CN114589979B - 一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及其制备方法 - Google Patents

一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及其制备方法 Download PDF

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CN114589979B
CN114589979B CN202210075312.3A CN202210075312A CN114589979B CN 114589979 B CN114589979 B CN 114589979B CN 202210075312 A CN202210075312 A CN 202210075312A CN 114589979 B CN114589979 B CN 114589979B
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shear thickening
honeycomb
thickening glue
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赵贵哲
黄绍梁
刘亚青
温凯
杜晓梅
段宏基
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North University of China
Shanxi Zhongbei New Material Technology Co Ltd
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Abstract

本发明涉及一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及其制备方法。所述蜂窝夹芯复合材料依次由透波层、吸波层和反射层复合而成;透波层由低介电常数连续纤维布和低介电常数树脂制备而成,能够提供良好的阻抗匹配性能,从而使入射电磁波能够尽可能多的进入到材料内部;中间吸波层为填充有一定高度比的纯剪切增稠胶和吸波功能粒子/剪切增稠胶混合物的蜂窝,能够赋予材料强大的电磁波损耗能力;底层反射层为碳纤维布增强树脂基复合材料,能够使未被吸收的电磁波被反射并被二次损耗。本发明能够解决蜂窝壁涂覆吸波剂工艺存在的不易控制涂层厚度且难以保证均匀性等方面缺陷。

Description

一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及 其制备方法
技术领域
本发明涉及功能蜂窝夹芯复合材料制备技术领域,具体为一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及其制备方法。
背景技术
随着科学技术的不断进步,越来越多的电子设备使用到电磁波,随之而来可能产生电磁干扰和辐射,不仅干扰电子仪器的正常运行,而且还会对处在辐射范围内的生命体造成危害。因此,吸波材料的研究受到了越来越广泛的关注。
吸波材料主要分为涂覆型和结构型两大类。与涂覆型吸波材料相比,结构型吸波材料能够实现承载和吸波双重功效,并且结构可设计性强、性能持久稳定,近年来得到了更广泛的重视和更深入的研究。
蜂窝夹芯复合材料是一种典型的结构型吸波材料,具有质量轻、抗压强度大和刚度高等方面特点,既可作为结构承载的一部分,又可作为吸波材料和吸波介质的载体,被广泛应用于航空航天、汽车、火车、船舶和建筑等领域。目前,关于吸波蜂窝夹芯复合材料吸波性能的试验研究和理论计算已有大量报道,但是,它们涉及的吸波蜂窝夹芯复合材料均是通过将吸波材料涂覆在蜂窝内壁上获得的,虽然也都表现出优异的吸波性能,但蜂窝壁涂覆吸波剂的工艺不易控制涂层厚度且难以保证均匀性,而为获得理想的吸收带宽,蜂窝的厚度仍然很大,同时这种涂覆型的吸波蜂窝夹芯复合材料的抗冲击性能也非常有限。
发明内容
针对上述现有工艺存在的缺陷,本申请提供一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料及其制备方法。
