Biodegradable microcrystalline cellulose composites: Optimization of isotropic polybutene-1 crystallization and its vibration and noise reduction properties

With the acceleration of industrialization, environmental noise and mechanical vibration problems are becoming increasingly serious. Traditional polymer damping materials have shortcomings in durability, environmental protection and performance optimization. In this study, MCC-iPB biodegradable composites were prepared. The interface and crystallization behavior were optimized by introducing maleic anhydride grafted polybutene-1 (MAPB). Experimental results showed that MCC can accelerate the crystal transformation and significantly improve the thermal stability and storage modulus. In the comparative experiment under the simulated operating conditions of industrial motors, compared with traditional polyurethane foam materials, the MCC-iPB composite material can reduce the vibration acceleration by about 40%, the sound pressure level by 6–9 dB, and the power fluctuation by more than 50% in the range of 500–2500 Hz, showing excellent energy dissipation and vibration suppression capabilities. This material has broad engineering application prospects in the fields of building sound insulation, automobile structure noise reduction and high-frequency industrial equipment shock absorption, and provides a new theoretical basis and experimental support for the development of sustainable vibration and noise reduction materials.