Vim li cas uaDispersant NNOua hauj lwm?
Dispersant NNOcov molecules muaj cov pab pawg anchoring thiab stabilizing qhov chaw. Lub luag haujlwm ntawm pawg anchoring yog los muab lub zog txaus los khi rau cov xim pleev xim rau cov khoom. Dispersant molecules tsis poob ntawm qhov chaw ntawm cov khoom, uas yog qhov yuav tsum tau ua ua ntej rau dispersant ua haujlwm. Lub luag haujlwm ntawm stabilizing ib feem yog kom stabilize cov pigment aggregate particles dispersed los ntawm txhua yam quab yuam los ntawm electrostatic repulsion thiab spatial tsis kam nyob rau hauv cov kua theem los tiv thaiv cov hais los ntawm aggregating.
Nyob rau hauv cov organic solvents, thaum ruaj khov ib feem ntawm lubDispersant NNOstabilizes cov dispersed pigment hais los ntawm spatial tsis kam, thaum qhov sib nrug ntawm cov dispersant hais yog me dua qhov loj ntawm cov hnyav saw, cov hnyav saw sib sib zog nqus thiab cov entropy txo. Hauv dej, ionization tshwm sim nyob ib puag ncig ionic pawg los tsim ob txheej txheej, thiab electrostatic repulsion tiv thaiv particle agglomeration. Yog tias tsis yog-ionized polyether ruaj khov, polyether stabilizes dispersed pigment hais los ntawm spatial kuj.
Nyob rau hauv cov txheej txheem ntawm cov ntaub so ntswg thiab cov ntawv ua, ntau cov ntaub ntawv tshuaj dispersants yog xav tau los daws cov teeb meem ntawm dispersion, tuav, pom thiab lwm yam. Ntxiv cov tshuaj dispersants rau pulp tuaj yeem txo cov fiber ntau winding thiab ua kom daim ntawv du thiab ua haujlwm zoo. Feem ntau, cov tshuaj additives yog siv nyob rau hauv lub pulp filtration, xws li ntws AIDS, lim, dispersants, ntxiv dag zog rau cov neeg ua hauj, foaming agents, preservatives, lom enzymes, thiab lwm yam. Nyob rau hauv no series ntawm kev npaj, ib txhia yog ib tug neeg, ib co yog tov, koom tes nrog ib leeg. txhawm rau txhim kho nplooj ntawv zoo, txhim kho kev tsim khoom zoo, txo cov nqi tsim khoom.
Fiber yog qhov tseem ceeb cuam tshuam rau daim ntawv zoo hauv cov txheej txheem papermaking. Zoo li qee qhov ntev fiber ntau yog qhov tsis zoo sib xws, ua rau cov khoom siv ntxiv, cov fillers thiab lwm yam nyob deb ntawm ib leeg, thiab tom qab ntawd nws yog qhov nyuaj kom tau txais kev ua haujlwm zoo, lub zog zoo ntawm daim ntawv. Txawm li cas los xij, nrog rau qhov sib ntxiv ntawm qhov tsim nyog dispersant, qhov saum npoo ntawm cov khoom tuaj yeem tsim cov qauv bimolecular, thiab cov dej noo ntawm cov khoom tuaj yeem txhim kho. Qee cov fiber ntau zoo dispersants yuav tsum muaj qee yam pyrolytic zog, uas tuaj yeem txhim kho qhov kev ua haujlwm ntawm kev tawg nrog qhov kub thiab txias. Tom qab ntawd txo cov viscosity ntawm pulp, txhim kho daim ntawv nto smoothness thiab softness.
Post lub sij hawm: May-26-2022