文章信息/Info

Title:

Preparation of CNF/CNT/Carbon Fiber Reinforcement by Vacuum Filtration and Its Interfacial Properties of Composites

文章編號:

1674-3962(2022)06-0423-06

作者:

白換換1; 武清1; 葉紫怡1; 徐小建2; 鄧昊1; 朱建鋒1

（1. 陜西科技大學材料科學與工程學院 陜西省無機材料綠色制備與功能化重點實驗室，陜西 西安 710021）（2. 中國石油天然氣股份有限公司 長慶油田分公司第三采氣廠，陜西 西安 710299）

Author(s):

BAI Huanhuan1;  WU Qing1;  YE Ziyi1;  XU Xiaojian2;  DENG Hao1;  ZHU Jianfeng1

（1. Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China）（2. The Third Gas Production Plant of Changqing Oilfield Company, China National Petroleum Corporation, Xi’an 710299, China）

關鍵詞:

碳纖維; 樹脂基復合材料; 界面; 表面改性; 真空抽濾法

Keywords:

carbon fiber; polymer-matrix composites; interphase; surface treatments; vacuum filtration

分類號:

TB332

DOI:

10.7502/j.issn.1674-3962.202109019

文獻標志碼:

A

摘要:

界面是碳纖維/樹脂復合材料重要的組成部分，決定著復合材料的綜合性能，然而由于碳纖維表面呈化學惰性，顯著影響復合材料的界面性能，因此通過對碳纖維表面改性以提高復合材料界面性能成為重要突破口。創新性地采用真空抽濾技術將碳納米纖維素（carbon nanocellulose fibers, CNFs）和碳納米管（carbon nanotubes, CNTs）引入圓周型碳纖維表面，制備CNF/CNT/碳纖維多尺度增強體以提高復合材料界面粘結強度。研究表明，采用改性后碳纖維的復合材料界面粘結強度提高了24.1%，主要來自于增強的纖維/樹脂間機械咬合和提升的纖維表面能。采用的真空抽濾技術克服了現有改性方法中普遍存在的環境污染、工藝復雜、加工成本高、效率低及降低纖維拉伸性能等缺點，為碳纖維等高性能纖維表面改性和復合材料界面性能提高提供新途徑。

Abstract:

The interphase is an important component of carbon fiber/resin composites, which determines the comprehensive properties of composites. However, since the surface of carbon fiber is chemically inert, it significantly reduces the interfacial adhesion of composites. Therefore, it is an essential breakthrough to improve the interfacial adhesion of composites by surface modification of carbon fiber. In this paper, carbon nanocellulose fibers (CNFs) and carbon nanotubes (CNTs) were introduced onto the surface of circumferential carbon fiber by vacuum filtration, the CNF/CNT/carbon fiber multi-scale reinforcement was introduced to improve the interfacial adhesion of composites. The results showed that the interfacial shear strength of composite with CNF/CNT/carbon fibers increases by 24.1%, which is mainly due to the contribution of enhanced mechanical interlocking between modified fibers and resin and improved fiber surface energy. Vacuum filtration adopted in this work overcomes the prevalent problems that exist in other surface modification methods, such as environmental pollution, complex process, high cost, low efficiency and reduction in fiber tensile strength. Our work reveals a new pathway for tuning fiber surface and improving interfacial properties of composites.