CN112281503A - 一种柔性石墨烯/钡铁氧体复合织物及其制备方法 - Google Patents

一种柔性石墨烯/钡铁氧体复合织物及其制备方法 Download PDF

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CN112281503A
CN112281503A CN202011074376.9A CN202011074376A CN112281503A CN 112281503 A CN112281503 A CN 112281503A CN 202011074376 A CN202011074376 A CN 202011074376A CN 112281503 A CN112281503 A CN 112281503A
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赵晓明
王欢欢
刘元军
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Tianjin Polytechnic University
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Abstract

本发明公开了一种柔性石墨烯/钡铁氧体复合织物及其制备方法，制备步骤为：(1)涂料的制备：a、称取一定质量的石墨烯、钡铁氧体以及树脂。b、将树脂进行搅拌，在搅拌过程中，加入石墨烯，再提高转速搅拌一定时间，搅拌过程中缓慢滴加消泡剂和增稠剂，使其均匀分散。c、同步骤二，向树脂中缓慢加入钡铁氧体粉末，制备钡铁氧体涂料。(2)涂层织物的制备：a、将导电织物平整地固定在针板架上。b、选定涂层厚度与涂层速度，将涂料均匀涂覆于织物表面，并改变两种涂料的涂层顺序(先涂石墨烯，再涂钡铁氧体；先涂钡铁氧体，再涂石墨烯)，分别制备两种复合织物。c、将涂好的织物放置在烘箱中烘干，得到柔性石墨烯/钡铁氧体复合织物。

Description

一种柔性石墨烯/钡铁氧体复合织物及其制备方法
技术领域
本发明属于电磁屏蔽织物技术领域，具体涉及磁性钡铁氧体掺杂石墨烯复合织物及其制备方法
背景技术
随着电子信息技术的发展，电磁波广泛存在于人们的日常生活中，已经成为重要的环境污染源之一。电磁波不仅会干扰飞机、雷达等军用电子设备的信号，还对人体的健康有潜在威胁，所以新型电磁屏蔽材料的研发具有重要意义。
屏蔽材料作为预防电磁污染的有效手段，已广泛应用到军用领域和民用领域。然而，单一的屏蔽材料很难同时满足屏蔽能力强、频带宽、厚度薄、质量轻和稳定性好的发展理念，所以复合屏蔽材料已成为目前主要的发展趋势。
电磁屏蔽效果与屏蔽材料在电磁波中产生的表面和内部的感应电流和极化现象有关，优异的导电性能有利于在高频电磁场的作用下产生电场对电磁波能量进行衰减，故常见的电磁屏蔽材料通常是一些导电材料或着导磁材料，通过材料的导电或导磁作用来屏蔽电磁波，如碳材料、磁性铁氧体等被广泛应用于电磁屏蔽领域。
石墨烯作为新型碳材料，因其密度小、导电性好、比表面积大等优良特性被认为在吸波领域具有良好的发展前景。但石墨烯的阻抗匹配较差且容易发生团聚，所以不宜单独作为吸波剂使用。为使石墨烯更加充分地发挥它的性能优势，将其与磁性材料复合，是增强吸波能力的一种有效途径。
钡铁氧体是有着类似结构的六角晶系铁氧体，具有较高的复磁导率和介电常数，热稳定性好，同时拥有较宽的频段范围，是良好的电磁屏蔽材料。在电磁能转换理论中，通过电损耗和磁损耗相互匹配是可以有效衰减电磁波，即磁性和导电性质的互补性可以有效地调整电磁参数，从而提高电磁屏蔽性能。
以金属纤维导电织物为基布，石墨烯和钡铁氧体为功能粒子，聚氨酯树脂为粘结剂，制备了柔性石墨烯/钡铁氧体复合织物。其中，金属纤维导电织物也可以实现电损耗作为防护层，所以此复合织物屏蔽性能良好。
发明内容
本发明为解决上述技术问题，提供了一种柔性石墨烯/钡铁氧体复合织物及其制备方法。
为实现上述目的，本发明采用以下技术方案：
一种柔性石墨烯/钡铁氧体复合织物，包括以下步骤：
涂料的制备：
(1)称取一定质量的石墨烯、钡铁氧体粉末以及聚氨酯树脂。
(2)将树脂用强力搅拌机以一定转速搅拌，在搅拌过程中，向树脂中加入石墨烯粒子，再提高转速搅拌一定时间，搅拌过程中缓慢滴加消泡剂与增稠剂，使其均匀分散。
(3)同步骤二，在搅拌过程中，向树脂中缓慢加入钡铁氧体粉末，制备磁性钡铁氧体涂料。
柔性石墨烯/钡铁氧体复合织物的制备：
(1)选用一定长、宽的织物作为基布，并平整地固定在针板架上。
(2)选定涂层厚度与涂层速度，用涂层机将涂料均匀涂覆于织物表面。并改变两种涂料的涂层顺序(①先涂石墨烯，再涂钡铁氧体；②先涂钡铁氧体，再涂石墨烯)，分别制备两种双层涂层织物。
(3)将涂好的织物放置在烘箱中烘干，得到柔性石墨烯/钡铁氧体复合织物。
本发明的优点：
将金属纤维导电织物作为基布，柔软舒适性好，可以作为柔性电磁屏蔽材料。此外，织物中混纺了不锈钢金属纤维，导电织物也属于电损耗型材料，可以单独作为防护层，再加上石墨烯、钡铁氧体的双层涂层，形成有效的导电网络，电损耗、介电损耗和磁损耗相结合，提高了材料的阻抗匹配，此复合织物具有良好的电磁性能。
图1为柔性石墨烯/钡铁氧体复合织物的制备流程图。
图2为实施例制备的柔性石墨烯/钡铁氧体复合织物的屏蔽机理图。
图3为实施例制备的柔性石墨烯/钡铁氧体复合织物的检测数据图。
具体实施方式
本发明提供了一种柔性石墨烯/钡铁氧体复合织物及其制备方法，下面结合具体实施方式对本发明做进一步说明。
实施例1
柔性石墨烯/钡铁氧体复合织物及其制备方法，包括以下步骤：
涂料的制备：
(1)称取100g树脂，3g石墨烯以及30g钡铁氧体粉末。
(2)首先设定单向串激电动机以800rpm/min搅拌树脂，搅拌过程中向树脂中依次加入石墨烯粒子，功能粒子加入完成后将搅拌机转速调高至2000rpm/min，搅拌过程中缓慢滴加适量消泡剂与增稠剂，使涂料混合均匀。
(3)同步骤二，将磁性钡铁氧体粉末加入树脂中，制备钡铁氧体涂料。
柔性石墨烯/钡铁氧体复合织物的制备：
(1)选用30×40cm织物作为基布，平整的固定在针板架上。
(2)首先设置涂层厚度为0.4mm，先将石墨烯涂料均匀涂覆于织物表面，将单层涂层织物置于烘箱中，80℃烘干30min，得到单层涂层织物；然后再次设置厚度，保证第二层涂层还是0.4mm，将钡铁氧体涂料涂敷于织物表面。
(3)将涂敷好涂料的织物置于烘箱中，80℃再次烘干30min，得到柔性石墨烯/钡铁氧体复合织物。
实施例2
柔性石墨烯/钡铁氧体复合织物及其制备方法，包括以下步骤：
涂料的制备：
(1)称取100g树脂，3g石墨烯以及30g钡铁氧体粉末。
(2)首先设定单向串激电动机以800rpm/min搅拌树脂，搅拌过程中向树脂中依次加入石墨烯粒子，功能粒子加入完成后将搅拌机转速调高至2000rpm/min，搅拌过程中缓慢滴加适量消泡剂与增稠剂，使涂料混合均匀。
(3)同步骤二，将磁性钡铁氧体粉末加入树脂中，制备钡铁氧体涂料。
柔性石墨烯/钡铁氧体复合织物的制备：
(1)选用30×40cm织物作为基布，平整的固定在针板架上。
(2)首先设置涂层厚度为0.4mm，先将钡铁氧体涂料均匀涂覆于织物表面，将单层涂层织物置于烘箱中，80℃烘干30min，得到单层涂层织物；然后再次设置厚度，保证第二层涂层还是0.4mm，将石墨烯涂料涂敷于织物表面。
(3)将涂敷好涂料的织物置于烘箱中，80℃再次烘干30min，得到柔性石墨烯/钡铁氧体复合织物。
上述实施方式仅为本发明的优选实施方式，不能以此来限定本发明保护的范围，本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换均属于本发明所要求保护的范围。

