CN116160723A - 一种t向吸波蜂窝材料及其制备方法 - Google Patents
一种t向吸波蜂窝材料及其制备方法 Download PDFInfo
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Abstract
本申请公开了一种T向吸波蜂窝材料及其制备方法,涉及吸波材料领域,旨在解决现有方法制备获得的吸波蜂窝材料T向(穿过孔格方向)对电磁波的吸收性能不足的技术问题。所述T向吸波蜂窝材料,所述T向吸波蜂窝材料在蜂窝孔洞表面铺叠有吸波层;再在吸波蜂窝吸波层表面铺贴透波层,固化得到吸波蜂窝制件。
Description
技术领域
本申请涉及吸波材料领域,尤其涉及一种T向吸波蜂窝材料及其制备方法。
背景技术
随着电子信息技术的进步,各类电子设备应用于人们生活的方方面面,一方面便捷了人们的生活,另一方面电子设备产生的电磁污染也影响着人们的健康。此外,雷达通讯的进步也极大促进了隐身飞机的发展。因此,电磁波吸收材料在实际应用中具有广泛的应用前景。
蜂窝是利用仿生学原理制备的一种复合材料,外型与自然界的蜂窝相似,能够在保证强度的同时,最大限度的减轻材料的重量,是一种新型的吸波材料,但现有方法制备获得的吸波蜂窝材料对电磁波的吸收性能尤其是T向,由于电磁波穿透孔格无吸收剂阻挡损耗,因此吸波性能较弱,有待提升。
发明内容
本申请的主要目的是提供一种T向吸波蜂窝材料及其制备方法,旨在解决现有方法制备获得的吸波蜂窝材料T向对电磁波的吸收性能不足的技术问题。
为解决上述技术问题,本申请提出了:一种T向吸波蜂窝材料,所述T向吸波蜂窝材料在蜂窝孔洞表面铺叠有吸波层,固化,再于吸波预浸料表面铺贴透波层,固化得到吸波蜂窝制件;为解决上述技术问题,本申请还提出了:一种如上所述T向吸波蜂窝材料的制备方法,包括以下步骤:
将白蜂窝置于吸波剂浸渍液中进行浸润后,取出固化,获得第一吸波蜂窝材料;
将吸波预浸料铺叠在所述第一吸波蜂窝材料蜂窝孔洞表面后进行固化处理,获得第二吸波蜂窝材料;将透波预浸料铺叠在所述吸波预浸料表面进行固化处理,获得T向吸波蜂窝制件。
作为本申请一些可选实施方式,所述吸波预浸料在所述第一吸波蜂窝材料的上表面沿蜂窝孔洞表面进行铺叠,所述吸波预浸料在所述第一吸波蜂窝材料的下表面沿蜂窝表面方向进行铺叠。
作为本申请一些可选实施方式,所述吸波预浸料在所述第一吸波蜂窝材料表面的铺叠厚度为0.5mm~2.5mm。
作为本申请一些可选实施方式,所述吸波预浸料由吸波胶膜和透波纤维复合形成;所述透波纤维包括玻璃纤维、石英纤维、芳纶纤维和聚酰亚胺纤维中至少一种,所述吸波胶膜由吸收剂和树脂组成。
作为本申请一些可选实施方式,所述吸波胶膜的面密度为200g/m2~400g/m2,所述吸波预浸料的面密度为400g/m2~800g/m2。
作为本申请一些可选实施方式,所述吸收剂包括羰基铁和炭黑中的至少一种,所述树脂包括环氧树脂、双马树脂和氰酸酯树脂中的至少一种。
作为本申请一些可选实施方式,所述吸收剂为羰基铁时,所述吸收剂在树脂中的填充量为50wt%~90wt%;所述吸收剂为炭黑时,所述吸收剂在树脂中的填充量为10wt%~40wt%;所述吸收剂为羰基铁和炭黑混合物时,所述吸收剂在树脂中的填充量为30wt%~70wt%。
作为本申请一些可选实施方式,所述树脂为环氧树脂时,所述固化处理的温度为130℃~170℃,时间为3h~8h;所述树脂为双马树脂或氰酸酯树脂时,所述所述固化处理的温度为180℃~230℃,时间为8h。
