Lub cev qauv ntawm ion txauv resin
Ionic resins feem ntau muab faib ua ob pawg: hom gel thiab hom pore loj.
Lub cev pob txha polymer ntawm gel hom resin uas tsis muaj qhov pores hauv qhov qhuav. Nws nthuav dav thaum nws nqus dej, tsim cov pores zoo heev ntawm cov saw hlau macromolecular, feem ntau hu ua micro-pore. Qhov nruab nrab qhov pore loj ntawm cov ntaub ntub dej yog 2 ~ 4nm (2 × 10-6 ~ 4 × 10-6mm).
Hom resin no zoo dua rau adsorption ntawm inorganic ions, lawv txoj kab uas hla yog me me, feem ntau yog {{0}}.3 ~ 0.6nm. Cov resin no tsis tuaj yeem adsorb loj molecular organic tshuaj, vim hais tias tom kawg yog loj, xws li protein molecules nrog ib txoj kab uas hla ntawm 5 ~ 20nm, tsis tuaj yeem nkag mus rau hauv microscopic pores ntawm hom resin no.
Macroporous resin yog tsim los ntawm kev ntxiv cov pore-ua tus neeg sawv cev thaum lub sij hawm polymerization los tsim ib lub cev porous cavernous skeleton nrog ib tug loj tus naj npawb ntawm mus tas li micropores nyob rau hauv thiab tom qab ntawd qhia kev sib pauv pab pawg. Nws muaj ob qho tib si micro-pores thiab macro-pore, thiab qhov pore loj ntawm cov ntaub ntub dej tuaj yeem yog 100 ~ 500nm, thiab nws qhov loj thiab ntau tuaj yeem tswj tau thaum lub sijhawm tsim khoom. Qhov chaw ntawm qhov pore tuaj yeem nce mus rau ntau dua 1000m2 / g. Qhov no tsis tsuas yog muab cov kev sib cuag zoo rau kev sib pauv ion, luv luv ntawm qhov kev ncua deb ntawm ion diffusion, tab sis kuj nce ntau cov chaw ua haujlwm, thiab ua rau molecular adsorption los ntawm intermolecular van de Waal lub zog, uas muaj peev xwm adsorb ntau yam tsis-ionic tshuaj xws li activated carbon thiab nthuav nws txoj haujlwm. Qee cov macroporous resins uas tsis muaj kev sib pauv ua haujlwm pab pawg kuj tuaj yeem adsorb thiab cais ntau yam tshuaj, xws li phenols hauv cov nroj tsuag cov dej khib nyiab.
Cov pores nyob rau hauv cov macroporous resin muaj ntau thiab loj, qhov chaw saum npoo yog loj, lub active centre yog ntau, lub ion diffusion tus nqi yog ceev, lub ion pauv tus nqi kuj sai npaum li cas, li kaum zaus sai tshaj li gel hom resin. Thaum siv, kev ua haujlwm ceev ceev, kev ua haujlwm siab, thiab lub sijhawm ua haujlwm yuav tsum tau luv. Macroporous resin kuj muaj ntau yam zoo: o tuaj yeem tiv taus, tsis yooj yim rau tawg, oxidation tsis kam, hnav tsis kam, kub tsis kam thiab kub hloov tsis kam, thiab yooj yim adsorption thiab pauv cov organic macromolecular tshuaj, yog li muaj zog ua paug, thiab yooj yim rau regenerate.
