西安工程大学学报2025，Vol.39Issue(5)：39-47,9.DOI:10.13338/j.issn.1674-649x.2025.05.005
单宁酸缓释凝胶球保水抗碱性能
Water-retention and alkali-resistance properties of tannic acid-based sustained-release gel beads
摘要
Abstract
To address the synergistic remediation challenges of soil water loss,salinization,and heavy metal pollution,this study proposes the construction of constructed sodium alginate/tannic acid@biochar composite gel microspheres(SA/TA@BC)using microfluidic droplet-forming technology,with a focus on investigating their water retention and alkali resistance.When the mass ratio of sodium hydroxide to preactivated biochar reached 1:1,the tannic acid(TA)loading capacity was maximized.Infrared microthermal imaging confirmed successful encapsulation of TA and biochar within the gel microspheres,which demonstrated excellent antiswelling capacity after freeze-drying.The low-temperature vacuum-drying process endowed the gel microspheres with i-deal sustained-release properties at pH 10,with TA release maintained after 96 hours.Soil simula-tion experiments showed that at 5%additive dose,the soil water retention water-retention rate increased by 27.7%after 72 h,while and pH values were dynamically regulated from 8.0 to 6.5-7.0,and achieved while achieving a Cu2+adsorption capacity of 4.2 mg/g.This multifunc-tional material functions through a triple synergistic mechanism involving TA sustained release,biochar pore confinement,and SA 3D network coordination,offering a novel strategy for develo-ping composite soil remediation agents.关键词
土壤改良剂/海藻酸钠/单宁酸/生物炭/复合凝胶球/保水抗碱性Key words
soil conditioner/sodium alginate(SA)/tannic acid/biochar(TA)/composite gel bead(BC)/water retention and alkali resistance water-retention and alkali-resistance properties分类
化学化工引用本文复制引用
王新苗,王星星,张珈铭,王毅博..单宁酸缓释凝胶球保水抗碱性能[J].西安工程大学学报,2025,39(5):39-47,9.基金项目
陕西基础科学(化学、生物学)研究院基础科学研究计划项目(23JHQ005) （化学、生物学）
西安工程大学博士科研启动基金(107020407) （107020407）
西安市科技局高校院所人才服务企业项目(2023JU-GXRC-0067) （2023JU-GXRC-0067）
