Design,Preparation And Performance Research Of Self-Hesling Cabin Sound-Adsorbing Materials

The aesthetics,practicality and durability of ship cabin interior materials have attracted more and more attention.Ship cabin interior materials often have to meet multiple performance requirements,but commonly used interior materials will age during use.Therefore,how to make the interior materials of the cabin not only meet certain sound absorption and insulation performance requirements,but also maintain the mechanical properties and appearance quality of the factory for a long time,that is,to improve the durability of the interior materials has become an urgent problem to be solved.Based on this background,this paper proposes to design and develop a self-healing polymer porous sound-absorbing material using simple chemical reagents and a simple and easy method.The purpose of the research is to diversify the functions of cabin sound-absorbing materials and provide more choices for cabin interior materials.First,carboxyl-terminated polybutadiene was used as the main raw material to coordinate with poly(4-vinylpyridine-co-styrene)by introducing dynamic metal coordination bonds.In this way,poly(4-vinylpyridine-co-styrene)was constructed to act as a node network that defines the permanent shape,carboxyl-terminated polybutadiene to act as a switching segment to fix the temporary shape,and zinc ions to act as a bridge connecting the two A dual polymer network system with both self-healing and shape memory properties.On the basis of this material system,nano-particles of carbon oxide nano-onions were added to explore the effect of additives on the performance of the material system.Fourier transform infrared spectroscopy and Raman spectroscopy were used to study the chemical composition of the self-healing polybutadiene rubber,and differential scanning calorimetry and thermogravimetric analysis were used to investigate the transition temperature and thermal stability of the self-healing polybutadiene rubber.And precise characterization of the mechanical properties and self-healing behavior of elastomers.Then,the dissipative particle dynamics method was used to simulate the phase behavior of the microscopic system of self-healing polybutadiene rubber.The results show that poly(4-vinylpyridine-co-styrene)in carboxyl-terminated polybutadiene can self-assemble into spherical micelles with styrene as the core and vinylpyridine as the outer core.As the content of poly(4-vinylpyridine-co-styrene)in carboxyl-terminated polybutadiene increased from 1% to 20%,the morphology of micelles changed from spherical to sheet-like.And the block length ratio in poly(4-vinylpyridine-co-styrene)does not affect the morphology of spherical micelles formed by the self-assembly of the system.Finally,metal ions are introduced into the system to form a "core-shell-crown" structure with styrene as the core,vinylpyridine as the shell,and metal ions as the crown,which provides a simulation basis for the microscopic architecture of shape memory-assisted self-healing.Finally,the porous structure is introduced into the self-healing system,the main factors affecting the sound absorption performance of the material were analyzed using the pressure acoustics module in the Comsol software.The simulation results show that the porosity is one of the most important factors determining the sound absorption coefficient,and the sound absorption performance is the best when the porosity is controlled at 0.8.The tortuosity factor affects the sound absorption effect of the material at low frequencies.When it increases from1.0 to 3.0,the maximum decrease in the sound absorption coefficient at 1900 Hz reaches 0.376.The flow resistivity can change the size of the corresponding peaks of the resonance sound absorption frequency and the anti-resonance sound absorption frequency,and the increase of the material thickness can also improve the sound absorption coefficient.