CN107460727B - 一种基于层层自组装银纳米线-石墨烯的导电棉纤维 - Google Patents

一种基于层层自组装银纳米线-石墨烯的导电棉纤维 Download PDF

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CN107460727B
CN107460727B CN201710836984.0A CN201710836984A CN107460727B CN 107460727 B CN107460727 B CN 107460727B CN 201710836984 A CN201710836984 A CN 201710836984A CN 107460727 B CN107460727 B CN 107460727B
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赵兵
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Jiangsu Hua Hao silk Limited by Share Ltd
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Abstract

本发明公开了一种基于层层自组装银纳米线‑石墨烯的导电棉纤维,首先将棉织物阴离子化,然后在阴离子化棉织物表面层层自组装银纳米线和氧化石墨烯,最后将氧化石墨烯还原得到银纳米线‑石墨烯导电棉纤维。银纳米线‑石墨烯赋予了棉纤维优异的导电、抗菌、抗紫外、抗皱和耐洗性能,在可穿戴设备、柔性导电器件等领域具有重要的应用价值。

Description

一种基于层层自组装银纳米线-石墨烯的导电棉纤维
技术领域
本发明涉及一种基于层层自组装银纳米线-石墨烯的导电棉纤维,属纺织材料领域。
背景技术
棉纤维以其优异的吸湿、透气、舒适、柔软、保暖、可再生、可降解等性能受到广大消费者的喜爱。但与合成纤维相比,棉纤维的功能性仍然存在不足。例如:(1)棉纤维具有比表面积大和吸湿能力强等特点,因而在服用过程中容易附着、繁殖和传播微生物,从而造成棉纤维强力下降、产生污点、褪色和气味,甚至传播疾病,影响人体健康。(2)过量的紫外线照射会造成皮肤损伤、老化,甚至引起癌变。(3)近年来导电纺织品逐渐成为研究的热点,导电棉织物在柔性可穿戴设备中有巨大的应用价值。因此为了充分挖掘棉纤维的潜在功能,提高棉纤维的技术含量和产品附加值,对棉纤维进行功能化改性成为一个重要的研究方向(超支化聚合物的制备及对棉纤维的功能化改性[D].苏州大学,2009)。
无机纳米材料是指尺寸处于1-100nm的材料,相对于其它纳米材料,无机纳米材料具有制备简单,成本低廉、粒径均一等优势,在光催化、太阳能电池、生物、医药、纺织、印染、可穿戴电子设备等领域有着广泛的研究和应用。在众多类型的无机纳米材料中,纳米银占据着重要的位置,将纳米银与棉纤维相结合可有效改善棉纤维固有缺陷,扩大棉纤维适用范围,提高棉纤维附加值。大量文献报道了使用纳米银颗粒改性棉纤维后,可赋予棉纤维优异的抗菌、抗紫外、导电、电磁屏蔽等性能。但是上述文献多采用零维的银纳米颗粒改性棉织物。例如Zhang使用纳米银对棉织物进行抗菌组装,组装后的棉织物对金黄色葡萄球菌和大肠杆菌的抑菌率分别为99.01%和99.26%,经过20次洗涤后,抑菌率仍高达98.77%(Fibersand Polymers, 2009, 10(4): 496-501)。
