炭纤维表面性质及上浆剂对炭纤维聚碳酸酯复合材料界面性能的影响

张为苏; 杨常玲; 姚莉丽; 李志豪; 李胜霞; 吕永根

炭纤维表面性质及上浆剂对炭纤维聚碳酸酯复合材料界面性能的影响

1.
东华大学化学化工与生物工程学院, 上海 201620;
2.
东华大学材料科学与工程学院, 上海 201620

基金项目: 国家自然科学基金（51672042）.

详细信息

作者简介:
张为苏,硕士研究生.E-mail:18301965326@163.com

通讯作者:
杨常玲,副教授.E-mail:yangcl@dhu.edu.cn;吕永根,教授.E-mail:yglu@dhu.edu.cn

中图分类号: TQ342⁺.74
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出版历程
- 收稿日期: 2018-12-09
- 录用日期: 2019-02-20
- 修回日期: 2019-01-28
- 刊出日期: 2019-02-28

Effect of surface properties and sizing agents on interfacial properties of carbon fiber reinforced polycarbonate composites

1.
College of Chemical, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China;
2.
College of Material Science and Engineering, Donghua University, Shanghai 201620, China

Funds: National Natural Science Foundations of China (51672042).

摘要

摘要: 通过对比未处理炭纤维、氧化炭纤维、商业化环氧树脂用炭纤维和实验室用聚氨酯及环氧树脂自上浆炭纤维的表面性质和其增强聚碳酸酯层间剪切强度，研究炭纤维表面性质与上浆剂对界面结构与性能的影响。结果表明，未处理炭纤维表面官能团与树脂的浸润性最小，层剪值最低为38.1 MPa。氧化纤维表面官能团增加，浸润性提高，层剪值提高到50.6 MPa。商业化环氧树脂用炭纤维表面官能团与树脂浸润性相比氧化纤维明显提高，层剪值相当，为50.8 MPa。说明浸润性是强界面产生前提，但不是充分条件。自上环氧浆炭纤维复合材料的层剪值相比商业炭纤维更低，约为31.7~39.5 MPa，而聚氨酯上浆炭纤维表面官能团与浸润性跟商业化环氧树脂用炭纤维相当，但层剪值提升18.9%，为60.4 MPa。说明界面结合强度提高的原因更依赖于氨酯键与炭纤维表面及聚碳酸酯树脂基体均能产生强的化学作用。
- 炭纤维 /
- 聚氨酯上浆剂 /
- 聚碳酸酯 /
- 复合材料
Abstract: Carbon fiber (CF)/polycarbonate composites were prepared by the same method using five different CFs. Two different PAN-based CFs were supplied by Jiangsu Hengsheng Carbon Fibers Inc. Both had been prepared under the same conditions but one had been anodically oxidized and sized with epoxy. The raw fiber (#1) was subjected to three treatments in our lab:(#2) anodic oxidation, (#3) anodic oxidation followed by sizing with polyurethane, and (#4) anodic oxidation followed by sizing with epoxy. The fiber that had been anodically oxidized and sized with epoxy by the manufacturer is designated #5. The surface functional groups, wettability and interlaminar shear strength (ILSS) of the five CFs composited with polycarbonate were investigated and compared. Results indicate that the smallest number of active groups exists on the #1 CFs, their wettability by polycarbonate is the worst and the ILSS of the composite is the lowest (38.1 MPa). The number of active groups on the #2 CFs is greatly increased, their wettability by polycarbonate is improved and the ILSS is increased to 50.6 MPa much higher that that of the composite with #1 CFs. The number of active groups on the #5 CFs is much higher than on the #2 CFs and their wettability is much better, but the ILSS of their composite is the same as that with the #2 CFs. The ILSS of the composite prepared using the #4 CFs is lower (about 31.7-39.5 MPa) than that with the #3 CFs. The number of the active groups on the #3 CFs and their wettability by polycarbonate are comparable to those of the #5 CFs, but their ILSS (60.4 MPa) greater by 18.9%, which is ascribed to the strong interactions between the polyurethane, the CF surface and the polycarbonate.
- Carbon fiber /
- Polyurethane sizing agent /
- Polycarbonate /
- Composites

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