01 Lub Neej
Thickener yog ib hom rheological ntxiv, uas tsis tuaj yeem tsuas yog thicken txheej thiab tab sis kuj ua rau txheej txheej thiab cov khoom siv hluav taws xob zoo. Thickener muaj cov yam ntxwv ntawm cov tshuaj me, pom tseeb siv, tshuaj ntxiv, cov tshuaj ntsuab, cov tshuaj pleev zaub mov, cov tshuaj ntsuab, kev ua haujlwm, tawv ua thiab lwm yam lag luam.
Thickeners tau muab faib ua cov khoom siv oily thiab cov dej raws li cov siv sib txawv, thiab feem ntau ntawm cov thickeners yog hydrophilic polymer tebchaw.
Nyob rau tam sim no, muaj ntau yam cov thickeners muaj nyob hauv kev ua lag luam. Raws li cov muaj pes tsawg leeg thiab kev siv tshuab ntawm kev ua, lawv feem ntau muab faib ua plaub hom: thickeners, cellulose, polyacrylate thiab kev sib haum polyurethane thickenters.
02 Kev Sib Tw
Cellulosic thickener
Cellulosic thickeners muaj keeb kwm ntev ntawm kev siv thiab muaj ntau ntau yam, suav nrog methylethyl cellulose, thiab lwm yam, uas siv los ua lub zog ntawm cov thickeners. Feem ntau siv ntawm cov no yog hydroxyethyl cellulose.
Thickening tshuab:
Cov txheej txheem tuab ntawm cov tuab ntawm lub cellular Viscosity tseem tuaj yeem nce los ntawm kev ua haujlwm ntawm cov molecular, qhia cov viscecior loj heev ntawm cov zoo nkauj thiab qis shear, thiab qis viscosity ntawm cov siab shear. Qhov no yog vim hais tias ntawm tus nqi zoo li qub lossis qis qis, lub cellulose molecular charets muaj nyob rau hauv lub xeev tsis txaus ntseeg, ua kom lub kaw lus dav dav; Thaum lub siab ntawm cov qhab nia siab, cov lwg me me tau teem rau hauv ib qho kev sib tw sib piv rau cov kev taw qhia ntws, thiab yooj yim rau ib leeg swb, yog li lub kaw lus viscosity poob.
polyacrylic thickener
Polyacrylic acid thickener, tseem hu ua Alkali o ou thickener (ASE) tau npaj los ntawm (met) Acrylic acid thiab ethyl actrylate los ntawm qee cov polymerization.
Tus qauv dav dav ntawm Alkali-Oleable Thickener yog:
Thickening me ntsis: cov txheej txheem tuab ntawm polyacrylic acid thickenter yog tias cov tuab sib deev ntawm cov nqaj hlau, yog li nce lub visce dej ntawm cov theem dej. Tsis tas li ntawd, nws tseem ua cov qauv network los ntawm kev ntaus nkauj ntawm cov tshuaj yas thiab cov pigments, nce cov viscosity ntawm lub system.
Cov Khoom Siv Hluav Taws Xob Polyurethane Thickener
Polyurethane thickener, xa mus rau cov hydrophobic pab pawg-hloov ethoxylated polyurethan, uas belongs rau cov neeg tsis yog-ionic sib deev. Heur yog muaj peb ntu: Hydrophobic pab pawg, hydrophilic saw thiab polyurethane pab pawg. Cov pab pawg hydrophobic ua rau lub koom haum tuav haujlwm thiab yog OleylecylStab, thiab lwm yam yog polyethers, xws li polyoxyethylene thiab nws cov derivatenene thiab nws cov kev ua haujlwm. Cov molecular chart of heur yog txuas los ntawm polyurethane pab pawg, xws li IPDI, TDI thiab HMDI.
Thickening tshuab:
1) Lub Hydrophobic kawg ntawm cov molecule txuam nrog cov qauv hydrophobic xws li cov qauv roj av, thiab cov xim muaj txiaj ntsig zoo, uas tseem yog tus ntawm siab viscscosity;
2) zoo li surfactant, thaum qhov kev kub siab tam sim no yog siab dua qhov tseem ceeb tshaj qhov mikelle concentration, thiab nruab nrab-shear viscosity (1-100s-1) yog feem ntau ua los ntawm nws;
3) Lub saw hlau hydrophilic ntawm cov molecule kev ua ntawm hydrogen daim ntawv cog lus ntawm cov dej molecule kom ua tiav cov txiaj ntsig thickening.
Inorganic thickener
Inorganic thickeners tsuas yog muaj fumed dawb carbon dub, sodium bentonite, organic bentonite, diatomaceous lub ntiaj teb, thiab silica gel.
