Research on micro-morphology and reinforcing effect of partially dissolved microcrystalline cellulose in rubber
Cellulose has problems in dissolution and deep processing due to its high crystallinity.In this study,rubber/cellulose composites were prepared by partially dissolving microcrystalline cellulose using 1-butyl-3-methylimidazolium chloride as a medium,and then dry blending directly with rubber.The results show that the size of the undissolved part of cellulose is decreased,and the dissolved cellulose could be precipitated in situ to form rod-like regenerated cellulose with a diameter of 100 nm and a length of about 1 μm during the rubber mixing process,which effectively improves the reinforcing effect of cellulose.When the mixing temperature was 80℃and 0.83 phr cellulose/ionic liquid was added,the tensile and tear strengths of the vulcanised rubber increased by 22.4%and 45.4%,respectively,compared to the rubber with no cellulose.The method is based on conventional rubber mixing technology,and the process is a green and efficient way of utilizing cellulose without any waste liquid discharge.
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