1. Cov khoom ua kom tuab tsis muaj zog
Feem ntau siv yog organic bentonite, uas nws cov khoom tseem ceeb yog montmorillonite. Nws cov qauv tshwj xeeb lamellar tuaj yeem muab cov txheej nrog pseudoplasticity muaj zog, thixotropy, kev ncua kev ruaj khov thiab lubricity. Lub hauv paus ntsiab lus ntawm thickening yog tias cov hmoov nqus dej thiab swells kom thicken cov dej theem, yog li nws muaj qee qhov kev khaws cia dej.
Qhov tsis zoo yog: kev ntws tsis zoo thiab kev ua haujlwm tsis zoo, tsis yooj yim rau kev tawg thiab ntxiv.
2. Cellulose
Feem ntau siv yog hydroxyethyl cellulose (HEC), uas muaj kev ua haujlwm siab thickening, zoo suspension, dispersion thiab dej retention zog, feem ntau yog rau thickening cov dej theem.
Qhov tsis zoo yog: cuam tshuam rau qhov tsis kam dej ntawm lub txheej, tsis txaus tiv thaiv pwm, thiab kev ua haujlwm tsis zoo.
3. Acrylic
Cov khoom siv acrylic thickeners feem ntau muab faib ua ob hom: acrylic alkali-swellable thickeners (ASE) thiab associative alkali-swellable thickeners (HASE).
Lub hauv paus ntsiab lus ntawm acrylic acid alkali-swellable thickener (ASE) yog dissociate cov carboxylate thaum pH raug kho rau alkaline, yog li ntawd cov saw hlau molecular txuas ntxiv los ntawm lub helical mus rau ib tug pas nrig los ntawm isotropic electrostatic repulsion ntawm carboxylate ions, txhim kho lub viscosity ntawm cov dej theem. Hom thickener no kuj muaj kev ua haujlwm thickening siab, muaj zog pseudoplasticity thiab zoo suspension.
Cov tshuaj nplaum uas ua rau alkali-swellable thickener (HASE) tsim cov pab pawg hydrophobic raws li cov tshuaj nplaum alkali-swellable (ASE). Ib yam li ntawd, thaum pH raug kho kom alkaline, qhov electrostatic repulsion ntawm cov carboxylate ions ua rau cov saw molecular txuas ntxiv los ntawm lub helical zoo li mus rau lub pas nrig zoo li, uas ua rau cov dej viscosity ntau ntxiv; thiab cov pab pawg hydrophobic uas tau tsim rau ntawm cov saw tseem ceeb tuaj yeem koom nrog cov khoom latex kom ua rau cov emulsion zoo dua.
Qhov tsis zoo yog: rhiab heev rau pH, tsis txaus ntws thiab qib ntawm cov xim pleev xim, yooj yim kom tuab tom qab.
4. Polyurethane
Polyurethane associative thickener (HEUR) yog ib qho hydrophobically hloov kho ethoxylated polyurethane dej-soluble polymer, uas yog ib feem ntawm non-ionic associative thickener. Nws muaj peb ntu: hydrophobic puag, hydrophilic saw thiab polyurethane puag. Lub hauv paus polyurethane nthuav dav hauv cov xim pleev xim, thiab cov saw hydrophilic ruaj khov hauv theem dej. Lub hauv paus hydrophobic koom nrog cov qauv hydrophobic xws li cov khoom latex, surfactants, thiab pigments., tsim cov qauv network peb-seem, yog li ua tiav lub hom phiaj ntawm thickening.
Nws yog tus cwj pwm los ntawm qhov tuab ntawm theem emulsion, kev ntws zoo heev thiab kev ua tau zoo, kev ua haujlwm zoo thickening thiab kev khaws cia viscosity ruaj khov dua, thiab tsis muaj pH txwv; thiab nws muaj qhov zoo pom tseeb hauv kev tiv thaiv dej, gloss, pob tshab, thiab lwm yam.
Qhov tsis zoo yog: nyob rau hauv lub nruab nrab thiab qis viscosity system, qhov cuam tshuam tiv thaiv kev tawg ntawm cov hmoov tsis zoo, thiab qhov cuam tshuam thickening yooj yim cuam tshuam los ntawm dispersants thiab cov kuab tshuaj.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-29-2022