Kev kho cov dej khib nyiab hnyav los ntawm Electroplating Graft Hloov Chitosan ntawm Hluav Taws Xob Hluav Taws Xob

Kev kho cov dej khib nyiab hnyav los ntawm Electroplating Graft Hloov Chitosan ntawm Hluav Taws Xob Hluav Taws Xob

Graft modification yog hais txog grafting ntawm cov pab pawg neeg ua haujlwm (xws li carboxyl, amino, los yog sulfur-muaj pawg) mus rau chitosan lossis cross-linked chitosan molecules, txhawm rau ua kom muaj cov chaw adsorption ntawm chitosan, nthuav dav siv lub plhaub pH, thiab txhim kho adsorption selectivity. Feem ntau cov grafting agents yog crown ether thiab cyclodextrin.

Tan Shuying et al. grafted dibenzo 16-crown-5 chloroacetate crown ether mus rau Schiff puag hom chitosan crown ether CT-15C thiab CT-18C, raws li, los npaj 1,4- Chitosan crown ether CT-15CAC thiab CT-18CAC. Lawv siv CT-15C, CT-18C, 1,4-chitosan crown ether CT-15CAC, 1,4-chitosan crown ether CT{{15} }}CAC rau adsorb Pd2 ntxiv, Ag ntxiv, Pt4 ntxiv, Au3 ntxiv, Cu2 ntxiv, thiab Hg2 ntxiv rau cov hlau hnyav ions Pd2 ntxiv, Ag ntxiv, Pt4 ntxiv, Au3 ntxiv Ob Cu2 ntxiv thiab Hg2 ntxiv muaj kev ua haujlwm zoo adsorption, thiab cov adsorption selectivity ntawm 1,4-chitosan crown ether CT-15CAC thiab 1,4-chitosan crown ether CT-18CAC zoo dua CT-15C thiab CT-18C. Hauv kev sib koom ua ke ntawm Pd2 ntxiv, Cu2 ntxiv, thiab Hg2 ntxiv, muaj qhov tseem ceeb adsorption xaiv rau Pd2 ntxiv. Wang Jintao et al. synthesized vanillin grafted chitosan siv NaBH4 txo microwave hluav taws xob txoj kev thiab siv cov hloov kho chitosan rau adsorption ntawm Ni2 ntxiv, Mn2 ntxiv, thiab Cr6 ntxiv ntawm 25 degree. Cov txiaj ntsig tau pom tias cov chitosan hloov kho tau zoo adsorption kev ua tau zoo rau Ni2 ntxiv, Mn2 ntxiv, thiab Cr6 ntxiv, nrog rau cov nyiaj adsorption ntawm 116.23, 63.83, thiab 47.27 mg / g, feem. Qhov zoo tshaj pH rau cov adsorption ntawm Ni2 ntxiv, Cr6 ntxiv los ntawm kev hloov kho chitosan yog 3, thiab qhov zoo tshaj pH rau Mn2 ntxiv yog 4. Wang li al. synthesized ib tug tshiab grafted chitosan crown ether siv racemic cyclic diamine crown ether ua grafting reagent. Cov pab pawg cyclic diamine hauv chitosan raug tiv thaiv los ntawm cov tshuaj tiv thaiv ntawm benzaldehyde nrog chitosan los ua N-phenylmethylene chitosan (CTB). Cov racemic cyclodiamine crown ether reacts nrog epichlorohydrin los tsim racemic cyclodiamine N-phenylmethylene chitosan (CTAB). Schiff puag yog muab tshem tawm nyob rau hauv ib tug dilute glycolic acid tov kom tau chitosan crown ether (CTDA). Qhov kev sim qhia tau hais tias grafted chitosan crown ether muaj peev xwm xaiv adsorption zoo rau Cu2 ntxiv nyob rau hauv lub xub ntiag ntawm Pb2 ntxiv, Cu2 ntxiv, thiab Cd2 ntxiv ions, thiab nws cov kev xaiv adsorption muaj peev xwm zoo dua li ntawm chitosan.

Ramesh et al. grafted EGDE crosslinked chitosan nrog glycine kom tau cov khoom crosslinked chitosan resin (GMC-CR). Ntawm pH 1-4, GMCCR muaj cov nyhuv adsorption zoo ntawm Au3 ntxiv, Pt4 ntxiv, thiab Pd2 ntxiv. Nalini et al. pom tias muaj peev xwm adsorption ntawm grafted chitosan microspheres (CMCB) thiab chitosan nplooj ntawv (CMCF) rau Cr6 ntxiv rau kev nce ntxiv, thiab ob leeg muaj peev xwm tuav tau siab adsorption peev rau Cr6 ntxiv ntawm cov electrolyte concentrations siab. Vandana Singh et al. grafted chitosan nrog polyacrylamide nyob rau hauv microwave irradiation, ua rau ib tug graft copolymer nrog ntau dua adsorption kev ua tau zoo rau Zn2 ntxiv.

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