CN111995783A - 一种含网格加强筋结构的预浸料及制备方法 - Google Patents
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Abstract
本发明提供了一种含网格加强筋结构的预浸料及制备方法,解决目前常用复合材料预浸料结构形式单一、设计裕度小、承载低的不足。主要实施方案是将连续植物纤维网格加强筋覆合在预浸料单侧形成含加强型预浸料,网格型加强筋为植物纤维网格,主要由黄麻、苎麻、大麻或亚麻加捻纱线制备,纱线直径为3‑8mm;加强型网格为正方形、菱形、三角形等,网格尺寸为3‑10cm。利用植物纤维加强网格质量轻、高比模量、高阻尼的特性,将两种不同结构的织物结合形成了复合结构的预浸料,适用于抗变形的薄壁壳层结构。
Description
技术领域
本发明属于复合材料预浸料制备及应用领域,提供了一种含网格加强筋结构的预浸料及制备方法,可用于薄壁壳层结构的加工制造。
背景技术
先进树脂基复合材料(以下简称复合材料)具有比强度高、比模量高、可设计性强及综合性能优异等一系列特点,是轻质高效结构设计最理想的材料,在航空、航天、兵器、舰船、能源、建筑和体育用品等领域得到了极大的应用。据统计2018年世界复合材料用量已达到了1100万吨,而且预计在未来几年国内外对复合材料需求量仍以每年约4~5%速度持续递增,市场潜力巨大。预浸料是复合材料制件加工中关键的中间材料,由纤维增强织物浸渍基体树脂形成,可用于热压罐、模压、真空袋成型,制件加工工艺易实施,制件强度高,尺寸精度容易控制。常见预浸料增强织物有碳纤维织物、玻璃纤维织物、芳纶纤维织物、玄武岩纤维织物等,基体树脂有环氧树脂、乙烯基树脂、氰酸酯树脂、酚醛树脂、双马来酰亚胺树脂、聚酰亚胺树脂等。目前预浸料都是采用单一的层内结构或不同的织物形式,如平纹、斜纹、缎纹,还未有多种结构复合模式,所以结构模式单一,承载或形变受单一因素影响,可设计性受限。
网格是一种与平板网架类似的空间杆系结构,系以杆件为基础,按一定规律组成网格,按壳体结构布置的空间构架,它兼具杆系和壳体的性质。其传力特点主要是通过壳内两个方向的拉力、压力或剪力逐点传力。此结构由于承力特点广泛应用在建筑物等空间结构中。平面网格结构是空间杆系结构的特殊形式,不同结构形式的网格具有不同的承力特点,可根据实际受力形式对网格结构进行设计,在不增加构件重量的同时有效提高其载荷。
发明内容
本发明的发明目的是提供一种含网格加强筋结构的预浸料及制备方法,解决目前常用复合材料预浸料结构形式单一、设计裕度小、承载低的不足。
为了解决上述技术问题,本发明采用的技术方案是:
一种含网格加强筋结构的预浸料及制备方法,将连续的植物纤维网格加强筋覆合在预浸料单侧,形成含网格加强筋结构的预浸料。
所述含网格加强筋结构的预浸料由黄麻或苎麻或大麻或亚麻加捻纱线制备。纱线直径为3-8mm。所述植物纤维网格为正方形或菱形或三角形的网格,网格尺寸为3-10cm。含网格加强筋结构的预浸料为碳纤维或玻璃纤维或植物纤维预浸料,其织物类型为平纹或斜纹或缎纹,基体树脂是环氧树脂、乙烯基树脂、氰酸酯树脂、酚醛树脂、双马来酰亚胺树脂、聚酰亚胺树脂中的任何一种。
所述预浸料用于热压罐或真空袋或模压成型或与纤维织物叠层后真空灌注成型。所述预浸料用于薄壁抗形变壳层结构的加工制造。
所述的含网格加强筋结构的预浸料的制备过程为,将植物纤维加强网格覆合在预浸料一侧,主要步骤如下:
(1)用湿法预浸工艺将植物纤维增强网格浸渍树脂;
(2)将浸渍有树脂的植物纤维加强网格直接覆合在预浸料一侧。
所述的含网格加强筋结构的预浸料的制备过程为,将植物纤维加强网格覆合在预浸料一侧,通过下述方法制备:
(1)将植物纤维加强网格覆合在纤维织物表面,用经向或纬向纱线固定;
(2)将固定有网格加强结构的织物直接当面或双面预浸树脂,或者采用湿法浸渍树脂。
附图说明
下面结合附图对本发明的具体实施方式作进一步详细说明。
图1为方格结构植物纤维加强网格示意图;
图2为三角形结构植物纤维加强网格示意图;
图3为菱形结构植物纤维加强网格示意图;
图4为S型结构植物纤维加强网格示意图;
图5为蜂窝结构植物纤维加强网格示意图;
图6为含植物纤维加强网格的层合板。
具体实施方式
