CN106149460B - 高强度高抗菌性防水型导电纸及其制备方法 - Google Patents

高强度高抗菌性防水型导电纸及其制备方法 Download PDF

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CN106149460B
CN106149460B CN201610527643.0A CN201610527643A CN106149460B CN 106149460 B CN106149460 B CN 106149460B CN 201610527643 A CN201610527643 A CN 201610527643A CN 106149460 B CN106149460 B CN 106149460B
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刘凯
黄六莲
陈礼辉
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Fujian Agriculture and Forestry University
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Abstract

一种高强度高抗菌性防水型导电纸及其制备方法,所述制备方法将硝酸银与纳米纤维素悬浮液混合均匀后,加入硼氢化钠溶液,反应制备出纳米纤维素固载纳米银复合物,再加入苯胺和过硫酸铵后制得纳米纤维素/银/聚苯胺复合物,最后加入蜂蜡,在高温下搅拌均匀后,得到纳米纤维素/银/聚苯胺/蜂蜡复合物,将所得复合物涂布在纸张表面,即得高强度高抗菌性防水型导电纸。本发明利用纳米纤维素/银/聚苯胺/蜂蜡复合物使得纸张同时具有高强度、高抗菌性、防水性和导电性,使其具有较高的应用价值。

Description

高强度高抗菌性防水型导电纸及其制备方法
技术领域
本发明涉及一种高强度高抗菌性防水型导电纸及其制备方法。
背景技术
导电纸是一种具有导电性的特种功能纸,目前已广泛地用作热电照相纸、电敏纸和电印刷纸等。导电纸的主要原料是纤维素纤维,纤维素纤维能够吸附很多微生物,而这些微生物如果温度适宜,就会迅速繁殖,长时间会导致导电纸的分解变性。另外,纤维素纤维具有很强的亲水性及较低的抗张强度,使得导电纸的防水性很差及物理强度偏低。纤维素纤维的这些缺点严重影响了导电纸的使用价值。因此,研究和开发具有高强度、高抗菌性以及防水型的导电纸具有重要的意义。
发明内容
本发明要解决的技术问题,在于提供一种高强度高抗菌性防水型导电纸的制备方法。
本发明是这样实现的:一种高强度高抗菌性防水型导电纸的制备方法,包括以下步骤:
(1)将硝酸银加入到质量分数为0.1%的纳米纤维素悬浮液中,搅拌至硝酸银完全溶解,然后滴加5g/L~30g/L的硼氢化钠溶液,反应后得到纳米纤维素/银复合物悬浮液;所述硼氢化钠、硝酸银与纳米纤维素的质量比为1:1-5:1-5;
(2)往所述纳米纤维素/银复合物中加入苯胺,混合均匀,滴加5g/L~15g/L过硫酸铵溶液,反应后得到纳米纤维素/银/聚苯胺复合物;所述过硫酸铵、苯胺与纳米纤维素的质量比为1:10-50:1-5;
(3)往纳米纤维素/银/聚苯胺复合物中加入蜂蜡,且蜂蜡与纳米纤维素质量比为1-5:1,加热至80℃,同时高速搅拌,获得纳米纤维素/银/聚苯胺/蜂蜡复合物;将所述纳米纤维素/银/聚苯胺/蜂蜡复合物涂布在纸张表面,且涂布量为0.5g/m2-2g/m2,烘干即得产品。
进一步地,所述硼氢化钠溶液的浓度为20g/L。
进一步地,所述硼氢化钠与硝酸银的质量比为1:3。
进一步地,所述过硫酸铵与苯胺的质量比为1:20-50。
进一步地,所述步骤(3)中,纳米纤维素/银/聚苯胺/蜂蜡复合物在纸张表面的涂布量为1g/m2~2g/m2纸。
本发明要解决的技术问题之二,在于提供一种所述的高强度高抗菌性防水型导电纸。
本发明是这样实现的:一种所述的高强度高抗菌性防水型导电纸,其特征在于:包括纸张和均匀涂布于纸张上的纳米纤维素/银/聚苯胺/蜂蜡复合物;所述纳米纤维素/银/聚苯胺/蜂蜡复合物包括以下重量份的各成分:
本发明的优点在于:大幅度提高导电纸的横向抗张强度和纵向抗张强度,对大肠杆菌和金黄色葡萄球菌具有很强的抑菌率,同时具有较强的抗水性能和优良的导电性能。
具体实施方式
实施例1
(1)将0.1g硝酸银加入到100g 0.1%的纳米纤维素悬浮液中,搅拌使得硝酸银完全溶解,然后滴加5ml 20g/L硼氢化钠溶液,反应后得到纳米纤维素/银复合物悬浮液;
(2)在纳米纤维素/银复合物中加入2g苯胺,混合均匀后,滴加5ml10g/L过硫酸铵溶液,反应后得纳米纤维素/银/聚苯胺复合物;
(3)在纳米纤维素/银/聚苯胺复合物中加入0.5g蜂蜡,加热至80℃使得蜂蜡完全溶解,高速搅拌,制得纳米纤维素/银/聚苯胺/蜂蜡复合物;将该纳米纤维素/银/聚苯胺/蜂蜡复合物涂布在纸张表面,并烘干,制得高强度高抗菌性防水型导电纸。纳米纤维素/银/聚苯胺/蜂蜡复合物在纸张表面的涂布量为1g/m2纸。
实施例2
本部分与实施例1不同之处在于:
(1)将0.3g硝酸银加入到200g 0.1%的纳米纤维素悬浮液中,滴加5ml30g/L硼氢化钠溶液;
(2)在纳米纤维素/银复合物中加入1.5g苯胺,滴加5ml 15g/L过硫酸铵溶液;
(3)在纳米纤维素/银/聚苯胺复合物中加入0.6g蜂蜡,纳米纤维素/银/聚苯胺/蜂蜡复合物在纸张表面的涂布量为0.5g/m2纸。
实施例3
(1)将0.125g硝酸银加入到125g 0.1%的纳米纤维素悬浮液中,滴加5ml 5g/L硼氢化钠溶液;
(2)在纳米纤维素/银复合物中加入1.25g苯胺,滴加5ml 5g/L过硫酸铵溶液;
(3)在纳米纤维素/银/聚苯胺复合物中加入0.125g蜂蜡,纳米纤维素/银/聚苯胺/蜂蜡复合物在纸张表面的涂布量为2g/m2纸。
实施例4
本部分与实施例1不同之处在于:
(1)将0.45g硝酸银加入到450g 0.1%的纳米纤维素悬浮液中,滴加5ml 30g/L硼氢化钠溶液;
(2)在纳米纤维素/银复合物中加入1.5g苯胺,滴加10ml 15g/L过硫酸铵溶液;
将实施例1制得的高强度高抗菌性防水型导电纸的各项性能进行测定,结果如表1所示,可以看出,当涂布量为1g/m2时,由于纳米纤维素可以增加纸张纤维之间的结合面积和氢键结合,对导电纸具有较好的增强作用,使得导电纸的横向抗张强度提高53%,纵向抗张强度提高42%;由于蜂蜡具有较强的抗水作用,使得导电纸对水的接触角达到125°;另外,由于纳米银的抗菌作用,使得导电纸同时对大肠杆菌和金黄色葡萄球菌的抑菌率分别达到93%和97%;由于聚苯胺的强导电性,使得导电纸的电导率达到58S/m。
表1导电纸性能检测
(注:涂布量为1g/m2)
纳米纤维素是直径小于100nm的超微细纤维,与非纳米纤维素相比,纳米纤维素具有许多优良特性,如高结晶度、高强度、高亲水性和高透明性等,其在造纸、食品、电子产品、医学等领域有巨大的应用前景。纳米纤维素由于具有纳米尺度,在液相中带有电荷,故可以均匀分散在液相中。因此,纳米纤维素可作为载体固载其他纳米粒子,避免纳米粒子在液相中的絮聚,从而起到分散纳米粒子的作用。在本发明中通过还原法将纳米银粒子首先固载在纳米纤维素上,再通过聚合法将聚苯胺包裹在纳米纤维素表面,最后加入蜂蜡,在高温下溶解后,在高速搅拌下包裹在纳米纤维素表面,从而制备出稳定性良好的纳米纤维素/银/聚苯胺/蜂蜡复合物。
本发明的高强度高抗菌性防水型导电纸由于包含纳米银粒子和蜂蜡,可使导电纸具有高抗菌性和强抗水性;由于包含有聚苯胺,可使导电纸具有优良的导电性能;由于包含有纳米纤维素,可对导电纸表面起到增强作用;本发明的高强度高抗菌性防水型导电纸的横向抗张强度提高53%,纵向抗张强度提高42%,对大肠杆菌和金黄色葡萄球菌的抑菌率分别达到93%和97%,同时具有较强的抗水性能(对水的接触角达到125°)和优良的导电性能(电导率达到58S/m)。