本发明是通过以下技术方案实现的:一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,依次由透波层、吸波层和反射层复合而成;
所述透波层采用低介电常数连续纤维布和低介电常数树脂制备而成;
所述吸波层为填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝,所述纯剪切增稠胶位于靠近透波层的蜂窝孔内,所述吸波功能粒子/剪切增稠胶位于靠近反射层的蜂窝孔内;
所述反射层为碳纤维布增强树脂基复合材料。
作为本发明蜂窝夹芯复合材料技术方案的进一步改进,所述剪切增稠胶为聚硼二甲基硅氧烷剪切增稠胶。
作为本发明蜂窝夹芯复合材料技术方案的进一步改进,所述低介电常数连续纤维布为玻璃纤维布、芳纶纤维布、石英纤维布和超高分子量聚乙烯纤维布中的一种或多种的组合。
作为本发明蜂窝夹芯复合材料技术方案的进一步改进,所述蜂窝为芳纶短切纤维蜂窝、尼龙短碳纤维蜂窝或玻纤短纤维蜂窝中的一种。
作为本发明蜂窝夹芯复合材料技术方案的进一步改进,所述低介电常数树脂为相对介电常数值小于5的任一树脂。
作为本发明蜂窝夹芯复合材料技术方案的进一步改进,所述聚硼二甲基硅氧烷剪切增稠胶的制备工艺为:将硼酸脱水得到焦硼酸,然后配制焦硼酸、二甲基硅氧烷和无水乙醇混合物,一定温度下加热一定时间后,冷却至室温,得到聚合物聚硼二甲基硅氧烷;将聚硼二甲基硅氧烷和过氧化苯甲酰在室温下混合均匀,然后在一定温度下硫化一定时间,冷却至室温,得到所述剪切增稠胶聚硼二甲基硅氧烷。
本发明进一步提供了一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料的制备方法,包括以下步骤:
(1)混合剪切增稠胶和吸波功能粒子,得到吸波功能粒子/剪切增稠胶;
(2)将纯剪切增稠胶或吸波功能粒子/剪切增稠胶放入模具中,压制成所需要的形状和厚度;
(3)将步骤(2)得到的具有所需形状和厚度的纯剪切增稠胶放入模具中,然后放入蜂窝,一定压力下,将纯剪切增稠胶压入蜂窝中,得到填充有一定高度纯剪切增稠胶的蜂窝;
(4)将步骤(2)得到的具有所需形状和厚度的吸波功能粒子/剪切增稠胶放入模具中,然后将步骤(3)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与吸波功能粒子/剪切增稠胶接触,一定压力下,将吸波功能粒子/剪切增稠胶压入蜂窝内,则得到填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶剪切增稠胶填充蜂窝;
(5)制备透波层和反射层:按比例称取并配制树脂胶液;将一定层数的低介电常数连续纤维布或者一定层数的碳纤维布铺放在模具上,每铺一层均需刷涂树脂胶液,达到设计厚度后,通过热压成型工艺制备得到透波层或者反射层;
(6)将步骤(5)得到的透波层和反射层用胶膜分别粘接于步骤(4)得到的填充有剪切增稠胶的蜂窝两侧,其中填充有纯剪切增稠胶的蜂窝一侧与透波层相邻,填充有吸波功能粒子/剪切增稠的蜂窝另一侧与反射层相邻,然后固化成型,则得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
作为本发明制备方法技术方案的进一步改进,所述蜂窝中纯剪切增稠胶和吸波功能粒子/剪切增稠胶的高度比为9:1~1:9。
本发明有益的技术效果在于:
(1)将吸波功能粒子首先分散到剪切增稠胶中,然后再将分散均匀的吸波功能粒子/剪切增稠胶填充至蜂窝中,可以解决蜂窝壁涂覆吸波剂工艺存在的不易控制涂层厚度且难以保证均匀性的缺陷。此外,在具有优异吸波带宽的同时能够降低蜂窝的厚度。
(2)中间吸波层为填充有一定高度比的纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝,从而能够借助介电损耗、磁损耗、1/4波长损耗等,赋予蜂窝夹芯复合材料强大的电磁波损耗能力,尤其是能够覆盖超过10GHz的有效带宽;底层反射层为碳纤维布增强树脂基复合材料,不仅能够使未被吸收的电磁波被反射并被二次损耗,从而进一步提升蜂窝夹芯复合材料的电磁波吸收性能,而且可以进一步提升蜂窝夹芯复合材料的抗冲击性能。
