文章信息/Info

Title:

Sizing Process of Continuous Carbon Fiber for 3D Printing and Its Influence on the Properties of Composites

文章編號(hào):

1674-3962(2020)05-0349-07

作者:

張曼玉; 劉騰飛; 田小永; 李滌塵

（西安交通大學(xué)機(jī)械工程學(xué)院，陜西 西安 710049）

Author(s):

ZHANG Manyu;  LIU Tengfei;  TIAN Xiaoyong;  LI Dichen

（School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, China）

關(guān)鍵詞:

3D打印; 碳纖維; 上漿; 界面; 力學(xué)性能; 復(fù)合材料; 尼龍6基體

Keywords:

3D printing;  carbon fiber;  sizing;  interface;  mechanical property;  composites;  Nylon 6 matrix

分類號(hào):

TB332;TQ327.3

DOI:

10.7502/j.issn.1674-3962.201910003

文獻(xiàn)標(biāo)志碼:

A

摘要:

對連續(xù)纖維增強(qiáng)熱塑性復(fù)合材料（CFRTPCs）進(jìn)行3D打印能夠?qū)崿F(xiàn)無模具快速制造，擴(kuò)展增材制造的實(shí)際應(yīng)用。為進(jìn)一步提高3D打印連續(xù)碳纖維增強(qiáng)復(fù)合材料制件的性能，采用熱塑性上漿劑對干碳纖維進(jìn)行上漿處理，以尼龍6（PA6）為基體打印連續(xù)碳纖維增強(qiáng)復(fù)合材料，對比了上漿前后碳纖維表面性質(zhì)及復(fù)合材料力學(xué)和界面性能。結(jié)果表明，上漿后碳纖維表面極性官能團(tuán)增加，纖維與樹脂浸潤性改善；纖維表面粗糙度增加，纖維與樹脂的機(jī)械結(jié)合力增強(qiáng)；上漿后碳纖維增強(qiáng)PA6復(fù)合材料較原始碳纖維增強(qiáng)PA6復(fù)合材料層間剪切強(qiáng)度提高42.2%，層間結(jié)合增強(qiáng)，彎曲強(qiáng)度提高了82%，彎曲模量提高2.46倍；3D打印的上漿后碳纖維增強(qiáng)PA6復(fù)合材料試樣斷面上有明顯纖維拔出現(xiàn)象，界面性能顯著改善。

Abstract:

Continuous fiber reinforced thermoplastic composites (CFRTPCs) by 3D printing technology can realize the rapid manufacture of complex composite parts without mold and promote the practical application of additive manufacturing. In order to further improve the service performance of 3D printed continuous carbon fiber reinforced composites, this paper adopted thermoplastic sizing agent to size dry carbon fiber, and printed continuous carbon fiber reinforced composites with nylon 6 (PA6) as the matrix, and compared the surface properties of carbon fiber before and after sizing and the mechanical and interface properties of the composites. The results showed that the polar functional groups on the surface of sized carbon fiber increased and the infiltration between fiber and resin improved. The surface roughness increased, and the mechanical adhesion between fiber and resin increased. The interlaminar shear strength of the sized carbon fiber reinforced PA6 composites was 42.2% higher than that of the non-sized carbon fiber reinforced; the interlaminar bonding was enhanced, the bending strength was improved by 82%, and the bending modulus was increased by 2.46 times. By comparing and analyzing the fracture microstructure of 3D printed composites, it is found that the fracture section of the sized carbon fiber reinforced composites had obvious fiber pull out phenomenon, and the interface performance was significantly improved.