CN106884316A - 一种光催化型无氟超疏水自清洁纺织品的制备方法 - Google Patents
一种光催化型无氟超疏水自清洁纺织品的制备方法 Download PDFInfo
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Abstract
本发明公开了一种光催化型无氟超疏水自清洁纺织品的制备方法,室温条件下,将疏水性二氧化硅颗粒分散于溶剂A中并超声处理获得二氧化硅分散液;然后向分散液中加入四氯化钛;之后将分散液升温至60℃并搅拌均匀,再移入密闭的聚四氟乙烯容器中水热处理,离心分离后获得二氧化硅/二氧化钛复合颗粒,洗涤、烘干后获得光催化超疏水复合粉体;将复合粉体分散于溶剂B中并超声处理获得光催化超疏水复合粉体分散液,再将洁净纺织品浸渍于该复合粉体分散液中,浸轧、烘干得到光催化型无氟超疏水自清洁纺织品。该制备方法可避免含氟拒水拒油整理剂对环境安全和人体健康的潜在威胁,同时可有效降解附着在织物表面的有机污渍,赋予纺织品长效自清洁性能。
Description
技术领域
本发明属于功能纺织品制备领域,具体涉及一种光催化型无氟超疏水自清洁纺织品的制备方法。
背景技术
含氟整理剂被广泛用于纺织品染整加工制备拒水拒油纺织品,但使用效果最佳的长氟碳链聚合物拒水拒油整理剂在生产或使用过程中会产生稳定的代谢终产物全氟辛烷磺酸盐或全氟辛酸,这些物质已被证实可严重威胁人体健康和环境安全,使得该类拒水拒油整理剂的使用受到国际社会的限制。各大助剂公司与印染企业正着力开发含氟拒水拒油整理剂的有效替代品及相应加工工艺,目前市场上的无氟拒水整理剂主要包括有机硅类、树状大分子类以及基于碳氢化合物的无氟聚合物等,这类整理剂可以赋予织物良好的拒水性能,但均无拒油性能。而日常生活中,人们经常会接触到油渍等有机污染物,这类污染物可以轻易润湿、渗透拒水纺织品,导致纺织品丧失自清洁功能。
除了超疏液(水/油)纺织品可以实现纺织品自清洁功能外,在纤维表面负载光催化材料制备光催化功能型纺织品也是实现自清洁纺织品的有效途径。对于光催化型自清洁纺织品,主要是将具有光催化功能的材料附着于纤维表面,在光的作用下,光催化剂对吸附于其表面的有机污物产生强烈催化降解作用,从而达到自清洁目的。光催化技术在自清洁材料中的应用已取得国内外的广泛共识,目前研究与应用最成熟且广泛的光催化材料为TiO2,最受到科学家与工业届的关注。但由于TiO2光催化剂的光催化功能无选择性,其在纺织品表面直接使用时会引起纤维发生光降解,导致织物机械强力快速下降。
将超疏水材料与光催化材料相结合,制备兼具光催化性能与超疏水性能的复合材料,并将其运用于纺织品自清洁整理,赋予纺织品拒水功能的同时有效降解沾污在纺织品表面的油渍,实现无氟长效自清洁纺织品的制备,在生态环保功能纺织品领域具有重要的实用价值与应用前景。鉴于此,本发明提出一种光催化型无氟超疏水自清洁纺织品的制备方法。
发明内容
本发明所要解决的技术问题是,针对当前含氟拒水拒油整理剂应用中的难题,提供一种光催化型无氟超疏水自清洁纺织品的制备方法,不涉及全氟辛烷磺酸盐和全氟辛酸的使用,赋予纺织品长效自清洁性能,可有效降解附着在织物表面的有机污渍,克服无氟拒水整理剂易被油渍污染的缺点,实现生态环保自清洁纺织品的高效、简易、快速制备。
本发明解决上述技术问题所采用的技术方案为:一种光催化型无氟超疏水自清洁纺织品的制备方法,包括以下步骤:
(1)室温条件下,将疏水性二氧化硅颗粒分散于溶剂A中并超声处理获得二氧化硅分散液;然后按四氯化钛与二氧化硅分散液的体积比1:(20~30),向二氧化硅分散液中加入四氯化钛;之后将该分散液升温至60℃并搅拌均匀,再将该分散液移入密闭的聚四氟乙烯容器中进行水热处理,离心分离后获得二氧化硅/二氧化钛复合颗粒,洗涤、烘干后获得光催化超疏水复合粉体;
(2)室温条件下,将光催化超疏水复合粉体分散于溶剂B中并超声处理获得光催化超疏水复合粉体分散液,再将洁净纺织品浸渍于该光催化超疏水复合粉体分散液中,浸轧、烘干得到光催化型无氟超疏水自清洁纺织品。
作为优选,步骤(1)中,所述的溶剂A为苯甲醇或异丙醇;所述的二氧化硅分散液的质量浓度为0.05-0.5g/mL。
作为优选,步骤(1)中,超声处理的时间为5-15分钟;搅拌时间为3-10小时。
作为优选,步骤(1)中,水热处理的温度为60-85℃,水热处理的时间为20-28小时。