(3)能够通过协同发挥剪切增稠胶和蜂窝的吸能耗能作用,赋予蜂窝夹芯复合材料优异的抗高速冲击性能。一旦受到外力冲击后,剪切增稠胶的分子能在纳米秒内相互锁定,储能模量和强度瞬间提高,并将应力传递向附近的蜂窝单元,使蜂窝夹芯复合材料的受力面积更大,导致塑性变形更大,从而吸收更多的冲击能量。
(4)本发明的原料来源广泛,成型工艺稳定且操作便捷,制得的蜂窝夹芯复合材料的吸波性能和抗冲击性能均优异,在军事和民用领域均具有很好的应用前景。
附图说明
为了更清楚地说明本发明具体实施方式或现有技术中的技术方案,下面将对具体实施方式或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图是本发明的一些实施方式,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为纯剪切增稠胶和吸波功能粒子/剪切增稠胶填充蜂窝示意图。
图2为实施例1-3制备的蜂窝夹芯复合材料。
图3为实施例1-3制备的蜂窝夹芯复合材料的反射率测试曲线图。
图4为对比例1-3制备的蜂窝夹芯复合材料的反射率测试曲线图。
图5为锤头对对比例3的蜂窝夹芯复合材料的冲击破坏示意图。
图6为锤头对实施例1的蜂窝夹芯复合材料的冲击破坏示意图。
由图3和4可知:实施例1-3均具有优于对比例1-3的电磁波吸收性能,表明蜂窝中同时填充纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝夹芯复合材料的吸波隐身性能优于蜂窝中仅仅填充有纯剪切增稠胶或仅仅填充有吸波功能粒子/剪切增稠胶的蜂窝夹芯复合材料的吸波隐身性能。进一步分析实施例1-3可知,蜂窝中填充的纯剪切增稠胶和吸波功能粒子/剪切增稠胶的高度比对制备的蜂窝夹芯复合材料的吸波隐身性能具有显著影响,实施例1出现双峰吸收,RL<-10dB的有效吸收带宽达到10.88GHz(5.63-16.51GHz),最大反射损耗RLmax=-19.63dB;实施例2的最大反射损耗RLmax=-25.59dB;实施例3的有效吸收带宽达到10.47GHz(6.53-17GHz),最大反射损耗RLmax=-13.58dB。
具体实施方式
下面对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明提供了一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,依次由透波层、吸波层和反射层复合而成;
所述透波层采用低介电常数连续纤维布和低介电常数树脂制备而成;
所述吸波层为填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝,所述纯剪切增稠胶位于靠近透波层的蜂窝孔内,所述吸波功能粒子/剪切增稠胶位于靠近反射层的蜂窝孔内;
所述反射层为碳纤维布增强树脂基复合材料。
其中,表面的透波层由低介电常数连续纤维布和低介电常数树脂制备而成,能够提供良好的阻抗匹配性能,从而使入射电磁波能够尽可能多的进入到蜂窝夹芯复合材料的内部,而不是在表面被反射;中间吸波层为填充有一定高度比的纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝,借助介电损耗、磁损耗、1/4波长损耗等,赋予蜂窝夹芯复合材料强大的电磁波损耗能力;底层反射层为碳纤维布增强树脂基复合材料,能够使未被吸收的电磁波被反射并被二次损耗,从而进一步提升蜂窝夹芯复合材料的电磁波吸收性能;所述透波层、吸波层和反射层通过胶膜粘接并固化成型。
在本发明中,所述剪切增稠胶为聚硼二甲基硅氧烷剪切增稠胶。
所述吸波功能粒子为任何一维的尺度均小于所使用蜂窝直径的所有具有损耗电磁波功能的粒子。
本发明进一步提供了所述聚硼二甲基硅氧烷剪切增稠胶的制备工艺,包括以下步骤:将硼酸脱水得到焦硼酸,然后配制焦硼酸、二甲基硅氧烷和无水乙醇混合物,一定温度下加热一定时间后,冷却至室温,得到聚合物聚硼二甲基硅氧烷;将聚硼二甲基硅氧烷和过氧化苯甲酰在室温下混合均匀,然后在一定温度下硫化一定时间,冷却至室温,得到所述剪切增稠胶聚硼二甲基硅氧烷。
