中国塑料 ›› 2024, Vol. 38 ›› Issue (3): 1-6.

• 材料与性能 •    下一篇

电泳烘烤对EP/CF及EP/CF/GF复合材料力学性能的影响

崔晓凤1,方梅2,杜松林1,张娜1,黄明3,高国利4,许经纬5   

  1. 1. 材料成型及模具技术教育部重点实验室,橡塑模具国家工程研究中心,郑州大学
    2. 郑州大学
    3. 郑州大学橡塑模具国家工程研究中心
    4. 深圳市银宝山新科技股份有限公司
    5. 常州达姆斯检测技术有限公司
  • 收稿日期:2023-08-14 修回日期:2023-09-05 出版日期:2024-03-26 发布日期:2024-03-26
  • 基金资助:
    深圳市科技计划资助;河南省重大科技专项

Effect of electrophoretic baking on mechanical properties of EP/CF and EP/CF/GF composites

  • Received:2023-08-14 Revised:2023-09-05 Online:2024-03-26 Published:2024-03-26
  • Supported by:
    Shenzhen Science and Technology Program;Major Science and Technology Project of Henan Province

摘要: 采用真空辅助树脂传递模塑(VARTM)工艺制备了不同铺层方式的碳纤维增强聚合物基复合材料(CFRP):环氧树脂/碳纤维(EP/CF)和环氧树脂/碳纤维/玻璃纤维毡(EP/CF/GF)复合材料,重点研究了不同铺层纤维体系的CFRP渗透率以及电泳烘烤前后的力学性能变化,探究了其失效机理。结果表明,[±45 °]铺层方式有利于体系中树脂的浸润,且加入GF能够明显提高体系的渗透率;电泳烘烤后,CF[0/90 °]、CF[±45 °]和CF/GF[±45 °]的拉伸强度分别下降了15.65 %、12.05 %和6.77 %,模量分别下降了9.08 %、16.39 %和10.04 %,而CF/GF[0/90 °]的拉伸强度和模量则分别提高了7.74 %和6.95 %;在弯曲性能方面,电泳烘烤后CF[0/90 °]、CF/GF[0/90 °]、CF[±45 °]和CF/GF[±45 °]的弯曲强度分别下降了7.62 %、8.23 %、15.89 %和48.39 %,模量分别降低了9.23 %、3.69 %、17.85 %和34.38 %;而电泳烘烤对4种材料的压缩性能影响较小;电泳后,CF[0/90°]和CF[±45 °]的储能模量、损耗模量均有一定幅度提高,CF/GF[0/90 °]和CF/GF[±45 °]的储能模量、损耗模量均有下降。

Abstract: A series of CFRP with different laminating modes was prepared through VARTM, which included the EP/CF and EP/CF/GF composites. Their mechanical properties before and after electrophoretic baking were compared, and their failure mechanism was explored. The results indicated that the [±45 °] laminating method and the addition of GF mat increased the permeability of the composite system significantly. After electrophoretic baking, the tensile strength of the CF[0/90 °], CF[±45 °], and CF/GF[±45 °] composites decreased by 15.65 %, 12.05 %, and 6.77 %, respectively, and their modulus decreased by 9.08 %, 16.39 %, and 10.04 %, respectively. The tensile strength and modulus of the CF/GF[0/90 °] composite increased by 7.74 % and 6.95 %, respectively. According to the flexural performance after electrophoretic baking, the flexural strength of the CF[0/90 °], CF/GF[0/90 °], CF[±45 °], and CF/GF[±45 °] composites decreased by 7.62 %, 8.23 %, 15.89 %, and 48.39 %, respectively, and their modulus decreased by 9.23 %, 3.69 %, 17.85 %, and 34.38 %, respectively. There was little effect of electrophoretic baking on the compression performance of these four composite systems. After electrophoretic baking, the energy storage modulus and loss modulus of the CF[0/90 °] and CF[±45 °] composites increased, whereas the CF/GF[0/90 °] and CF/GF[±45 °] composites showed a decrease in these two moduli.