Cov xim pleev xim yog siv dav hauv ntau yam kev lag luam thiab tsev neeg cov xwm txheej kom tshem tawm cov xim, txheej thiab lwm yam nyuaj rau ntxuav.Txhawm rau txhim kho kev ua haujlwm ntawm cov tshuaj ntxuav tes no, ntau yam tshuaj lom neeg tau nkag rau hauv lawv, thiab hydroxyethyl cellulose (HEC) yog ib qho tseem ceeb ntxiv.
Txheej txheem cej luam ntawm hydroxyethyl cellulose
Hydroxyethyl Cellulose (HEC) yog cov khoom siv tsis-ionic dej-soluble polymer uas tau los ntawm kev hloov kho tshuaj ntawm ntuj cellulose.Nws cov yam ntxwv tseem ceeb muaj xws li dej solubility zoo, ruaj khov viscosity hloov lub peev xwm, zoo heev zaj duab xis-tsim khoom thiab muaj zog thickening nyhuv.Cov yam ntxwv no ua rau HEC tseem ceeb hauv ntau hom kev lag luam, nrog rau cov xim, tshuaj ntxuav tes, tshuaj pleev ib ce, tshuaj, zaub mov thiab lwm yam.
Cov qauv tshuaj ntawm hydroxyethyl cellulose
Cov qauv yooj yim ntawm HEC yog cov saw hlau tsim los ntawm kev sib txuas ntawm β-D-glucose units ntawm cellulose los ntawm 1,4-glycosidic bonds.Cov pab pawg hydroxyethyl hloov ib feem ntawm pawg hydroxyl nyob rau hauv cellulose molecule, muab nws txhim kho solubility thiab physicochemical zog.Los ntawm kev kho cov qib ntawm kev hloov pauv thiab qhov hnyav molecular ntawm pawg hydroxyethyl, viscosity thiab solubility ntawm HEC tuaj yeem hloov kho, uas yog qhov tseem ceeb rau kev ua haujlwm zoo hauv kev siv sib txawv.
Lub luag haujlwm ntawm Hydroxyethyl Cellulose hauv Cov Tshuaj Txhuam Hniav
1. Thickening
Ib lub luag haujlwm tseem ceeb tshaj plaws ntawm HEC yog ua kom tuab.Hauv cov tshuaj pleev xim, HEC tuaj yeem ua kom cov viscosity ntawm cov tshuaj zoo.Cov nyhuv thickening no tuaj yeem tiv thaiv lub tshuab nqus tsev los ntawm kev ua haujlwm thaum siv, yog li txhim kho nws yooj yim ntawm kev siv thiab ua haujlwm zoo.Cov nyhuv thickening kuj tso cai rau lub tshuab ntxhua khaub ncaws los tsim cov txheej tuab ntawm cov kab ntsug lossis qhov chaw inclined, ua kom lub sijhawm ua haujlwm ntev thiab txhim kho cov nyhuv tu.
2. Stabilizing Suspensions
HEC kuj tseem siv los ua kom ruaj khov hauv cov xim pleev xim los pab tshem tawm cov khoom tsis zoo lossis cov khoom siv.Cov cuab yeej no tseem ceeb heev rau cov tshuab multiphase.HEC tuaj yeem tiv thaiv cov sedimentation ntawm cov khoom siv hauv lub tshuab ntxhua khaub ncaws, yog li ua kom muaj kev sib xyaw ua ke thiab ua kom huv si zoo ib yam.Qhov kev ruaj khov no tso siab rau cov qauv network tsim los ntawm HEC txhawm rau ntes thiab tshem tawm cov khoom hauv cov tshuaj.