在上述工艺中,优选的,所述焦硼酸、二甲基硅氧烷和无水乙醇的质量比为15:81:4~8:90:2。焦硼酸、二甲基硅氧烷和无水乙醇混合物的加热温度为150-350℃,加热时间为3-12h;所述聚硼二甲基硅氧烷和过氧化苯甲酰的硫化温度为70-230℃,硫化时间为1-3h。
在本发明中,所述低介电常数连续纤维布为玻璃纤维布、芳纶纤维布、石英纤维布和超高分子量聚乙烯纤维布中的一种或多种的组合。
优选的,所述蜂窝为芳纶短切纤维蜂窝、尼龙短碳纤维蜂窝或玻纤短纤维蜂窝中的一种。
优选的,所述低介电常数树脂为相对介电常数值小于5的任一树脂。
本发明进一步提供了一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料的制备方法,包括以下步骤:
(1)混合剪切增稠胶和吸波功能粒子,得到吸波功能粒子/剪切增稠胶;
(2)将纯剪切增稠胶或吸波功能粒子/剪切增稠胶分别放入模具中,压制成所需要的形状和厚度;
(3)将步骤(2)得到的具有所需形状和厚度的纯剪切增稠胶放入模具中,然后放入蜂窝,一定压力下,将纯剪切增稠胶压入蜂窝中,得到填充有一定高度纯剪切增稠胶的蜂窝;
(4)将步骤(2)得到的具有所需形状和厚度的吸波功能粒子/剪切增稠胶放入模具中,然后将步骤(3)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与吸波功能粒子/剪切增稠胶接触,一定压力下,将吸波功能粒子/剪切增稠胶压入蜂窝内,则得到填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶剪切增稠胶填充蜂窝;
(5)制备透波层和反射层:按比例称取并配制树脂胶液;将一定层数的低介电常数连续纤维布或者一定层数的碳纤维布铺放在模具上,每铺一层均需刷涂树脂胶液,达到设计厚度后,通过热压成型工艺制备得到透波层和反射层;
(6)将步骤(5)得到的透波层和反射层用胶膜分别粘接于步骤(4)得到的填充有剪切增稠胶的蜂窝两侧,其中填充有纯剪切增稠胶的蜂窝一侧与透波层相邻,填充有吸波功能粒子/剪切增稠的蜂窝另一侧与反射层相邻,然后固化成型,则得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
上述制备方法中,在步骤(1)中,所述剪切增稠胶和吸波功能粒子的质量比为8:2-2:8。
在步骤(5)中,所述透波层和吸波层所使用的树脂胶液完全相同,均为低介电常数树脂。其中热压成型工艺中,热压压力为5-20MPa,热压温度为100-150℃,热压时间为0.5-3h。
在步骤(6)中,所述固化成型工艺的固化压力为0.1-1MPa,固化温度为100-200℃,固化时间为0.5-3h。
下面通过具体实施例来对本发明的技术方案进行详细的说明。
各实施例和对比例的准备,包括以下步骤:
(1)纯剪切增稠胶的制备:
将硼酸在140℃脱水6h,得到焦硼酸;按照20:75:5的质量比混合焦硼酸、二甲基硅油和无水乙醇,180℃加热4h,冷却至室温,得到聚合物基体。按照35:1的质量比将制备的聚合物基体和过氧化苯甲酰在室温下通过双辊开炼机混合,然后将样品在120℃硫化0.5h,冷却至室温,得到纯剪切增稠胶。
(2)片状羰基铁/剪切增稠胶的制备
按照4:6的质量比将纯剪切增稠胶和片状羰基铁在室温下混合,得到片状羰基铁/剪切增稠胶。
(3)树脂胶液的配制:按照1:0.8的质量比混合环氧树脂E51和固化剂六氢苯酐,然后真空除泡,得到树脂胶液。
(4)透波层的制备:将2层裁剪后的石英纤维布刷涂步骤(3)配制的树脂胶液,得到预浸料;在模具上涂刷脱模剂,将得到的预浸料铺放在模具上,然后通过热压成型工艺制备得到透波层;热压工艺参数为:100℃60min和140℃120min,施加15atm的压力。
(5)反射层的制备:裁剪5层碳纤维布,每层均均匀刷涂步骤(3)制备的树脂胶液,得到预浸料;在模具上涂刷脱模剂,将预浸料铺放在模具上,然后通过热压成型工艺制备得到反射层;热压工艺参数为:100℃凝胶60min,然后140℃下固化120min,施加15atm的压力。