一维结构的银纳米线具有高比表面积、导热、导电、透光、延展性、机械强度和柔性等性能,在柔性导电薄膜、太阳能电池、触摸屏、显示屏、传感器等领域有潜在的应用价值(中国材料进展, 2016(07): 545-551)。目前已有少量关于银纳米线改性纺织纤维的研究报道(基于银纳米线导电网络的电子纺织品, 化学进展, 2017, 29(8): 892-901)。伊朗伊斯兰自由大学Nateghi采用AgNWs改性棉织物,并研究了改性后棉织物的抗菌、抗紫外、导电和超疏水性能(Carbohydrate Polymers, 2015, 117:160)。加拿大滑铁卢大学Atwa通过浸渍-提拉法在棉线表面涂覆AgNWs导电网络,然后150℃退火30分钟,从而制备得到导电棉线(Journal of Materials Chemistry C, 2015, 3(16):3908)。波兰纺织科学研究所Cies´lak使用浸渍-烘干法组装棉织物(Cellulose, 2017, 24(1):409)。苏州大学修阿男将棉织物浸渍在AgNWs溶液中进行抗菌、抗紫外组装(修阿男. 两亲性超支化聚缩水甘油醚、银纳米线的制备及棉织物组装初探[D].苏州大学,2015)。中国发明专利CN201610217104.7将棉布浸泡于银纳米线/乙醇分散液中,取出干燥后再次浸泡于上述分散液中,反复多次得到表面吸附有银纳米线的导电棉布。南京邮电大学张自强首先利用毛细诱导自组装的方法将AgNWs组装在尼龙纱线上,得到AgNWs导电纱线,然后将制备好的AgNWs导电纱线浸渍在丝素溶液中进行二次组装,最后再将丝素还原,得到具有较好机械性能和粘附性能的石墨烯包裹的AgNWs导电纱线(张自强. 导电纳米材料在纤维表面的毛细自组装及性能研究[D].南京邮电大学,2016)。但是上述文献中AgNWs与纤维之间的作用主要以范德华力和氢键形式存在的物理吸附为主,缺乏牢固的作用力结合,其耐洗牢度偏弱(基于银纳米线导电网络的电子纺织品, 化学进展, 2017, 29(8): 892-901)。
发明内容
本发明针对上述不足,提供一种基于层层自组装银纳米线-石墨烯的导电棉纤维及其制备方法。
本发明通过下述技术方案予以实现:
(1)将棉织物置于质量分数为20%的氢氧化钠溶液中,浴比1:50,90℃反应120min,用去离子水反复洗至中性,烘干后得到氢氧化钠改性棉织物;然后将氢氧化钠改性棉织物重新分散于去离子水中,浴比1:50,加入引发剂硝酸铈铵,其中硝酸铈铵与氢氧化钠改性棉织物的质量比为1:10-1:30,持续通入氮气保护,混合搅拌120min,然后缓慢加入二丁酸二辛酯磺酸钠,所述氢氧化钠改性棉织物与二丁酸二辛酯磺酸钠的质量比为5:1-1:1,混合搅拌均匀后,缓慢升温至80-90℃并磁力搅拌1-12h,自然冷却到室温,洗涤、抽滤、干燥后得到阴离子化棉织物。(2)将1-10g/L的银纳米线异丙醇分散溶液与0.1-1g/L的四氟硼酸亚硝鎓乙醇溶液在室温下混合,所述银纳米线异丙醇分散溶液与四氟硼酸亚硝鎓乙醇溶液的体积比为1:1-5:1,将混合物轻轻摇动,直至银纳米线沉淀,离心分离后,重新分散于去离子水中,按体积比1:1-1:10,加入0.01g/L-100g/L的端氨基超支化聚合物水溶液,匀速搅拌24h,得到端氨基超支化聚合物修饰银纳米线,离心分离,用去离子水和乙醇多次洗涤,干燥。