摘要
以生物基可降解塑料聚β-羟基丁酸戊酸酯(PHBV)、竹粉(BF)为原料,马来酸酐(MA)为偶联剂、氮化硼(BN)为成核剂,通过共混挤出、注塑成型工艺制得竹粉/PHBV生物复合材料,研究了不同粒径竹粉(40、60、80、100目)对竹粉/PHBV生物复合材料性能(力学性能、热变形温度)的影响。结果表明,随着竹粉粒径从40目增加到100目,复合材料的拉伸模量、拉伸强度、弯曲模量、弯曲强度、缺口冲击强度、热变形温度呈逐渐减小的趋势;断裂伸长率和无缺口冲击强度呈逐渐提高的趋势。竹粉/PHBV复合材料断面电镜扫描发现,随着竹粉目数的增加,竹粉在PHBV基体中的形态差异较大,40目竹粉表面粗糙度较大,有些较大的竹粉分裂出若干纤维束,与PHBV界面形成了较强的机械互锁。
BF/PHBV biocomposites were prepared by bio-surfactant degradable plastics poly（hydroxybutyrate-co-valerate）（PHBV）,bamboo flour,with coupling agent of maleic anhydride（MA）,nucleating agent of boron nitride（BN）.Fabrication of the biocomposites was carried out by injection molding following extrusion com-pounding.Effects of different bamboo flour sizes（from 40 to 100 mesh） on properties（mechanical properties,heat distortion temperature（HDT）） of the composites were studied.Results showed that tensile modulus,tensile strength,flexural modulus,flexural strength and notched impact strength and HDT decreased with the increase of sizes from 40 to 100 mesh.Non-notched impact strength and breaking elongation showed an increasing tendency.Moreover,morphology had been studied by SEM.
出处
《浙江林业科技》
北大核心
2011年第4期16-20,共5页
Journal of Zhejiang Forestry Science and Technology
基金
浙江省重大科技专项(优先主题)农业项目(2008C12086)
关键词
竹粉
粒径
聚β-羟基丁酸戊酸酯
力学性能
热变形温度
bamboo flour
particle size
poly hydroxybutyrate-co-hydroxyvalerate
mechanical property
heat distortion temperature
