1. Chokhuthala chosapangidwa ndi zinthu zachilengedwe
Chogwiritsidwa ntchito kwambiri ndi organic bentonite, chomwe chigawo chake chachikulu ndi montmorillonite. Kapangidwe kake kapadera ka lamellar kakhoza kupatsa chophimbacho pseudoplasticity yamphamvu, thixotropy, kukhazikika kwa kuyimitsidwa ndi mafuta. Mfundo yolimba ndi yakuti ufawo umayamwa madzi ndi kutupa kuti ukhale wolimba, kotero umakhala ndi madzi enaake osungira.
Zoyipa zake ndi izi: kuyenda bwino kwa madzi ndi kusayenda bwino kwa madzi, sizingavute kufalitsa ndi kuwonjezera madzi.
2. Selosi
Chogwiritsidwa ntchito kwambiri ndi hydroxyethyl cellulose (HEC), yomwe ili ndi mphamvu yolimba kwambiri, kuyimitsa bwino, kufalikira komanso kusunga madzi, makamaka polimbitsa gawo la madzi.
Zoyipa zake ndi izi: kukhudza kukana madzi kwa chophimbacho, kusagwira bwino ntchito yolimbana ndi nkhungu, komanso kusagwira bwino ntchito yolinganiza.
3. Akiliriki
Zothina za acrylic nthawi zambiri zimagawidwa m'magulu awiri: zothina za acrylic alkali-swellable thickeners (ASE) ndi zothina za associative alkali-swellable thickeners (HASE).
Mfundo yothira ya acrylic acid alkali-swellable thickener (ASE) ndikulekanitsa carboxylate pamene pH yasinthidwa kukhala alkaline, kotero kuti unyolo wa molekyulu umatambasulidwa kuchoka pa helical kupita ku ndodo kudzera mu isotropic electrostatic repulsion pakati pa ma ayoni a carboxylate, zomwe zimapangitsa kuti kukhuthala kwa gawo lamadzi kukhale bwino. Mtundu uwu wa thickener ulinso ndi mphamvu yothira kwambiri, pseudoplasticity yamphamvu komanso kuyimitsidwa bwino.
Chokhuthala cha alkali chosungunuka (HASE) chimayambitsa magulu osagwirizana ndi madzi pogwiritsa ntchito zokhuthala za alkali zosungunuka (ASE). Mofananamo, pamene pH yasinthidwa kukhala ya alkaline, kugwedezeka kwa electrostatic pakati pa ma ayoni a carboxylate kumapangitsa kuti unyolo wa molekyulu uchokere ku mawonekedwe a helical kupita ku mawonekedwe a ndodo, zomwe zimawonjezera kukhuthala kwa gawo la madzi; ndipo magulu osagwirizana ndi madzi omwe ayambitsidwa pa unyolo waukulu amatha kugwirizana ndi tinthu ta latex kuti tiwonjezere kukhuthala kwa gawo la emulsion.
Zoyipa zake ndi izi: kukhudzidwa ndi pH, kuyenda kosakwanira komanso kusinthasintha kwa utoto, komanso kukhuthala mosavuta pambuyo pake.
4. Polyurethane
Chokhuthala cha polyurethane (HEUR) ndi polima yosungunuka m'madzi ya polyurethane yosinthidwa ndi ethoxylated polyurethane, yomwe ndi ya chokhuthala cha non-ionic associative. Chili ndi magawo atatu: maziko a hydrophobic, unyolo wa hydrophilic ndi maziko a polyurethane. Maziko a polyurethane amakula mu yankho la utoto, ndipo unyolo wa hydrophilic umakhala wokhazikika mu gawo la madzi. Maziko a hydrophobic amagwirizana ndi mapangidwe a hydrophobic monga tinthu ta latex, surfactants, ndi pigments. , kupanga kapangidwe ka netiweki ya magawo atatu, kuti akwaniritse cholinga chokhuthala.
Imadziwika ndi kukhuthala kwa gawo la emulsion, kuyenda bwino kwambiri komanso kusinthasintha, kukhuthala bwino komanso kusungidwa bwino kwa kukhuthala, komanso kusakhala ndi malire a pH; ndipo ili ndi ubwino woonekeratu pakukana madzi, kunyezimira, kuwonekera bwino, ndi zina zotero.
Zoyipa zake ndi izi: mu dongosolo lapakati ndi lotsika la kukhuthala, mphamvu yoletsa kukhazikika kwa ufa si yabwino, ndipo mphamvu yokhuthala imakhudzidwa mosavuta ndi zinthu zosungunulira ndi zosungunulira.
Nthawi yotumizira: Disembala-29-2022