CN109251434A - 一种高性能电磁屏蔽材料的制备方法 - Google Patents
一种高性能电磁屏蔽材料的制备方法 Download PDFInfo
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Abstract
本发明公开了一种高性能的电磁屏蔽材料的制备方法,包括以下步骤:首先以原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂制得中间层;然后对碳纳米管进行镀银处理,然后将其加入到苯胺单体溶液中,并在聚合反应体系中加入椰油酰甘氨酸钠,制得的碳纳米管/聚苯胺复合材料分散稳定性好,并将其与环氧树脂胶黏剂、硬脂酸锌为原料制得表面层。本发明制得的电磁屏蔽材料不仅具有优异的电磁屏蔽效能,且力学性能佳。
Description
技术领域:
本发明涉及电磁屏蔽材料,具体的涉及一种高性能电磁屏蔽材料的制备方法。
背景技术:
随着现代电子工业的高速发展,电子电器和无线电通讯得以普遍使用,电磁辐射己成为继噪声污染、大气污染、水污染、固体废物污染之后的又一大公害。电磁波不仅干扰着各种电子设备的正常运行,威胁通信设备的信息安全,而且对人类的身体健康会产生极大危害。目前消除电磁波危害的主要方法是采用电磁屏蔽材料对其进行屏蔽。因此,探索高效的电磁屏蔽材料已经成为迫切需要解决的问题。
聚苯胺是在电磁屏蔽领域研究最多的导电聚合物之一。它的制备简便、成本较低,并且具有良好的稳定性,高电导率和优异的电磁性能。但是其导电性能和力学性能需要进一步改善。
发明内容:
本发明的目的是提供一种高性能电磁屏蔽材料的制备方法,该方法制得的电磁屏蔽材料屏蔽效能好,热稳定性好,力学性能优异。
为实现上述目的,本发明采用以下技术方案:
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理3-5h,过滤,干燥,制得改性原竹纤维;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在150-200℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.1-0.5mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.1-0.5mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合20-50min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应15-30h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
作为上述技术方案的优选,步骤(1)中,所述原竹纤维、硅烷偶联剂的质量比为2:(0.01-0.02)。
作为上述技术方案的优选,步骤(2)中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为(3-7):(15-25):6。
作为上述技术方案的优选,步骤(3)中,所述镀银碳纳米管中银、碳纳米管的质量比为1:(10-15)。
作为上述技术方案的优选,步骤(4)中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为(4-9):0.3:(0.1-0.5)。
作为上述技术方案的优选,苯胺单体、镀银碳纳米管的质量比为1:(0.2-0.3)。
作为上述技术方案的优选,步骤(6)中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料10-30份、环氧树脂胶黏剂3-5份、硬脂酸锌1-2份。
本发明具有以下有益效果:
本发明制得的电磁屏蔽材料为夹心结构,中间层为原竹纤维改性的聚苯乙烯泡沫材料制得,其力学性能好,热稳定性佳,且为了改善原竹纤维与聚苯乙烯泡沫材料的相容性,本发明首先将原竹纤维材料硅烷偶联剂进行改性,然后将其与基体材料混合,加入胶黏剂混合制得中间层;
表层材料采用碳纳米管改性的聚苯胺复合材料,且为了改善碳纳米管与聚苯胺的相容性,本发明首先对碳纳米管进行镀银处理,有效改善了其导电性能,然后将其加入到苯胺单体溶液中,有效调节各组分的用量以及制备工艺条件,制得的复合材料性能优异,电磁屏蔽效能好。经检测,本发明制得的材料的电磁屏蔽性能为40dB以上。
具体实施方式:
为了更好的理解本发明,下面通过实施例对本发明进一步说明,实施例只用于解释本发明,不会对本发明构成任何的限定。
实施例1
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理3h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.01;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在150℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为3:15:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.1mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.1mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为4:0.3:0.1;苯胺单体、镀银碳纳米管的质量比为1:0.2;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合20min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应15h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料10份、环氧树脂胶黏剂3份、硬脂酸锌1份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
实施例2
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理5h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.02;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在200℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为7:25:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.5mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.5mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为9:0.3:0.5;苯胺单体、镀银碳纳米管的质量比为1:0.3;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合50min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应30h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料30份、环氧树脂胶黏剂5份、硬脂酸锌2份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
实施例3
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理3.5h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.01;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在160℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为4:17:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.2mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.2mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为5:0.3:0.2;苯胺单体、镀银碳纳米管的质量比为1:0.22;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合30min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应18h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料15份、环氧树脂胶黏剂3.5份、硬脂酸锌1.2份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
