CN111648126A - 一种基于改性纳米TiO2的多功能涤纶织物及整理方法 - Google Patents
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Abstract
本发明属于纺织技术领域,公开了一种基于改性纳米TiO2的多功能涤纶织物及整理方法,先利用竹叶提取液改性纳米TiO2粉体,后将改性的纳米TiO2粉体与Britton‑Robinson缓冲溶液配制成整理液,并利用该整理液整理涤纶织物。本发明中经过竹叶提取液改性处理的纳米TiO2在紫外区的吸收带被拓宽,在可见区出现了新的吸收峰,进而可大幅提升涤纶织物光催化自清洁性能。测试结果表明,本发明整理方法整理得到的涤纶织物具有较好的消臭性能,在明暗条件下均有较好的抗菌性能,扫描电镜结果显示涤纶纤维表面附着了更多的纳米TiO2颗粒并减少了团聚现象。本发明提供的整理方法可应用于涤纶类非织造布、针织物、机织物和成衣的整理,也可应用于涤纶散纤维和纱线的整理。
Description
技术领域
本发明涉及纺织技术领域,尤其涉及一种基于改性纳米TiO2的多功能涤纶织物及整理方法。
背景技术
一般抗菌防臭产品主要是通过抗菌剂抑制细菌生长来达到防止臭味产生的目的,效果并不显著。另外,纺织品在穿着、使用过程中,会不小心沾污渍,这些污物不仅影响人们的使用,也是微生物繁殖的良好环境。随着人们生活节奏的加快,以及追求高质量生活的要求,具有自清洁能力,而且能够抗菌、消臭的纺织品应运而生。
纳米TiO2是一种无机纳米光催化材料,在其对纺织品功能加工中,一般是通过采用金属离子对纳米TiO2杂化的方法提高光催化效果。金属离子特别是重金属离子存在环境的污染问题。而且,该类整理方法效果一般,生产成本较高。
发明内容
有鉴于此,本发明的目的是提供一种基于改性纳米TiO2的多功能涤纶织物及整理方法,该方法整理得到的涤纶织物具有较好的消臭性能,且在可见光和紫外光照条件下均具有较好的自清洁性能和抗菌性能。
为解决上述技术问题,本发明提供了一种基于改性纳米TiO2的多功能涤纶织物整理方法,包括以下步骤:
1)将涤纶织物按浴比1:20~50浸入草木灰溶液中处理;
2)将新鲜竹叶洗净晾干后利用无水乙醇避光条件下进行萃取,得到竹叶提取液;所述新鲜竹叶和所述无水乙醇的料液比为1g:(20~100)mL;
3)将纳米TiO2粉体加入步骤2)得到的竹叶提取液中,暗处放置24h,离心,取下层沉淀并烘干,得到改性纳米TiO2粉体;
4)将所述改性纳米TiO2粉体加入缓冲溶液,超声分散60min,得到整理液,所述缓冲溶液选自pH值为8~10的Britton-Robinson缓冲溶液;
5)将步骤1)处理得到的涤纶织物按浴比为1:50~100浸入所述整理液中,超声处理60~120min,洗净后晾干,得到多功能涤纶织物。
优选的,步骤1)中,所述草木灰溶液的浓度为20~60g/L,所述处理的温度为85~95℃,所述处理的时间为1~2h。
优选的,步骤3)中,所述纳米TiO2粉体和竹叶提取液的用量比为2g:(20~100)mL。
优选的,步骤4)中,所述改性纳米TiO2粉体和所述缓冲溶液的用量比为2g:(50~100)mL。
优选的,所述涤纶织物为涤纶非织造布、涤纶针织物、涤纶机织物和涤纶成衣中的一种。
本发明还提供了一种上述整理方法整理得到的多功能涤纶织物。
与现有技术相比,本发明具有以下有益效果:
本发明提供的整理方法先通过对涤纶织物的预处理使涤纶织物表面暴露更多的羟基,然后将涤纶织物浸入含有经过竹叶提取液改性处理的纳米TiO2的整理液中进行整理,得到多功能涤纶织物。本发明中经过竹叶提取液改性处理的纳米TiO2在紫外区的吸收带被拓宽,在可见区出现了新的吸收峰,对织物上亚甲基蓝的光催化褪色效果显著,大幅提升了织物自清洁性能。测试结果表明,本发明整理方法整理得到的涤纶织物具有较好的消臭性能,在明暗条件下均有较好的抗菌性能,扫描电镜结果显示涤纶纤维表面附着了更多的纳米TiO2颗粒并减少了团聚现象。本发明提供的整理方法可应用于涤纶类非织造布、针织物、机织物和成衣的整理,也可应用于涤纶散纤维和纱线的整理。
附图说明
图1为纳米TiO2粉体和实施例1中改性纳米TiO2粉体的漫反射光谱;
图2为未处理涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1得到的多功能涤纶织物在暗条件和明条件下对大肠杆菌的抑菌效果图;
图3为未处理涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1得到的多功能涤纶织物在暗条件和明条件下对金黄色葡萄球菌的抑菌效果图;
图4为未处理涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1得到的多功能涤纶织物的SEM图。
