1. Yam khoom thiab specifications
Muaj ntau hom cellulose ether cov khoom, thiab ntau hom muaj qhov sib txawv hauv kev ua tau zoo. Cov cellulose ethers muaj xws li hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), thiab lwm yam. Cov khoom no muaj ntau daim ntawv thov teb thiab cov yam ntxwv raws li cov qauv tshuaj sib txawv thiab cov txheej txheem ntau lawm.
HPMC: Feem ntau yog siv rau hauv cov khoom siv hauv tsev, tshuaj, khoom noj thiab lwm yam, nrog rau cov thickening zoo, zaj duab xis-tsim, dej tuav thiab adhesion.
HEC: Siv dav hauv cov txheej txheem, cov nplaum, cov tshuaj ntxuav tes, nrog cov thickening zoo, ruaj khov thiab dej solubility.
CMC: Nws yog dav siv nyob rau hauv cov khoom noj, tshuaj niaj hnub thiab papermaking industries, thiab muaj zoo thickening thiab stabilizing teebmeem.
Thaum xaiv qhov zoo ntawm cellulose ether, nws yog ib qho tsim nyog yuav tsum paub meej nws daim ntawv thov, kev ua haujlwm thiab cov kev qhia tshwj xeeb, xws li viscosity, qib kev hloov pauv, thiab lwm yam.
2. Viscosity
Lub viscosity ntawm cellulose ether cov khoom yog qhov tseem ceeb ntawm kev ua tau zoo, uas yuav cuam tshuam ncaj qha rau cov khoom rheological, solubility thiab siv cov nyhuv ntawm cov khoom. Lub viscosity ntawm cellulose ether tuaj yeem hloov kho raws li daim ntawv thov:
High viscosity cellulose ether: feem ntau yog siv rau hauv daim ntawv thov uas yuav tsum tau muaj zog thickening nyhuv thiab siab dej tuav, xws li tsev mortar thiab adhesives. Hom cellulose ether no tuaj yeem txhim kho cov dej tuav thiab ua haujlwm ntawm cov khoom.
Tsawg viscosity cellulose ether: feem ntau yog siv rau hauv daim ntawv thov nrog siab solubility thiab fluidity yuav tsum, xws li coatings, detergents thiab lwm yam teb, uas pab txhim kho fluidity thiab nto smoothness.
Qhov siab dua qhov viscosity, qhov nyuaj dua nws yog kom yaj. Yog li ntawd, kev xaiv cov khoom uas tsim nyog viscosity yuav tsum muaj kev xav txog kev tsim kho lossis kev ua haujlwm thiab cov kev xav tau ntawm cov khoom kawg.
3. Qib ntawm kev hloov pauv thiab hom hloov pauv
Cov khoom siv tshuaj lom neeg thiab cov yam ntxwv ntawm daim ntawv thov ntawm cellulose ether nyob ntawm seb hom thiab tus lej ntawm nws cov pab pawg hloov pauv. Qib ntawm kev hloov pauv yog hais txog qib uas cov pawg hydroxyl hauv cov cellulose molecule raug hloov, feem ntau qhia tias qhov nruab nrab ntawm cov neeg hloov pauv hauv ib chav tsev piam thaj (piv txwv li, hydroxypropyl, methyl, carboxymethyl, thiab lwm yam). Hom thiab qib ntawm kev hloov pauv ntawm qhov hloov pauv ncaj qha cuam tshuam rau solubility, thickening peev xwm thiab ntsev tsis kam ntawm cellulose ether.
High degree ntawm kev hloov cellulose ether: muaj dej solubility zoo thiab tsis tshua muaj gelation kub, haum rau daim ntaub ntawv uas yuav tsum tau muaj dej solubility los yog kub kub ua hauj lwm.
Qib qis ntawm kev hloov cellulose ether: tej zaum yuav muaj qhov kub thiab txias dua thiab cov dej tsis zoo, haum rau qee qhov tshwj xeeb xws li kev tshawb nrhiav roj av lossis ib puag ncig kub.
Tsis tas li ntawd, cov khoom siv sib txawv yuav muab cov cellulose ethers sib txawv ntawm cov tshuaj lom neeg, xws li carboxymethyl cellulose muaj ntsev zoo dua thiab kev daws teeb meem.
4. Solubility
Cov khoom lag luam zoo cellulose ether yuav tsum muaj cov solubility zoo kom lawv tuaj yeem tawg sai sai thiab tsim cov tshuaj ruaj khov thaum siv. Solubility yog cuam tshuam los ntawm yam xws li hloov, viscosity, thiab particle loj ntawm cov khoom. Zoo cellulose ethers yuav tsum muaj peev xwm yaj sai sai nyob rau hauv dej txias los tsim ib tug uniform colloidal tov, thiab tsis nquag mus rau agglomeration los yog uneven dispersion.
Cov ntsuas xws li kev sib cais thiab kev daws teeb meem thiab viscosity stability ncaj qha cuam tshuam rau kev ua haujlwm ntawm cov khoom hauv kev siv tiag tiag. Yog li ntawd, thaum xaiv cellulose ether, nws yog ib qhov tsim nyog los xyuas kom meej seb nws puas muaj siab solubility thiab stability nyob rau hauv nruab nrab siv.
