Surface Modification of Staple Carbon Fiber by Dopamine to Reinforce Natural Latex Composite

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.

In situ generation of sulfur using silica as a carrier in the wet mixing of natural rubber latex

“…The hardness of the rubber vulcanizate was tested by a Shore hardmeter (H17A, Wallance, England) in accordance with the standard ISO 7619‐2: 2004. The tensile and tear properties of the rubber vulcanizate were tested by a universal testing machine (TS2005b, GOTECH TESTING MACHINES CO., Ltd.) in accordance with the standards ISO 37: 2005 and ISO 34‐1: 2004 11 …”

Improved interfacial bonding strength of silicone rubber/carbon fiber modified by dopamine

“…Carbon fiber (CF) has been widely used in aerospace and automotive engineering due to its excellent mechanical properties, lightweight, and resistance to high and low temperatures. [1][2][3] However, it cannot be used directly owing to the fragility and particular structure of CF. [4][5][6] In industry, CF and polymer matrix are usually combined to form carbon fiber-reinforced polymer (CFRP) matrix composites, which have the properties of CF with the characteristics of the polymer matrix.…”

Enhancement of Green Tires Performance through Ultrasound-Assisted Mixing

“…In addition, the ultrasonic waves could also increase the storage modulus, tensile strength, and dispersion of internal dispersed phases of composite materials [ 27 , 28 ]. With the increase in the use of wet rubber mixing, ultrasonic waves are often used in the early stages of pretreatment of natural rubber latex and the preparation of master rubber [ 29 , 30 , 31 , 32 ].…”