3. Zaj duab xis tsim
HEC muaj cov cuab yeej ua yeeb yaj kiab zoo heev, uas tso cai rau tus neeg siv lub tshuab nqus tsev los tsim cov yeeb yaj kiab tiv thaiv ntawm qhov chaw tom qab siv.Cov yeeb yaj kiab no tuaj yeem tiv thaiv cov tshuaj ntxuav tes los ntawm evaporating los yog absorbed sai heev thaum lub sij hawm ntxuav, yog li ncua sij hawm ua hauj lwm thiab txhim kho cov nyhuv tu.Nyob rau tib lub sijhawm, cov cuab yeej ua yeeb yaj kiab tuaj yeem tiv thaiv qhov chaw ntxuav los ntawm kev sib kis thiab kev puas tsuaj.
4. Lubrication
Thaum lub sij hawm ntxuav, lub lubrication ntawm HEC pab txo cov neeg kho tshuab kev sib txhuam, uas yog ib qho tseem ceeb tshwj xeeb tshaj yog thaum ntxuav qhov chaw rhiab heev.Cov tshuaj colloidal tsim los ntawm kev sib cais ntawm HEC hauv dej tuaj yeem muab lubrication, txo qhov kev sib txhuam ntawm cov cuab yeej ntxuav thiab qhov chaw, thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj.
5. Synergist
HEC tuaj yeem ua haujlwm sib koom ua ke nrog lwm cov khoom xyaw txhawm rau txhim kho kev ua haujlwm tag nrho ntawm cov tshuaj ntxuav tes.Piv txwv li, HEC tuaj yeem txhim kho qhov kev faib tawm thiab kev ua haujlwm ntawm surfactants hauv cov tshuaj ntxuav tes, yog li txhim kho cov nyhuv tu.Tsis tas li ntawd, HEC tseem tuaj yeem cuam tshuam rau kev nthuav dav thiab nkag mus ntawm cov tshuaj ntxuav tes ntawm qhov chaw los ntawm kev kho cov rheology ntawm cov tshuaj, ntxiv dag zog rau nws cov peev xwm decontamination.
Yuav siv hydroxyethyl cellulose li cas
1. Cov txheej txheem tawg
Kev siv HEC hauv cov xim pleev xim feem ntau pib nrog kev tawg.Cov txheej txheem dissolution feem ntau yog maj mam ntxiv HEC hmoov rau dej hauv qab nplawm.Yuav kom tsis txhob agglomeration thiab xyuas kom meej dispersion, cov dej kub feem ntau yog tswj nyob rau hauv ib tug tej yam ntau yam.HEC dissolves los tsim cov kua nplaum pob tshab, uas lwm cov khoom xyaw tuaj yeem ntxiv ntxiv raws li xav tau.
2. Kev txiav txim ntxiv
Hauv kev tsim cov xim pleev xim, qhov kev txiav txim ntawm HEC ntxiv tuaj yeem cuam tshuam rau kev ua haujlwm ntawm cov khoom kawg.Nws yog feem ntau pom zoo kom ntxiv HEC tom qab cov khoom xyaw tseem ceeb yog yaj tag lossis sib tov sib npaug.Qhov no ua kom ntseeg tau tias HEC tuaj yeem ua tiav nws cov thickening thiab stabilizing cov teebmeem thaum txo cov kev tsis zoo nrog lwm cov khoom xyaw.
3. Kev tswj kom muaj zog
Qhov concentration ntawm HEC ncaj qha cuam tshuam rau viscosity thiab siv cov nyhuv ntawm cov tshuaj ntxuav.Los ntawm kev kho tus nqi ntawm HEC, qhov fluidity thiab sib xws ntawm lub tshuab nqus tsev tuaj yeem tswj tau kom ua tau raws li kev thov sib txawv.Feem ntau hais lus, qhov concentration ntawm HEC nyob rau hauv lub tshuab nqus tsev vacuum yog 0.1% mus rau 2%, nyob ntawm seb qhov yuav tsum tau muaj viscosity thiab formulation yuav tsum tau.