(3)将步骤二中的端氨基超支化聚合物修饰银纳米线配制成0.1-10g/L的水溶液,然后将步骤一中的阴离子化棉织物浸渍在端氨基超支化聚合物修饰银纳米线水溶液中10-60min,浴比1:50,取出后用去离子水反复冲洗,烘干;然后将上述棉织物浸渍在1-10g/L的氧化石墨烯溶液中10-60min,浴比1:50,取出后用去离子水反复冲洗,烘干,至此已将一层氧化石墨烯/银纳米线组装到棉织物的表面,随后依次在银纳米线和氧化石墨烯整理液中重复上述操作,根据需要决定棉织物表面氧化石墨烯/银纳米线组装的层数;最后置于还原剂中进行还原,洗涤、抽滤、真空干燥后得到基于层层自组装银纳米线-石墨烯的导电棉纤维。
作为优选方案,所述还原剂为水合肼、硼氢化钠、柠檬酸钠、维生素C、氢碘酸、茶多酚中的一种或多种。
多元醇法合成银纳米线可参考文献:彭勇宜,徐国钧,代国章,李宏建. 银纳米线的多元醇法制备工艺条件研究[J]. 材料导报,2015,29(22):79-81+86;夏兴达,杨兵初,张祥,周聪华. 多元醇热法制备银纳米线及其在透明导电薄膜中的应用[J]. 功能材料,2016,47(05):5091-5095;李逸群. 液相多元醇法可控合成金属银纳米线及其在透明导电膜中的应用[D].兰州大学,2015;马晓,游芳芳,冯晋阳,赵修建. 多元醇法制备一维Ag纳米线[J]. 人工晶体学报,2014,43(03):587-591;郭瑞萍,郑敏,章海霞. 微波辅助多元醇法快速制备Ag纳米线的研究[J]. 太原理工大学学报,2013,44(01):76-80;中国发明专利CN201610804238.9;中国发明专利CN201710357029.9。
端氨基超支化聚合物的合成可参考:张峰,陈宇岳,张德锁,华琰蓉,赵兵. 端氨基超支化聚合物及其季铵盐的制备与性能[J]. 高分子材料科学与工程,2009,25(08):141-144;中国发明专利CN200710020794.8一种超支化活性染料无盐染色助剂。
与现有技术相比,本发明的优点在于:银纳米线与氧化石墨烯、阴离子化棉纤维通过静电引力牢固结合,银纳米线和石墨烯赋予了棉纤维优异的导电、抗菌、抗紫外和耐洗性能。
具体实施方式
下面结合具体实施方式,进一步阐述本发明。
实施例1:
(1)将棉织物置于质量分数为20%的氢氧化钠溶液中,浴比1:50,90℃反应120min,用去离子水反复洗至中性,烘干后得到氢氧化钠改性棉织物;然后将氢氧化钠改性棉织物重新分散于去离子水中,浴比1:50,加入引发剂硝酸铈铵,其中硝酸铈铵与氢氧化钠改性棉织物的质量比为1:10,持续通入氮气保护,混合搅拌120min,然后缓慢加入二丁酸二辛酯磺酸钠,所述氢氧化钠改性棉织物与二丁酸二辛酯磺酸钠的质量比为1:1,混合搅拌均匀后,缓慢升温至80℃并磁力搅拌1h,自然冷却到室温,洗涤、抽滤、干燥后得到阴离子化棉织物。(2)将1g/L的银纳米线异丙醇分散溶液与0.1g/L的四氟硼酸亚硝鎓乙醇溶液在室温下混合,所述银纳米线异丙醇分散溶液与四氟硼酸亚硝鎓乙醇溶液的体积比为1:1,将混合物轻轻摇动,直至银纳米线沉淀,离心分离后,重新分散于去离子水中,按体积比1:1,加入1g/L的端氨基超支化聚合物水溶液,匀速搅拌24h,得到端氨基超支化聚合物修饰银纳米线,离心分离,用去离子水和乙醇多次洗涤,干燥。(3)将步骤二中的端氨基超支化聚合物修饰银纳米线配制成1g/L的水溶液,然后将步骤一中的阴离子化棉织物浸渍在端氨基超支化聚合物修饰银纳米线水溶液中10min,浴比1:50,取出后用去离子水反复冲洗,烘干;然后将上述棉织物浸渍在1g/L的氧化石墨烯溶液中10min,浴比1:50,取出后用去离子水反复冲洗,烘干,然后置于水合肼溶液中90℃还原2h,洗涤、抽滤、真空干燥后得到基于层层自组装银纳米线-石墨烯的导电棉纤维。
