Feem ntau muaj ob hom kev kho dej resins: ion exchange resin thiab chelating resin. Cov qauv ntawm cov ion txauv resin feem ntau muab faib ua ob hom: macroporous hom thiab hom gel. Ob hom qauv sib txawv kuj muaj qee qhov sib txawv ntawm adsorption thiab kev ua haujlwm. Hauv qab no yog cov lus qhia ntxaws ntxaws txog cov yam ntxwv thiab qhov sib txawv ntawm hom gel thiab hom macroporous ntawm ion txauv resin.
Ionic resins feem ntau muab faib ua ob hom: gel hom thiab macroporous hom:
Cov pob txha polymer ntawm gel-hom resin tsis muaj qhov pores sab hauv thaum qhuav. Nws swells thaum nws nqus dej, tsim cov pores zoo heev ntawm kev sib txuas macromolecule, feem ntau hu ua micropores. Qhov nruab nrab pore txoj kab uas hla ntawm cov ntaub ntub dej yog 2 ~ 4nm (2 × 10-6 ~ 4 × 10-6mm).
Hom resin no zoo dua rau adsorbing inorganic ions, thiab lawv txoj kab uas hla me me, feem ntau yog {{0}}.3 ~ 0.6nm. Hom resin no tsis tuaj yeem adsorb macromolecular organic tshuaj vim tias tom kawg yog qhov loj dua. Piv txwv li, cov protein molecules muaj ib txoj kab uas hla ntawm 5 mus rau 20 nm thiab tsis tuaj yeem nkag mus rau hauv microscopic pores ntawm hom resin no.
Macroporous resin yog tsim los ntawm kev ntxiv cov porogen thaum lub sij hawm polymerization cov tshuaj tiv thaiv los tsim ib tug ntxeem tau daim txhuam cev zoo li cov qauv nrog ib tug loj tus naj npawb ntawm mus tas li micropores nyob rau hauv, thiab ces qhia kev sib pauv pab pawg. Nws muaj ob qho tib si micropores thiab macro-pores, thiab lub pore txoj kab uas hla ntawm wetted resin yog 100 txog 500nm. Nws qhov loj me thiab tus lej tuaj yeem tswj tau thaum tsim khoom. Qhov chaw saum npoo ntawm cov channel tuaj yeem nce mus rau ntau dua 1000m2 / g. Xiav zaj duab xis dej kho thiab ua tiav tsis yog tsuas yog muab kev sib cuag zoo rau kev sib pauv ion, ua kom luv ion diffusion nrug, tab sis kuj ntxiv ntau cov saw txuas cov chaw ua haujlwm, uas tsim cov molecular adsorption los ntawm van der Waals quab yuam ntawm cov molecules, thiab tuaj yeem ua tau zoo li cov pa roj carbon activated. Nyob rau hauv txoj kev no, nws tuaj yeem nqus tau ntau yam uas tsis yog-ionic 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 sab hauv ntawm macroporous resin muaj ntau thiab loj, thaj chaw saum npoo yog loj, muaj ntau lub chaw ua haujlwm, ion diffusion ceev ceev, thiab cov ion pauv ceev kuj nrawm dua, li kaum zaus sai dua li gel-hom resin. Nws yog nrawm thiab ua haujlwm tau zoo thaum siv, thiab lub sijhawm ua haujlwm yuav tsum tau luv. Macroporous resin kuj muaj ntau yam zoo: tsis kam o, tsis yooj yim rau tawg, tsis kam oxidation, hnav tsis kam, kub tsis kam thiab kub hloov tsis kam, thiab yooj yim adsorption thiab pauv cov organic macromolecules, yog li nws muaj zog tiv taus cov pa phem thiab kuj yooj yim. rov tsim dua tshiab.
