Abstract
Carbon fiber significantly enhances the mechanical, thermal and electrical properties of rubber composites, which are widely used in aerospace, military, national defense and other cutting-edge fields. The preparation of a high-performance carbon fiber rubber composite has been a research hotspot, because the surface of carbon fiber is smooth, reactive inert and has a poor adhesion with rubber. In this paper, a high-performance rubber composite is prepared by mixing dopamine-modified staple carbon fiber with natural latex, and the mechanisms of modified carbon fiber-reinforced natural latex composite are explored. The experimental results show that the surface-modified staple carbon fiber forms uniform and widely covered polydopamine coatings, which significantly improve the interface adhesion between the carbon fiber and the rubber matrix. Meanwhile, when the concentration of dopamine is 1.5 g/L and the staple carbon fiber is modified for 6h, the carbon fiber rubber composite shows excellent conductivity, thermal conductivity, and dynamic mechanical properties, and its tensile strength is 10.6% higher than that of the unmodified sample.
Highlights
Carbon fiber (CF) is formed by the thermal conversion of organic fibers, and has a high strength, high modulus, high thermal conductivity, chemical corrosion resistance and other excellent properties [1,2]
A polydopamine layer was grown on the surface of CF, after being modified by dopamine, which was covered by a latex film formed by natural latex, and bonded with the rubber matrix to produce good interfacial interaction
The cohesion interaction between andthe therubber rubber matrix matrix can clearly from between thethe and canbebeseen seen clearly from the electron microscope image, which is important for the evaluation of surface-modified electronthe microscope image, which is important for the evaluation of surface-modified is impregnated with natural rubber latex (NRL) to form an adhesive film on its surface, which strengthens the
Summary
Carbon fiber (CF) is formed by the thermal conversion of organic fibers, and has a high strength, high modulus, high thermal conductivity, chemical corrosion resistance and other excellent properties [1,2]. A good interface between the CF and the rubber matrix is significantly difficult to obtain, and this plays a crucial role in preparing high-performance CFRC. This has resulted in extensive research by scholars at home and abroad. Du et used ultraviolet radiation to to greatly shorten the self-polymerization of dopamine. NRL and to prepare the mechanisms of dopamine surface-modified carbon fiber-reinforced natural rubber latex composites mechanisms of dopamine surface-modified carbon fiber-reinforced natural areConsequently, systematically the studied. The effects of dopamine concentration and modification time rubber latex composites are systematically studied. The effects of dopamine on the properties of composites are studied. Concentration and modification time on the properties of composites are studied
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