CN105734959A - 一种镀银纤维的制备方法 - Google Patents
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- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 claims description 2
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 2
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- 229940074439 potassium sodium tartrate Drugs 0.000 claims description 2
- 239000012279 sodium borohydride Substances 0.000 claims description 2
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- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
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Abstract
本发明涉及一种镀银纤维的制备方法,包括如下步骤:第一步:基材表面的化学改性处理,增加基材纤维表面的活性基团和粗糙度;第二步:活化处理,在基材纤维表面直接引入活性点;第三步:化学镀银处理,在基材纤维表面镀覆一层银层。本发明制备的镀银涤纶纤维具有良好的导电性和优异的抗菌性,保留了原有纤维的特性,手感柔软,且镀覆层不易剥落。
Description
技术领域
本发明涉及一种材料的制备方法,更具体地说,它涉及一种镀银纤维的制备方法。
背景技术
众所周知在所有的金属当中银具有最好的导电性能,另外,金属银还具有优异的广谱抗菌效果,且化学性质稳定,对人体无害。鉴于金属银的这些特性,镀银纤维被广泛地应用在日常生活方面,例如,电磁屏蔽面料,抗菌防臭面料等。
镀银纤维的制作工艺大体上可分为化学电镀和真空镀膜。真空镀膜因需要特殊的设备,不适合大规模的工业生产。在化学电镀过程中,为了保证银层能够顺利地镀覆在基材的表面上,基材的表面必须事前活化。通常这种活化是通过氯化锡处理来进行的,其目的就是在基材的表面上通过化学结合将锡离子固定在其表面,然后再利用固定在表面上的锡作为活性点开始后续的银层镀覆过程。严格的说,银的镀层与基材的表面只有在这个活性点的地方才有牢固的化学结合,这个点相当于一个锚固点。由于普通的基材纤维,例如涤纶纤维、尼龙纤维和丙纶纤维的表面只要极少的可与锡离子结合的活性基团,因此能在其表面引进的锚固点是相当有限的,由此可以推测最终的镀层与基材表面的结合并非十分牢固。除去这种化学结合的因素之外,基材表面的物理状态,例如表面的粗糙度对镀层的牢固度也有很重要的影响。粗糙的表面有利于物理镶嵌,换言之有利于增强镀层的牢固度。不过这种物理上的因素往往在实际中被忽略掉了,因为还没有任何可行的物理方法将光滑的纤维表面粗糙化。
基于上面物理和化学两个方面的因素来考虑,我们认为只将基材表面简单地活化然后进行化学镀覆而得到的镀银纤维在特殊的情况下,例如长时间反复受到强力的摩擦时其镀层极有可能从基材表面上剥落下来,从而丧失其功效。
发明内容
针对现有技术存在的不足,本发明的目的在于提供一种镀银纤维的制备方法,解决现有镀银纤维中银镀层与基材纤维之间的结合力不够的缺陷。
为实现上述目的,本发明提供了如下技术方案:
一种镀银纤维的制备方法具体过程如下:
第一步:将基材纤维进行化学处理,增加基材纤维表面的活性基团和粗糙度;
第二步:将化学处理后的基材纤维进行活化处理,在基材纤维表面引进活化点;
第三步:将活化处理后的基材纤维进行化学电镀处理,在基材纤维表面镀覆一层银层。
其中第一步的化学处理过程为:将基材纤维放入1-20g/L的碱性水溶液中,在110-150℃浸渍30-120min后,取出,用去离子水漂洗干净,其中所述碱性水溶液为氢氧化钠、氢氧化钾、碳酸钠或碳酸钾等强碱性溶液。
第二步的活化处理过程为:将第一步化学处理所得基材纤维放入1-15g/L的二氯化锡水溶液中浸渍1-20min后,取出,用去离子水漂洗干净。
第三步的化学镀银的具体过程如下:
1)配置银盐溶液:其中银盐溶液包括硝酸银、络合剂和还原剂,其各组分浓度为:硝酸银1-10g/L;络合剂1-15mL/L;还原剂0.3-20g/L;