实施例1:
(6)称取纯剪切增稠胶并放入到模具中,1MPa的压力下压制成180×180mm的正方形,然后将180×180×5mm蜂窝放入模具中,在1MPa的压力,将纯剪切增稠胶压入蜂窝内,使蜂窝中纯剪切增稠胶的厚度为3.5mm。
(7)称取片状羰基铁/剪切增稠胶并放入到模具中,在1MPa压力下压制成180×180mm的正方形,然后将步骤(6)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与片状羰基铁/剪切增稠胶片接触,在1MPa的压力,将片状羰基铁/剪切增稠胶压入蜂窝内,使蜂窝中片状羰基铁/剪切增稠胶的厚度为1.5mm,得到吸波层。
(8)将透波层、吸波层、反射层、环氧树脂胶膜按照图2的顺序铺层,然后在130℃、1MPa的压力下固化1h,得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
实施例2:
(6)称取纯剪切增稠胶并放入到模具中,1MPa的压力下压制成180×180mm的正方形,然后将180×180×5mm蜂窝放入模具中,在1MPa的压力,将纯剪切增稠胶压入蜂窝内,使蜂窝中纯剪切增稠胶的厚度为2mm。
(7)称取片状羰基铁/剪切增稠胶并放入到模具中,在1MPa压力下压制成180×180mm的正方形,然后将步骤(6)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与片状羰基铁/剪切增稠胶片接触,在1MPa的压力,将片状羰基铁/剪切增稠胶压入蜂窝内,使蜂窝中片状羰基铁/剪切增稠胶的厚度为3mm,得到吸波层。
(8)将透波层、吸波层、反射层、环氧树脂胶膜按照图2的顺序铺层,然后在130℃、1MPa的压力下固化1h,得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
实施例3:
(6)称取纯剪切增稠胶并放入到模具中,1MPa的压力下压制成180×180mm的正方形,然后将180×180×5mm蜂窝放入模具中,在1MPa的压力,将纯剪切增稠胶压入蜂窝内,使蜂窝中纯剪切增稠胶的厚度为4mm。
(7)称取片状羰基铁/剪切增稠胶并放入到模具中,在1MPa压力下压制成180×180mm的正方形,然后将步骤(6)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与片状羰基铁/剪切增稠胶片接触,在1MPa的压力,将片状羰基铁/剪切增稠胶压入蜂窝内,使蜂窝中片状羰基铁/剪切增稠胶的厚度为1mm,得到吸波层。
(8)将透波层、吸波层、反射层、环氧树脂胶膜按照图2的顺序铺层,然后在130℃、1MPa的压力下固化1h,得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
采用弓形法测试实施例1-3制备的蜂窝夹芯复合材料的反射率,所得曲线如图3所示。
对比例1:
(6)称取纯剪切增稠胶并放入到模具中,1MPa的压力下压制成180×180mm的正方形,然后将180×180×5mm蜂窝放入模具中,在1MPa的压力,将纯剪切增稠胶压入蜂窝内,使蜂窝中纯剪切增稠胶的厚度为5mm。
(7)将透波层、反射层、环氧树脂胶膜、步骤(6)得到的纯剪切增稠胶填充蜂窝按照图2的顺序铺层,然后在130℃、1MPa的压力下固化1h,得到蜂窝夹芯复合材料。
采用弓形法测试本对比例制备的蜂窝夹芯复合材料的反射率,所得曲线如图4所示,RL均大于-10dB,最大反射损耗RLmax=-2.81dB。
对比例2:
(6)称取片状羰基铁/剪切增稠胶并放入到模具中,1MPa的压力下压制成180×180mm的正方形,然后将180×180×5mm蜂窝放入模具中,在1MPa的压力,将片状羰基铁/剪切增稠胶压入蜂窝内,使蜂窝中片状羰基铁/剪切增稠胶的厚度为5mm。
(7)将透波层、反射层、环氧树脂胶膜、步骤(6)得到的剪切增稠胶填充的蜂窝结构按照图2的铺层顺序进行铺层,然后在130℃、1MPa的压力下固化1h,得到填充片状羰基铁/剪切增稠胶的蜂窝夹芯复合材料。