Qhov zoo ntawm hydroxyethyl cellulose
1. Kev nyab xeeb
Raws li cov khoom hloov kho ntawm natural cellulose, HEC muaj biocompatibility zoo thiab ib puag ncig tus phooj ywg.Kev siv HEC hauv cov xim pleev xim yuav tsis ua paug ib puag ncig lossis ua rau muaj kev phom sij rau cov neeg siv, ua rau HEC muaj kev nyab xeeb thiab tsis muaj tshuaj lom.
2. Kev ruaj ntseg
HEC qhia tau hais tias muaj kev ruaj ntseg zoo nyob rau hauv ntau yam ntawm pH thiab qhov kub thiab txias thiab tsis ua rau degradation lossis tsis ua haujlwm.Qhov kev ruaj ntseg no ua kom ntseeg tau tias lub tshuab nqus tsev tuaj yeem tswj tau qhov kev ua tau zoo nyob rau hauv qhov sib txawv cia thiab siv cov xwm txheej.
3. Kev lag luam
Tus nqi qis ntawm HEC kuj yog ib qho laj thawj rau nws daim ntawv thov dav.Vim nws qhov kev ua tau zoo heev thiab tus nqi qis, HEC tsis tsuas yog muab kev ua haujlwm zoo hauv cov tshuaj pleev ib ce, tab sis kuj muaj tus nqi siab.
Kev txwv ntawm Hydroxyethyl Cellulose
Txawm hais tias nws muaj ntau qhov zoo, HEC kuj tseem muaj qee qhov kev txwv hauv nws daim ntawv thov hauv cov xim pleev xim.Piv txwv li, HEC tej zaum yuav degrade nyob rau hauv tej yam muaj zog acid los yog alkaline tej yam kev mob, uas txwv nws siv nyob rau hauv tej yam tshwj xeeb formulations.Tsis tas li ntawd, cov txheej txheem tawg ntawm HEC yuav tsum tau ua tib zoo tswj kom tsis txhob agglomeration thiab uneven dispersion, txwv tsis pub nws yuav cuam tshuam rau kev ua haujlwm ntawm lub tshuab ntxhua khaub ncaws.
Kev Txhim Kho Yav Tom Ntej
Nrog rau kev nce qib ntawm kev siv thev naus laus zis thiab kev hloov pauv hauv kev thov, daim ntawv thov ntawm HEC hauv cov xim pleev xim tuaj yeem nthuav dav ntxiv.Kev tshawb fawb yav tom ntej tuaj yeem tsom mus rau cov hauv qab no:
Kev txhim kho kev ua haujlwm: Ntxiv rau kev txhim kho kev sib koom ua ke thiab kev ruaj ntseg ntawm HEC los ntawm kev hloov kho tshuaj lom neeg lossis kev sib xyaw nrog lwm cov ntaub ntawv.
Kev txhim kho ntsuab: Tsim kom muaj ib puag ncig zoo rau HEC cov txheej txheem tsim khoom kom txo tau qhov cuam tshuam rau ib puag ncig thaum txhim kho nws cov biodegradability.
Daim ntawv thov nthuav dav: Tshawb nrhiav daim ntawv thov HEC hauv ntau hom tshuaj ntxuav tes kom ua tau raws li kev xav tau sib txawv, tshwj xeeb tshaj yog nyob rau hauv kev xav tau kev lag luam tu.
Lub luag haujlwm ntawm hydroxyethyl cellulose hauv cov xim pleev xim tsis tuaj yeem tsis quav ntsej.Raws li cov thickener ua tau zoo, stabilizer thiab zaj duab xis qub, HEC ua haujlwm zoo ntawm cov tshuaj detergents thiab ua rau lawv ua tau zoo hauv ntau yam kev siv.Txawm hais tias muaj qee qhov kev txwv, HEC tseem muaj kev cia siab dav dav rau yav tom ntej los ntawm kev txhim kho kev txawj ntse thiab kev tshawb fawb ntawm daim ntawv thov.Raws li kev nyab xeeb, ruaj khov thiab kev lag luam ntxiv, HEC yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv thaj chaw ntawm cov xim pleev xim.
Post lub sij hawm: Jun-27-2024