Kev Siv Dej-raws li Dispersants hauv Kev Lag Luam Papermaking
Feb 10, 2024
Dej raws li dispersants tuaj yeem txo qhov sib sau ua ke ntawm cov khoom lossis cov kua hauv cov txheej txheem dispersion, adsorb rau ntawm qhov chaw ntawm ntau yam me me, thiab tsim cov electrostatic repulsion kom disperse lawv, zam sedimentation thiab coarsening. Feem ntau muab faib ua: fatty acids, fatty amides, thiab esters; Paraffins; Hlau xab npum; Tsawg molecular hnyav waxes.
Lub mechanism ntawm kev txiav txim ntawm cov dej-raws li dispersants yog hais tias qhov sib ntxiv ntawm anionic los yog non-ionic surfactants nyob rau hauv lub slurry txo qhov nro ntawm lub slurry ncua kev kawm ntawv, txhim kho lub wettability ntawm fiber nto, thiab txo cov flocculation los ntawm hydrophobicity ntawm cov fibers. .
Ib tug loj npaum li cas ntawm cov dej-raws li dispersants yog siv nyob rau hauv cov txheej txheem papermaking, yog li dab tsi yog lub luag hauj lwm ntawm cov dej-raws li dispersants thoob plaws hauv tag nrho cov txheej txheem?
1. Endowing fibers nrog cov nqi saum npoo, ua rau lawv yuav luag tsuas yog anionic surfactants.
2. Npog cov fiber ntau los tiv thaiv cov colloid.
3. Ua ib lub xeev khov nyob ib ncig ntawm cov fibers kom tsis txhob muaj fiber ntau sib tsoo thiab sib sau ua ke.
4. Surfactants muaj kev ncua kev kawm zoo li adsorbents, adsorbing nyob rau saum npoo ntawm fibers los ua ib zaj duab xis dej, cia fibers swb tawm tsam ib leeg yam tsis muaj entanglement.
5. Qhov kev hloov ntawm qhov chaw ntub dej ntawm cov fibers kuj txo qhov kev sib txhuam ntawm fibers, txo lub sijhawm rau fiber ntau adhesion, hloov lub zog hluav taws xob ntawm fibers, nce qhov tsis zoo ntawm cov fibers, thiab ua rau kom muaj zog ntawm cov fibers, yog li tsim kom ruaj khov. tsis zoo nqi ncua kev kawm ntawv.