5. Particle loj
Qhov loj me me ntawm cov khoom siv cellulose ether tseem yuav cuam tshuam rau nws qhov kev sib cais thiab siv cov nyhuv. Fine-particle cellulose ethers feem ntau yaj sai dua thiab tawg ntau qhov sib npaug, haum rau cov xwm txheej ntawm kev tsim kho sai lossis ua tiav, thaum coarse-particle cellulose ethers yuav yaj qeeb dua, tab sis tej zaum yuav muaj zog dua hauv qee daim ntawv thov.
Feem ntau, qhov loj me me ntawm cellulose ether yog qhia rau ntawm cov khoom lag luam daim ntawv lo, thiab cov tuam txhab tsim khoom kuj tuaj yeem hloov kho cov khoom sib txawv raws li cov neeg siv xav tau los hloov kho cov txheej txheem kev khiav hauj lwm sib txawv.
6. Purity thiab zoo stability ntawm cov khoom
Qhov zoo ntawm cellulose ether ncaj qha cuam tshuam rau nws daim ntawv thov cov nyhuv, tshwj xeeb tshaj yog nyob rau hauv cov teb uas yuav tsum tau zoo xws li zaub mov thiab tshuaj, cov khoom purity yog ib qho tseem ceeb cov txheej txheem. High-purity cellulose ether yuav tsum muaj tsawg impurities thiab yuav tsis muaj kev cuam tshuam tsis zoo rau xim, tsw, saj thiab kev ua tau zoo ntawm cov khoom kawg.
Tsis tas li ntawd, qhov zoo stability ntawm cov khoom kuj tseem ceeb heev. Txhawm rau kom ntseeg tau qhov sib xws ntawm cov khoom hauv cov khoom sib txawv, nws yog ib qho tsim nyog los xaiv cov chaw tsim khoom nrog kev tswj hwm nruj. Kev ruaj ntseg ntev ntev tuaj yeem txo qhov sib txawv uas yuav tshwm sim thaum siv, yog li ua kom cov txiaj ntsig zoo ib yam txhua lub sijhawm.
7. Cov khoom tsim nyog thiab kev pabcuam
Kev xaiv ib tus neeg muab khoom siv cellulose ether txhim khu kev qha kuj tseem ceeb heev. Tus neeg muag khoom zoo yuav tsum tsis yog tsuas yog muaj peev xwm tsim tau zoo thiab kev tswj hwm zoo, tab sis kuj tseem tuaj yeem muab kev pabcuam kev pabcuam thiab kev pabcuam tomqab muag.
Cov khoom tsim nyog: nkag siab txog tus neeg muag khoom tsim nyog tsim nyog, kev ua haujlwm hauv kev lag luam, ntawv pov thawj (xws li ISO daim ntawv pov thawj, thiab lwm yam) thiab seb nws puas muaj cov kev cai tsim nyog hauv cov haujlwm muaj feem xyuam.
Kev pab txhawb nqa: Cov neeg muag khoom zoo heev yuav tsum muaj peev xwm muab cov lus qhia txog cov khoom siv raws li cov neeg siv khoom xav tau los xyuas kom meej tias cov neeg siv khoom tuaj yeem siv cov khoom kom raug thiab ua tiav cov txiaj ntsig zoo tshaj plaws.
Kev pab cuam tom qab muag: Nws tseem yog ib qho tseem ceeb uas yuav tau xaiv cov neeg muag khoom uas tuaj yeem muab kev pabcuam raws sijhawm thiab kev daws teebmeem.
8. Tus nqi thiab tus nqi zoo
Tus nqi ntawm cellulose ether cov khoom sib txawv nyob ntawm qhov zoo, hom, thiab specifications. Thaum xaiv cov khoom, koj yuav tsum tsis tsuas yog nrhiav tus nqi qis, tab sis yuav tsum ua tib zoo xav txog nws qhov kev ua tau zoo, cov txiaj ntsig ntawm daim ntawv thov, thiab tus nqi siv. Qee qhov xwm txheej, txawm hais tias cov khoom siv cellulose ethers zoo tshaj yog kim dua, lawv qhia tau zoo dua hauv kev siv, tuaj yeem txhim kho kev tsim khoom lossis txhim kho cov khoom zoo, thiab muaj txiaj ntsig zoo dua.
Thaum nrhiav cov khoom lag luam zoo cellulose ether, koj yuav tsum ua tib zoo xav txog cov khoom lag luam, viscosity, qib ntawm kev hloov pauv, solubility, particle loj, purity, thiab zoo stability raws li daim ntawv thov tiag tiag, thiab tseem ntsuas tus neeg muag khoom tsim nyog thiab cov kev pabcuam. Tsuas yog los ntawm kev sib piv cov kev ua tau zoo thiab kev ua tau zoo ntawm cov khoom sib txawv tuaj yeem pom cov cellulose ethers tsim nyog kom tau raws li cov kev xav tau ntawm cov kev lag luam tshwj xeeb thiab kev siv cov xwm txheej.
Post lub sij hawm: Sep-13-2024