现有吸波蜂窝材料通常是将成型的白蜂窝浸渍于吸收剂浸渍液中以赋予其吸波性能,但通过这种方法制备获得的吸波蜂窝材料仅蜂窝孔壁上浸润有吸收剂,从而导致所制备的吸波蜂窝材料在沿蜂窝孔洞方向(T向)的吸波性能远低于垂直于蜂窝孔壁方向的吸波性能。而与现有吸波蜂窝材料相比,本申请所述T向吸波蜂窝材料通过在沿蜂窝孔洞表面铺叠有吸波层和透波层,使得T向入射(沿着蜂窝孔洞方向)的电磁波尽可能多地进入到吸波蜂窝材料内部,从而提升吸波蜂窝材料的阻抗匹配特性;另外通过在所述T向吸波蜂窝材料的沿蜂窝孔洞方向表面铺叠有吸波层和透波层,从而对蜂窝孔格进行遮挡,进而降低了电磁波从吸波蜂窝材料内部的透射率从而提升了所述T向吸波蜂窝材料的吸波性能。
附图说明
图1是本申请实施例所述T向吸波蜂窝材料的制备方法流程示意图。
图2是本申请实施例所述T向吸波蜂窝材料的示意图。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
随着电子信息技术的进步,各类电子设备应用于人们生活的方方面面,一方面便捷了人们的生活,另一方面电子设备产生的电磁污染也影响着人们的健康。此外,雷达通讯的进步也极大促进了隐身飞机的发展。因此,电磁波吸收材料在实际应用中具有广泛的应用前景。
蜂窝是利用仿生学原理制备的一种复合材料,外型与自然界的蜂窝相似,能够在保证强度的同时,最大限度的减轻材料的重量,是一种新型的吸波材料,但现有方法制备获得的吸波蜂窝材料对电磁波的吸收性能仍有待提升。
基于发明人研究发现,现有吸波蜂窝材料通常是将成型的白蜂窝浸渍于吸收剂浸渍液以赋予其吸波性能,但通过这种方法制备获得的吸波蜂窝材料仅蜂窝孔壁上浸润有吸收剂,从而导致所制备的吸波蜂窝材料在沿蜂窝孔洞方向的吸波性能远低于垂直于蜂窝壁方向的吸波性能。而与现有吸波蜂窝材料相比,本申请所述T向吸波蜂窝材料通过在沿蜂窝孔洞方向铺叠有吸波层和透波层,从而对蜂窝孔格进行遮挡,进而降低了电磁波从吸波蜂窝材料内部的透射率从而提升了所述T向吸波蜂窝材料的吸波性能。此外采用透波层厚度调节吸波蜂窝的阻抗匹配特性,从而使吸波蜂窝吸收峰落在X波段,从而提升吸波蜂窝吸收性能。
如上所述,为解决现有方法制备获得的吸波蜂窝材料T向对电磁波的吸收性能不足的技术问题,本申请实施例提供了一种T向吸波蜂窝材料,所述T向吸波蜂窝材料在蜂窝孔洞表面铺叠有吸波层,固化,再于吸波预浸料表面铺贴透波层,固化得到吸波蜂窝制件;
基于同样的发明创造,本申请实施例还提供了一种如上所述T向吸波蜂窝材料的制备方法,如图1所示,包括以下步骤:
S10、将白蜂窝置于吸收剂浸渍液中进行浸润后,取出固化,获得第一吸波蜂窝材料。
在具体应用中,将所述白蜂窝置于吸收剂浸渍液中进行浸润后,取出固化,获得第一吸波蜂窝材料,这一步骤是现有技术常用的吸波蜂窝材料的制备工艺,即通过上述步骤赋予第一吸波蜂窝材料在垂直于蜂窝孔壁方向的吸波性能,并将所获得的第一吸波蜂窝材料作为步骤S20的原材料进行
S20、将吸波预浸料铺叠在所述第一吸波蜂窝材料蜂窝孔洞表面后进行固化处理,获得第二吸波蜂窝材料;将透波预浸料铺叠在所述吸波预浸料表面进行固化处理,获得T向吸波蜂窝制件。
在具体应用中,现有的吸波蜂窝材料的蜂窝孔壁上附着有吸波剂,但当电磁波的投入角度未垂直于孔壁时,容易出现部分透过蜂窝孔格的电磁波被探测到;因此为了提升吸波蜂窝材料的T向吸波性能,本申请实施例通过将所述吸波预浸料沿蜂窝孔洞表面向铺叠在第一吸波蜂窝材料表面后进行固化处理,获得沿蜂窝孔洞方向铺叠设置的吸波层,用于提升所述第二吸波蜂窝材料T向的吸波性能。
在具体应用中,为了增加所述第二吸波蜂窝材料的吸波性能,可将所述吸波预浸料铺叠在所述第一吸波蜂窝材料的=两面,但无论是将所述吸波预浸料铺叠在所述第一吸波蜂窝材料的=两面,铺叠方向均是沿蜂窝孔洞表面;即所述吸波预浸料在所述第一吸波蜂窝材料的上表面沿蜂窝孔洞表面进行铺叠,所述吸波预浸料在所述第一吸波蜂窝材料的下表面沿蜂窝孔洞表面进行铺叠。在具体应用中,为了控制所述吸波蜂窝材料的厚度,从而调节所述吸波蜂窝的吸收曲线频率至所需波段;在进行吸波预浸料铺叠时可根据所述第一吸波蜂窝材料的厚度选择所述吸波预浸料的铺叠厚度。在本申请一些可选实施例中,所述吸波预浸料在所述第一吸波蜂窝材料表面的铺叠厚度为0.5mm~2.5mm。
