玉米淀粉氧化及其接枝制备黄土抑尘剂的研究  

Investigation on oxidation of corn starch and its grafting for the preparation of loess dust suppressants

作　　者：肖军 高慧 张志明 宋永刚 李康 XIAO Jun;GAO Hui;ZHANG Zhi-min;SONG Yong-gang;LI Kang(Gansu Third Construction Group Co.Ltd.,Lanzhou 730030,China;School of Materials Science and Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]甘肃第三建设集团有限公司,甘肃兰州730030 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2023年第6期22-27,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省住房和城市建设厅项目(JKR2022-55)。

摘　　要：以玉米淀粉为原料,通过设计正交实验,采用催化氧化湿法研究了pH值、过氧化氢、硫酸铜、温度和时间对玉米淀粉的催化氧化效果,制备出活化的氧化淀粉,采用丙烯酸对氧化淀粉接枝改性,制备了绿色环保型黄土固化抑尘剂.结果表明:pH=9、过氧化氢用量8 mL、硫酸铜用量为淀粉干基的0.01%、温度65℃、时间2 h时,玉米淀粉的部分羟基被氧化成羧基,羧基含量达到0.371%,达到良好的氧化效果.扫描电子显微镜分析结果表明:氧化反应主要发生在淀粉表面.用氧化程度最佳的淀粉作基料,把丙烯酸单体接枝在氧化玉米淀粉上,合成了一种新的绿色环保型固尘剂.喷洒后黄土表层硬度达71.4 HA,具有良好的黄土固化抑尘效果.Using corn starch as raw material,the catalytic oxidation wet method was used to study the catalytic oxidation effect of pH,hydrogen peroxide,copper sulfate,temperature and time on corn starch by designing orthogonal experiments,and activated oxidized starch was prepared,the green environmentally loess curing dust suppressant was prepared by using acrylic acid grafting modification of oxidized starch.The results showed that part of the hydroxyl group of the corn starch is oxidized into carboxyl group,and the carboxyl content of the oxidized arrowhead starch is 0.371%,at pH=9,8 mL of H 2O 2,the CuSO 4 in 0.04%of the dry basis,and 2 hours of the reaction time at 65℃,which show good oxidation effect is achieved.The results of scanning electron microscope analysis showed that the oxidation reaction is mainly occurred on the surface of starch.Using the starch with the best oxidation degree as the base material,a new green and environmentally dust fixing agent is synthesized by grafting the acrylic monomer on the oxidized corn starch.And the hardness of the top layer of loess reach 71.4 HA after spraying,which has a very good effect of loess curing and dust suppression.

关 键 词：玉米淀粉 氧化淀粉 羧基含量 固尘剂 

分 类 号：TQ317[化学工程—高聚物工业]