采用弓形法测试本对比例制备的蜂窝夹芯复合材料的反射率,所得曲线如图5所示,RL<-10dB的有效吸收带宽为0.9GHz(2.14-3.04GHz),最大反射损耗RLmax=-17.35dB。
对比例3:
(6)将透波层、反射层、环氧树脂胶膜、原始蜂窝按照图2的顺序铺层,然后在130℃、1MPa的压力下固化1h,得到原始蜂窝夹芯复合材料。
采用弓形法测试本实施例制备的复合材料的反射率,所得曲线如图6所示,RL均大于-10dB,最大反射损耗RLmax=-1.07dB。
对实施例1-3和对比例1-3的样品按照GJB 2038A–2011《雷达吸波材料反射率测试方法》进行弓形法吸波性能测试,结果如表1所示;按照ASTM D 7766《Standard Practicefor Damage Resistance Testing of Sandwich Constructions》进行冲击实验测试,测试条件为:冲击能量为锤头质量为10.25kg,冲头半径为10mm,冲击能量为150J,测试结果如表2所示。
表1
表2
冲击实验测试 最大荷载(kN) 吸收能量(J)
实施例1 3.19 33.38
对比例1 3.16 30.83
对比例2 3.59 35.59
对比例3 2.72 26.32
由表1和表2可知:借助介电损耗、磁损耗、1/4波长损耗等,本发明的蜂窝夹芯复合材料具有优异的吸波隐身功能。此外,由图5可知,对于蜂窝内未填充增稠胶的对比例3制备的蜂窝夹芯复合材料,锤头对蜂窝单元破坏有限,从背部看塑性变形较小。由图6可知,对于蜂窝中填充了纯剪切增稠胶和吸波功能粒子/剪切增稠胶的实施例1制备的蜂窝夹芯复合材料,受外力作用后,由于剪切增稠胶的分子能够在纳米秒内相互锁定,使储能模量和强度瞬间提高,并能够将应力传递向附近的蜂窝单元,使蜂窝夹芯复合材料的受力面积增大,导致塑性变形更大,从而可以吸收更多的冲击能量,因此实施例1吸收的能量大幅提升,比对比例3提高了26.8%。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (8)

1.一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,依次由透波层、吸波层和反射层复合而成;
所述透波层采用低介电常数连续纤维布和低介电常数树脂制备而成;
所述吸波层为填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶的蜂窝,所述纯剪切增稠胶位于靠近透波层的蜂窝孔内,所述吸波功能粒子/剪切增稠胶位于靠近反射层的蜂窝孔内;
所述反射层为碳纤维布增强树脂基复合材料;
所述中间吸波层能够赋予蜂窝夹芯复合材料抗高速冲击性能,同时借助介电损耗、磁损耗、1/4波长损耗,赋予蜂窝夹芯复合材料电磁波损耗能力。
2.根据权利要求1所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,所述剪切增稠胶为聚硼二甲基硅氧烷剪切增稠胶。
3.根据权利要求1所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,所述低介电常数连续纤维布为玻璃纤维布、芳纶纤维布、石英纤维布和超高分子量聚乙烯纤维布中的一种或多种的组合。
4.根据权利要求1所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,所述蜂窝为芳纶短切纤维蜂窝、尼龙短碳纤维蜂窝或玻纤短纤维蜂窝中的一种。
5.根据权利要求1所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,所述低介电常数树脂为相对介电常数值小于5的任一树脂。
6.根据权利要求2所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料,其特征在于,所述聚硼二甲基硅氧烷剪切增稠胶的制备工艺为:将硼酸脱水得到焦硼酸,然后配制焦硼酸、二甲基硅氧烷和无水乙醇混合物,一定温度下加热一定时间后,冷却至室温,得到聚合物聚硼二甲基硅氧烷;将聚硼二甲基硅氧烷和过氧化苯甲酰在室温下混合均匀,然后在一定温度下硫化一定时间,冷却至室温,得到所述剪切增稠胶聚硼二甲基硅氧烷。