在具体应用中,为了增加所述吸波蜂窝材料的吸波性能,所述吸波预浸料由吸波胶膜和透波纤维复合形成;所述透波纤维包括玻璃纤维、石英纤维、芳纶纤维和聚酰亚胺纤维中至少一种,所述吸波胶膜由吸收剂和树脂组成。这里在所述吸波预浸料中加入纤维是因为在保证吸波性能的同时提升力学承载能力,因此这里所选的纤维为具有良好力学承载性能和透波性能的纤维。
在具体应用中,为了提升吸波蜂窝材料的吸波性能,可以选择透波性能较好的树脂作为吸波胶膜组成,如环氧树脂、双马树脂和氰酸酯树脂中的至少一种;但需要注意的是,这里所用的树脂体系需与后续蒙皮制造时所用的树脂体系为同一体系。另外,需要注意的是,这里树脂的选择不同,后续的固化处理条件也需要进行相应调整,才能达到最好的固化效果,如所述树脂为环氧树脂时,所述固化处理的温度为130℃~170℃,时间为3h~8h;所述树脂为双马树脂或氰酸酯树脂时,所述所述固化处理的温度为180℃~230℃,时间为8h。
在具体应用中,为了尽可能的消耗透射入蜂窝孔格内的电磁波,所述吸收剂包括羰基铁和炭黑中的至少一种。需要注意的是,当所述吸收剂的选择不同时,其在树脂中的填充量也不同;具体来说,所述吸收剂为羰基铁时,所述吸收剂在树脂中的填充量为50wt%~90wt%;所述吸收剂为炭黑时,所述吸收剂在树脂中的填充量为10wt%~40wt%;所述吸收剂为羰基铁和炭黑混合物时,所述吸收剂在树脂中的填充量为30wt%~70wt%。
在具体应用中,可以将所述吸波预浸料的面密度和所述吸波胶膜的面密度进行调整,从而对所述吸波预浸料的厚度和所述吸波胶膜的厚度进行调整,进而对所述吸波蜂窝材料的吸波性能进行调整。在本申请一些可选实施例中,所述吸波胶膜的面密度为200g/m2~400g/m2,所述吸波预浸料的面密度为400g/m2~800g/m2。
S30、将透波预浸料铺叠在所述吸波预浸料表面固化处理,获得吸波蜂窝制件。
为了保证吸波蜂窝材料的透波性能,避免入射电磁波大量反射而被敌方雷达的探测。本申请在获得沿蜂窝孔格表面附着有吸波层的第二吸波蜂窝材料之后,再在所述吸波层表面进行透波预浸料铺叠。在具体应用中,采用透波层厚度调节吸波蜂窝的阻抗匹配特性,从而使吸波蜂窝吸收峰落在X波段,从而提升吸波蜂窝吸收性能。可以看出,本申请所述制备方法通过将白蜂窝置于吸收剂浸渍液中进行浸润后,取出固化,获得第一吸波蜂窝材料;这里所获得的第一吸波蜂窝材料与现有吸波蜂窝材料吸波性能相似,但缺点在于对T向入射的电磁波吸收较弱。因此本申请将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后进行固化处理,获得第二吸波蜂窝材料;可以看出,通过在所述第一吸波蜂窝材料表面沿蜂窝孔洞表面铺叠吸波预浸料,增强其吸收T向电磁波的性能。本申请将透波预浸料铺叠在所述吸波层表面后进行固化处理,获得T向吸波蜂窝材料。通过上述制备方法获得的T向吸波蜂窝材料相较于现有吸波蜂窝材料,T向对X波段电磁波的吸收强度被大幅提升。
下面结合具体实施例,对本申请所述T向吸波蜂窝材料及其制备方法进行详细说明:
实施例1
将羰基铁吸收剂按80wt%份数加入环氧树脂中,制备成面密度为240g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的玻璃纤维复合成540g/m2的吸波预浸料;
将高度为15mm的白蜂窝置于所述吸收剂浸渍液中进行浸润后,取出在130℃下固化6h,获得第一吸波蜂窝材料;所述吸波预浸料的铺叠厚度为0.8mm;
将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,取出在130℃下固化6h,获得第二吸波蜂窝材料;
