CN105350282A - 一种无氟超疏水棉织物的制备方法 - Google Patents
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Abstract
本发明公开了一种无氟超疏水棉织物及其制备方法,属于纺织品功能整理加工领域。先采用纳米二氧化钛溶胶对棉织物进行轧-烘-焙整理,以提高织物表面的粗糙度,然后采用低表面能物质-熔融蜡质对织物进行疏水化改性,所制备的棉织物与水滴的接触角超过150°,该方法利用棉纤维的羟基与纳米TiO2水溶胶中的羟基之间的化学反应使得所构筑的粗糙表面具有良好的坚牢度,通过仿生荷叶表面的结构特征,采用熔融蜡质在氧化物的粗糙表面固化结晶而进行有机修饰,不仅可以达到超疏水的效果,而且可以避免引入含氟有机修饰剂,以及其他有机溶剂或者表面活性剂对织物疏水性能的影响,因此使所制备的织物的超疏水性能具有优良的稳定性。
Description
技术领域
本发明属于纺织品拒水功能整理加工领域,具体涉及一种无氟超疏水棉织物及其制备方法。
背景技术
超疏水表面具有特殊的浸润性,即水滴在物体表面的接触角大于150°,并在其表面自由滚动,具有“荷叶自清洁效应”,水滴在滚动过程中会将表面上的污物一同带走。而具有自清洁功能的超疏水纺织品在工业生产、医疗、军用产品及日常生活中具有广泛的应用。
自从荷叶表面的微纳米凸起结构被发现以来,人们在制备超疏水表面时多采用仿制荷叶表面的结构特点,构建微纳米级粗糙度,再进行有机物改性修饰。为了制备超疏水面料,中国专利CN1242114C公开了纳米自清洁羊绒或制品及其制备方法,中国专利CN1277019C公开了纳米自清洁真丝绸及制品,中国专利CN1824884A公开了含有纳米功能性材料的自清洁西服面料及成衣的制法,中国专利CN100334291C公开了具有自清洁功能的羽绒服面料的制备方法,这些专利首先在织物上构建纳米微粒的粗糙结构,然后采用有机氟类整理剂对织物改性修饰,赋予了织物既疏水又疏油的性能,但是大多有机氟材料不仅价格高而且对环境有害。中国专利CN101768854A公开了一种无氟超疏水防紫外棉织物的制备方法,该方法采用二氧化钛溶胶浸轧棉织物,再经有机硅氧烷或硬脂酸处理获得超疏水棉织物。但是中国专利CN101768854A所公开的方法中,二氧化钛溶胶的制备需要大量的有机溶剂乙醇,并且在进行非氟代有机物修饰时,也需要有机溶剂乙醇、丙酮,或者乳化剂等,这些溶剂或助剂的加入不仅增加成本和影响环境,而且残留在织物上会降低疏水的效果。因此,有必要开发一种更加简单有效的方法,来进行微纳米材料表面的有机修饰以获得超疏水性能。
发明内容
本发明的目的是提供一种无氟超疏水棉织物及其制备方法,利用石蜡或者白蜡固体受热融化的特点,在不用有机溶剂的条件下,对微纳米材料表面进行有机修饰以获得超疏水性能。
为达到上述目的,本发明采用以下技术方案:
采用质量浓度为0.1%-1.5%的纳米TiO2水溶胶对棉织物进行轧-烘-焙整理,以提高纤维表面的粗糙度,然后通过加热熔融的方法将固体石蜡或白蜡转移到TiO2水溶胶处理过的棉织物表面,以获得超疏水棉织物。
所述的纳米TiO2水溶胶的制备步骤为:
(1)将15-25mL冰乙酸与200-250mL蒸馏水混合均匀,记为A溶液;
(2)将40-70g钛酸丁酯与15-25mL冰乙酸混合均匀,记为B溶液;
(3)把A溶液置于冰浴中,将B溶液逐滴加入到A溶液中,并电动搅拌1-3h,然后静置分层,下层半透明液体即为TiO2水溶胶;
(4)用蒸馏水将TiO2水溶胶中二氧化钛的质量浓度稀释为0.1%-1.5%。
所述的纳米TiO2水溶胶对棉织物的轧-烘-焙整理方法为:采用二浸二轧法,将棉织物浸渍于质量浓度为0.1%-1.5%纳米TiO2水溶胶中5-20分钟,采用轧车轧去多余的溶胶,轧余率控制为60%wt-80%wt,将棉织物先于60-80℃烘干,然后在120-160℃焙烘1-10min。
所述的通过加热熔融将固体石蜡或白蜡转移到TiO2水溶胶处理过的棉织物表面的方法为:将固体石蜡或白蜡先涂在纸上制成蜡纸,然后将蜡纸与TiO2水溶胶处理过的棉织物表面相接触,加热温度在100-150℃,将蜡纸上的蜡热压到棉织物上,然后自然冷却或急速冷冻,使蜡质在棉织物表面结晶固化。
本发明的有益效果:按照本发明制备的无氟超疏水棉织物,与水滴的接触角超过150°,具有荷叶般的超疏水性能和自清洁功能。该方法利用棉纤维的羟基与纳米TiO2水溶胶中的羟基之间的化学反应使得所构筑的粗糙表面具有良好的坚牢度,通过仿生荷叶表面的结构特征,采用熔融蜡质在氧化物的粗糙表面固化结晶而进行有机修饰,不仅可以达到超疏水的效果,而且可以避免引入含氟有机修饰剂,以及其他有机溶剂或者表面活性剂对织物疏水性能的影响,因此使所制备的织物的超疏水性能具有优良的稳定性。
