Hydroxypropyloosylcelleculose

Txheej txheem cej luam: Raug xa mus rau HPMC, dawb lossis tawm-dawb fibrous lossis granular hmoov. Muaj ntau hom ntawm cellulose thiab tau siv dav, tab sis peb feem ntau yog sib cuag nrog cov neeg siv khoom hauv cov khoom siv lub tsev ua haujlwm qhuav. Feem ntau cov cellulose hais txog hypromellose.

Cov Txheej Txheem Ntau Lawm: Lub ntsiab raw ntawm HPMC: Kev Kho Dua Tshiab, yog tias muaj hnub nyoog ntawm lub cev, thiab cov pa roj hmab, thiab, cov pa roj hmab, thiab, yog li ntawd, yog li ntawd qhov nruab nrab ntawm polymerization Alkali fiber ntau nyob hauv cov khoom uas yuav tsum tau. Tso Alkali Fibers rau hauv lub nroog Etherification, ntxiv tshuaj pleev me thiab methyl strloride nyob rau hauv lem, thiab muab meth0 ° C rau 5-80 ° C rau 5-8 MPA. Tom qab ntawd ntxiv qhov tsim nyog ntawm hydrochloric acid thiab oxalic acid rau cov dej kub ntawm 90 ° C kom ntxuav cov khoom kom nthuav cov ntim. Lub cev qhuav dej nrog ib qho centrifuge. Ntxuav kom txog thaum nruab nrab, thiab thaum noo noo cov ntsiab lus nyob rau hauv cov khoom siv tsawg dua 60%, qhuav nws nrog cua kub kub ntawm 130 ° C kom tsawg dua 5%. Ua haujlwm: Cov dej ua haujlwm, thickening, thixotropic anti-sag, huab cua-entraining kev ua haujlwm, chaw ua haujlwm.

Dej Tuav Txuag: Dej Tuav Ruaj Ntseg yog qhov khoom tseem ceeb tshaj plaws ntawm cellulose ether! Hauv kev tsim cov putty gypsum tshuaj tua kab thiab lwm yam ntaub ntawv, cellulose ether daim ntawv thov yog qhov tseem ceeb. Cov dej txuag tau siab tiav tuaj yeem hloov kho Cement tshauv thiab calypsum (ntau dua cov tshuaj tiv thaiv, muaj zog dua). Raws li tib qho kev mob, ntau dua lub viscosity ntawm cellulose ntawm cellulose (qhov sib txawv ntawm cov dej rov qab (qhov sib txawv saum 100,000 viscosity yog nqaim); Qhov siab dua qhov ntau dua, qhov zoo dua cov dej khaws cia, feem ntau yog ib qho me me ntawm cellulose eter tuaj yeem txhim kho lub cug tshuaj ua haujlwm. Dej tswj kav, thaum cov ntsiab lus nce mus txog ib theem, cov qauv ntawm kev nce dej khaws cia ua kom qeeb qeeb; Cov dej tswj hwm tus nqi ntawm cellulose feem ntau txo qis thaum cov neeg muaj kev pab kub siab ntxiv tseem muaj kev ua tau zoo hauv qab. Dej khaws cia. Lub intertomusion ntawm dej lwg me thiab cellulose ither molecular charts, yog li kev txhim kho dej hauv qab dej etabling, thiab txhim kho cov dej khaws cia ntawm cov xis mas slurry.

Thickening, thixotropic thiab anti-sag: imparts zoo nkauj viscosity rau ntub cug! Nws tuaj yeem ua kom nce cov nplaum ntawm cov txheej ntub thiab txheej txheej txheej, thiab txhim kho kev tawm tsam kev ua yeeb yam ntawm cug. Lub thickening nyhuv ntawm cov cellulose cellulose muaj kev tshem tawm tsis kam thiab homogeneity ntawm cov khoom siv ua tshiab, cais cov khoom siv kev sib cais, cais thiab los ntshav. Cov nyhuv tuab ntawm cellulose cov neeg muaj kev pab cuam cellulose ntawm cov khoom siv cov paj tsib los ntawm cov viscosity ntawm cellulose ether. Raws li tib qho kev mob, ntau dua lub viscosity ntawm cellulose ntawm cov khoom siv viscosity, tab sis yog tias lub viscosity corcosity heev, nws yuav cuam tshuam ntawm cov khoom siv nqaj (xws li cov hlua khi thiab cov scraper zoo heev). ua haujlwm). Kev sib xyaws tus kheej cug thiab tus kheej-sib cav sib xyaw ua ke uas yuav tsum tau muaj txiaj ntsig zoo ntawm cov visculose qis ether. Tsis tas li ntawd, cov nyhuv tuab ntawm cellulose ether yuav ua rau cov khoom siv dej kom haum thiab nce cov qoob loo ntawm cug. High viscosity cellulose cellulose ethous Kev daws muaj siab thixotrostropy, uas tseem yog tus yam ntxwv ntawm cellulose ether. Cov kev daws teeb meem aqueous feem ntau muaj pseudopastic, tsis-thixotropic txaus siab hauv qab no lawv qhov kub thiab txias, tab sis Newtonian Flow cov khoom ntawm cov nqi qis. Pseudoplastic nce nrog nce molecular hnyav lossis concentration ntawm cellulose ether. Cov tshuaj pleev cov qauv qauv tau tsim thaum qhov kub tau nce, thiab siab thixotropic txaus tshwm sim. Cellulose Cov neeg muaj kev hais nrog kev ua kom siab thiab qis viscosity ua kom pom qhov ua kom zoo nkauj thixotropy txawm nyob hauv qab cov pa taws kub. Cov cuab yeej no yog cov txiaj ntsig zoo rau kev tsim kho lub tsev tshuaj khib kom kho nws txoj kev ntsuas thiab sag. Nws yuav tsum tau sau tseg ntawm no tias qhov siab dua ntawm cellulose, tab sis ntau dua cov txheeb ze lub zog, uas muaj qhov tsis zoo rau ntawm lub tshuaj khib thiab ua haujlwm.