作为优选,步骤(1)中,采用乙醇和四氢呋喃洗涤;烘干温度为75-85℃,烘干时间为10-15小时。
作为优选,步骤(2)中,所述的溶剂B为甲醇、乙醇或异丙醇等;所述的光催化超疏水复合粉体分散液的质量浓度为5-25g/L。
作为优选,步骤(2)中,超声处理的时间为5-15分钟。
作为优选,步骤(2)中,所述的洁净纺织品为涤纶织物、棉织物或锦纶织物。
作为优选,步骤(2)中,浸渍时间为3-10分钟;浸轧的轧余率为70-90%。
作为优选,步骤(2)中,烘干温度为60-80℃,烘干时间为10-60分钟。
与现有技术相比,本发明的优点在于:
1)本发明光催化型无氟超疏水自清洁纺织品的制备方法,不涉及全氟辛烷磺酸盐和全氟辛酸的使用,避免了含氟拒水拒油整理剂对环境安全和人体健康的潜在威胁;
2)本发明以制备的二氧化钛作为光催化材料,可以有效克服无氟拒水整理剂易被油渍沾污的缺点,能够对附着在纺织品表面的有机污渍进行光照降解,提高无氟拒水整理织物自清洁性能,实现生态环保自清洁纺织品的高效、简易、快速制备;
3)本发明中,绝大部分二氧化钛附着在二氧化硅孔隙内部,不与纺织纤维直接接触,可有效减弱光催化材料对纤维的光学脆损。
附图说明
图1为实施例1获得的光催化超疏水复合粉体的TEM图片;
图2为实施例1获得的光催化超疏水复合粉体的SEM图片;
图3为实施例1获得的光催化超疏水复合粉体的EDX能谱图;
图4为实施例1获得的光催化超疏水复合粉体中C元素的分布图;
图5为实施例1获得的光催化超疏水复合粉体中O元素的分布图;
图6为实施例1获得的光催化超疏水复合粉体中Ti元素的分布图;
图7为实施例1获得的光催化超疏水复合粉体中Si元素的分布图。
具体实施方式
以下结合附图实施例对本发明作进一步详细描述。
实施例1:对于纯棉织物,采用本发明制备方法进行制备,具体包括以下步骤:
(1)室温条件下,称取2g疏水性二氧化硅纳米颗粒,加入到20mL质量浓度为0.1g/mL的苯甲醇中,利用超声细胞粉碎机处理3分钟,得到二氧化硅分散液;用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛,室温条件下搅拌1小时,然后在60℃下继续搅拌6小时;之后将该分散液移入一密闭的聚四氟乙烯容器中,并置于80℃烘箱中老化24小时,生成大量白色沉淀,将该白色沉淀离心分离,得到二氧化硅/二氧化钛复合颗粒,再依次用乙醇和四氢呋喃洗涤,最后置于80℃烘箱中烘干12小时,获得光催化超疏水复合粉体;
(2)室温条件下,将2克光催化超疏水复合粉体分散于200mL质量浓度为10g/L的甲醇中,利用超声细胞粉碎机处理3 分钟,得光催化超疏水复合粉体分散液,再将纯棉织物浸渍于该光催化超疏水复合粉体分散液中,二浸二轧(轧余率90%)、80℃条件下烘干10分钟,得到具有光催化功能的超疏水纯棉织物。经检测,该超疏水纯棉织物与水滴的静态接触角达158°,以油酸作为油渍模拟物,经油酸沾污的功能织物丧失其拒水性,而织物在紫外光照3小时后,油渍被TiO2降解,可以恢复其拒水性,该过程重复十次后织物仍可以恢复其超疏水性能。
实施例1获得的光催化超疏水复合粉体的TEM图片见图1,SEM图片见图2,EDX能谱图见图3,从图1可以明显看出TiO2的晶格结构。实施例1获得的光催化超疏水复合粉体中C元素的分布图见图4,O元素的分布图见图5,Ti元素的分布图见图6,Si元素的分布图见图7。
实施例2:对于涤纶织物,采用本发明制备方法进行制备,具体包括以下步骤:
(1)室温条件下,称取5g疏水性二氧化硅纳米颗粒,加入到30mL质量浓度为0.17g/mL的甲醇中,利用超声细胞粉碎机处理5分钟,得到二氧化硅分散液;用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛,室温条件下搅拌2小时,然后在60℃下继续搅拌6小时;之后将该分散液移入一密闭的聚四氟乙烯容器中,并置于80℃烘箱中老化24小时,生成大量白色沉淀,将该白色沉淀离心分离,得到二氧化硅/二氧化钛复合颗粒,再依次用乙醇和四氢呋喃洗涤,最后置于80℃烘箱中烘干12小时,获得光催化超疏水复合粉体;
(2)室温条件下,将2克光催化超疏水复合粉体分散于100mL质量浓度为20g/L的乙醇中,利用超声细胞粉碎机处理5 分钟,得光催化超疏水复合粉体分散液,再将涤纶织物浸渍于该光催化超疏水复合粉体分散液中,二浸二轧(轧余率70%)、80℃条件下烘干10分钟,得到具有光催化功能的超疏水涤纶织物。经检测,该超疏水涤纶织物与水滴的静态接触角达162°,以油酸作为油渍模拟物,经油酸沾污的功能织物丧失其拒水性,而织物在紫外光照3小时后,油渍被TiO2降解,可以恢复其拒水性,该过程重复十次后织物仍可以恢复其超疏水性能。
