摘要
评价了用秸秆粉经磺化及甘氨酸钙取代新工艺得到的拟羧甲基壳聚糖混合物(6-氨基乙酸取代的纤维素、半纤维素、木质素混合产物)吸水及保水性能,对其在室外土壤中的吸水保水性能研究表明:拟羧甲基壳聚糖混合物无论是吸湿率还是保湿率都优于天然壳聚糖原料合成的羧甲基壳聚糖产品;特别是拟羧甲基壳聚糖混合物与纤维素硫酸单酯1∶1复配物具有更好的吸湿效果,其在土壤中的最大饱和吸水量甚至优于聚丙烯酰胺,达到了35.5 g/g,并具有显著提高土壤含水量、有机质、机械稳定的团聚体含量,降低土壤容重的土壤调理作用;这一通过秸秆半合成的拟羧甲基壳聚糖混合物具有原料易得,生产工艺简单,生产成本低,使用性能优异的性价比优势,具有开发潜力。
The water absorption and water retention properties of a mixture of pseudocarboxymethyl chitosan(a mixture of cellulose,hemicellulose and lignin substituted with 6-aminoacetic acid)obtained by sulfonation and calcium glycinate substitution with straw powder were evaluated.The research on its water absorption and water retention performance in outdoor soil shows that the mixture of pseudo-carboxymethyl chitosan is superior to the carboxymethyl chitosan products synthesized from natural chitosan raw materials in terms of moisture absorption rate and moisture retention rate;In particular,the 1∶1 compound of pseudo�carboxymethyl chitosan mixture and cellulose sulfate monoester has better moisture absorption effect,and its maximum saturated water absorption in soil is even better than that of polyacrylamide,reaching 35.5 g/g,and has the soil conditioning effect of significantly increasing soil water content,organic matter content,mechanically stable aggregate content,and reducing soil bulk density.The semi-synthesized pseudo-carboxymethyl chitosan mixture from straw has the advantages of easy availability of raw materials,simple production process,low production cost and excellent performance,and has great potential for development.
作者
胡磊
尹应武
陈思瑞
彭云贵
张文军
杨少梅
HU Lei;YIN Ying-wu;CHEN Si-rui;PENG Yun-gui;ZHANG Wen-jun;YANG Shao-mei(School of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715;School of Chemistry and Chemical Engineering,Xiamen University,Xiamen Fujian 361000;Inner Mongolia Autonomous Region Forestry Research Institute,Hohhot Inner Mongolia 010013;Beijing Ziguang Yingli Chemical Technology Co.,Ltd,Beijing 100085)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2023年第3期104-110,共7页
Soil and Fertilizer Sciences in China
基金
内蒙古自治区科技重大专项zdzx2018060。
关键词
拟羧甲基壳聚糖
羧甲基壳聚糖
聚丙烯酰胺
土壤保水
生物基保水剂
pseudo carboxymethyl chitosan
carboxymethyl chitosan
polyacrylamide
soil water retention
bio-based water retention agent