Caws: Cellulose ether muaj cov nyhuv huab cua pom tseeb ntawm cov khoom siv cement tshiab. Cellulose ether muaj ob pab pawg hydrophilic (pawg neeg ildhoth, yog qhov ua haujlwm ntawm hydx Cov cua-nkag cov nyhuv ntawm cellulose ether yuav tsim cov yas ua haujlwm ntawm lub cev ua haujlwm, uas tau txais txiaj ntsig rau kev ua haujlwm ntawm lub cug. Nws tseem yuav nce ntxiv cov zis tawm ntawm lub tshuaj khib. , txo tus nqi cug ntau lawm; Tab sis nws yuav nce poroses ntawm cov khoom tawv tawv ntawm cov khoom tawv tawv thiab txo nws cov khoom siv xws li xws li muaj zog thiab elastic maculus. Raws li surfactant, cellulose ether tseem muaj cov nyhuv ntub lossis cov khoom siv cua ua ke yuav txo cov nyhuv cua, tab sis nws cov nyhuv ua kom tsawg dua. Cov nyhuv ntawm kev ntws yog kev sib xyaw ua ke ntawm kev ntxiv thiab ua kom tuab. Thaum cov ntsiab lus ntawm cellulose ether yog tsawg heev, nws yog feem ntau yog manifested li plasticizing lossis txo cov nyhuv dej; Thaum cov ntsiab lus yog qhov siab, cov nyhuv tuab ntawm cellulose nce nrawm, thiab nws cov pa-entraining cov nyhuv, yog li kev ua haujlwm tau nce. Thickening nyhuv lossis nce dej ntxiv.

Teem Retardation: Cellulose ether tuaj yeem ncua cov txheej txheem hydration ntawm cov cement. Cellulose Cov neeg tsim kho lub tshuaj khib nyiab nrog ntau cov txiaj ntsig zoo, thiab tseem txo cov tshuaj tsuag kub thaum ntxov thiab ncua cov txheej txheem ntawm cov cement. Qhov no tsis zoo rau cug siv nyob rau hauv cov cheeb tsam txias. Qhov kev ua kom rov ua haujlwm no yog tshwm sim los ntawm kev kos duab ntawm cellulose ether molecules ntawm cov khoom siv dej xws li CSH thiab Ca (Oh) 2. Vim tias qhov nce hauv lub viscosity ntawm cov kab viscosity ntawm cov kab viscosity, lub cellulose itle txo lub ions hauv kev daws teeb meem, yog li ncua cov txheej txheem hydration. Qhov siab dua ntawm cellulose ntawm cellulose ntawm cellulose ntawm cov ntxhia cov khoom, ntau tshaj tawm cov nyhuv qeeb. Cellulose hais tsis yog tsuas yog retard teeb tsa, tab sis kuj tau rov ua kom cov txheej txheem tawv ntawm cov txiv neej collftion zog. Kev ua kom rov ua tau zoo ether nyob ntawm tsis tsuas yog nyob ntawm nws cov kev xav hauv cov qauv ntxhia, tab sis kuj nyob rau cov qauv tshuaj. Qhov siab dua qib ntawm methylation ntawm HEMC, qhov zoo dua qhov kev ua tau zoo ntawm kev ua tau zoo ntawm cellulose ether. Lub retardation nyhuv yog muaj zog dua. Txawm li cas los xij, lub viscosity ntawm cellulose ether muaj me ntsis nyhuv rau ntawm cov cinning kinetics ntawm xis mas. Nrog rau kev nce ntawm cellulose cellen cov ntsiab lus, lub sij hawm lub sij hawm ntawm collh nce siab heev. Muaj ib qho kev sib txheeb zoo tsis zoo ntawm qhov pib lub sij hawm cug thiab cov ntsiab lus ntawm lub sij hawm teeb tsa muaj cov ntsiab lus ntawm cellulose ether. Peb tuaj yeem tswj hwm lub sijhawm ua haujlwm ntawm lub tshuaj khib los ntawm kev hloov cov ntsiab lus ntawm cellulose ether. Hauv cov khoom lag luam, nws ua lub luag haujlwm ntawm kev khaws dej, thickening, ncua kev noj tshuaj hydration fais fab, thiab txhim kho kev tsim kho kev ua haujlwm. Muaj peev xwm ua tau zoo dej ua rau cement Gypsum Ashinter zoo, thiab tib lub sijhawm tuaj yeem txhim kho kev tsim kho zoo, txhim kho kev txhim kho kev tsim kho thiab ua haujlwm tau zoo. Kho lub sijhawm. Txhim kho tshuaj tsuag lossis tsis muaj sijhawm ntawm cug, nrog rau cov qauv muaj zog. Nyob rau hauv cov txheej txheem thov tiag tiag, nws yog qhov tsim nyog los txiav txim siab hom, viscosity, thiab tus nqi ntawm cellulose raws li cov khoom sib txawv, kev siv tes ua, thiab ib puag ncig.