Study On The Structure And Properties Of Rubber/clay Nanocomposites By Clay Modificatio

Clay material has a unique sheet structure and is cheap and readily available,making it a widely researched and used filler.Clay is stacked due to the interaction force between the layers,and the clay itself is a silicate inorganic mineral,so it is poorly compatible with organic polymer materials and needs to be organically modified before it can be put into use.Industrial production of organic clay usually adopts the solution method,which is easy to produce a large amount of wastewater,and the modification efficiency is relatively general,and it is necessary to have a green,efficient and environmentally friendly modification method for the production and manufacture of organic clay.Due to its unique sheet structure and good interface bond with rubber matrix,the modified clay/rubber nanocomposites have become a hot topic in the field of materials science.In this paper,two modification methods(solid-state and semi-solid-state)different from solution modification were introduced to reduce the consumption of water resources during the modification process,and the modification efficiency was improved,and two aliphatic quaternary ammonium cation modifiers with different carbon chain lengths were used to compare the effects of carbon chain length on clay modification.The modified clay was added to three rubber matrices with different properties,and three types of rubber/clay nanocomposites were prepared by melt method,and the relationship between structure and performance was analyzed in detail,and the rules were summarized.The main conclusions reached by the study are:(1)after using two different modification methods(solid and semi-solid),both of which successfully modified inorganic clay,after using octadecyl trimethylammonium bromide as the modifier,the layer spacing of clay increased by133% and 268%,while the layer spacing of solution modified clay increased by 239%,and the semi-solid modification method reduced water consumption by 99.46% compared with the solution modification method,and the modification efficiency increased by 25%.(2)All kinds of modified clay will promote the mechanical tensile strength of rubber to increase,of which natural rubber and neoprene have less coating properties for modified clay,semi-solid modified clay and solution modified clay add 3 phr,the mechanical properties of rubber are optimal,while nitrile rubber can accommodate more clay,when the modified clay is added to15 phr,the mechanical properties of rubber are optimal,and within the change of added organic clay content,the change law of tensile strength of natural rubber and neoprene is similar.The tensile strength is first increased and then decreased,and the tensile strength change law of nitrile rubber is rising.(3)The modified clay forms an intercalation structure in the rubber matrix,which will promote the improvement of the air tightness,thermal stability and resistance to organic solvents of the rubber material,and the comprehensive performance of natural rubber is the most excellent among the three rubber matrix.