木粉丁二酰化改性制备生物基塑料

The Preparation of Bio-based Plasticsby Succinic Anhydride Esterifying Modification of Wood Powder

[目的]制备出具有较好力学性能的注塑级生物基塑料。[方法]以胡桑枝条木粉为原料,经球磨预处理后,于二甲亚砜-四乙基氯化铵复合溶剂体系中部分溶解后,以丁二酸酐为酯化试剂,对二甲氨基吡啶为催化剂,进行酯化改性,制备出具有较好力学性能的注塑级生物基塑料。[结果]通过试验对比,得出最好的试验参数为:当木粉原料与丁二酸酐的质量比为1∶1,在60℃下溶解1 h后再反应1 h。在此条件下改性产物的增重率为103.7%,可以达到最优的力学性能,其拉伸强度和弯曲强度分别能达到33.4和41.9 MPa,已经达到一般塑料的力学性能。[结论]研究可为木质纤维类生物质全组分综合高值利用提供参考。

[Objective]To prepare injection gradebio-based plasticswith better mechanical properties. [Method]Mulberry branches wood powder as the raw material,after ball mill pretreatment,was partly dissolved in DMSO（ Dimethyl sulfoxide） / TEAC（ Tetraethyl ammonium chloride） solvent system,then modified with SAA（ Succinic anhydride） as esterifying reagent and DMAP（ Dimethyl aminopyridine） as catalyst. The injection molding grade bio-based plastics with good mechanical properties was successfully prepared. [Result]Through the experimental comparison,when the wood powder and SAA withmass-ratio of 1∶1 reacted in 1h under 60 ℃ in DMSO / TEAC solvent system,which wood powder was dissolved in 1h under 60 ℃,the weight gain rate of modified productis 103. 7%,the mechanical properties reached the best： the tensile strength of modified productis 33. 4 MPa and the flexural strength is 41. 9 MPa,similar to common plastics. [Conclusion] The study can provide reference for comprehensive utilization of wood fiber biomass all components.