将透波预浸料铺叠在吸波预浸料表面进行,取出在130℃下固化6h,获得T向吸波蜂窝材料。
本实施例制备获得的T向吸波蜂窝材料厚度为8mm,其在T向的X波段的吸收强度均值为-16.3dB。
实施例2
将羰基铁吸收剂按85wt%份数加入环氧树脂中,制备成面密度为280g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的玻璃纤维复合成620g/m2的吸波预浸料;
将高度为15mm的白蜂窝置于所述吸收剂浸渍液中进行浸润后,取出在130℃下固化6h,获得第一吸波蜂窝材料;所述吸波预浸料的铺叠厚度为0.6mm;
将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,取出在130℃下固化6h,获得第二吸波蜂窝材料;
将将透波预浸料铺叠在吸波预浸料表面进行,,取出在130℃下固化6h,获得T向吸波蜂窝材料。
本实施例制备获得的T向吸波蜂窝材料厚度为8mm,其在T向的X波段的吸收强度均值为-16.8dB。
实施例3
将羰基铁吸收剂按80wt%份数加入环氧树脂中,制备成面密度为240g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的玻璃纤维复合成540g/m2的吸波预浸料;
将高度为8mm的白蜂窝置于所述吸波剂浸渍液中进行浸润后,取出在130℃下固化6h,获得第一吸波蜂窝材料;所述吸波预浸料的铺叠厚度为1mm;
将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,取出在130℃下固化6h,获得第二吸波蜂窝材料;
将透波预浸料铺叠在吸波预浸料表面进行,取出在130℃下固化6h,获得T向吸波蜂窝材料。
本实施例制备获得的T向吸波蜂窝材料厚度为8mm,其在T向的X波段的吸收强度均值为-13.7dB。
实施例4
将羰基铁吸收剂按80wt%份数加入氰酸酯树脂中,制备成面密度为240g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的石英纤维复合成540g/m2的吸波预浸料;
将高度为15mm的白蜂窝置于所述吸波预浸料中进行浸润后,取出在200℃下固化8h,获得第一吸波蜂窝材料;所述吸波预浸料的铺叠厚度为0.8mm;
将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,取出在200℃下固化8h,获得第二吸波蜂窝材料;
将透波预浸料铺叠在吸波预浸料表面进行,取出在200℃下固化8h,获得T向吸波蜂窝材料。
本实施例制备获得的T向吸波蜂窝材料厚度为8mm,其在T向的X波段的吸收强度均值为-19.5dB。
实施例5
将羰基铁与炭黑按照60:40质量份数互配,将复合吸收剂按照70wt%加入环氧树脂中,制备成面密度为240g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的玻璃纤维复合成540g/m2的吸波预浸料;
将高度为15mm的白蜂窝置于所述吸收剂浸渍液中进行浸润后,取出在130℃下固化6h,获得第一吸波蜂窝材料;所述吸波预浸料的铺叠厚度为0.8mm;
将吸波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,取出在130℃下固化6h,获得第二吸波蜂窝材料;
将透波预浸料铺叠在吸波预浸料表面进行,取出在130℃下固化6h,获得T向吸波蜂窝材料。
本实施例制备获得的T向吸波蜂窝材料厚度为8mm,其在T向的X波段的吸收强度均值为-18.2dB。
对比例1
