电泳沉积氧化石墨烯的碳纤维表面改性及其增强环氧树脂复合材料界面性能

李娜; 李晓屿; 刘丽; 汪路遥; 徐少东; 杨建成; 黄玉东; 王彩凤

doi:10.13801/j.cnki.fhclxb.20191120.001

电泳沉积氧化石墨烯的碳纤维表面改性及其增强环氧树脂复合材料界面性能

doi: 10.13801/j.cnki.fhclxb.20191120.001

李娜^1,,
李晓屿^1,,
刘丽^2,,
汪路遥^1,,
徐少东^1,,
杨建成^1,,
黄玉东^2,,
王彩凤^1, ,

1.
辽宁石油化工大学　化学化工与环境学部，抚顺 113001
2.
哈尔滨工业大学　化工与化学学院，哈尔滨 150001

基金项目: 辽宁省博士科研启动基金计划项目(2019-BS-156)；辽宁省教育厅科学研究经费项目(L2019041)

详细信息

通讯作者:
王彩凤，博士，副教授，硕士生导师，研究方向为碳纤维表面改性　E-mail：wcf2lxy@163.com

中图分类号: TB332
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- 文章访问数: 1307
- HTML全文浏览量: 220
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- 被引次数: 0
出版历程
- 收稿日期: 2019-08-04
- 录用日期: 2019-08-04
- 网络出版日期: 2019-11-20
- 刊出日期: 2020-07-15

Surface modification of carbon fiber(CF) deposited graphene oxide(GO) by electrophorestic deposition and interfacial properties of GO-CF/epoxy composites

LI Na^1
,,
LI Xiaoyu^1
,,
LIU Li^2
,,
WANG Luyao^1
,,
XU Shaodong^1
,,
YANG Jiancheng^1
,,
HUANG Yudong^2
,,
WANG Caifeng^{1
, ,}

1.
College of Chemistry, Chemical Engineering and Environment, Liaoning Shihua University, Fushun 113001, China
2.
School of Chemical and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 采用超声辅助电泳沉积法，以异丙醇作为溶剂，在连续碳纤维(CF)表面沉积一层氧化石墨烯(GO)，对CF表面进行改性。再经200℃高温处理来增强(GO)与CF之间的黏合性，从而增加CF/环氧树脂(EP)复合材料的界面结合强度。利用SEM和AFM对改性前后CF的表面形貌及微观结构变化进行了表征，通过XPS对改性前后CF表面官能团的变化进行了检测。结果表明，在CF表面沉积GO并经200℃处理后，有效地部分还原了GO(RGO)，填补或桥联了CF表面缺陷，使改性后CF的拉伸强度提高了34.58%。同时，高温处理使RGO与CF之间生成牢固的化学键，从而提高了RGO与CF之间的结合强度，最终使RGO-CF/EP复合材料的界面剪切强度(IFSS)提高了69.9%。
- 碳纤维 /
- 氧化石墨烯 /
- 复合材料 /
- 界面性能 /
- 电泳沉积 /
- 表面形貌
Abstract: The graphene oxide(GO) was deposited on the surface of continuous carbon fiber(CF) by ultrasonic assisted electrophoresis deposition in isopropyl alcohol for the modification of the surface of CF. Then the adhesion between GO and CF was enhanced by high temperature treatment under 200℃, which would increase the interfacial bonding strength of CF/epoxy(EP) composites. The surface morphology and microstructure of the CF before and after modification were characterized by SEM and AFM, and the changes of the surface functional groups of CF before and after modification were tested by XPS. The results show that the tensile strength of the modified CF is increased by 34.58% after deposition of GO and treatment under 200℃. The reason for the improvement is that some partially reduced GO sheets fill or bridge the defects on the surface of CF. At the same time, the adhesion between RGO and CF is enhanced by the linkage of chemical bond after high temperature treatment. And the interfacial shear strength (IFSS) of RGO-CF/EP composites is increased by 69.9%.
- carbon fiber /
- graphene oxide /
- composite /
- interface property /
- electrophoresis deposition /
- surface topography

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图 1 超声辅助电泳沉积氧化石墨烯(GO)(a)、超声处理对GO沉积的影响(b)和CF单丝拉伸强度样品制作(c)

