食品科学2024，Vol.45Issue(24)：17-25,9.DOI:10.7506/spkx1002-6630-20240206-046
糖用松香基脱色树脂吸附焦糖色素相互作用微观机制
Microscopic Mechanism of the Interaction in the Adsorption of Caramel Pigments onto Rosin-Based Decolorizing Resin for Sugar
摘要
Abstract
Decolorization of remelt syrup is the most critical step in sugar refining.Currently,benzene-based anion-adsorption resins are commonly used in remelt syrup decolorization,but their slow release of monomers may endanger food safety.In this study,a green and environmentally friendly rosin-derived macroporous anion-adsorbing resin was synthesized and used to efficiently capture the caramels in remelt syrup.The results showed that the equilibrium adsorption capacity of the resin for caramels was 86 mg/g,and the corresponding decolorization efficiency was as high as 90%.Following five cycles of repeated use,the decolorization efficiency decreased by only 5%,indicating excellent reusability.The focus was on the multidimensional visualization of the micro-mechanism of the interaction in the adsorption of caramels by the rosin-based resin at the molecular,atomic,and electronic levels on the basis of quantum chemical theoretical calculations(including electrostatic potential,electrostatic potential interaction,average local ionization energy,frontier molecular orbitals,independent gradient model,and Hirshfeld surface analyses).The results indicated that the adsorption occurred with positive-negative potential neutralization and interpenetration.The interaction mechanism was primarily mediated by the electrophilic reaction between carboxylate and protonated tertiary amine groups,followed by weak hydrogen bonding,with the resin acting as a hydrogen bond donor.The combined use of multiple quantum chemical theory calculations to visualize the micro-mechanism of the adsorption interaction can provide novel insights into exploring the adsorption behavior and mechanism at a deeper level,which has a theoretical contribution and practical value.关键词
食糖/色素/机制/回溶糖浆/量子化学理论计算Key words
sugar/pigments/mechanism/remelt syrup/quantum chemical theoretical calculations分类
轻工纺织引用本文复制引用
韦艳红,王佳欣,焦丽,廖春玉,雷福厚,李文..糖用松香基脱色树脂吸附焦糖色素相互作用微观机制[J].食品科学,2024,45(24):17-25,9.基金项目
国家自然科学基金青年科学基金项目(32001741) （32001741）
广西创新驱动发展专项资金项目(桂科AA22117014-4) （桂科AA22117014-4）
广西自然科学基金青年科学基金项目(2021GXNSFBA076002) （2021GXNSFBA076002）
