CN111535036A - 发泡pu负载纳米光触媒材料的织物及其制备方法 - Google Patents
发泡pu负载纳米光触媒材料的织物及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种发泡PU负载纳米光触媒材料的织物的制备方法,包括以下步骤:将纳米光触媒材料与聚氨酯发泡胶液进行混合得到混合胶液;将织物浸入所述混合胶液中,并控制浸胶后织物上的残留胶量;使浸胶织物中的胶液发泡固化,得到所述发泡PU负载纳米光触媒材料的织物。本发明的发泡PU负载纳米光触媒材料的织物的制备方法,有效的将纳米光触媒材料、发泡PU以及织物三者结合起来,得到一种催化效率高、工艺流程简单、耐水洗等特性的纺织品。
Description
技术领域
本发明涉及功能纺织品技术领域,具体涉及一种发泡PU负载纳米光触媒材料的织物的制备方法以及根据该制备方法制备得到的发泡PU负载纳米光触媒材料的织物。
背景技术
纳米光触媒材料,其纳米级的尺寸导致表面电子结构和晶体结构发生变化,在催化、光学、磁学、力学等方面展现出许多特殊功能,与纺织品结合可以实现紫外光遮蔽、抗菌防螨、抗紫外线、抗静电等功能。
目前,将纳米光触媒材料与纺织品结合有很多形式。第一种是将纳米材料分散在溶剂或者胶体等体系中,然后通过浸胶、辊涂等整理到织物上;此方法施工简单,成本较低,不足之处是效率低,结合较弱,多次水洗后会损失较多。第二种是通过将光触媒与纺丝原液混合,然后纺成纤维丝;此方法的问题是,只需要纤维表面的材料起作用,此种做法导致生产生成本增大,造成浪费,而且光触媒材料的加入降低了纤维的强度,经常需要与其他纤维混合使用。第三种方法是通过水溶液或者物理化学沉积的方法,将氧化物原位生长在面料的纤维表面;此方法制备的纤维催化效果好,但是工艺复杂,如受到水洗、挤压等也会有损失,影响了效率。因此,开发一种施工工艺简单、催化效率高、耐水洗等性能要求的纳米光触媒织物是其能得到广泛应用的关键。
发明内容
有鉴于此,为了克服现有技术的缺陷,本发明的目的是提供一种发泡PU负载纳米光触媒材料的织物的制备方法,通过该制备方法能够制备得到一种新型的发泡PU负载纳米光触媒材料的织物。
为了达到上述目的,本发明采用以下的技术方案:
一种发泡PU负载纳米光触媒材料的织物的制备方法,包括以下步骤:将纳米光触媒材料与聚氨酯发泡胶液进行预混并搅拌均匀得到混合胶液;将织物浸入混合胶液中,然后经过辊轧,控制浸胶后织物上的残留胶量;使浸胶织物中的胶液发泡固化,得到所述发泡PU负载纳米光触媒材料的织物,其回弹性好,抗菌性好。发泡固化为自然发泡晾干或放入烘箱中烘烤一定的时间均可。
优选地,所述混合胶液中所述纳米光触媒材料与聚氨酯发泡胶液的重量比为1:100-500。在一些实施例中,优选混合胶液中所述纳米光触媒材料与聚氨酯发泡胶液的重量比为1:300。纳米光触媒的比例太低导致抗菌效果不好,比例太高会浪费原料。
优选地,所述混合胶液中聚氨酯发泡胶液与水的质量比为5~10:1。
优选地,所述的聚氨酯发泡胶液的粘度为25℃下5000~10000mPa·s。胶液粘度太高会导致发泡受阻碍,粘度太低会导致泡体很快破裂。
优选地,所述残留胶量1~30倍的织物基体重量。在一些实施例中,所述残留胶量1~6倍的织物基体重量,残留量太低对弹性的提高没有帮助,还会影响抗菌效果;残留量太高会导致织物发硬,并且弹性还会下降到基体的水准以下。
优选地,所述织物为无纺纤维结构,其为化纤、毛、麻、丝绸、绵中的一种或多种。
优选地,所述纳米光触媒材料为金属氧化物、硫化物、基于石墨烯的材料、碳氮催化材料的一种或多种;所述纳米光触媒材料形貌为球状、多面体状、棒状、带状、片状或花状的粉末。具体的,纳米光触媒材料可以优选TiO2、ZnO、CdS、α-Fe2O3、WO3、SnO2、ZnS、SrTiO3、CdSe、CdTe、In2O3、FeS2、GaAs、GaP、SiC、MoS2等。
优选地,所述发泡固化为采用烘箱进行烘烤,所述烘箱的烘烤温度为50℃~100℃,固化时间为4~40h。
优选地,所述步骤还包括在将发泡固化后的材料的上下表面削去薄层,约1~2mm,以获得平整的表面和气泡开孔暴露,提高催化性能。
本发明还提供了一种根据如上所述的制备方法制备得到的发泡PU负载纳米光触媒材料的织物。
由于采用了以上的技术方案,相较于现有技术,本发明的有益之处在于:本发明的发泡PU负载纳米光触媒材料的织物的制备方法,有效的将纳米光触媒材料、发泡PU以及织物三者结合起来,得到一种催化效率高、工艺流程简单、耐水洗等特性的纺织品。
附图说明
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本发明优选实施例1制备得到的发泡PU负载纳米光触媒材料的织物的扫描电镜图;
图2为本发明优选实施例2制备得到的发泡PU负载纳米光触媒材料的织物的扫描电镜图;
图3为本发明优选实施例3制备得到的发泡PU负载纳米光触媒材料的织物的扫描电镜图;
图4为本发明优选实施例2制备得到的发泡PU负载纳米光触媒材料的织物的抑菌圈照片。
具体实施方式
为了使本技术领域的人员更好地理解本发明的技术方案,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分的实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。
实施例1:
称取纳米氧化锌粉体1g,再用按纯水、发泡PU胶液(粘度为6000mPa·s)按照重量比1:20:120称取,在烧杯中搅拌约30s进行均匀预混合。取一块尺寸(长×宽×厚)为200mm×200mm×80mm的绵毡,浸入到预混胶液中,轻轻按压保证其全部浸润。使用双辊轧去部分胶液,控制绵毡上的残留胶量为绵毡自身重量的5倍。浸轧后的绵毡在90℃烘箱下保持5h,使其完全发泡固化。
实施例2:
称取纳米氧化锌粉体1g,再用按纯水、发泡PU胶液(粘度为10000mPa·s)按照重量比1:50:500称取,在烧杯中搅拌约30s进行均匀预混合。取一块尺寸(长×宽×厚)为200mm×200mm×80mm的绵毡,浸入到预混胶液中,轻轻按压保证其全部浸润。使用双辊轧去部分胶液,控制绵毡上的残留胶量为绵毡自身重量的20倍。浸轧后的绵毡在60℃烘箱中保持6h,使其完全发泡固化。
实施例3:
称取纳米二氧化钛粉体颗粒1g,再用按纯水、发泡PU胶液(粘度为10000mPa·s)按照重量比1:50:500称取,在烧杯中搅拌约30s进行均匀预混合。取一块尺寸(长×宽×厚)为200mm×200mm×80mm的绵毡,浸入到预混胶液中,轻轻按压保证其全部浸润,控制绵毡上的残留胶量为绵毡自身重量的28倍。使用双辊轧去部分胶液。浸轧后的绵毡50℃烘箱中保持8h,使其完全发泡固化。
实施例4:
称取纳米二氧化钛粉体颗粒1g,再用按纯水、发泡PU胶液(粘度为10000mPa·s)按照重量比1:50:500称取,在烧杯中搅拌约30s进行均匀预混合。取一块尺寸(长×宽×厚)为200mm×200mm×80mm的绵毡,浸入到预混胶液中,轻轻按压保证其全部浸润,控制绵毡上的残留胶量为绵毡自身重量的2倍。使用双辊轧去部分胶液。浸轧后的绵毡在室温下保持36h,使其完全发泡固化,得到泡体的绵块。分析发现泡孔较小,质地偏硬,弹性大。
实施例5 测试与结果
(1)电镜扫描
对实施例中制备的织物产品进行电镜扫描,得到的电镜扫描图见附图1-2。其中,图1是实施例1得到制品的SEM图像,可以看到其有几个至毫米级别的大小不等的孔洞,整体泡孔较大且整体手感较硬;图2是实施例2得到的产品的SEM图像,其孔洞直径在几十至几百微米,泡孔大小不均匀,且空腔体比较圆润,整体上手感柔软,比较符合使用的要求。图3是实施例3得到的产品的SEM图像,发泡体的绵块泡孔大小均匀,宏观的手感弹性较大。
(2)回弹性能
按照GB/T10807《软质泡沫聚合材料 硬度的测定(压陷法)》,对实施例2所得的织物产品、未经处理的原绵以及实施例2所得的织物产品经5次水洗后的试样进行了30000次50%的压缩量测试,结果如表1所示。其中,水洗的条件为水温30℃,单次洗涤时间30min,洗衣机转速800r/min。
表1 直立绵的弹性回复性测试
表1表明,原绵的压陷回复率为82%,实施例2中的织物产品为94.4%。且实施例2水洗后为88.8%,仍保持了比原直立绵更高的回弹性。表明了实施例2的织物产品优良的耐水洗效果。
(3)抗菌性能
按照GB/T 20944.1《纺织品 抗菌性能的评价 第1部分:琼脂扩散法》来进行测定抗菌性能。
将实施例2得到的织物制品,经过细菌培养并在紫外照射之后,可以得到宽度约为3.4mm的抑菌圈,如图4所示。对实施例2得到的织物制品进行20次的模拟水洗,再次进行抗菌性能的测试,仍然可以测得1.5mm的抑菌圈,表明了织物产品本身以及水洗后都具有良好的抗菌效果。其中,模拟水洗的条件为水温30℃,单次洗涤时间30min,洗衣机转速800r/min。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,包括以下步骤:将纳米光触媒材料与聚氨酯发泡胶液进行混合得到混合胶液;将织物浸入所述混合胶液中,并控制浸胶后织物上的残留胶量;使浸胶织物中的胶液发泡固化,得到所述发泡PU负载纳米光触媒材料的织物。
2.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述混合胶液中所述纳米光触媒材料与聚氨酯发泡胶液的重量比为1:100~500。
3.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述混合胶液中聚氨酯发泡胶液与水的质量比为5~10:1。
4.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述的聚氨酯发泡胶液的粘度为25℃下5000~10000mPa·s。
5.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述残留胶量为1~30倍的织物的重量。
6.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述织物为化纤、毛、麻、丝绸、绵中的一种或多种。
7.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述纳米光触媒材料为金属氧化物、硫化物、石墨烯及其衍生物、碳氮催化材料的一种或多种。
8.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述发泡固化的工艺参数为固化温度50℃~100℃,固化时间为4~40h。
9.根据权利要求1所述的发泡PU负载纳米光触媒材料的织物的制备方法,其特征在于,所述步骤还包括在将发泡固化后的材料的上下表面削去薄层,以获得平整的表面。
10.一种根据权利要求1所述的制备方法制备得到的发泡PU负载纳米光触媒材料的织物。
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