CN111040386A - 一种碳纤维预浸树脂及其制备方法 - Google Patents
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Abstract
本发明公开了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:环氧树脂20‑60份、固化剂1‑20份、增韧剂5‑50份、促进剂1‑20份、导电剂10‑50份、其他添加剂1‑10份,其中,其他添加剂包括炭黑、染料、荧光剂、填充剂、触变剂及导热填料中的至少一种。该预浸树脂通过在环氧树脂中添加不同功能的添加剂,赋予了预浸树脂高拉伸、高回弹、高导电等特性,解决了现有技术中预浸树脂脆性大、拉伸率低、单向预浸料某一方向导电导热差、多层预浸料层间导电导热差的问题。
Description
技术领域
本发明涉及一种预浸料,具体涉及一种碳纤维预浸树脂及其制备方法。
背景技术
碳纤维是一种具有很高强度和模量的耐高温纤维,为化纤的高端品种。它是同时具有碳素材料的结构特性和纤维材料特征的高性能纤维,碳纤维复合材料由于其优良的物理性能在航空航天、建筑、汽车工业等领域得到了广泛的使用和发展。
预浸料制备是获得碳纤维复合材料的常用方法,其中,碳纤维环氧树脂预浸料是制备碳纤维环氧树脂复合材料的中间产物。它的力学性能将直接影响碳纤维环氧树脂复合材料的力学性能。我们所接触的常规碳纤维预浸料多用于民用领域,如体育用品、汽车制造、装饰装修等领域。随着近些年碳纤维逐步在电子领域有了应用,因此对碳纤维产品有了更多、更高、更特殊的要求。
传统碳纤维预浸料多采用环氧树脂胶作为预浸树脂,功能单一,不能满足现代电子行业对高导电、高导磁、高拉伸、高回弹的新性能需求。
发明内容
本发明的目的是克服现有技术的不足,提供一种碳纤维预浸树脂,该预浸树脂具有高导电、高导热、高拉伸、高回弹的特性。
为达到上述目的,本发明采用的技术方案是:一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:环氧树脂20-60份、固化剂1-20份、增韧剂5-50份、促进剂1-20份、导电剂10-50份、其他添加剂1-10份,其中,其他添加剂包括炭黑、染料、荧光剂、填充剂、触变剂及导热填料中的至少一种。
优选地,所述环氧树脂为双酚A型环氧树脂、双酚F型环氧树脂、酚醛环氧树脂、邻甲酚型环氧树脂、橡胶改性环氧树脂、聚氨酯改性环氧树脂中的一种或多种的混合。
优选地,所述的固化剂为芳香胺固化剂、聚醚胺固化剂、咪唑类固化剂、酸酐类固化剂中的一种或多种的混合。
优选地,所述增韧剂选自橡胶类增韧剂、丙烯酸弹性体、聚氨酯弹性体、核壳增韧剂中的至少一种。
优选地,所述导电剂选自微米银粉、石墨烯、石墨及其他金属粉中的至少一种。
优选地,所述促进剂选用了官能度为3至4的聚硫醇促进剂。
作为一种具体的实施方式,所述碳纤维预浸树脂的原料中,各组分的质量份数为:环氧树脂50-60份、固化剂10-20份、增韧剂5-10份、促进剂5-20份、导电剂30-50份、其他添加剂1-10份。
本发明的另一个目的是提供一种上述碳纤维预浸树脂的制备方法,具体步骤如下:
1)按质量份数计称取原料,将环氧树脂、增韧剂、导电剂及其他添加剂混合搅拌均匀;
2)使用三辊研磨机,按照10-30um的间隙对步骤1)中的混合料进行研磨,研磨后,目视无颗粒感即可;
3)将固化剂、促进剂添加至步骤2)研磨后的混合料中,进行再次混合搅拌,至混合均匀,混合温度控制在23℃-30℃间。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:本发明的碳纤维预浸树脂,其以环氧树脂为主料,加入导电粉末,赋予树脂导电、导热、电磁屏蔽的效果;通过加入聚硫醇促进剂,赋予树脂低温快速固化的特性,而加入填充剂、炭黑、染料、荧光剂等其他添加剂,赋予预浸树脂及碳纤维预浸料不同的外观色泽,该配方制得的预浸树脂具有高拉伸、高回弹、高导电等特性,解决了现有技术中预浸树脂脆性大、拉伸率低、单向预浸料某一方向导电导热性差、多层预浸料层间导电导热差的问题。
具体实施方式
下面结合具体实施例来对本发明的技术方案作进一步的阐述。
以下实施例中的碳纤维预浸树脂均是按照以下步骤制得:
1)按质量份数计称取原料,将环氧树脂、增韧剂、导电剂及其他添加剂混合搅拌均匀;
2)使用三辊研磨机,按照10-30um的间隙对步骤1)中的混合料进行研磨,研磨后,目视无颗粒感即可;
3)将固化剂、促进剂添加至步骤2)研磨后的混合料中,进行再次混合搅拌,至混合均匀,混合温度控制在23-30℃。
实施例1
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:双酚A型环氧树脂40份、聚醚胺固化剂20份、丙烯酸弹性体5份、硫醇促进剂1份、纳米银粉50份、炭黑1份。
