Kev tshuaj xyuas cov tshuaj muaj pes tsawg leeg ntawm cov dej-Raws li cov xim: Tso lub Foundation rau Green Txheej Kev Ua Haujlwm

Yog vim li cas dej-raws li cov xim ua tau zoo sib npaug ntawm kev tiv thaiv ib puag ncig thiab kev ua haujlwm yog nyob rau hauv lawv cov tshuaj lom neeg muaj pes tsawg leeg thiab kev tsim qauv tsim.Piv rau cov kuab tshuaj ib txwm siv -raws li cov txheej txheem uas siv cov kuab tshuaj organic raws li qhov nruab nrab dispersion, dej-raws li cov xim siv dej deionized ua cov cab kuj tseem ceeb, ua ke nrog kev sib koom ua ke ntawm ntau yam kev ua haujlwm. Qhov no txo ​​qis qhov tsis zoo ntawm cov organic compound (VOC) emissions thaum endowing txheej nrog cov yeeb yaj kiab zoo heev - tsim cov khoom thiab kav ntev. Kev nkag siab tob txog lawv cov tshuaj muaj pes tsawg leeg yuav pab kom nkag siab cov laj thawj thiab thaj tsam ntawm cov khoom lag luam kev tswj hwm.

Lub ntsiab tseem ceeb ntawm dej- cov xim pleev xim yog dej-raws li resin emulsion, uas yog lub hauv paus txiav txim siab qhov kev ua tau zoo ntawm cov xim zaj duab xis. Cov hom muaj xws li acrylic emulsions, polyurethane dispersions, epoxy resin emulsions, thiab alkyd hloov emulsions. Acrylic emulsions muaj huab cua zoo tiv thaiv thiab xim tuav, haum rau lub tsev sab nrauv phab ntsa thiab ntoo coatings; polyurethane dispersions yog yus muaj los ntawm siab elasticity, abrasion tsis kam, thiab adhesion, thiab yog dav siv nyob rau hauv industrial tiv thaiv thiab pem teb txheej; epoxy emulsions muaj qhov zoo tshaj plaws corrosion tsis kam thiab kev sib khi lub zog, thiab feem ntau siv hauv kev tiv thaiv hlau corrosion. Lub particle loj faib, iav hloov kub, thiab emulsion stability ntawm resin emulsion ncaj qha cuam tshuam rau hardness, yooj, thiab tshuaj tsis kam ntawm cov xim zaj duab xis.

Pigments thiab fillers yog cov xim thiab sau cov dej -raws li xim. Pigments muab faib ua ob pawg loj: inorganic thiab organic. Inorganic pigments, xws li titanium dioxide thiab hlau oxide pigments, muaj zog lightfastness thiab nkaum hwj chim, thiab feem ntau yog siv rau lub teeb xim los yog siab - daim ntaub ntawv npog. Organic pigments muaj cov xim vibrant tab sis kuj tsis muaj zog tiv thaiv huab cua, ua rau lawv haum rau kho kom zoo nkauj sab hauv. Fillers, xws li calcium carbonate, talc, thiab barium sulfate, tuaj yeem txhim kho cov khoom rheological ntawm cov txheej txheem, txo cov nqi, thiab txhim kho cov neeg kho tshuab lub zog thiab khawb tsis kam ntawm txheej. Txhawm rau kom tsis txhob muaj qhov sib txawv ntawm cov xim sib txawv thiab cov xim sib txawv, cov xim thiab cov fillers yuav tsum tau ua hauv av thiab ua kom zoo rau qhov loj me me thiab tsim kom muaj kev cuam tshuam ruaj khov nrog cov resin emulsion.

Txawm hais tias cov khoom siv ntxiv yog siv me me hauv dej- cov xim pleev xim, lawv ua lub luag haujlwm tseem ceeb hauv kev tswj hwm kev ua haujlwm. Zaj duab xis- kev pab ua kom txo qis cov yeeb yaj kiab yam tsawg kawg nkaus - ua kom sov ntawm emulsion, ua kom muaj kev tsim cov xim tsis tu ncua thiab ua tiav ntawm chav tsev kub. Defoamers inhibit qhov tsim thiab khaws cov npuas thaum lub sijhawm tsim khoom thiab siv, txhim kho qhov smoothness. Thickeners thiab leveling agents yog siv los kho viscosity thiab txhim kho txheej txheej, raws li, tiv thaiv sagging thiab txhuam cov cim. Preservatives thiab fungicides inhibit microbial kev loj hlob hauv aqueous systems, ncua lub neej txee. Cov tshuaj compatibility thiab lub sij hawm ntawm kev sib ntxiv ntawm cov additives yuav tsum precisely tswj; txwv tsis pub, qhov system tsis ruaj khov lossis kev ua haujlwm tsis zoo yuav tshwm sim.

Qhov nruab nrab dispersion yog feem ntau deionized dej. Nws purity ncaj qha cuam tshuam rau lub cev conductivity thiab emulsion stability. Cov impurities tuaj yeem cuam tshuam cov qauv emulsion, ua rau demulsification lossis flocculation. Qhov kev faib ua feem ntawm cov dej nyob rau hauv formulation yuav tsum ua tib zoo xav txog cov resin concentration, daim ntawv thov viscosity, thiab zaj duab xis - tsim cov kev cai. Too much water will reduce coating density, while too little will affect wetting and leveling.

Zuag qhia tag nrho, cov tshuaj muaj pes tsawg leeg ntawm dej- cov xim pleev xim yog ib qho ruaj khov dispersion system tsim hauv dej los ntawm dej-raws li resin emulsions, pigments, fillers, thiab multifunctional additives. Cov khoom sib cuam tshuam ntawm qib molecular, sib koom ua ke txiav txim siab cov khoom lag luam ib puag ncig, kev hloov pauv tau, thiab kev pabcuam kev ua haujlwm. Nrog rau kev nce qib hauv polymer synthesis thiab kev sib txuas chemistry, cov tshuaj muaj pes tsawg leeg ntawm dej- cov xim pleev xim yog ua kom zoo dua qub, ua rau lawv ua kom pom kev ua tau zoo piv rau lossis txawm tias dhau cov kuab tshuaj ntau dua -raws li cov txheej txheem hauv ntau qhov kev thov, muab cov khoom siv hauv paus rau cov xim ntsuab.