1. Inorganic thickener
Ohun ti o wọpọ julọ ni bentonite Organic, eyiti paati akọkọ rẹ jẹ montmorillonite. Ilana pataki lamellar rẹ le fun ibora pẹlu pseudoplasticity ti o lagbara, thixotropy, iduroṣinṣin idadoro ati lubricity. Ilana ti o nipọn ni pe lulú n gba omi ati ki o swells lati nipọn ipele omi, nitorina o ni idaduro omi kan.
Awọn aila-nfani ni: sisan ti ko dara ati iṣẹ ipele, ko rọrun lati tuka ati ṣafikun.
2. Cellulose
Ohun ti o wọpọ julọ jẹ hydroxyethyl cellulose (HEC), eyi ti o ni ṣiṣe ti o nipọn to gaju, idaduro to dara, pipinka ati awọn ohun-ini idaduro omi, nipataki fun fifun ipele omi.
Awọn aila-nfani naa jẹ: ni ipa lori resistance omi ti ibora, aipe iṣẹ-egbogi-m, ati iṣẹ ipele ti ko dara.
3. Akiriliki
Akiriliki thickeners ti wa ni gbogbo pin si meji orisi: akiriliki alkali-swellable thickeners (ASE) ati associative alkali-swellable thickeners (HASE).
Ilana ti o nipọn ti akiriliki acid alkali-swellable thickener (ASE) ni lati pin awọn carboxylate nigbati pH ti wa ni titunse si ipilẹ, ki awọn molikula pq ti wa ni tesiwaju lati kan helical to a ọpá nipasẹ awọn isotropic electrostatic repulsion laarin carboxylate ions, imudarasi The viscosity ti awọn olomi alakoso. Iru ti o nipọn tun ni ṣiṣe ti o nipọn giga, pseudoplasticity ti o lagbara ati idaduro to dara.
Asopọmọra alkali-swellable thickener (HASE) ṣafihan awọn ẹgbẹ hydrophobic lori ipilẹ ti awọn ohun elo ti o nipọn alkali-swellable (ASE). Bakanna, nigbati pH ti wa ni titunse lati ipilẹ, awọn kanna-ibalopo electrostatic repulsion laarin carboxylate ions mu ki Awọn molikula pq pan lati a helical apẹrẹ si a ọpá apẹrẹ, eyi ti o mu ki awọn iki ti awọn omi ipele; ati awọn ẹgbẹ hydrophobic ti a ṣe lori pq akọkọ le ṣepọ pẹlu awọn patikulu latex lati mu iki ti ipele emulsion pọ si.
Awọn alailanfani jẹ: ifarabalẹ si pH, ṣiṣan ti ko to ati ipele ti fiimu kikun, rọrun lati nipọn lẹhin.
4. Polyurethane
Polyurethane associative thickener (HEUR) jẹ hydrophobically títúnṣe ethoxylated polyurethane omi-tiotuka polima, eyi ti o jẹ ti kii-ionic associative thickener. O ni awọn ẹya mẹta: ipilẹ hydrophobic, pq hydrophilic ati ipilẹ polyurethane. Ipilẹ polyurethane gbooro ni ojutu kikun, ati pq hydrophilic jẹ iduroṣinṣin ni ipele omi. Ipilẹ hydrophobic ṣe idapọ pẹlu awọn ẹya hydrophobic gẹgẹbi awọn patikulu latex, awọn ohun elo, ati awọn pigments. , lara kan onisẹpo mẹta nẹtiwọki be, ki o le se aseyori idi ti nipọn.
O jẹ ifihan nipasẹ didan ti ipele emulsion, ṣiṣan ti o dara julọ ati iṣẹ ipele, ṣiṣe ti o nipọn ti o dara ati ibi ipamọ viscosity diẹ sii, ati pe ko si opin pH; ati pe o ni awọn anfani ti o han gbangba ni idena omi, didan, akoyawo, ati bẹbẹ lọ.
Awọn aila-nfani ni: ni alabọde ati eto viscosity kekere, ipa ipakokoro lori lulú ko dara, ati pe ipa ti o nipọn ni irọrun ni ipa nipasẹ awọn dispersants ati awọn olomi.
Akoko ifiweranṣẹ: Oṣu kejila-29-2022