实施例2
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:双酚F型环氧树脂30份、芳香胺固化剂10份、丙烯酸弹性体10份、官能度为3的聚硫醇促进剂5份、石墨烯40份、染料2份、导热填料5份。
实施例3
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:酚醛环氧树脂20份、聚氨酯改性环氧树脂30份、咪唑类固化剂5份、聚氨酯弹性体20份、官能度为4的聚硫醇促进剂10份、金粉30份、炭黑2份、荧光剂2份。
实施例4
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:橡胶改性环氧树脂60份、酸酐类固化剂1份、聚氨酯弹性体10份、核壳增韧剂20份、官能度为3的聚硫醇促进剂3份、铜粉20份、炭黑5份、触变剂5份。
实施例5
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:邻甲酚型环氧树脂10份、双酚F型环氧树脂10份、聚醚胺固化剂8份、橡胶类增韧剂40份、官能度为3的聚硫醇促进剂12份、纳米银粉10份、炭黑10份。
对比例1
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:双酚A型环氧树脂40份、芳香胺固化剂20份、丁腈橡胶15份、促进剂1份。
对比例2
本例中提供了一种碳纤维预浸树脂,按照质量份数计,包含以下组分的原料:酚醛环氧树脂5份、芳香胺固化剂20份、丁腈橡胶20份、促进剂1份。
对采用上述制备方法结合实施例1至5及对比例中的配方所制得的碳纤维预浸树脂进行性能测试,测试结果见表1。
测试标准:
(二)电阻率:四探针电阻测试仪
(一)断裂伸长率:万能材料试验机
(三)电磁屏蔽:安捷伦E5071C(100M-8.5G Hz)
表1
从表1中我们可以看出,通过在环氧树脂中添加导电剂,使得预浸树脂体积电阻率大大降低,从而赋予了预浸树脂具有良好的导电性能;增韧剂及聚硫醇促进剂量的增加,能够使预浸树脂具有良好的断裂伸长率,特别是采用实施例4的配方,其性能最为优异。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。
Claims (8)
1.一种碳纤维预浸树脂,其特征在于,按照质量份数计,包含以下组分的原料:环氧树脂20-60份、固化剂1-20份、增韧剂5-50份、促进剂1-20份、导电剂10-50份、其他添加剂1-10份,其中,其他添加剂包括炭黑、染料、荧光剂、填充剂、触变剂及导热填料中的至少一种。
2.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述环氧树脂为双酚A型环氧树脂、双酚F型环氧树脂、酚醛环氧树脂、邻甲酚型环氧树脂、橡胶改性环氧树脂、聚氨酯改性环氧树脂中的一种或多种的混合。
3.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述的固化剂为芳香胺固化剂、聚醚胺固化剂、咪唑类固化剂、酸酐类固化剂中的一种或多种的混合。
4.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述增韧剂选自橡胶类增韧剂、丙烯酸弹性体、聚氨酯弹性体、核壳增韧剂中的至少一种。
5.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述导电剂选自微米银粉、石墨烯、石墨及其他金属粉中的至少一种。
6.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述促进剂选用了官能度为3至4的聚硫醇促进剂。
7.根据权利要求1所述的碳纤维预浸树脂,其特征在于,所述碳纤维预浸树脂的原料中,各组分的质量份数为:环氧树脂50-60份、固化剂10-20份、增韧剂5-10份、促进剂5-20份、导电剂30-50份、其他添加剂1-10份。
8.一种如权利要求1至7中任一所述的碳纤维预浸树脂的制备方法,其特征在于,具体步骤如下:
1)按质量份数计称取原料,将环氧树脂、增韧剂、导电剂及其他添加剂混合搅拌均匀;
2)使用三辊研磨机,按照10-30um的间隙对步骤1)中的混合料进行研磨,研磨后,目视无颗粒感即可;
3)将固化剂、促进剂添加至步骤2)研磨后的混合料中,进行再次混合搅拌,至混合均匀,混合温度控制在23℃-30℃间。
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