具体实施方式
为了进一步理解本发明,下面结合实施例对本发明优选实施方案进行描述,但是应当理解,这些描述只是为了进一步说明本发明的特征和优点,而不是对本发明权利要求的限制。
本发明所有原料,对其来源没有特别限制,在市场上购买的或按照本领域技术人员熟知的常规方法制备的即可。
实施例1
(1)预处理:将涤纶织物按浴比1:50浸入浓度为20g/L的草木灰溶液中,再于95℃恒温水浴锅中煮1h,取出涤纶织物水洗晾干;
(2)将1g新鲜竹叶洗净晾干后浸入20mL无水乙醇中,暗处静置24h,得到竹叶提取液;
(3)将2g纳米TiO2粉体加入步骤2)得到的竹叶提取液中,暗处放置24h,离心,取下层沉淀并烘干,得到改性纳米TiO2粉体;
(4)配制50mL pH值为10的Britton-Robinson缓冲溶液,加入步骤(3)得到的改性纳米TiO2粉体,超声分散60min,得到整理液;
(5)将步骤(1)进行预处理后的涤纶织物按浴比为1:100浸入步骤(4)得到的整理液中,超声处理60min,用自来水清洗,蒸馏水冲洗,晾干,得到本实施例多功能涤纶织物。
实施例2
(1)预处理:将涤纶织物按浴比1:20浸入浓度为50g/L的草木灰溶液中,再于90℃恒温水浴锅中煮2h,取出涤纶织物水洗晾干;
(2)将1g新鲜竹叶洗净晾干后浸入100mL无水乙醇中,暗处静置24h,得到竹叶提取液;
(3)将2g纳米TiO2粉体加入步骤2)得到的竹叶提取液中,暗处放置24h,离心,取下层沉淀并烘干,得到改性纳米TiO2粉体;
(4)配制100mL pH值为10的Britton-Robinson缓冲溶液,加入步骤(3)得到的改性纳米TiO2粉体,超声分散120min,得到整理液;
(5)将步骤(1)进行预处理后的涤纶织物按浴比为1:50浸入步骤(4)得到的整理液中,超声处理120min,用自来水清洗,蒸馏水冲洗,晾干,得到本实施例多功能涤纶织物。
对比例:常规纳米TiO2粉体整理的涤纶织物
配制50mL pH值为10的Britton-Robinson缓冲溶液,加入2g纳米TiO2粉体,超声分散60min,得到整理液,将实施例1步骤(1)预处理得到的涤纶织物按浴比为1:100浸入得到的整理液中,超声处理60min,用自来水清洗,蒸馏水冲洗,晾干,得到常规纳米TiO2粉体整理的涤纶织物。
测试例
(1)改性纳米TiO2粉体可见光响应效果测试
测试纳米TiO2粉体和实施例1步骤(3)中改性纳米TiO2粉体的漫反射光谱,结果如图1所示。由图1发现改性纳米TiO2粉体的漫反射光谱中在416和664nm出现了新的特征峰,吸收峰范围从单独紫外光区扩展到了可见光区,禁带宽度变浅,为电子由基态跃迁到激发态和系间窜越提供了有利的条件,从而拓宽了光响应范围,提高了光催化性能。说明本发明实施例1提供的用竹叶提取液改性得到的改性纳米TiO2粉体具有良好的可见光响应效果。
(2)对亚甲基蓝的光催化褪色效果测试
分别在紫外光和日光下测试对未处理的涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1制备得到的多功能涤纶织物上的亚甲基蓝的光催化褪色效果,并计算光照射前后色差△E和△RGB,结果见表1。
具体测试过程如下:
将未处理的涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1制备得到的多功能涤纶织物浸到20mL的亚甲基蓝溶液(0.05%)中3min,室温下避光晾干,紫外光或日光照射(紫外光照射采用15W的紫外灯照射2h;日光照射选择8月份12:00-16:00的日光下照射4h),通过测配色仪测试照射前与照射后涤纶织物的参数L、a、b、R、G、B,并通过以下公式计算光照射前后色差△E和△RGB:
其中,R1、G1、B1和R2、G2、B2分别为织物光源照射前和之后的R、G、B值。△E和△RGB越高,涤纶织物上亚甲基蓝光催化褪色效果越好。
表1紫外光/日光下对织物上亚甲基蓝的光催化褪色效果影响
由表1可知,本发明实施例1提供的多功能涤纶织物在紫外光和日光下降解亚甲基蓝的△E分别为24.84、23.81,△RGB分别为70.04、63.94;相比常规纳米TiO2粉体整理的涤纶织物,本发明实施例1提供的多功能涤纶织物在紫外光照条件下,△E和△RGB分别提高了2.53、10.97,在日光条件下,△E和△RGB分别提高了4.39、19.39。
由表1可知,本发明实施例1提供的多功能涤纶织物在日光或紫外光照条件下,对比常规纳米TiO2粉体整理的涤纶织物,对亚甲基蓝的光催化褪色效果大幅提高,表明实施例1提供的多功能涤纶织物的光催化自清洁效果显著。
(3)抗菌性能测试
