Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement

doi:10.1016/j.cjche.2020.01.015

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (4): 1187-1193.DOI: 10.1016/j.cjche.2020.01.015

• Materials and Product Engineering • Previous Articles

Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement

Yingyan Mao^1,2, Chao Wang³, Li Liu⁴

1 Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;
2 National Engineering Research Center for Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;
3 Beijing Special Equipment Inspection & Testing Center, Beijing 100029, China;
4 Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, China

Received:2019-10-20 Revised:2019-12-31 Online:2020-07-27 Published:2020-04-28
Contact: Yingyan Mao
Supported by:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51073008 and 51103005).

Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement

Yingyan Mao^1,2, Chao Wang³, Li Liu⁴

1 Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;
2 National Engineering Research Center for Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing 100730, China;
3 Beijing Special Equipment Inspection & Testing Center, Beijing 100029, China;
4 Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, Beijing 100029, China

通讯作者: Yingyan Mao
基金资助:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51073008 and 51103005).

Abstract

Abstract: Graphene oxide (GO) has recently attracted substantial interest as a possible reinforcing agent for next generation rubber composite materials. In this research, GO was incorporated in natural rubber (NR) composites through latex co-coagulation technique. The microstructures of GO/NR composites were characterized through a combination of transmission electron microscope, scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and Differential scanning calorimeter. The results showed that highly exfoliated GO sheets were finely dispersed into NR rubber matrix with strong interface interaction between GO and NR. The mechanical properties of the GO/NR composites were further evaluated. The results showed that the tensile strength, tear strength and modulus can be significantly improved at a content of less than 2 phr. Especially, GO exhibited specific reinforce mechanism in NR due to the stress-induced crystallization effects of NR. The stress transfer from the NR to the GO sheets and the hindrance of GO sheets to the stress-induced crystallization of NR were further displayed in stress-strain behavior of GO/NR composites. These enhanced properties were attributed to the high surface area of GO sheets and highly exfoliated microstructures of GO sheets in NR.

Key words: Graphene oxide, Natural rubber, Microstructure, Stress-strain behavior, Composites

摘要： Graphene oxide (GO) has recently attracted substantial interest as a possible reinforcing agent for next generation rubber composite materials. In this research, GO was incorporated in natural rubber (NR) composites through latex co-coagulation technique. The microstructures of GO/NR composites were characterized through a combination of transmission electron microscope, scanning electron microscope, X-ray diffraction, Fourier transform infrared spectroscopy, and Differential scanning calorimeter. The results showed that highly exfoliated GO sheets were finely dispersed into NR rubber matrix with strong interface interaction between GO and NR. The mechanical properties of the GO/NR composites were further evaluated. The results showed that the tensile strength, tear strength and modulus can be significantly improved at a content of less than 2 phr. Especially, GO exhibited specific reinforce mechanism in NR due to the stress-induced crystallization effects of NR. The stress transfer from the NR to the GO sheets and the hindrance of GO sheets to the stress-induced crystallization of NR were further displayed in stress-strain behavior of GO/NR composites. These enhanced properties were attributed to the high surface area of GO sheets and highly exfoliated microstructures of GO sheets in NR.

关键词: Graphene oxide, Natural rubber, Microstructure, Stress-strain behavior, Composites

Yingyan Mao, Chao Wang, Li Liu. Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement[J]. Chinese Journal of Chemical Engineering, 2020, 28(4): 1187-1193.

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Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement

Preparation of graphene oxide/natural rubber composites by latex cocoagulation: Relationship between microstructure and reinforcement

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