实施例2:
(1)将棉织物置于质量分数为20%的氢氧化钠溶液中,浴比1:50,90℃反应120min,用去离子水反复洗至中性,烘干后得到氢氧化钠改性棉织物;然后将氢氧化钠改性棉织物重新分散于去离子水中,浴比1:50,加入引发剂硝酸铈铵,其中硝酸铈铵与氢氧化钠改性棉织物的质量比为1:20,持续通入氮气保护,混合搅拌120min,然后缓慢加入二丁酸二辛酯磺酸钠,所述氢氧化钠改性棉织物与二丁酸二辛酯磺酸钠的质量比为2:1,混合搅拌均匀后,缓慢升温至90℃并磁力搅拌6h,自然冷却到室温,洗涤、抽滤、干燥后得到阴离子化棉织物。(2)将5g/L的银纳米线异丙醇分散溶液与0.5g/L的四氟硼酸亚硝鎓乙醇溶液在室温下混合,所述银纳米线异丙醇分散溶液与四氟硼酸亚硝鎓乙醇溶液的体积比为2:1,将混合物轻轻摇动,直至银纳米线沉淀,离心分离后,重新分散于去离子水中,按体积比1:5,加入10g/L的端氨基超支化聚合物水溶液,匀速搅拌24h,得到端氨基超支化聚合物修饰银纳米线,离心分离,用去离子水和乙醇多次洗涤,干燥。(3)将步骤二中的端氨基超支化聚合物修饰银纳米线配制成5g/L的水溶液,然后将步骤一中的阴离子化棉织物浸渍在端氨基超支化聚合物修饰银纳米线水溶液中30min,浴比1:50,取出后用去离子水反复冲洗,烘干;然后将上述棉织物浸渍在5g/L的氧化石墨烯溶液中30min,浴比1:50,取出后用去离子水反复冲洗,烘干,至此已将一层氧化石墨烯/银纳米线组装到棉织物的表面,随后依次在银纳米线和氧化石墨烯整理液中重复一次上述操作,然后置于柠檬酸钠中90℃还原12h,洗涤、抽滤、真空干燥后得到基于层层自组装银纳米线-石墨烯的导电棉纤维。
实施例3:
(1)将棉织物置于质量分数为20%的氢氧化钠溶液中,浴比1:50,90℃反应120min,用去离子水反复洗至中性,烘干后得到氢氧化钠改性棉织物;然后将氢氧化钠改性棉织物重新分散于去离子水中,浴比1:50,加入引发剂硝酸铈铵,其中硝酸铈铵与氢氧化钠改性棉织物的质量比为1:30,持续通入氮气保护,混合搅拌120min,然后缓慢加入二丁酸二辛酯磺酸钠,所述氢氧化钠改性棉织物与二丁酸二辛酯磺酸钠的质量比为5:1,混合搅拌均匀后,缓慢升温至90℃并磁力搅拌12h,自然冷却到室温,洗涤、抽滤、干燥后得到阴离子化棉织物。(2)将10g/L的银纳米线异丙醇分散溶液与1g/L的四氟硼酸亚硝鎓乙醇溶液在室温下混合,所述银纳米线异丙醇分散溶液与四氟硼酸亚硝鎓乙醇溶液的体积比为5:1,将混合物轻轻摇动,直至银纳米线沉淀,离心分离后,重新分散于去离子水中,按体积比1:10,加入100g/L的端氨基超支化聚合物水溶液,匀速搅拌24h,得到端氨基超支化聚合物修饰银纳米线,离心分离,用去离子水和乙醇多次洗涤,干燥。(3)将步骤二中的端氨基超支化聚合物修饰银纳米线配制成10g/L的水溶液,然后将步骤一中的阴离子化棉织物浸渍在端氨基超支化聚合物修饰银纳米线水溶液中60min,浴比1:50,取出后用去离子水反复冲洗,烘干;然后将上述棉织物浸渍在10g/L的氧化石墨烯溶液中60min,浴比1:50,取出后用去离子水反复冲洗,烘干,至此已将一层氧化石墨烯/银纳米线组装到棉织物的表面,随后依次在银纳米线和氧化石墨烯整理液中重复两次上述操作,然后置于硼氢化钠中60℃还原5h,洗涤、抽滤、真空干燥后得到基于层层自组装银纳米线-石墨烯的导电棉纤维。