附图说明
图1是水滴在无氟超疏水棉织物表面上的接触角照片。
具体实施方式
实施例1
本实施例的无氟超疏水棉织物的制备方法,步骤如下:
将19mL冰乙酸与235mL蒸馏水混合均匀,记为A溶液;将60g钛酸丁酯与19mL冰乙酸混合均匀,记为B溶液;把A溶液置于冰浴中,将B溶液逐滴加入到A溶液中,并电动搅拌2h,然后静置分层,下层半透明液体即为TiO2水溶胶。用蒸馏水将TiO2水溶胶稀释为0.5%。将棉织物浸渍于质量浓度为0.5%纳米TiO2溶胶中5分钟,采用二浸二轧法,轧余率控制为70%,将浸轧过纳米TiO2溶胶的棉织物先于80℃烘干,然后在140℃焙烘3min。将固体石蜡先涂在纸上制成蜡纸,然后将蜡纸与TiO2溶胶处理过的棉织物表面相接触,通过加热熔融法,将蜡纸上的蜡热转移到棉织物上,然后自然冷却,使蜡质在棉织物表面结晶固化,以获得超疏水棉织物。
实施例2
本实施例的无氟超疏水棉织物的制备方法,步骤如下:
将19mL冰乙酸与235mL蒸馏水混合均匀,记为A溶液;将60g钛酸丁酯与19mL冰乙酸混合,记为B溶液;把A溶液置于冰浴中,将B溶液逐滴加入到A溶液中,并电动搅拌2h,然后静置分层,下层半透明液体即为TiO2水溶胶。用蒸馏水将TiO2水溶胶稀释为1%。将棉织物浸渍于质量浓度为1%纳米TiO2溶胶中5分钟,采用二浸二轧法,轧余率控制为70%,将浸轧过纳米TiO2溶胶的棉织物先于80℃烘干,然后在140℃焙烘3min。将固体白蜡先涂在纸上制成蜡纸,然后将蜡纸与TiO2溶胶处理过的棉织物表面相接触,通过加热熔融法,将蜡纸上的蜡热压到棉织物上,然后自然冷却,使蜡质在棉织物表面结晶固化,以获得超疏水棉织物。
实施例3
本实施例的无氟超疏水棉织物的制备方法,步骤如下:
将19mL冰乙酸与235mL蒸馏水混合均匀,记为A溶液;将60g钛酸丁酯与19mL冰乙酸混合,记为B溶液;把A溶液置于冰浴中,将B溶液逐滴加入到A溶液中,并电动搅拌3h,然后静置分层,下层半透明液体即为TiO2水溶胶。用蒸馏水将TiO2水溶胶稀释为1%。将棉织物浸渍于质量浓度为1%纳米TiO2溶胶中10分钟,采用二浸二轧法,轧余率控制为80%,将浸轧过纳米TiO2溶胶的棉织物先于70℃烘干,然后在140℃焙烘5min。将固体石蜡涂在纸上制成蜡纸,然后将蜡纸与TiO2溶胶处理过的棉织物表面相接触,通过加热熔融法,将蜡纸上的蜡热压到棉织物上,然后自然冷却,使蜡质在棉织物表面结晶固化,以获得超疏水棉织物。
以上显示和描述了本发明的基本原理和主要特征以及本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。
Claims (5)
1.一种无氟超疏水棉织物的制备方法,其特征在于:采用质量浓度为0.1%-1.5%的纳米TiO2水溶胶对棉织物进行轧-烘-焙整理,以提高纤维表面的粗糙度,然后通过加热熔融的方法将固体石蜡或白蜡转移到TiO2水溶胶处理过的棉织物表面。
2.根据权利要求1所述的无氟超疏水棉织物的制备方法,其特征在于:所述的纳米TiO2水溶胶的制备步骤为:
(1)将15-25mL冰乙酸与200-250mL蒸馏水混合均匀,记为A溶液;
(2)将40-70g钛酸丁酯与15-25mL冰乙酸混合,并磁力搅拌,记为B溶液;
(3)把A溶液置于冰浴中,将B溶液逐滴加入到A溶液中,并电动搅拌1-3h,然后静置分层,下层半透明液体即为TiO2水溶胶;
(4)将TiO2水溶胶分离出来,用蒸馏水将TiO2水溶胶中二氧化钛的质量浓度稀释为0.1%-1.5%。
3.根据权利要求1所述的无氟超疏水棉织物的制备方法,其特征在于:所述的纳米TiO2水溶胶对棉织物的轧-烘-焙整理方法为:采用二浸二轧法,将棉织物浸渍于质量浓度为0.1%-1.5%纳米TiO2水溶胶中5-20分钟,利用轧车轧去多余的溶胶,轧余率控制为60%wt-80%wt,先将棉织物于60-80℃烘干,然后在120-160℃焙烘1-10min。
4.根据权利要求1所述的无氟超疏水棉织物的制备方法,其特征在于:所述的通过加热熔融将固体石蜡或白蜡转移到TiO2水溶胶处理过的棉织物表面的方法为:将固体石蜡或白蜡先涂在纸上制成蜡纸,然后将蜡纸与TiO2水溶胶处理过的棉织物表面相接触,加热温度在100-150℃,将蜡纸上的蜡通过热融转移到棉织物上,然后自然冷却,使蜡质在棉织物表面结晶固化。
5.根据权利要求1所述的无氟超疏水棉织物的制备方法,其特征在于:所述的无氟超疏水棉织物与水滴的接触角超过150°,具有荷叶般的超疏水性能和自清洁功能。
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