7.如权利要求1至6任一权利要求所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料的制备方法,其特征在于,包括以下步骤:
(1)混合剪切增稠胶和吸波功能粒子,得到吸波功能粒子/剪切增稠胶;
(2)将纯剪切增稠胶或吸波功能粒子/剪切增稠胶放入模具中,压制成所需要的形状和厚度;
(3)将步骤(2)得到的具有所需形状和厚度的纯剪切增稠胶放入模具中,然后放入蜂窝,一定压力下,将纯剪切增稠胶压入蜂窝中,得到填充有一定高度纯剪切增稠胶的蜂窝;
(4)将步骤(2)得到的具有所需要形状和厚度的吸波功能粒子/剪切增稠胶放入模具中,然后将步骤(3)得到的一面已压入纯剪切增稠胶的蜂窝放入模具中并使未压入剪切增稠胶的一面与吸波功能粒子/剪切增稠胶接触,一定压力下,将吸波功能粒子/剪切增稠胶压入蜂窝内,则得到填充有纯剪切增稠胶和吸波功能粒子/剪切增稠胶剪切增稠胶填充蜂窝;
(5)制备透波层和反射层:按比例称取并配制树脂胶液;将一定层数的低介电常数连续纤维布或者一定层数的碳纤维布铺放在模具上,每铺一层均需刷涂树脂胶液,达到设计厚度后,通过热压成型工艺制备得到透波层或反射层;
(6)将步骤(5)得到的透波层和反射层用胶膜分别粘接于步骤(4)得到的填充有剪切增稠胶的蜂窝两侧,其中填充有纯剪切增稠胶的蜂窝一侧与透波层相邻,填充有吸波功能粒子/剪切增稠的蜂窝另一侧与反射层相邻,然后固化成型,则得到本发明的兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料。
8.根据权利要求7所述的一种兼具抗高速冲击和吸波隐身功能的蜂窝夹芯复合材料的制备方法,其特征在于,所述蜂窝中纯剪切增稠胶和吸波功能粒子/剪切增稠胶的高度比为9:1~1:9。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104476828A (zh) * 2014-11-28 2015-04-01 中国科学院力学研究所 夹芯吸能装置
CN108749229A (zh) * 2018-04-23 2018-11-06 西北工业大学 一种三明治结构吸波复合材料及制备方法
CN110091562A (zh) * 2019-05-07 2019-08-06 江南大学 一种基于剪切增稠胶的抗冲击柔性防护复合材料及其制备方法
CN112776372A (zh) * 2021-01-15 2021-05-11 中北大学 一种结构功能一体化连续纤维树脂基吸波隐身复合材料及其制备方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018075108A1 (en) * 2016-07-15 2018-04-26 VICIS, Inc. Impacting absorbing structures in body protective equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104476828A (zh) * 2014-11-28 2015-04-01 中国科学院力学研究所 夹芯吸能装置
CN108749229A (zh) * 2018-04-23 2018-11-06 西北工业大学 一种三明治结构吸波复合材料及制备方法
CN110091562A (zh) * 2019-05-07 2019-08-06 江南大学 一种基于剪切增稠胶的抗冲击柔性防护复合材料及其制备方法
CN112776372A (zh) * 2021-01-15 2021-05-11 中北大学 一种结构功能一体化连续纤维树脂基吸波隐身复合材料及其制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
羰基铁-聚苯胺复合吸波材料的制备及性能;景红霞;李巧玲;叶云;杨晓峰;;功能高分子学报(04);全文 *

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