Claims (8)

1.一种柔性石墨烯/钡铁氧体复合织物及其制备方法，包括以下步骤：
(1)功能涂料的制备：a、称取一定质量的石墨烯、钡铁氧体粉末及聚氨酯树脂。b、将树脂用强力搅拌机以一定转速搅拌，在搅拌过程中，向树脂中加入石墨烯粒子，再提高转速搅拌一定时间，搅拌过程中缓慢滴加消泡剂和增稠剂，使其均匀分散。c、同步骤二，在搅拌过程中，向树脂中缓慢加入钡铁氧体粉末，制备磁性钡铁氧体涂料。
(2)柔性右墨烯/钡铁氧体复合织物的制备：a、选用一定长、宽的织物作为基布，并平整地固定在针板架上。b、选定涂层厚度与涂层速度，用涂层机将涂料均匀涂覆于织物表面，并改变两种涂料的涂层顺序(先涂右墨烯，再涂钡铁氧体；先涂钡铁氧体，再涂石墨烯)，分别制备两种双层涂层织物。c、将涂好的织物放置在烘箱中烘干，得到柔性右墨烯/钡铁氧体复合织物。
2.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述的织物为金属纤维导电织物。
3.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述的制备方法为刮涂法。
4.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述的树脂为水溶性聚氨酯树脂PU-2540，含固率为40+1％，pH值为7～9(25℃)，粘度＜300mP·S。
5.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述的石墨烯粒径为5～50μm，钡铁氧体粒径为1μm。
6.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述的涂料组成为100份聚氨酯树脂，3份石墨烯，10～50份钡铁氧体，0.1份消泡剂，0.1～1份增稠剂。
7.根据权利要求1所述的一种柔性石墨烯/钡铁氧体复合织物，其特征在于，所述烘箱烘干时的温度为80℃，烘干时间为30min。
8.一种由权利要求1-7中任意一项所述的一种柔性石墨烯/钡铁氧体复合织物的制备方法得到柔性石墨烯/钡铁氧体复合织物。
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