实施例4
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理4h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.015;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在170℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为5:19:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.3mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.3mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为6:0.3:0.2;苯胺单体、镀银碳纳米管的质量比为1:0.25;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合35min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应21h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料20份、环氧树脂胶黏剂4份、硬脂酸锌1.4份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
实施例5
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理4h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.015;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在170℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为6:21:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.3mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.35mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为7:0.3:0.35;苯胺单体、镀银碳纳米管的质量比为1:0.2;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合40min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应24h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料25份、环氧树脂胶黏剂4份、硬脂酸锌1.6份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
实施例6
一种高性能电磁屏蔽材料的制备方法,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理3-5h,过滤,干燥,制得改性原竹纤维;其中,所述原竹纤维、硅烷偶联剂的质量比为2:0.02;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在180℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;其中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为6.5:23:6;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.4mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.4mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;其中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为8.5:0.3:0.45;苯胺单体、镀银碳纳米管的质量比为1:0.3;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合40min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应28h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;其中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料28份、环氧树脂胶黏剂4.5份、硬脂酸锌1.8份;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
Claims (7)
1.一种高性能电磁屏蔽材料的制备方法,其特征在于,包括以下步骤:
(1)将原竹纤维置于硅烷偶联剂的乙醇溶液中,浸泡处理3-5h,过滤,干燥,制得改性原竹纤维;
(2)将原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂在150-200℃下混合均匀,由挤出机挤出造粒,制得混合物料,然后热压成型,制得中间层;
(3)将碳纳米管表面进行镀银处理,制得镀银碳纳米管;
(4)制备摩尔浓度为0.1-0.5mol/L的盐酸水溶液,并加入苯胺单体,在冰水浴中搅拌混合均匀,制得混合液A;将引发剂、椰油酰甘氨酸钠加入到0.1-0.5mol/L的盐酸水溶液中,冰水浴中搅拌混合均匀,制得混合液B;
(5)冰水浴条件下向混合液B中加入步骤(3)中制得的镀银碳纳米管,搅拌混合20-50min,然后滴加步骤(4)制得的混合液A,边滴加边搅拌,滴加结束后继续搅拌反应15-30h,反应结束后离心处理,得到的沉淀采用去离子水洗涤,制得碳纳米管/聚苯胺复合材料;
(6)将上述制得的碳纳米管/聚苯胺复合材料、环氧树脂胶黏剂、硬脂酸锌加入到混炼机中150℃下混炼处理5-10min,制得混合物料,将上述混合物料由双螺杆挤出机造粒,最后热压成型,制得表面层;
(7)将上述制得的表面层、中间层、表面层依次层叠,层与层之间采用环氧树脂胶黏剂粘接,热压处理,制得电磁屏蔽材料。
2.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于:步骤(1)中,所述原竹纤维、硅烷偶联剂的质量比为2:(0.01-0.02)。
3.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于:步骤(2)中,原竹纤维、聚苯乙烯泡沫颗粒、环氧树脂胶黏剂的质量比为(3-7):(15-25):6。
4.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于:步骤(3)中,所述镀银碳纳米管中银、碳纳米管的质量比为1:(10-15)。
5.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于:步骤(4)中,苯胺单体、引发剂、椰油酸甘氨酸钠的质量比为(4-9):0.3:(0.1-0.5)。
6.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于:苯胺单体、镀银碳纳米管的质量比为1:(0.2-0.3)。
7.如权利要求1所述的一种高性能电磁屏蔽材料的制备方法,其特征在于,步骤(6)中,各组分的用量以重量份计分别为:碳纳米管/聚苯胺复合材料10-30份、环氧树脂胶黏剂3-5份、硬脂酸锌1-2份。
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CN116959765A (zh) * | 2023-07-21 | 2023-10-27 | 安徽华铠工程科技有限公司 | 一种有机-无机杂化增强的中子和γ射线复合屏蔽结构材料 |
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CN116959765A (zh) * | 2023-07-21 | 2023-10-27 | 安徽华铠工程科技有限公司 | 一种有机-无机杂化增强的中子和γ射线复合屏蔽结构材料 |
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Application publication date: 20190122 |