Claims (6)

1.一种高强度高抗菌性防水型导电纸的制备方法,其特征在于:包括以下步骤:
(1)将硝酸银加入到质量分数为0.1%的纳米纤维素悬浮液中,搅拌至硝酸银完全溶解,然后滴加5g/L~30g/L的硼氢化钠溶液,反应后得到纳米纤维素/银复合物悬浮液;所述硼氢化钠、硝酸银与纳米纤维素的质量比为1:1-5:1-5;
(2)往所述纳米纤维素/银复合物中加入苯胺,混合均匀,滴加5g/L~15g/L过硫酸铵溶液,反应后得到纳米纤维素/银/聚苯胺复合物;所述过硫酸铵、苯胺与纳米纤维素的质量比为1:10-50:1-5;
(3)往纳米纤维素/银/聚苯胺复合物中加入蜂蜡,且蜂蜡与纳米纤维素质量比为1-5:1,加热至80℃,同时高速搅拌,获得纳米纤维素/银/聚苯胺/蜂蜡复合物;将所述纳米纤维素/银/聚苯胺/蜂蜡复合物涂布在纸张表面,且涂布量为0.5g/m2-2g/m2,烘干即得产品。
2.如权利要求1所述的高强度高抗菌性防水型导电纸的制备方法,其特征在于:所述硼氢化钠溶液的浓度为20g/L。
3.如权利要求1所述的高强度高抗菌性防水型导电纸的制备方法,其特征在于:所述硼氢化钠与硝酸银的质量比为1:3。
4.如权利要求1所述的高强度高抗菌性防水型导电纸的制备方法,其特征在于:所述过硫酸铵与苯胺的质量比为1:20-50。
5.如权利要求1所述的高强度高抗菌性防水型导电纸的制备方法,其特征在于:所述步骤(3)中,纳米纤维素/银/聚苯胺/蜂蜡复合物在纸张表面的涂布量为1g/m2~2g/m2纸。
6.一种如权利要求1所述的高强度高抗菌性防水型导电纸,其特征在于:包括纸张和均匀涂布于纸张上的纳米纤维素/银/聚苯胺/蜂蜡复合物;所述纳米纤维素/银/聚苯胺/蜂蜡复合物包括以下重量份的各成分:
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