林产化学与工业2025，Vol.45Issue(5)：105-110,6.DOI:10.20195/j.issn.0253-2417.2024178
杜仲胶高效提取过程及其动力学和热力学研究
Kinetics and Thermodynamics of the Efficient Extraction Process of Eucommia ulmoides Gum
摘要
Abstract
Using Eucommia ulmoides Oliv.pericarp as raw material,this study investigated the effects of a combined pretreatment method involving pre-impregnation and mechanical crushing on the extraction of E.ulmoides gum(EUG).The kinetic and thermodynamic parameters of the EUG extraction process after pretreatment were calculated,and the extraction efficiencies of water(H2O)and promoter(KH2PO4,50 g/L)pre-impregnation systems were compared.The results demonstrated that the combination of pre-impregnation and mechanical crushing significantly improved the EUG extraction yield.When KH2PO4 was used for pre-impregnation and extraction was conducted at 353 K for 50 min,the yield reached 17.91％.Within the temperature range of 323-353 K,the rate constant increased in the accelerator system compared to the pure water system,with the maximum yield improvement being 2.66％.The EUG extraction process followed first-order kinetics model(R2＞0.98),with activation energies(Ea)of 8.31 and 7.19 kJ/mol for the water and promoter systems,respectively.Thermodynamic analysis revealed that the enthalpy changes(△H)were 112.25 and 94.92 kJ/mol,the entropy changes(△S)were 369.06 and 324.33 J/(mol·K),and the Gibbs free energy changes(△G)ranged from-6.96 to-18.03 kJ/mol and-9.84 to-19.57 kJ/mol for the water and promoter systems,respectively.These results indicated that the extraction process was spontaneous,endothermic,and entropy-driven.Both kinetic and thermodynamic analyses suggested that EUG extraction was more efficient after pre-impregnation in the promoter system.关键词
杜仲胶提取/预浸渍处理/机械粉碎/动力学/热力学Key words
Eucommia ulmoides gum extraction/pre-impregnation treatment/mechanical crushing/kinetics/thermodynamics分类
化学化工引用本文复制引用
任顺强,王司晨,侯世航,张继川,樊永明..杜仲胶高效提取过程及其动力学和热力学研究[J].林产化学与工业,2025,45(5):105-110,6.基金项目
国家自然科学基金资助项目(52273051) （52273051）
