In this work, a novel hollow fiber membrane extractor was set up to extract inorganic anions from ethyl acetate using deionized water. Inorganic anions in slightly soluble organic solvents can be determined by the in-...In this work, a novel hollow fiber membrane extractor was set up to extract inorganic anions from ethyl acetate using deionized water. Inorganic anions in slightly soluble organic solvents can be determined by the in-line hollow fiber membrane extractor coupled with ion chromatography at first time. Different aspects of the extraction procedure such as magnetic stirring speed, extraction flow rate and extraction time were optimized to achieve high extraction efficiency and good separation results. Satisfactory linear range, limits of detection and good repeatability were obtained. The procedure was applied to analyze inorganic anions in two commercial ethyl acetate samples.展开更多
A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liqu...A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liquid membrane was impregnated with different concentrations carrier.The experimental variables explored were concentration of yttrium(Ⅲ) ions,pH of source phase,PC-88A concentration in membrane phase,acid concentration in receiving phase and stirring speed.The pre-concentration of yttrium(Ⅲ) ions ...展开更多
Extraction and interfacial kinetics of Nd 3+ and Sm 3+ with HEH/EHP kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane e...Extraction and interfacial kinetics of Nd 3+ and Sm 3+ with HEH/EHP kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane extractor are the same as those in the liquid liquid extraction, which can be expressed as a quasi first order reaction. The effect of acidity in aqueous phase, concentrations of extractant, Nd 3+ and Sm 3+ on extraction rate were discussed and the corresponding reaction series were obtained. The reaction equations, reaction rate constants and the separation constant were obtained.展开更多
The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-fr...The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-free cellulose fibers from the bast of Broussonetia papyrifera(pa-per mulberry),a fast-growing plant that does not require pesticides.The fibers were extracted using a mild alkaline treatment that preserved their alignment and allowed them to be knitted di-rectly without traditional spinning.A coating of suberin,obtained from cork bark waste(Quercus variabilis),was applied using ethanol dispersion and fixed by heating at 110℃.The coating im-proved the fiber’s antibacterial performance,moisture response,and mechanical strength(tensile strength:0.43 GPa;Young’s modulus:6.4 GPa),while keeping the material flexible and washable.The suberin layer could be removed and reused through a recycling process involving ionic liq-uids,allowing over 95%recovery after multiple cycles.A life cycle assessment showed that this fiber system had a lower environmental impact compared to conventional synthetic textile fibers.Overall,this work provided a practical and recyclable approach to making functional textiles from natural plant materials.展开更多
基金supported by National Natural Science Foundation of China(No.20775070)by Zhejiang Provincial Natural Science Foundation of China(No.R4080124)Zhejiang Qianjiang Project of Science and Technology for Competent People(No.2008R10028).
文摘In this work, a novel hollow fiber membrane extractor was set up to extract inorganic anions from ethyl acetate using deionized water. Inorganic anions in slightly soluble organic solvents can be determined by the in-line hollow fiber membrane extractor coupled with ion chromatography at first time. Different aspects of the extraction procedure such as magnetic stirring speed, extraction flow rate and extraction time were optimized to achieve high extraction efficiency and good separation results. Satisfactory linear range, limits of detection and good repeatability were obtained. The procedure was applied to analyze inorganic anions in two commercial ethyl acetate samples.
基金supported by Department of Science and Technology,Government of India (GAP 271526)
文摘A novel idea of transport of yttrium(Ⅲ) metal ions through fibers supported liquid membrane in two stage processes namely source to membrane and membrane to receiving phase has been proposed.The fibers supported liquid membrane was impregnated with different concentrations carrier.The experimental variables explored were concentration of yttrium(Ⅲ) ions,pH of source phase,PC-88A concentration in membrane phase,acid concentration in receiving phase and stirring speed.The pre-concentration of yttrium(Ⅲ) ions ...
文摘Extraction and interfacial kinetics of Nd 3+ and Sm 3+ with HEH/EHP kerosene in a hollow fiber membrane extractor were studied. The results show that the extraction reactions in the hollow fiber membrane extractor are the same as those in the liquid liquid extraction, which can be expressed as a quasi first order reaction. The effect of acidity in aqueous phase, concentrations of extractant, Nd 3+ and Sm 3+ on extraction rate were discussed and the corresponding reaction series were obtained. The reaction equations, reaction rate constants and the separation constant were obtained.
基金supported by the China Association for Science and Technology Youth Talent Support Engineering Doctoral Program,the China Scholarship Council(CSC),the Fundamental Research Funds for the Central Universities(No.2572024AW49)the Science and Technology Extension Project of the State Forestry Administration of China(No.070-41319503).
文摘The development of yarn-free cellulose fibers from natural biomass provides a low-energy and environmentally conscious alternative for producing functional textiles.This study introduced a method for producing yarn-free cellulose fibers from the bast of Broussonetia papyrifera(pa-per mulberry),a fast-growing plant that does not require pesticides.The fibers were extracted using a mild alkaline treatment that preserved their alignment and allowed them to be knitted di-rectly without traditional spinning.A coating of suberin,obtained from cork bark waste(Quercus variabilis),was applied using ethanol dispersion and fixed by heating at 110℃.The coating im-proved the fiber’s antibacterial performance,moisture response,and mechanical strength(tensile strength:0.43 GPa;Young’s modulus:6.4 GPa),while keeping the material flexible and washable.The suberin layer could be removed and reused through a recycling process involving ionic liq-uids,allowing over 95%recovery after multiple cycles.A life cycle assessment showed that this fiber system had a lower environmental impact compared to conventional synthetic textile fibers.Overall,this work provided a practical and recyclable approach to making functional textiles from natural plant materials.
