多巴胺改性氧化石墨烯对TDE-85环氧树脂的增韧研究

赵梦雪; 孔米秋; 刘成俊; 黄亚江; 李光宪

doi:10.11777/j.issn1000-3304.2017.17203

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多巴胺改性氧化石墨烯对TDE-85环氧树脂的增韧研究

研究论文 | 更新时间：2021-01-26

- 多巴胺改性氧化石墨烯对TDE-85环氧树脂的增韧研究
- Toughening of TDE-85 Epoxy Resin by Dopamine-modified Graphene Oxide
- 高分子学报 2018年0卷第6期页码：721-732
- 作者机构：
- 作者简介：
  
  E-mail: miqiukong@scu.edu.cn Mi-qiu Kong, E-mail: miqiukong@scu.edu.cn
  E-mail: guangxianli@scu.edu.cn Guang-xian Li, E-mail: guangxianli@scu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 51503133)和先进特种材料及制备加工新技术教育部重点实验室资助项目()
- DOI：10.11777/j.issn1000-3304.2017.17203
  中图分类号：
- 纸质出版日期：2018-6，
  
  收稿日期：2017-7-27，
  
  修回日期：2017-8-29，
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赵梦雪, 孔米秋, 刘成俊, 黄亚江, 李光宪. 多巴胺改性氧化石墨烯对TDE-85环氧树脂的增韧研究[J]. 高分子学报, 2018,0(6):721-732.

Meng-xue Zhao, Mi-qiu Kong, Cheng-jun Liu, Ya-jiang Huang, Guang-xian Li. Toughening of TDE-85 Epoxy Resin by Dopamine-modified Graphene Oxide[J]. Acta Polymerica Sinica, 2018,0(6):721-732.
赵梦雪, 孔米秋, 刘成俊, 黄亚江, 李光宪. 多巴胺改性氧化石墨烯对TDE-85环氧树脂的增韧研究[J]. 高分子学报, 2018,0(6):721-732. DOI： 10.11777/j.issn1000-3304.2017.17203.

Meng-xue Zhao, Mi-qiu Kong, Cheng-jun Liu, Ya-jiang Huang, Guang-xian Li. Toughening of TDE-85 Epoxy Resin by Dopamine-modified Graphene Oxide[J]. Acta Polymerica Sinica, 2018,0(6):721-732. DOI： 10.11777/j.issn1000-3304.2017.17203.

摘要

采用多巴胺改性氧化石墨烯(DGO)对TDE-85进行增韧研究. 研究发现，与纯TDE-85和TDE-85/GO复合材料相比，DGO的加入在保持TDE-85良好耐热性的同时使其力学性能得到了提高. 尤其是当DGO的含量为0.05 wt%时，TDE-85/DGO复合材料的韧性(临界应力强度因子，

)提高了284.2%. 这可归结为DGO与TDE-85基体树脂的界面结合性较好，当裂纹扩展时在DGO处出现了明显的裂纹阻碍和偏转现象.

Abstract

Graphene oxide (GO) is used to improve mechanical

thermal and functional properties of epoxy

in which the challenges are to achieve strong interfacial bonding between GO and epoxy resins with a uniform dispersion of GO within epoxy resins. GO can be partially reduced and exfoliated through modification by dopamine (DA)

which can improve the dispersion of DGO in epoxy resins and achieve better interfacial bonding between DGO and the epoxy resins. The purpose of this work is to investigate the effects of GO modification by DA (DGO) on the mechanical and thermal properties of a multifunctional epoxy —diglycidyl-4

5-epoxy-cyclohexane-1

2-dicarboxylate (TDE-85). First

GO and DA were mixed with deionized water and then reacted to prepare DGO. The obtained DGO without desiccation and the pristine GO are respectively dispersed in acetone with TDE-85

and TDE-85/DGO and TDE-85/GO mixture are therefore prepared by sonication and used as master batches. The master batches are then diluted by adding a certain amount of TDE-85 and cured at elevated temperature to obtain the composites of TDE-85/DGO and TDE-85/GO with varied contents of DGO and GO. Finally

the results of the modification are demonstrated

and the properties of the composites are characterized. It is found that

GO is partially reduced and exfoliated by DA modification

and the mechanical properties of TDE-85 is enhanced upon adding DGO without losing its heat resistance. Especially when the content of DGO is 0.05 wt%

the critical stress intensity factor (

)

tensile strength

elongation at break

and glass-transition temperature (

) of TDE-85/DGO composites are improved by 284.2%

17.59%

13.84% and 4.0%

respectively. The strong interfacial bonding between TDE-85 and DGO owing to the functional groups of PDA on the surface of DGO

the obvious crack deflection and crack pinning exhibited at the location of the DGO observed in SEM may be responsible for the improved mechanical properties. Furthermore

the tensile strength

and

of TDE-85/DGO system are compared with those of similar toughened materials by other methods

and the result suggests that the present process is an effective toughened method. Thus

this work provides a toughened epoxy for preparing fiber reinforced composites with high-strength and high-modulus.

关键词

多官能度环氧树脂石墨烯多巴胺增韧

Keywords

Multifunctional epoxy resinGraphite oxideDopamineToughening

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