Research On Preparation And Application Of Modified CB/Rubber Nanocomposite

Due to the needs of green tires and the construction of ecological civilization,the research on high performance,low energy consumption and environmentally friendly rubber composite materials has become a research hotspot and difficulty in the modern rubber industry.Carbon black is a very important reinforcing agent for rubber,which can significantly improve rubber modulus,strength and abrasion performance,and greatly broaden the application fields of rubber.However,carbon black-reinforced rubber has defects such as hysteresis loss,large dynamic energy loss,and high heat generation.On the one hand,it leads to an increase in automobile fuel consumption,on the other hand,it causes thermal degradation of the rubber,shortens its service life,and increases driving hazards.Therefore,this topic adopts a coupling agent suitable for carbon black,and hopes to solve the problems of high heat generation and large hysteresis loss of carbon black rubber composites by constructing the interface between carbon black rubber.This subject uses natural rubber as the matrix to study the interaction mechanism of tea polyphenols and M series coupling agents with carbon black,and their influence on the properties of natural rubber composites.First,tea polyphenols were used to modify carbon black in the water phase,and the combination mechanism of the two was studied.The experimental results show that tea polyphenols and carbon black are mainly combined through strong physical adsorption.Tea polyphenols can be adsorbed on the surface of carbon black or within the pore size,and the adsorption of tea polyphenols will not change carbon black crystals.By blending tea polyphenols with carbon black and rubber directly,tea polyphenols can act as a dispersant.It can promote the dispersion of carbon black and promote rubber vulcanization,reducing the dynamic fatigue temperature rise of rubber by 9.5%and rolling resistance reduced by 11.7%,and improved wet skid resistance by 14.3%.M series coupling agent is a new type of silane coupling agent.Its molecular structure contains both long carbon chains and polysulfide bonds.It can also participate in the cross-linking reaction of rubber.Therefore,by using the adsorption between long carbon chains and carbon black,polysulfide bond and rubber cross-linking,we can build the interface bond between carbon black and rubber.We first studied the interaction mechanism between M series coupling agent and carbon black,and found that temperature can affect the adsorption capacity of M series coupling agent on the surface of carbon black,and the adsorption amount of M coupling agent on the surface of carbon black is the largest at 50℃ and 70℃.The main interaction between the M series coupling agent and carbon black is physical adsorption,in addition,there is also chemical adsorption.The application of M series coupling agents in rubber composite materials can significantly promote the vulcanization of rubber,and at the same time it can reduce dynamic fatigue temperature rise,improve wear resistance,reduce rolling resistance,and make the distribution of carbon black in rubber more uniformly,M series coupling agents is very suitable for rubber nanocomposites reinforced by carbon black.