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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:

42

期数:

2023年第03期

页码:

260-265

栏目:

出版日期:

2023-03-30

文章信息/Info

Title:

Preparation and Performance Analysis of 3D Printing Continuous Carbon Fiber Prepreg

文章编号:

1674-3962(2023)03-0260-06

作者:

李慧斌1; 刘玉君1; 汪骥1; 2; 3; 李瑞1; 刘晓 1

（1.大连理工大学船舶工程学院，辽宁 大连 116024） （2.高新船舶与深海开发装备协同创新中心，上海200240） （3.工业装备结构分析国家重点实验室，辽宁 大连 116024）

Author(s):

LI Huibin1;  LIU Yujun1;  WANG Ji1; 2; 3;  LI Rui1;  LIU Xiao1

(1. School of Ship Engineering, Dalian University of Technology, Dalian 116024, China) （2. Collaborative Innovation Center of High Tech Ship and Deep Sea Development Equipment, Shanghai 200240, China） （3. State Key Laboratory of Industrial Equipment Structure Analysis, Dalian 116024, China)

关键词:

3D打印; 碳纤维; 上浆; 力学性能; 复合材料

Keywords:

3D printing;  carbon fiber;  sizing;  mechanical properties;  composites

分类号:

TB332；TQ327.3

DOI:

10.7502/j.issn.1674-3962.202106010

文献标志码:

A

摘要:

3D打印连续碳纤维增强热塑性树脂复合材料（continuous carbon fiber reinforced thermoplastic composites, CCFRTPCs）因具有轻质、高强等优势被广泛应用于各个领域。在CCFRTPCs打印过程中，碳纤维作为增强体，与树脂之间的界面结合性能是影响该材料力学性能的关键因素。对连续碳纤维进行预处理，增强纤维与树脂间的界面性能是当前研究热点。为提高3D打印连续碳纤维增强聚碳酸酯（PC）复合材料的力学性能，首先采用不同浓度水性PC上浆剂对连续碳纤维原丝进行上浆预处理，研究上浆剂浓度变化对连续碳纤维上浆量的影响规律；然后以PC为基体，分别以连续碳纤维原丝和不同上浆量预浸丝为增强体打印复合材料，观察对比上浆前后连续碳纤维的表面形貌并分析上浆处理对复合材料界面和力学性能的影响。研究结果表明，随着上浆剂浓度的增大，连续碳纤维上浆量不断增大，但增幅逐渐减缓。上浆后的连续碳纤维表面粗糙度增加，内部单丝间界面结合得到改善。不同上浆量预浸丝复合材料的力学性能较纤维原丝复合材料均有所提高，其中在本实验条件下40%浓度（质量分数）上浆剂所对应的29.59%上浆量为连续碳纤维最优上浆量。与纤维原丝复合材料相比，29.59%连续碳纤维预浸丝复合材料的弯曲强度提升了15.82%，弯曲模量提升了75.58%，拉伸强度、层间剪切强度和冲击强度分别提升了90.9%，57.22%和56.45%。

Abstract:

3D printing continuous carbon fiber reinforced thermoplastic composites (CCFRTPCs) are widely used in various fields because of their advantages of light weight and high strength. In the printing process of the composites, carbon fiber is used as the reinforcement, and the interfacial bonding between carbon fiber and resin is the key factor affecting the mechanical properties of materials. Pretreatment of continuous carbon fiber to enhance the interfacial properties between fiber and resin is a current research hotspot. In order to improve the mechanical properties of 3D printing continuous carbon fiber reinforced polycarbonate (PC) composites, firstly, different concentrations of waterborne PC sizing agent were used to size the continuous carbon fiber precursor. And the influence of sizing agent concentration on continuous carbon fiber sizing was studied. Then, using PC as matrix, continuous carbon fiber precursor and prepreg with different sizing amount as reinforcement, the surface morphology of continuous carbon fiber before and after sizing was observed and compared, and the influence of sizing treatment on the interfacial and mechanical properties of the composite was analyzed. The results showed that with the increase of sizing agent concentration, the sizing amount of continuous carbon fiber increases, but the increase rate slows down. After sizing, the surface roughness of continuous carbon fiber increases, and the interfacial bonding between internal monofilaments is improved. The results showed that the mechanical properties of the fiber prepreg composites with different sizing amount are better than those of the fiber precursor composites. In this paper, the optimal sizing amount is 29.59% corresponding to a 40% concentration of sizing agent. Compared with carbon fiber precursor composites, the flexural strength, flexural modulus, tensile strength, interlaminar shear strength and impact strength of the 29.59% prepreg composites increased by 15.82%, 75.58%, 90.9%, 57.22% and 56.45%, respectively.

备注/Memo

备注/Memo:

收稿日期：2021-06-14修回日期：2021-09-07 基金项目：国家自然科学基金项目（51979033）；大连市科技创新 基金项目（2019J12GX021） 第一作者：李慧斌，男，1995年生，硕士研究生 通讯作者：汪骥，男，1978年生，教授，硕士生导师， Email:wangji@dlut.edu.cn

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更新日期/Last Update: 2023-02-27