生物质全降解制品四步式发泡成型机理研究

Research on the four-step foam forming mechanism of biomass materials

生物质全降解类制品相关研究是目前国内外学者研究的热点。针对生物质全降解制品成型机理缺乏研究的问题,提出了生物质全降解材料的四步式发泡成型机理,研究了发泡过程中原料溶解阶段、气泡成核阶段、气泡增长阶段和固化定型阶段等4阶段相变机制。在原料溶解阶段,分析了原料混合相变机理及植物纤维存在形式;在气泡成核阶段,探讨了生物质全降解材料的均相成核机理及影响成核质量的因素;在气泡增长阶段,分析了气泡增长过程的受力情况,探讨了气泡发生膨胀、并泡、塌陷和破裂等状况的机理;在固化定型阶段,探讨了开始固化时机和固化速度等因素对生物质全降解材料固化定型的影响。

At present, the research related biomass materials has become a hot topic. The four-step foam forming mechanism which was made up of raw material blending stage, bubble nucleation stage, bubble growth stage and curing finalization stage was first put forward according to the foam forming problem of biomass materials. In the raw material blending stage, the phase transition mechanism and existence form of plant fiber was ana- lyzed. In bubble nucleation stage, the homogeneous nucleation mechanism and influencing factors of nucleation quality were presented. In the bubble growth stage, the force analysis and transformation mechanism of bubble was discussed. In the curing finalization stage, the influencing factors of curing finalization, such as curing time and curing rate, were studied.