Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum ...Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum and other admixtures happened remarkably during the addition process. So controlling the releasing rate of welan gum will be able to improve the competitive adsorption, while having no disadvantages to its thickening and workability at the same time. The investigation of influences of the delay released welan gum（DRWG） on the fluidity and strength of cement mortar, bleeding rate and rheological properties of cement paste, adsorption amount and zeta potential of clinker single mineralogical phases, shows that there will be a better mortar workability and certain improvement in mortar strength with DRWG. For mortar with DRWG, the standing bleeding rate is 0, and there is less thixotropic, less adsorption, and a lower zeta potential value on the surface of clinker mineralogical phases.展开更多
Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,th...Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,the coencapsulation of hydrophilic L-ascorbate and hydrophobic curcumin was achieved using an organic-free method.The aim of this work was to evaluate the efficacy of chitosan coating loaded with L-ascorbate on the complexation of curcumin with caseinate by investigating their interaction,storage stability and release behavior during simulated digestion.The size andζ-potential of the optimized chitosan-caseinate binary particles at pH 5.0 were 582 nm and 28 mV,respectively.L-ascorbate electrostatically interacted with chitosan and then coated on the caseinate particles where hydrophobic curcumin was encapsulated.The encapsulation efficiency of curcumin and L-ascorbate was 96.2%and 47.6%,respectively.L-ascorbate-loaded chitosan coating significantly improved the storage and irradiation stability of curcumin and inhibited the structural changes of caseinate induced by the loaded curcumin after storage.The antioxidant activity of the co-delivered system was significantly improved compared with either individual system and basically unchanged during irradiation.These results may serve as a helpful guide for future study on the optimization of core-shell particles for the co-delivery of multiple bioactive compounds.展开更多
基金Funded by the National Natural Science Foundation of China(No.51202173)
文摘Welan gum is widely applied in environmental admixtures due to its good thickening and rheological properties. With its powerful charge density in the molecular structure, the competitive adsorption between welan gum and other admixtures happened remarkably during the addition process. So controlling the releasing rate of welan gum will be able to improve the competitive adsorption, while having no disadvantages to its thickening and workability at the same time. The investigation of influences of the delay released welan gum（DRWG） on the fluidity and strength of cement mortar, bleeding rate and rheological properties of cement paste, adsorption amount and zeta potential of clinker single mineralogical phases, shows that there will be a better mortar workability and certain improvement in mortar strength with DRWG. For mortar with DRWG, the standing bleeding rate is 0, and there is less thixotropic, less adsorption, and a lower zeta potential value on the surface of clinker mineralogical phases.
基金the Chinese Scholarship Council(CSC)research program for providing funding for Xin Yin(NO.202106790052).
文摘Co-encapsulation of bioactive compounds with different functionality in a carrier has received considerable attention,while co-encapsulation of bioactives with different solubility remains a challenge.In this study,the coencapsulation of hydrophilic L-ascorbate and hydrophobic curcumin was achieved using an organic-free method.The aim of this work was to evaluate the efficacy of chitosan coating loaded with L-ascorbate on the complexation of curcumin with caseinate by investigating their interaction,storage stability and release behavior during simulated digestion.The size andζ-potential of the optimized chitosan-caseinate binary particles at pH 5.0 were 582 nm and 28 mV,respectively.L-ascorbate electrostatically interacted with chitosan and then coated on the caseinate particles where hydrophobic curcumin was encapsulated.The encapsulation efficiency of curcumin and L-ascorbate was 96.2%and 47.6%,respectively.L-ascorbate-loaded chitosan coating significantly improved the storage and irradiation stability of curcumin and inhibited the structural changes of caseinate induced by the loaded curcumin after storage.The antioxidant activity of the co-delivered system was significantly improved compared with either individual system and basically unchanged during irradiation.These results may serve as a helpful guide for future study on the optimization of core-shell particles for the co-delivery of multiple bioactive compounds.
