球磨麦草苄基化改性自增强材料的研究  

Preparation of self-reinforced composites from ball-milled wheat straw by benzylation

作　　者：叶菊娣[1] 虞霁 李小保[1] 翟姝瑾 苏萌[1] 严伟[1] 洪建国[1] 

机构地区：[1]南京林业大学化工学院,江苏南京210037

出　　处：《现代化工》2014年第3期93-96,共4页Modern Chemical Industry

基　　金：国家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

摘　　要：探索了麦草球磨预处理对苄基化改性的影响,并与NaOH溶液预处理进行了对比。球磨预处理可以显著提高麦草反应的可及度和苄基化效率,原料利用率高。还研究了增重率与材料的热塑性以及拉伸强度和弯曲强度的关系,发现随着增重率增加,即麦草苄基化反应程度提高,产物的热塑性越好,但材料的拉伸强度和弯曲强度增加到一定程度后,反而随着增重率的增加而下降。研究表明,控制苄基化改性程度,保留适量的未改性或改性不完全的纤维或微纤丝,作为自增强材料可以提高材料的力学性能。所制备的自增强复合材料的拉伸强度和弯曲强度最高分别达22.5 MPa和33.6 MPa。The influence of ball mill pretreatment on benzylation is studied and compared with the NaOH solution pretreatment.Ball mill pretreatment can improve the reactive ability of wheat straw and the efficiency of benzylation.The wheat straw is used completely.The relationship of the weight gain rate to the thermoplasticity,tensile strength and flexural strength is investigated.The thermoplasticity increases when the weight gain rate of benzylation increases,but the tensile strength and flexural strength are increased at first and then decreased when the weight gain rate of benzylation wheat straw increases.The results show that remaining some fiber or micro fibrillated cellulose by controlling benzylation degree as self-reinforced material can increase the mechanical property of composites.The tensile strength and flexural strength of self-reinforced composites can achieve 22.5 MPa and 33.6 MPa.

关 键 词：麦草 球磨预处理 苄基化 增重率 自增强材料 

分 类 号：TQ352.4[化学工程] X712[环境科学与工程—环境工程]