanoparticles were prepared by sol-gel method and emulsion method using alkoxy silane as precursor, under the action of alcohol or water system and catalyst, and loaded on the surface of cotton fabric to prepare super hydrophobic cotton fabric. The epoxy polysiloxane nanoparticles were prepared by introducing 纬-(2o 3 epoxy propyl) propyl trimethoxysilane (GPTMS),) into the system. The hydrophobic durability of superhydrophobic surface was improved by covalent combination of epoxy and hydroxyl groups. Based on this, the main work of this paper is as follows: (1) using methyltrimethoxysilane (MTMS),) propyl trimethoxysilane (PTMS), GPTMS) as precursor, isopropanol as solvent, Polypropyl methyl epoxy siloxane (PPMGSQ) sol was prepared by sol-gel method. Non-solvent water was added to PPMGSQ sol to obtain phase separation PPMGSQ sol. A super hydrophobic cotton fabric with a certain hydrophobic durability was prepared by impregnating it with cotton fabric. The surface morphology of cotton fabric was observed by scanning electron microscope (SEM), the wettability of cotton fabric was detected by video optical contact angle measuring instrument, and the influence of precursor content on the hydrophobicity of cotton fabric was explored. The changes of surface morphology of cotton fabric after loading with PPMGSQ sol with water initiator phase separation were studied. The hydrophobic stability of super hydrophobic cotton fabric was investigated by friction and washing, and the preparation method of PPMGSQ phase separation sol was established. The results showed that stable phase separation PPMGSQ sol was obtained by adding proper amount of water to PPMGSQ sol, and the contact angle of treated cotton fabric was as high as 161 掳. After 800 times of mechanical friction and 10 times of home washing, the contact angle of cotton fabric was reduced to 141 掳and 145 掳, and the cotton fabric had hydrophobic friction resistance and washing resistance. (2) PTMS was used as precursor. Cetyltrimethoxysilane (HDTMS) and GPTMS were used as modifiers to prepare (PPHGSQ) nanoparticles by water emulsion method. The effects of stirring rate, surfactant, ammonia and modifier on emulsion stability and particle size of polysiloxane nanoparticles were investigated. The polysiloxane nanoparticles were loaded on the surface of cotton fabric by impregnation and rolling, and the cotton fabric with good hydrophobicity was obtained. The surface morphology of cotton fabric was observed by scanning electron microscope (SEM), and the fiber surface was analyzed by energy dispersive spectroscopy (EDS). The effect of friction and washing on the hydrophobic stability of cotton fabric was investigated and the preparation method of cotton fabric treated with PPHGSQ nanoparticles with good durability was established. It was found that the contact angle of cotton fabric treated with polysiloxane nanoparticles was 164.5 掳. After 800 times of mechanical friction and 10 times of home washing, the contact angles were 135 掳and 155 掳.
【学位授予单位】：陕西科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TS195.5;TB383.1
【参考文献】
相关期刊论文 前5条
1 贺惠蓉;马养民;胡亚微;杨秀芳;;溶胶凝胶法制备TiO_2薄膜及其润湿性研究[J];表面技术;2012年04期
2 柯清平;李广录;郝天歌;何涛;李雪梅;;超疏水模型及其机理[J];化学进展;2010年Z1期
3 叶金兴;;具有荷叶效应的超疏水纺织物[J];现代纺织技术;2010年02期
4 高雪峰;江雷;;天然超疏水生物表面研究的新进展[J];物理;2006年07期
5 薛朝华;贾顺田;张静;;二氧化钛溶胶-凝胶法制备含氟超疏水棉织物[J];印染;2009年23期
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