木材科学与技术2024，Vol.38Issue(3)：56-63,77,9.DOI:10.12326/j.2096-9694.2024021
密度对稻壳/聚氯乙烯发泡复合材料尺寸稳定性及力学性能的影响
Effect of Density on the Dimensional Stability and Mechanical Properties of Rice Husk/Polyvinyl Chloride Foamed Composite Materials
摘要
Abstract
This study investigated the effect of density variations on the performance of rice husk/polyvinyl chloride(PVC)foamed composite materials(RHPC)to address the challenges of high density and poor dimensional stability in traditional un-foamed wood plastic composites(WPCs).Three distinct densities of RHPC were fabricated using rice husk and PVC.The results revealed that as the foaming degree increases,the density and the uniformity of the cell pores decrease respectively.Notably,the coefficient of linear thermal expansion(CLTE)and water absorption expansion rate of the RHPC progressively increased from RHPC-Ⅰ to RHPC-Ⅲ,exhibiting anisotropy in dimensional changes across length,width,and thickness directions.Further analysis indicated that humidity exerted a greater effect on the dimensional stability of RHPC than the temperature.Additionally,a decrement in the bending strength,bending modulus,and creep resistance was observed from RHPC-Ⅰ to RHPC-Ⅲ.However,RHPC-Ⅱ exhibited the highest impact strength of 14.3 kJ/m2 and specific impact strength of 19.9(kJ·m-2)/(g·cm-3),which was attributed to its uniform cell structure.This research provides valuable insights for developing lightweight-high-strength WPCs and expanding its potential applications.关键词
稻壳/聚氯乙烯发泡复合材料/发泡/力学性能/尺寸稳定性/蠕变Key words
rice husk/polyvinyl chloride foamed composites(RHPC)/foaming/mechanical properties/dimensional stability/creep分类
轻工纺织引用本文复制引用
邢志栋,徐俊杰,欧荣贤,黄剑飞,易欣,郝笑龙..密度对稻壳/聚氯乙烯发泡复合材料尺寸稳定性及力学性能的影响[J].木材科学与技术,2024,38(3):56-63,77,9.基金项目
广东省自然科学基金面上项目"超高木质纤维含量木塑复合材料非热力学界面作用机制"(2023A1515012640) （2023A1515012640）
广州市基础与应用基础研究专题项目"基于类相反转的超高填充木塑复合材料界面流变耦合机制"(2024A04J3819). （2024A04J3819）