将羰基铁与炭黑按照60:40质量份数互配,将复合吸收剂按照70wt%加入环氧树脂中,制备成面密度为240g/m2的树脂胶膜,将两层胶膜与面密度为60g/m2的玻璃纤维复合成540g/m2的吸波预浸料;
将高度为15mm的白蜂窝置于所述吸收剂浸渍液中进行浸润后,取出在130℃下固化6h,将透波预浸料沿蜂窝孔洞表面铺叠在第一吸波蜂窝材料表面后,获得对比吸波蜂窝材料;所述对比透波预浸料的铺叠厚度为0.8mm。
本对比例所获得的对比吸波蜂窝材料的厚度为8mm,其在T向的X波段的吸收强度均值为-10.6dB。
可以看出,相较于现有吸波蜂窝材料,本申请通过在沿蜂窝孔洞表面铺叠有吸波层和透波层,从而对蜂窝孔格进行遮挡,进而降低了电磁波从吸波蜂窝材料内部的透射率,从而提升了所述吸波蜂窝材料的吸波性能。采用透波层厚度调节吸波蜂窝的阻抗匹配特性,从而使吸波蜂窝吸收峰落在X波段,从而提升吸波蜂窝吸收性能。以上仅为本申请的优选实施例,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。
Claims (10)
1.一种T向吸波蜂窝材料,其特征在于,所述T向吸波蜂窝材料在蜂窝孔洞表面铺叠有吸波层,固化,再于吸波预浸料表面铺贴透波层,固化得到吸波蜂窝制件。
2.一种如权利要求1所述T向吸波蜂窝材料的制备方法,其特征在于,包括以下步骤:
将白蜂窝置于吸收剂浸渍液中进行浸润后,取出固化,获得第一吸波蜂窝材料;
将吸波预浸料铺叠在所述第一吸波蜂窝材料蜂窝孔洞表面后进行固化处理,获得第二吸波蜂窝材料;将透波预浸料铺叠在所述吸波预浸料表面进行固化处理,获得T向吸波蜂窝制件。
3.根据权利要求2所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸波预浸料在所述第一吸波蜂窝材料的上表面蜂窝孔洞表面进行铺叠,所述吸波预浸料在所述第一吸波蜂窝材料的下表面蜂窝孔洞表面进行铺叠。
4.根据权利要求3所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸波预浸料在所述第一吸波蜂窝材料表面的铺叠厚度为0.5mm~2.5mm。
5.根据权利要求2所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸波预浸料由吸波胶膜和透波纤维复合形成。
6.根据权利要求5所述T向吸波蜂窝材料的制备方法,其特征在于,所述透波纤维包括玻璃纤维、石英纤维、芳纶纤维和聚酰亚胺纤维中至少一种,所述吸波胶膜由吸收剂和树脂组成。
7.根据权利要求5所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸波胶膜的面密度为200g/m2~400g/m2,所述吸波预浸料的面密度为400g/m2~800g/m2。
8.根据权利要求6所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸收剂包括羰基铁和炭黑中的至少一种,所述树脂包括环氧树脂、双马树脂和氰酸酯树脂中的至少一种。
9.根据权利要求8所述T向吸波蜂窝材料的制备方法,其特征在于,所述吸收剂为羰基铁时,所述吸收剂在树脂中的填充量为50wt%~90wt%;所述吸收剂为炭黑时,所述吸收剂在树脂中的填充量为10wt%~40wt%;所述吸收剂为羰基铁和炭黑混合物时,所述吸收剂在树脂中的填充量为30wt%~70wt%。
10.根据权利要求8所述T向吸波蜂窝材料的制备方法,其特征在于,所述树脂为环氧树脂时,所述固化处理的温度为130℃~170℃,时间为3h~8h;所述树脂为双马树脂或氰酸酯树脂时,所述所述固化处理的温度为180℃~230℃,时间为8h。
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