Thickening tshuab:
Ntawm no, noj organic bentonite li ib qho piv txwv, nws lub tshuab ntsuas nws yog raws li hauv qab no:
Organic Bentonite feem ntau tsis muaj nyob rau hauv daim ntawv ntawm cov thawj qhov me me, tab sis feem ntau yog kev sib sau ua ke ntawm ntau cov lus. Cov ntsiab lus tseem ceeb tuaj yeem tsim los ntawm cov txheej txheem ntawm kev ntub dej, dispersing thiab ua kom ua kom, ua kom muaj txiaj ntsig zoo thixotropic nyhuv.
Nyob rau hauv polar system, tus polar activator tsis tsuas yog muab tshuaj lom neeg lub zog los mus disperse, tab sis kuj tseem muaj cov pab pawg nyob rau hauv cov pawg hydroxyl ntawm ntug bentonite rau daim ntawv. Saib, los ntawm kev nkhaus ntawm cov dej lwg me, suav tsis suav nrog cov kab nrig ntawm txoj kab sib xyaw ua ke thiab tsim cov teebmeem thicken ntawm lawv cov peev txheej thixotropic los ntawm lawv cov peev xwm ua kom muaj peev xwm ua tau muaj peev xwm. Raws li kev txiav txim ntawm sab nraud quab yuam, tus qauv raug puas tsuaj thiab lub viscosity txo, thiab sab nraud quab yuam rov los rau thawj lub xeev. viscosity thiab cov qauv.
Daim Ntawv Thov 03
Cellulosic thickener cellulosic cellulosic thickener muaj siab thickening equiciency, tshwj xeeb tshaj yog rau cov dej ua kom tuab; Nws muaj ob peb kev txwv rau txheej thiab tau siv dav; Nws tuaj yeem siv rau hauv cov xov tooj dav. Txawm li cas los xij, muaj qhov tsis zoo xws li theem uas tsis zoo, txhais tau thaum cov txheej uas cov menyuam, thiab raug rau cov microbial. Vim tias nws muaj qis viscosity nyob rau hauv siab shear thiab siab viscosity nyob rau hauv lub siab zoo nkauj thiab muaj viscosity ntxiv tom qab txheej, uas tuaj yeem tiv thaiv sagging, tab sis ntawm qhov tod tes, nws ua rau kev tsis zoo.
Polyacrylic thickener polyacrylic acid thickener muaj cov khoom siv thickening thiab leveling biologity, tab sis yog rhiab rau dej peepees thiab dej tsis zoo.
Lub Koom Haum Ua Haujlwm Koom Tes Nrog Koom Tes Polyurethane Thickenete tau rhuav tshem hauv qab kev ua ntawm shear zog, thiab lub viscosity txo. Thaum lub zog shear ploj, lub viscosity tuaj yeem rov qab, uas tuaj yeem tiv thaiv cov tshwm sim ntawm sag hauv cov txheej txheem kev tsim kho. Thiab nws viscosity rov qab muaj qee qhov hysteresis, uas yog conducive rau theem ntawm txheej zaj duab xis. Tus txheeb ze cov neeg sib piv (ntau txhiab xyoo (phav phav phav) Cov pab dej siab ntawm cov cellulose thickener yuav cuam tshuam cov dej tsis zoo, tab sis polyurethane thickener thiab hydrophobic pab pawg, tuaj yeem txhim kho cov dej tsis kam ntawm cov yeeb yaj kiab txheej. Txij li thaum cov kab txuas ntawm cov kab ke koom nrog hauv lub koom haum, yuav tsis muaj cov txheej flocculation, yog li txheej duab zaj duab xis tuaj yeem yog thiab muaj lub siab loj.
Inorganic thickener dej thentenerer muaj qhov zoo ntawm cov tuab tuab, zoo li thixotropy, ntau tus nqi yoog, thiab ruaj khov. Txawm li cas los xij, txij li Bentonite yog cov hmoov av inorganic nrog cov teeb pom kev zoo zoo, nws tuaj yeem txo cov npoo npoo ntawm txheej yeeb yaj kiab thiab ua zoo li tus neeg sawv cev. Yog li ntawd, thaum siv bentonite nyob rau hauv glossing lowx xim, yuav tsum tau them los tswj cov tshuaj. Nanotechnology tau pom tau pom qhov nanoscale ntawm inorganic hais, thiab kuj ua kom muaj txiaj ntsig zoo nkauj thickeners nrog qee qhov khoom tshiab.
Lub sij hawm Post: Feb-22-2025