CN105820716B - 一种抗雷击涂料及其制备方法 - Google Patents
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Abstract
本发明属于功能纳米涂料制备领域。本发明的抗雷击涂料包括:金属氧化物、镀银铜片和聚合物基体。其主要成分为50~75份低温固化树脂、1~10份金属氧化物、5~15份镀银铜片、30~50份溶剂、0.1~20份分散剂、0.5~3份消泡剂;低温固化树脂是环氧树脂、醇酸树脂、带羟基的丙烯酸树脂和聚氨酯树脂的复合;金属氧化物是氧化锌、氧化铝、氧化钴、氧化锑的复合;分散剂为有机膨润土分散剂、气相二氧化硅或高分子羧酸。本发明的涂料在保留高分子涂料良好的附着力、耐冲击性和稳定性基础上,具备金属氧化物的大电流耐受能力和镀银铜片的优异导热导电能力,从而具备优异的抗雷击性能。该涂料制备的涂层可以用于飞机、油罐及风电叶片等的抗雷击防护。
Description
技术领域
本发明属于功能纳米涂料制备领域,具体涉及一种抗雷击涂料及其制备方法。
背景技术
雷电是常见的自然现象,在地球的大气层中,平均每天发生约800万次闪电。复合材料因具有优异的比强度和比刚度而越来越被广泛地应用于飞机结构和大型风电叶片结构。但也因其电磁屏蔽性能的缺失使得复合材料构件更容易遭受雷击。先进复合材料在没有雷击防护层的情况下,雷击将导致结构失效或大面积破坏(张耀良,韩广才.航空材料学[M].哈尔滨:哈尔滨工程大学出版社,2002.陈雷,张向东,黎华.复合材料风电叶片避雷防护研究进展.材料开发与应用,2013,107-110.)。传统的复合材料构件的防雷措施是在其表面蒙上金属蒙皮或者贴上金属条,但是金属蒙皮和金属条会增加复合材料构件本身的重量,会直接影响飞行器和风电叶片的运行效率。
涂料是有机或者无机材料能够涂覆在物件表面性能连续薄膜的材料,在现代科技和工业领域应用广泛。随着科技的发展,涂料已不仅仅是原来的保护和装饰作用,而是通过加入一些功能填料得到具有特定功能的功能性涂料。
专利CN101984009A发明名称为一种抗雷击导电涂料及其制备方法的专利,将银粉、醋酸丁酸纤维素酯、分散剂、有机硅树脂、邻苯二甲酸二丁酯及消泡剂混合,再用醋酸丁酯将其稀释后充分研磨、使填料分散均匀即得到抗雷击导电涂料。但是该方法中仅利用了金属银粉的导电性能,且金属银价格昂贵,不适用于大面积的涂料使用。
发明内容
针对现有技术问题,本发明提出一种新型抗雷击涂料。
本发明的技术方案如下:
本发明提供的抗雷击涂料,其组成成分按重量份计包括:50~75份低温固化树脂、1~10份金属氧化物、5~15份镀银铜片、30~50份溶剂、0.1~20份分散剂和0.5~3份消泡剂。
根据本发明的抗雷击涂料,其中,所述低温固化树脂包括环氧树脂、醇酸树脂和带羟基的丙烯酸树脂中的一种或几种。
根据本发明的抗雷击涂料,其中,所述金属氧化物包括氧化锌、氧化铝、氧化钴和氧化锑中的一种或几种。
根据本发明的抗雷击涂料,其中,所述镀银铜片中银的质量百分比为8%~20%,作为优选,所述镀银铜片的直径为10~100μm。
根据本发明的抗雷击涂料,其中,所述分散剂为有机膨润土分散剂、气相二氧化硅或高分子羧酸。
根据本发明的抗雷击涂料,其中,所述溶剂包括芳香烃类、醇类和脂类有机溶剂中的一种或几种。
本发明提供的上述抗雷击涂料的制备方法,包括以下步骤:
将低温固化树脂、金属氧化物、镀银铜片、分散剂和消泡剂按照50~75份低温固化树脂、1~10份金属氧化物、5~15份镀银铜片、30~50份溶剂、0.1~20份分散剂、0.5~3份消泡剂的比例混合均匀,制得抗雷击涂料。
本发明还提供了上述抗雷击涂料的在非金属复合材料中的应用,具体的应用例如可以是使用常规的喷涂方法喷涂于非金属复合材料表面进行抗雷击防护,进一步地优选地,本发明提供一种上述抗雷击涂料的喷涂方法,包括以下步骤:
向抗雷击涂料中加入涂料质量5%~20%的固化剂,混合均匀后将其喷涂于非金属复合材料表面并固化,得到所述抗雷击涂料涂层。本发明所述的抗雷击涂料适用于本领域公知任意具有防雷要求的非金属复合材料。
根据上述的喷涂方法,其中,所述固化剂可以使用本领域常规的固化剂,例如优选为胺类固化剂、酸酐类固化剂和异氰酸酯。
本发明提供的抗雷击涂料的优点是:
镀银铜片既保持了银片的良好导电导热性能,又降低了银的用量从而降低了材料成本;同时引入具有优异耐大电流性能的金属氧化物,两者的协同作用可以大大提高涂料的耐雷击性能。另外通过不同种类镀银铜片和金属氧化物的优化组合和含量调配可以得到不同电学性能和耐大电流性能的涂料,从而实现抗雷击涂料的可控制备。
附图说明
图1为实施例1中使用氧化锌颗粒的扫描电镜照片。
图2为实施例2中使用镀银铜片的扫描电镜照片。
具体实施方式
下面通过实施例对本发明做进一步详细说明,这些实施例仅用来说明本发明,并不限制本发明的范围。
实施例1
将50g环氧树脂、1g氧化锌、10g镀银铜片(银的质量百分比为8%)、30g复合溶剂(正丁醇)、0.1g有机膨润土分散剂和0.5g消泡剂混合均匀得到涂料。其中氧化锌颗粒的扫描电镜照片见图1中,该氧化锌颗粒为四针状晶须。称取固化剂4.83g加入到上述涂料中,混合均匀,熟化30分钟。将涂料均匀喷涂在玻璃钢复合材料板上,固化后得到涂层。
实施例2
将15g醇酸树脂、50g带羟基的丙烯酸树脂、5g氧化钴、5g氧化锑、5g镀银铜片(银的质量百分比为20%)、40g复合溶剂(二甲苯和醋酸甲酯以2:1比例混合)、15g气相二氧化硅和1.8g消泡剂混合均匀得到涂料。其中镀银铜片的扫描电镜照片见图2中,该镀银铜片直径约为20~50μm。取固化剂29.36g加入到上述涂料中,混合均匀,熟化30分钟。将涂料均匀喷涂在玻璃钢复合材料板上,固化后得到涂层。
实施例3
将40g环氧树脂、20g醇酸树脂、15g带羟基的丙烯酸树脂、4g氧化铝、5g氧化钴、15g镀银铜片(银的质量百分比为20%)、50g复合溶剂(异丙醇和正丁醇以1:2比例混合)、20g高分子羧酸分散剂和3g消泡剂混合均匀得到涂料。称取固化剂34.4g加入到上述涂料中,混合均匀,熟化30分钟。将涂料均匀喷涂在玻璃钢复合材料板上,固化后得到涂层。
实施例4
将60g环氧树脂、5g氧化锌、5g氧化铝、10g镀银铜片(银的质量百分比为20%)、40g复合溶剂(二甲苯和醋酸丙酯醇以5:1比例混合)、10g气相二氧化硅和5g消泡剂混合均匀得到涂料。称取固化剂6.75g加入到上述涂料中,混合均匀,熟化30分钟。将涂料均匀喷涂在玻璃钢复合材料板上,固化后得到涂层。
实施例5
将35g环氧树脂、15g醇酸树脂、10g氧化铝、15g镀银铜片(银的质量百分比为20%)、30g复合溶剂(醋酸乙酯和正丁醇以1:1比例混合)、5g高分子羧酸分散剂和1g消泡剂混合均匀得到涂料。称取固化剂20.2g加入到上述涂料中,混合均匀,熟化30分钟。将涂料均匀喷涂在玻璃钢复合材料板上,固化后得到涂层。
各实施方案得到的涂层附着力、柔韧性、耐大电流冲击性能及电学性能见表1。
表1实施例中得到的五种涂层综合性能对比
由上表可知,各涂层试样的漆膜的附着力、柔韧性较好,其4/10s耐大电流冲击性能优异。
当然,本发明还可以有多种实施例,在不背离本发明精神及其实质的情况下,熟悉本领域的技术人员可根据本发明的公开做出各种相应的改变和变形,但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
Claims (4)
1.一种抗雷击涂料,其特征在于,所述抗雷击涂料的组成成分按重量份计,由以下组分组成:50~75份低温固化树脂、1~10份金属氧化物、5~15份镀银铜片、30~50份溶剂、0.1~20份分散剂和0.5~3份消泡剂;
所述低温固化树脂为环氧树脂、醇酸树脂和带羟基的丙烯酸树脂;
所述金属氧化物为氧化铝和氧化钴;
所述镀银铜片中银的质量百分比为8%~20%;
所述溶剂为醇类;
所述分散剂为高分子羧酸分散剂。
2.根据权利要求1所述的抗雷击涂料,其特征在于,所述镀银铜片的直径为10~100μm。
3.一种权利要求1或2所述抗雷击涂料的制备方法,包括以下步骤:
将低温固化树脂、金属氧化物、镀银铜片、溶剂、分散剂和消泡剂按照比例混合均匀,制得抗雷击涂料。
4.一种权利要求1或2所述抗雷击涂料的喷涂方法,包括以下步骤:
向抗雷击涂料中加入涂料质量5%~20%的固化剂,混合均匀后将其喷涂于非金属复合材料表面并固化,得到所述抗雷击涂料涂层。
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