Mechanism research on the effect of the micro characteristics of filler particles on different bio‐composites formed by RPLA compounded with bio‐polymer fillers prepared by systematic grinding strategies

Abstract Based on the concept of green earth, many scholars have proposed many future research hotspots such as carbon‐negative technology, circular economy and green energy. The purpose of this research is to explore the carbon‐negative technologies and waste materialization technologies to alleviate the greenhouse effect and environmental degradation. Improper grinding strategies lead to some problems such as low utilization of filler and high cost of technologies. This researches not only improve the utilization efficiency of various filler powders produced by systematic grinding strategies but also propose waste practical materialization technologies to recycle several bulk wastes such as bio‐plastic waste, agricultural waste and secondary waste from grinding process. This paper evaluates the performance of bio‐composite from many aspects: mechanical properties, thermal conductivity, SEM morphology and TGA analysis. Simulation and mechanism analysis of microstructure of the bio‐composites which undergo formation process are carried out based on various experimental results including micro characteristics of filler and multitudinous properties of bio‐composites. These researchs, which are vital to achieve industrialization scale materialization of bio‐polymer fillers, have certain academic significance and provide the basis for the further development of sustainable research on diversified recycle of wastes. The researchs found that SBFP filler has the best comprehensive benefits involving cost, mechanical properties and other properties. Larger particle size fillers such as SRBFP produce aggregates and voids which reduce the TGA and thermal conductivity of the bio‐composites. Highlights This research focuses on enhancing the feasibility of utilizing natural polymer fillers in the industrial manufacturing of bio‐composites. Researching systematic grinding strategies to produce various fillers can help reduce the highest cost of industrial manufacturing of bio‐composites. This research discusses the influence of filler's variables on mechanical performance from two perspectives. Explored the impact of fluctuation in filler loading on mechanical performance from a vertical perspective. The mechanical performance of biocompsites contained fillers with different characteristics is comparatively analyzed from a horizontal perspective. Qualitative and quantitative analysis are conducted on polymer fillers to obtain the micro characteristics of filler particles which are combined with the various characterization results of the bio‐composite to conduct comprehensive research. Based on the micro characteristics of filler particles and thermal conductivity test results, a systematic TGA analysis of the bio‐composite is carried out. Several microscopic models of structure of bio‐composite, which help to visually conduct mechanism research, is established based on various experimental results to concretize the formation process of bio‐composite.