Cov yam ntxwv ntawm dispersants yog feem ntau xav nyob rau hauv lawv amphiphilic molecular qauv, muaj peev xwm ntub ntub, dispersion ruajffchism thiab lub luag haujlwm ntawm kev txhim kho kev ua haujlwm. Cov yam ntxwv tshwj xeeb yog li nram qab no:
I. Tus yam ntxwv tshuaj
Amphiphilic Molecular Qauv
Dispersant molecules muaj cov pab pawg lipophilic, uas tuaj yeem txo cov khoom siv ua kua lossis txhawb nqa cov khaub ncaws sib cais ntawm cov kua hauv cov kua.
Ii. Cov yam ntxwv ua haujlwm
Ntub nyhuv
Dispersants tuaj yeem ntub rau saum npoo thiab pores ntawm cov xim pigments, muab cov txheej txheem yooj yim rau cov txheej txheem rho tawm tom ntej.
Piv txwv li: Hauv cov txheej txheej hauv dej, qhov tsis txaus ntseeg ntawm cov dispersants tuaj yeem hloov cov neeg sawv cev thoob plaws thiab ua kom yooj yim rau cov qauv.
Ob lub luag haujlwm ntawm dispersion thiab ruaj khov
Electrostatic repulsion (ob lub hauv paus ntsiab lus): anionic disporants tiv thaiv partality yuam kev ntawm cov khoom siv los ua qhov chaw tsis muaj zog.
Staper Delge High: tsis-ionic lossis polymer dispersants adsorb ntawm cov nplai ntawm cov plaub hau ntev los tiv thaiv cov lus los tiv thaiv kom tsis txhob muaj.
3. Txhim kho cov ntawv thov kev ua tau zoo
Txhim kho cov khoom siv lub cev
Txhim kho cov glars thiab qib: txhim kho lub tiaj ntawm txheej ntawm cov txheej txheem thiab txo qhov sib sau ntawm cov thawj.
Tiv thaiv cov xim ntab
Txhim kho cov txheej txheem ruaj khov
Inhibit sedimentation thiab flocculation: txuas lub sijhawm khaws cia ntawm kev ncua ntawv los ntawm kev tshem tawm me me.
Haum rau cov tshuab nyuaj: polymer dispersants tuaj yeem siv cov hluav taws xob hloov kho thiab cov stanbul asculsion thiab yog qhov tsim nyog rau cov tshuab siab lossis cov xim sib xyaw.
4. Kev Siv Tau thiab Ntau Yam
Ntau Hom
Anionic hom (xws li sodium polyacrylate): haum rau inorganic pigments, tus nqi qis tab sis nkag siab rau ph.
Cov hom tsis yog-ionic (xws li polyoxythylene ether): tsis muaj siv pH, tsim nyog siv tab sis tsis muaj zog dispersion nyhuv.
Polymer hom (xws li polyurethane): muaj zog ruaj khov, haum rau cov ntsiab lus muaj zog lossis cov xim organic.
Muaj zog sib raug zoo
Cov tsis muaj peev xwm raug xaiv tau tuaj yeem raug xaiv raws li cov tshuab sib txawv (dej raws, cov kuab tshuaj, cov ntsiab lus zoo ntxiv nrog cov resins thiab ntxiv.