改性凹凸棒土-氧化石墨烯/环氧树脂复合材料的力学性能和热电性能

孙琦; 周宏; 张航; 刘国隆

doi:10.13801/j.cnki.fhclxb.20190918.002

改性凹凸棒土-氧化石墨烯/环氧树脂复合材料的力学性能和热电性能

doi: 10.13801/j.cnki.fhclxb.20190918.002

孙琦¹,
周宏^{1, 2, ,},
张航¹,
刘国隆¹

1.
哈尔滨理工大学　材料科学与工程学院，哈尔滨 150040
2.
哈尔滨理工大学　工程电介质及其应用教育部重点实验室，哈尔滨 150080

基金项目: 黑龙江省自然科学基金(E2015058)

详细信息

通讯作者:
周宏，博士，教授，硕士生导师，研究方向为纳米复合电介质材料　E-mail：hongzhou@hrbust.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2019-05-30
- 录用日期: 2019-08-27
- 网络出版日期: 2019-09-18
- 刊出日期: 2020-05-15

Mechanical, thermal and dielectric properties of modified attapulgite-graphene oxide/epoxy composites

SUN Qi¹,
ZHOU Hong^{1, 2
, ,},
ZHANG Hang¹,
LIU Guolong¹

1.
School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China
2.
Key Laboratory of Engineering Dielectric and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China

摘要

摘要: 分别用硅烷偶联剂KH560改性凹凸棒土(Attapulgite，ATP)和氧化石墨烯(Graphene oxide，GO)，并将其复合制备ATP-GO复合物。以环氧树脂(Epoxy，EP)为基体，采用原位聚合法制备ATP-GO/EP复合材料。采用SEM和FTIR对ATP-GO复合物的形貌和化学结构进行表征。结果表明：ATP与GO成功键合并附着在GO表面；ATP-GO的加入，提高了EP的冲击强度、弯曲强度和热稳定性，降低了其介电常数和介电损耗。3wt%ATP-0.5wt%GO/EP复合材料的弯曲强度和冲击强度分别为138.58 MPa和20.80 kJ/m²，比纯EP分别提高了75.5%和351.6%，而其介电常数和介电损耗分别低至3.36和0.0118，比纯EP降低了7.7%和27.3%。
- 环氧树脂 /
- 凹凸棒土 /
- 氧化石墨烯 /
- 复合材料 /
- 力学性能
Abstract: The attapulgite (ATP) and graphene oxide (GO) were modified with silane coupling agent KH560, and they were composited to obtain the ATP-GO hybrids. Then the ATP-GO/epoxy resin (EP) composites were prepared by in-situ polymerization using the EP as the matrix. The morphology and chemical structure of the ATP-GO hybrids were characterized by SEM and FTIR. The results show that ATP and GO are successfully composed with ATP attached on the surface of GO. The impact strength, bending strength and thermal stability of the ATP-GO/EP composite are enhanced by incorporation of ATP-GO hybrid fillers, whereas the dielectric constant and the dielectric loss are reduced. The bending strength and impact strength of 3wt%ATP-0.5wt%GO/EP composites reach 138.58 MPa and 20.80 kJ/m², which are 75.5% and 351.6% higher than that of the pure EP, respectively. While the dielectric constant and dielectric loss of ATP-GO/EP composites decrease to 3.36 and 0.0118, which are 7.7% and 27.3% lower than that of the pure EP.
- epoxy resin /
- attapulgite /
- graphene oxide /
- composites /
- mechanical properties

HTML全文

图 1 凹凸棒土(ATP)和氧化石墨烯(GO)的改性及ATP-GO复合物的制备过程

Figure 1. Procedures for the modification of attapulgite(ATP) and graphene oxide(GO) as well as the preparation of ATP-GO hybrids

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图 2 ATP，ATP-KH560，GO，GO-KH560及ATP-GO的红外谱图

Figure 2. FTIR spectra of ATP, ATP-KH560, GO, GO-KH560 and ATP-GO

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图 3 ATP及复合物ATP-GO的SEM图像

Figure 3. SEM images of ATP and the hybrids of ATP-GO

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图 4 ATP-GO/EP复合材料的SEM图像

Figure 4. SEM images of the ATP-GO/EP composites

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图 5 ATP-0.5wt%GO/EP复合材料的力学性能

Figure 5. Mechanical properties of ATP-0.5wt%GO/EP composites

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图 6 ATP-GO/EP复合材料的热失重曲线

Figure 6. TGA curves of ATP-GO/EP composites

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图 7 ATP填充量对ATP-GO/EP复合材料介电常数(a)和介电损耗(b)的影响

Figure 7. Effects of ATP content on dielectric constant (a) and dielectric loss (b) of ATP-GO/EP composites

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表 1 纯EP和ATP-GO/EP复合材料的热重分析数据

Table 1. Thermogravimetric analysis data of pure EP and ATP-GO/EP composites

Sample	Temperature for mass loss/℃		T_HRI*/℃	T₆₀₀/%
Sample	T_d5	T_d30	T_HRI*/℃	T₆₀₀/%
Neat EP	305	395	178	8.9
1wt%ATP-0.5wt%GO/EP	283	399	173	10.4
3wt%ATP-0.5wt%GO/EP	351	399	186	19.7
5wt%ATP-0.5wt%GO/EP	325	396	180	12.7
7wt%ATP-0.5wt%GO/EP	352	398	186	14.3
Notes：T_HRI—Heat resistance index, T_HRI=0.49[T_d5+0.6(T_d30-T_d5)]；T_d5，T_d30—Corresponding to decomposition temperature of 5% and 30% mass loss.

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