The preparation of microcrystalline cellulose–nanoSiO2 hybrid materials and their application in tire tread compounds

• Published in: Journal of applied polymer science Vol. 134; no. 20; pp. 11 - n/a
• Main Authors: Sun, Jutao, Liu, Xiaoling, Liang, Yunhao, Wang, Lili, Liu, Yao
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 20-05-2017
• Subjects: hybrid modification; Materials science; microcrystalline cellulose; microreactor; nano‐SiO2; Polymers; rubber compounds
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.44796

ABSTRACT
Microcrystalline cellulose (MCC) was hybridized with nano‐SiO2 to improve its interaction with a rubber matrix. The hybrids (MCC–SiO2) were prepared with the “microreactor” and “sol–gel” technologies, using MCC as the carrier and tetraethoxysilane as the precursor. The structure and morphology of the hybrids were studied by infrared spectrometry, thermogravimetric analysis, and scanning electron microscopy. The results showed that the nano‐SiO2 had been loaded successfully on the surface of the MCC with a loading ratio of approximately 30%. The nano‐SiO2 can take on the morphologies of particles, tubes, or rods by controlling the size of the “microreactor”. The hybrids were then used in silica/SSBR compounds to replace part of the silica, and their effects on the physio‐mechanical and dynamic properties were discussed. The results showed that the vulcanizates with the hybrids had improved physio‐mechanical and dynamic properties. The vulcanizates of MCC–SiO2 also had a higher wet‐skid resistance and a lower rolling resistance than did the silica vulcanizates when they were used in tire tread compounds. The SEM photos showed that the interfacial adhesion between the MCC and rubber was improved. The size of the MCC hybrids was also in situ decreased during the processing of the rubber compounds. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44796.