摘要
以胡桑枝条木粉为原料制备木质纤维类生物基塑料,木粉先经过球磨预处理后,在二甲亚砜(DMSO)分散介质中,以邻苯二甲酸酐(PA)为改性试剂,4-二甲氨基吡啶(DMAP)为催化剂对其进行酯化改性,并考察了反应温度、时间和试剂用量对改性产物质量增长率及材料力学性能的影响。研究结果表明,以木质纤维为原料,可以成功制备注塑级的生物基塑料,实现木质纤维原料全组分的高效利用。在最佳工艺条件下,经改性制备材料的质量增长率为98.8%,熔融指数0.903 g/min,其拉伸和弯曲强度分别达到24.1和41.9 MPa,具有较好的热塑性和力学性能。
Mulberry branches wood powder was used as the raw material for preparation of bio-based plastic material. After ball milling, wood powder was first esterified by phthalic anhydride (PA) using 4-dimethylaminopyridine (DMAP)as the catalyst in dimethyl sulfoxide (DMSO) as the dispersion medium. The effects of temperature, time and the weight of reagents on weight percent gain( WpG )and mechanical property of modified production were studied. The results showed that esterified lignocellulosic material could be used as bio-based plastic injection molding product with whole components. Under the optimum conditions, the mass growth rate and melt index of the modified product were 98.8% and 0.903 g/min, respectively, and the modified product was found with good thermoplastic and mechanical properties with the tensile strength of 24.1 MPa and the flexural strength of 41.9 MPa.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2015年第6期27-32,共6页
Chemistry and Industry of Forest Products
基金
林业公益性行业科研专项(201204803)
江苏高校优势学科建设工程资助项目(无编号)
关键词
木质纤维类生物质
邻苯二甲酸酐
酯化改性
热塑性
生物基塑料
lignocellulosic biomass
phthalic anhydride
esterifying modification
thermoplastic
bio-based plastic material