实施例3:对于涤/棉混纺织物,采用本发明制备方法进行制备,具体包括以下步骤:
(1)室温条件下,称取3g疏水性二氧化硅纳米颗粒,加入到30mL质量浓度为0.1g/mL的苯甲醇中,利用超声细胞粉碎机处理4分钟,得到二氧化硅分散液;用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛,室温条件下搅拌2小时,然后在60℃下继续搅拌6小时;之后将该分散液移入一密闭的聚四氟乙烯容器中,并置于80℃烘箱中老化24小时,生成大量白色沉淀,将该白色沉淀离心分离,得到二氧化硅/二氧化钛复合颗粒,再依次用乙醇和四氢呋喃洗涤,最后置于80℃烘箱中烘干12小时,获得光催化超疏水复合粉体;
(2)室温条件下,将2克光催化超疏水复合粉体分散于150mL质量浓度为13.3g/L的甲醇中,利用超声细胞粉碎机处理4 分钟,得光催化超疏水复合粉体分散液,再将涤/棉混纺织物浸渍于该光催化超疏水复合粉体分散液中,二浸二轧(轧余率80%)、80℃条件下烘干30分钟,得到具有光催化功能的超疏水涤/棉混纺织物。经检测,该超疏水涤/棉混纺织物与水滴的静态接触角达158°,以油酸作为油渍模拟物,经油酸沾污的功能织物丧失其拒水性,而织物在紫外光照3小时后,油渍被TiO2降解,可以恢复其拒水性,该过程重复十次后织物仍可以恢复其超疏水性能。
Claims (10)
1.一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于包括以下步骤:
(1)室温条件下,将疏水性二氧化硅颗粒分散于溶剂A中并超声处理获得二氧化硅分散液;然后按四氯化钛与二氧化硅分散液的体积比1:(20~30),向二氧化硅分散液中加入四氯化钛;之后将该分散液升温至60℃并搅拌均匀,再将该分散液移入密闭的聚四氟乙烯容器中进行水热处理,离心分离后获得二氧化硅/二氧化钛复合颗粒,洗涤、烘干后获得光催化超疏水复合粉体;
(2)室温条件下,将光催化超疏水复合粉体分散于溶剂B中并超声处理获得光催化超疏水复合粉体分散液,再将洁净纺织品浸渍于该光催化超疏水复合粉体分散液中,浸轧、烘干得到光催化型无氟超疏水自清洁纺织品。
2.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(1)中,所述的溶剂A为苯甲醇或异丙醇;所述的二氧化硅分散液的质量浓度为0.05-0.5g/mL。
3.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(1)中,超声处理的时间为5-15分钟;搅拌时间为3-10小时。
4.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(1)中,水热处理的温度为60-85℃,水热处理的时间为20-28小时。
5.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(1)中,采用乙醇和四氢呋喃洗涤;烘干温度为75-85℃,烘干时间为10-15小时。
6.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(2)中,所述的溶剂B为甲醇、乙醇或异丙醇等;所述的光催化超疏水复合粉体分散液的质量浓度为5-25g/L。
7.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(2)中,超声处理的时间为5-15分钟。
8.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(2)中,所述的洁净纺织品为涤纶织物、棉织物或锦纶织物。
9.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(2)中,浸渍时间为3-10分钟;浸轧的轧余率为70-90%。
10.根据权利要求1所述的一种光催化型无氟超疏水自清洁纺织品的制备方法,其特征在于:步骤(2)中,烘干温度为60-80℃,烘干时间为10-60分钟。
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