显然,本发明的上述实施例仅仅是为清楚地说明本发明所作的举例,而并非是对本发明的实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无法对所有的实施方式予以穷举。凡是属于本发明的技术方案所引申出的显而易见的变化或变动仍处于本发明的保护范围之列。

Claims (4)

1.一种基于层层自组装银纳米线-石墨烯的导电棉纤维的制备方法,其特征在于:
步骤一:将棉织物置于质量分数为20%的氢氧化钠溶液中,浴比1:50,90℃反应120min,用去离子水反复洗至中性,烘干后得到氢氧化钠改性棉织物;然后将氢氧化钠改性棉织物重新分散于去离子水中,浴比1:50,加入引发剂硝酸铈铵,其中硝酸铈铵与氢氧化钠改性棉织物的质量比为1:10-1:30,持续通入氮气保护,混合搅拌120min,然后缓慢加入二丁酸二辛酯磺酸钠,所述氢氧化钠改性棉织物与二丁酸二辛酯磺酸钠的质量比为5:1-1:1,混合搅拌均匀后,缓慢升温至80-90℃并磁力搅拌1-12h,自然冷却到室温,洗涤、抽滤、干燥后得到阴离子化棉织物;
步骤二:将1-10g/L的银纳米线异丙醇分散溶液与0.1-1g/L的四氟硼酸亚硝鎓乙醇溶液在室温下混合,将混合物轻轻摇动,直至银纳米线沉淀,离心分离后,重新分散于去离子水中,按体积比1:1-1:10,加入0.01g/L-100g/L的端氨基超支化聚合物水溶液,匀速搅拌24h,得到端氨基超支化聚合物修饰银纳米线,离心分离,用去离子水和乙醇多次洗涤,干燥;
步骤三:将步骤二中的端氨基超支化聚合物修饰银纳米线配制成0.1-10g/L的水溶液,然后将步骤一中的阴离子化棉织物浸渍在端氨基超支化聚合物修饰银纳米线水溶液中10-60min,浴比1:50,取出后用去离子水反复冲洗,烘干;然后将上述棉织物浸渍在1-10g/L的氧化石墨烯溶液中10-60min,浴比1:50,取出后用去离子水反复冲洗,烘干,至此已将一层氧化石墨烯/银纳米线组装到棉织物的表面,随后依次在银纳米线和氧化石墨烯整理液中重复上述操作,根据需要决定棉织物表面氧化石墨烯/银纳米线组装的层数;最后置于还原剂中进行还原,洗涤、抽滤、真空干燥后得到基于层层自组装银纳米线-石墨烯的导电棉纤维。
2.根据权利要求1所述的一种基于层层自组装银纳米线-石墨烯的导电棉纤维的制备方法,其特征在于,所述银纳米线采用多元醇法合成。
3.根据权利要求1所述的一种基于层层自组装银纳米线-石墨烯的导电棉纤维的制备方法,其特征在于,所述银纳米线异丙醇分散溶液与四氟硼酸亚硝鎓乙醇溶液的体积比为1:1-5:1。
4.根据权利要求1所述的一种基于层层自组装银纳米线-石墨烯的导电棉纤维的制备方法,其特征在于,所述还原剂为水合肼、硼氢化钠、柠檬酸钠、维生素C、氢碘酸、茶多酚中的一种或多种。
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