下面结合具体实施例对本发明进行进一步描述,但是本领域技术人员将会理解,下列实施例仅用于说明本发明,而不应视为限制本发明的范围。实施例中未注明具体条件者,按照常规提交或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者,均为可以通过市售购买获得的常规产品。
本发明中所述的一种含网格加强筋结构的预浸料及制备方法,其特征在于将植物纤维加强网格覆合在预浸料一侧。主要实施例如下:
(1)采用面密度为200g的黄麻纤维平纹织物,将直径约为5mm的纱线制成的空格边长约为50mm方格用纬向的纱线缝合在黄麻纤维平纹织物一侧;
(2)采用湿法浸渍工艺预浸树脂,浸渍液为环氧树脂的丙酮溶液,质量浓度60%。浸渍后含网格加强筋结构预浸料的树脂含量约为45%;
(3)溶剂挥发后采用模压成型制备层合板内部含有加强筋结构的壳层,如图6所示。该壳层结构与不含加强筋结构壳层相比,其承载能力增加约20-40%。
本发明提出一种含网格加强筋结构的预浸料及制备方法,将连续植物纤维网格加强筋覆合在预浸料单侧形成含加强型预浸料,实现了将两种不同结构的织物结合成一体形成了复合结构的预浸料,可根据实际应用工况在普通预浸料中设计加强结构以达到应用目的。发明申请中尤其选用了植物纤维加强网格是基于植物纤维织物质量轻、高比模量、高阻尼的特性,特别适用于抗变形的薄壁壳层结构的加工制造。含有植物纤维加强网格结构的预浸料可用于赛车运动车身部件或汽车内饰,结合植物纤维高性能(刚度,减振)和低重量,可提高制件更安全的碰撞性能。
除此之外,剑麻纤维、黄麻纤维、亚麻纤维等天然纤维能够有效增强复合材料,且从麻类植物的分布来看,我国的麻资源十分丰富,如何有效提高其应用效率和附加值,不仅对绿色复合材料有巨大的推动作用,对我国麻纺织行业乃至整个纺织行业的技术进步、结构调整、效益增加都将有很大的推动作用。
Claims (9)
1.一种含网格加强筋结构的预浸料,其特征在于,将连续的植物纤维网格加强筋覆合在预浸料单侧,形成含网格加强筋结构的预浸料。
2.根据权利要求1所述的含网格加强筋结构的预浸料,其特征在于,所述含网格加强筋结构的预浸料由黄麻或苎麻或大麻或亚麻加捻纱线制备。
3.根据权利要求2所述的含网格加强筋结构的预浸料,其特征在于,纱线直径为3-8mm。
4.根据权利要求1所述含网格加强筋结构的预浸料,其特征在于,所述植物纤维网格为正方形或菱形或三角形的网格,网格尺寸为3-10cm。
5.根据权利要求1所述的网格加强筋结构的预浸料,其特征在于,含网格加强筋结构的预浸料为碳纤维或玻璃纤维或植物纤维预浸料,其织物类型为平纹或斜纹或缎纹,基体树脂是环氧树脂、乙烯基树脂、氰酸酯树脂、酚醛树脂、双马来酰亚胺树脂、聚酰亚胺树脂中的任何一种。
6.根据权利要求1所述的含网格加强筋结构的预浸料,其特征在于,所述预浸料用于热压罐或真空袋或模压成型或与纤维织物叠层后真空灌注成型。
7.根据权利要求1所述的含网格加强筋结构的预浸料,其特征在于,所述预浸料用于薄壁抗形变壳层结构的加工制造。
8.一种含网格加强筋结构的预浸料的制备方法,其特征在于,如权利要求5所述的含网格加强筋结构的预浸料的制备过程为,将植物纤维加强网格覆合在预浸料一侧,主要步骤如下:
(1)用湿法预浸工艺将植物纤维增强网格浸渍树脂;
(2)将浸渍有树脂的植物纤维加强网格直接覆合在预浸料一侧。
9.一种含网格加强筋结构的预浸料的制备方法,其特征在于,如权利要求5所述的含网格加强筋结构的预浸料的制备过程为,将植物纤维加强网格覆合在预浸料一侧,通过下述方法制备:
(1)将植物纤维加强网格覆合在纤维织物表面,用经向或纬向纱线固定;
(2)将固定有网格加强结构的织物直接当面或双面预浸树脂,或者采用湿法浸渍树脂。
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Citations (9)
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US20080160860A1 (en) * | 2004-03-02 | 2008-07-03 | Toray Industries, Inc. | Epoxy Resin Composition for Fiber-Reinforced Composite Material, Prepreg, and Fiber-Reinforced Composite Material |
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