Figure 1. Deposition graphene oxide(GO) with ultrasonic-assisted electrophoretic(a), effect of ultrasonic treatment on GO deposition(b) and preparation of CF monofilament tensile strength samples(c)

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图 2 GO的 SEM(a)、TEM(b)、AFM(c)图像及吸附Mg²⁺的GO稳定悬浮液(d)

Figure 2. SEM(a), TEM(b), AFM(c) images of GO and suspension of GO absorbed Mg²⁺ (d)

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图 3 脱浆CF(a)、GO-CF-U(b)、GO-CF(c)和RGO-CF-U(d)的SEM图像

Figure 3. SEM images of desized CF(a), GO-CF-U(b), GO-CF(c), RGO-CF-U(d)

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图 4 GO(a)、脱浆CF(b)、GO-CF-U(c)、RGO-CF-U(d)的XPS图谱

Figure 4. XPS spectra of GO(a), desized CF(b), GO-CF-U(c), RGO-CF-U(d)

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图 5 GO、脱浆CF、GO-CF-U、RGO-CF-U的接触角和表面能

Figure 5. Contact angles and surface energies of GO, desized CF, GO-CF-U, RGO-CF-U

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图 6 CF、脱浆CF、GO-CF、GO-CF-U、RGO-CF和RGO-CF-U的拉伸强度

Figure 6. Tensile strength of CF, desized CF, GO-CF, GO-CF-U, RGO-CF and RGO-CF-U

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图 7 电泳沉积与热处理之间的GO-CF表面结构变化示意图

Figure 7. Schematic diagram of surface structure change between EPD and thermal treatment of GO-CF

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图 8 GO与CF的化学反应示意图

Figure 8. Schematic diagram of chemical reaction between GO and CF

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图 9 RGO-CF-U断口的SEM图像

Figure 9. SEM image of fracture morphology of RGO-CF-U

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图 10 CF/环氧树脂(EP)、脱浆CF/EP、GO-CF/EP、GO-CF-U/EP、RGO-CF/EP和RGO-CF-U/EP复合材料的界面剪切强度

Figure 10. Interfacial shear strength(IFSS)of CF/EP, desized CF/epoxy(EP), GO-CF/EP, GO-CF-U/EP, RGO-CF/EP and RGO-CF-U/EP composite

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图 11 拔脱前后的脱浆CF/EP复合材料 ((a), (b))及拔脱后GO-CF-U/EP(c)和RGO-CF-U/EP复合材料(d)的SEM图像

Figure 11. SEM images of before(a) and after(b) removal of desized CF/EP composite, GO-CF-U/EP(c) and RGO-CF-U/EP(d) composite after removal

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图 12 脱浆CF/EP、GO-CF/EP和RGO-CF/EP复合材料界面强度提高机制

Figure 12. Mechanism of improving interfacial strength of desized CF/EP, GO-CF/EP and RGO-CF/EP composites

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表 1 改性碳纤维(CF)的电泳沉积和热处理参数

Table 1. Electrophoresis deposition and heat treatment parameters for modified carbon fiber(CF)

Sample	C_GO/ (mg·mL⁻¹)	Voltage/ (V·cm⁻¹)	Time/ min	Ultra- sonic	Annealing(200℃)
GO-CF	0.1	160	1	No	No
GO-CF-U	0.1	160	1	Yes	No
RGO-CF	0.1	160	1	No	Yes
RGO-CF-U	0.1	160	1	Yes	Yes
Notes: GO—Graphene oxide; C_GO—Concentration of GO; GO-CF—Electrophoretic deposition GO on CF; GO-CF-U—Deposition GO on CF by ultrasonic assisted electrophoresis deposition; RGO-CF—Electrophoretic deposition RGO on CF; RGO-CF-U —Deposition GO on CF by ultrasonic assisted electrophoresis deposition; RGO—Reduced graphene oxide.

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表 2 GO、脱浆CF、GO-CF-U、RGO-CF-U的表面元素组成

Table 2. Composition of surface elements of GO, desized CF, GO-CF-U, RGO-CF-U

Sample	Element mass fraction/wt%		O/C
Sample	C	O	O/C
Desized CF	87.37	12.63	0.1445
GO	69.46	30.54	0.4397
GO-CF-U	77.03	22.97	0.2982
RGO-CF-U	84.99	15.01	0.1766

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