其中络合剂为氨水或二乙胺;通常使用的还原剂为葡萄糖、酒石酸钠钾、甲醛、水合肼、硼氢化钠等。
2)将第二步活化处理所得基材纤维浸入银盐溶液中,保持温度在15-45℃,搅拌30-240min后取出,用热水漂洗干净,得到表面上镀覆有银的镀银纤维。
本发明有益效果:本发明是通过对涤纶纤维进行化学改性来增加其表面活性基团和化学腐蚀来增加其表面粗糙度,以提高后续镀层与基材之间的结合牢固度,活化基材纤维表面直接引入后续镀银反应的活化点,然后再利用化学电镀方法在基材纤维上镀覆一层银,最终制备不易剥落的镀银纤维。本发明制得的镀银纤维具有优异的导电性和抗菌性,保留了原有纤维的特性,手感柔软,且镀覆层不易剥落。
附图说明
图1为实施例1的镀银涤纶纤维的扫描电子显微镜图片。
具体实施方式
下面以具体的实例对本发明做进一步阐述,其中基材纤维以涤纶纤维举例说明,仅用于说明,并不限制发明的范围。
实施例1:
一种镀银纤维的制备方法具体过程如下:
第一步,将涤纶纤维浸入5g/L的氢氧化钠水溶液,在130℃搅拌反应60min后取出,用去离子水漂洗干净。
第二步,将第一步处理所得纤维浸入10g/L的二氯化锡水溶液,室温下浸泡2min后取出,用去离子水漂洗干净。
第三步,将第二步活化处理所得涤纶纤维浸入银盐溶液中,该银盐溶液的组成为:硝酸银3g/L,氨水3.5mL/L,福尔马林1.3mL/L;20-30℃搅拌反应180min后取出,用热水漂洗干净。
测试表明,这种镀银纤维具有优异的抗菌效果,对金黄色葡萄球菌的抑菌率大于99.9%,保留了原有纤维的特性,手感柔软,且镀覆层不易剥落,可在多种纺织品中得到应用。
实施例2:
第一步,将涤纶纤维浸入10g/L的氢氧化钾水溶液,在120℃搅拌反应90min后取出,用去离子水漂洗干净。
第二步,将第一步处理过的纤维浸入10g/L的二氯化锡水溶液,室温下浸泡2min后取出,用去离子水漂洗干净。
第三步,将第二步活化处理过的涤纶纤维浸入银盐溶液中,该银盐溶液的组成为:硝酸银7.5g/L,氨水8.7mL/L,福尔马林3mL/L;20-30℃搅拌反应180min后取出,用热水漂洗干净。
测试表明,这种镀银纤维具有优异的抗菌效果,对金黄色葡萄球菌的抑菌率大于99.9%,保留了原有纤维的特性,手感柔软,且镀覆层不易剥落,可在多种纺织品中得到应用。
以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (10)
1.一种镀银纤维的制备方法,其特征是:包括如下步骤:
第一步:将基材纤维进行化学处理,增加基材纤维表面的活性基团和粗糙度;
第二步:将化学处理后的基材纤维进行活化处理,在基材纤维表面引进活化点;
第三步:将活化处理后的基材纤维进行化学电镀处理,在基材纤维表面镀覆一层银层。
2.根据权利要求1所述的一种镀银纤维的制备方法,其特征是:其中基材纤维的化学处理过程为:将基材纤维在碱性水溶液中浸渍处理,取出并用去离子水漂洗干净。
3.根据权利要求2所述的一种镀银纤维的制备方法,其特征是:所述碱性水溶液为氢氧化钠、氢氧化钾、碳酸钠或碳酸钾的水溶液。
4.根据权利要求2所述的一种镀银纤维的制备方法,其特征是:所述碱性水溶液,其浓度为1-20g/L。
5.根据权利要求2所述的一种镀银纤维的制备方法,其特征是:所述浸渍处理,其处理温度为110-150℃。
6.根据权利要求2所述的一种镀银纤维的制备方法,其特征是:所述浸渍处理,其处理时间为30-120min。
7.根据权利要求1所述的一种镀银纤维的制备方法,其特征是:其中活化处理过程为:将第一步化学处理所得的基材纤维在1-15g/L的二氯化锡水溶液中浸渍1-20min,取出并用去离子水漂洗干净。
8.根据权利要求1所述的一种镀银纤维的制备方法,其特征是:其中化学镀银处理过程如下:
1)、配置银盐溶液:其中银盐溶液包括硝酸银、络合剂和还原剂,其各组分浓度为:硝酸银1-10g/L;络合剂1-15mL/L;还原剂0.3-20g/L;
2)、将第二步活化处理所得基材纤维浸入银盐溶液中,保持温度在15-45℃,搅拌30-240min后取出,用热水漂洗干净,得到表面上镀覆有银的镀银纤维。
9.根据权利要求8所述的一种镀银纤维的制备方法,其特征是:所述络合剂为氨水或二乙胺;所述还原剂为葡萄糖、酒石酸钠钾、甲醛、水合肼或硼氢化钠。
10.根据权利要求1所述的一种镀银纤维的制备方法,其特征是:所述基材纤维为涤纶纤维。
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