按GB/T 23763-2009《光催化抗菌材料及制品抗菌性能的评价》对未处理涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1得到的多功能涤纶织物在暗条件和明条件下对大肠杆菌和金黄色葡萄球菌的抑菌效果,其中未处理涤纶织物作为对照组。对大肠杆菌的抑菌效果如图2所示,对金黄色葡萄球菌的抑菌效果如图3所示。
由图2和图3可知,无论在明条件还是暗条件下,与常规纳米TiO2粉体整理的涤纶织物相比,本发明改性纳米TiO2粉体整理的涤纶织物具有更明显的抑菌效果。
在明条件下,经过计算,常规纳米TiO2粉体整理的涤纶织物对于大肠杆菌和金黄色葡萄球菌的抑菌率分别为89.15%和92.42%,多功能涤纶织物对于大肠杆菌和金黄色葡萄球菌的抑菌率分别为98.16%和99.99%。进一步证明竹叶提取液改性得到的改性纳米TiO2粉体整理的涤纶织物具有更好的抑菌效果。
(4)消臭性能测试
以未处理涤纶织物(对照组)、常规纳米TiO2粉体整理的涤纶织物(对比例)和实施例1得到的多功能涤纶织物作为待测试织物,测试消臭效果,结果如表2所示。
具体测试过程:
将所有待测试织物均剪裁为两块直径4cm的圆形织物,吸取0.1mL的氨水于玻璃皿上,将玻璃皿放置在干燥器底部,将两块圆形织物置于干燥器托盘上,其中一块持续照射紫外灯,另一块作为对照样不给予紫外灯照射。2h后,将每个待测试织物对应的两块圆形织物分别用100mL蒸馏水在40℃下萃取2h。采用标准HJ534-2009次氯酸钠-水杨酸分光光度法测定所有待测试织物对应的两块圆形织物的萃取液中的氨含量并计算其差值,得到待测试织物的消氨值如表2所示。
表2待测试织物的消氨值
试样 | 消氨值(mg/g织物) |
未处理涤纶织物 | 0.0541 |
常规纳米TiO<sub>2</sub>粉体整理的涤纶织物 | 0.1520 |
多功能涤纶织物 | 0.3116 |
由表2可知,相比常规纳米TiO2粉体整理的涤纶织物,改性纳米TiO2粉体整理的涤纶织物的消氨值增至两倍以上,达到0.3116mg/g织物,消臭效果大幅提升。
(5)SEM效果分析
拍摄未处理涤纶织物、常规纳米TiO2粉体整理的涤纶织物和实施例1得到的多功能涤纶织物的SEM图片,如图4所示,其中A为未处理涤纶织物的SEM图片,B为常规纳米TiO2粉体整理的涤纶织物的SEM图片,C为实施例1得到的多功能涤纶织物的SEM图片。观察图4发现,B中纤维表面附着纳米TiO2粉体,但粘附量较少;C中纤维表面附着更多且粒径更小的纳米TiO2颗粒,说明通过竹叶提取液改性后增加了纳米TiO2在纤维上的附着并减少了纳米TiO2的团聚。
综上所述,本发明利用竹叶提取液改性得到的改性纳米TiO2粉体对涤纶织物进行整理得到的多功能涤纶织物具有更好的消臭性能、抗菌性能和光催化自清洁效果,纳米TiO2在该织物纤维上的附着量增加了并且纳米TiO2的团聚现象减少了。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点,对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (6)
1.一种基于改性纳米TiO2的多功能涤纶织物整理方法,其特征在于,包括以下步骤:
1)将涤纶织物按浴比1:20~50浸入草木灰溶液中处理;
2)将新鲜竹叶洗净晾干后利用无水乙醇避光条件下进行萃取,得到竹叶提取液;所述新鲜竹叶和所述无水乙醇的料液比为1g:(20~100)mL;
3)将纳米TiO2粉体加入步骤2)得到的竹叶提取液中,暗处放置24h,离心,取下层沉淀并烘干,得到改性纳米TiO2粉体;
4)将所述改性纳米TiO2粉体加入缓冲溶液,超声分散60min,得到整理液,所述缓冲溶液选自pH值为8~10的Britton-Robinson缓冲溶液;
5)将步骤1)处理得到的涤纶织物按浴比为1:50~100浸入所述整理液中,超声处理60~120min,洗净后晾干,得到多功能涤纶织物。
2.根据权利要求1所述的整理方法,其特征在于,步骤1)中,所述草木灰溶液的浓度为20~60g/L,所述处理的温度为85~95℃,所述处理的时间为1~2h。
3.根据权利要求1所述的整理方法,其特征在于,步骤3)中,所述纳米TiO2粉体和竹叶提取液的用量比为2g:(20~100)mL。
4.根据权利要求1所述的整理方法,其特征在于,步骤4)中,所述改性纳米TiO2粉体和所述缓冲溶液的用量比为2g:(50~100)mL。
5.根据权利要求1所述的整理方法,其特征在于,所述涤纶织物为涤纶非织造布、涤纶针织物、涤纶机织物和涤纶成衣中的一种。
6.一种权利要求1~5任一项所述的整理方法整理得到的多功能涤纶织物。
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