Cellulose ethers yog cov khoom xyaw uas siv los tsim cov xim thiab cov txheej txheem xws li putty hmoov.Putty yog hmoov-raws li muab tub lim siv los sau qhov khoob, tawg thiab qhov hauv txhua qhov chaw.Cellulose ether txhim kho qhov zoo ntawm putty hmoov los ntawm kev txhim kho nws adhesion, cohesiveness thiab lwm yam khoom ntawm lub cev.Thaum xaiv cov cellulose ethers rau putty hmoov, yuav tsum tau ceev faj yuav tsum tau ua kom paub tseeb tias qhov ua tau zoo.
Muab cov lus qhia dav dav txog cov teeb meem uas yuav tsum tau them sai sai rau thaum xaiv cellulose ether rau cov hmoov putty.
Lus Cim # 1: Txiav txim seb hom cellulose ether xav tau
Muaj ntau hom cellulose ethers, suav nrog methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, thiab carboxymethylcellulose.Txhua hom cellulose ether muaj cov khoom tshwj xeeb uas ua rau nws tsim nyog rau cov ntawv thov tshwj xeeb.Yog li ntawd, ua ntej xaiv cellulose ether rau putty hmoov, nws yog ib qhov tsim nyog los txiav txim seb hom cellulose ether haum rau hom putty hmoov tsim.
Piv txwv li, hydroxyethyl cellulose (HEC) yog qhov zoo rau kev siv cov hmoov putty vim nws txhim kho cov khoom zoo ntawm cov hmoov putty.HEC thickens cov tshuaj, tiv thaiv sagging, thiab tsub kom lub viscosity ntawm putty hmoov.Methylcellulose, ntawm qhov tod tes, tsis haum rau kev siv cov hmoov putty vim nws tsis muaj tib lub thickening zog li HEC.
Lus Cim # 2: Txiav txim siab qib ntawm cellulose ether xav tau
Cellulose ethers muaj nyob rau hauv ntau qib nyob ntawm purity thiab concentration.Lub hom ntawm cellulose ether yuav tsum tau rau putty hmoov yuav tsum tau txiav txim raws li qhov yuav tsum tau ntawm putty hmoov.
High-purity qib ntawm cellulose ethers yog nyiam dua qib qis cellulose ethers vim lawv ua kom zoo ib yam ntawm cov hmoov putty.High-purity cellulose ether tsis muaj tshauv, residue thiab lwm yam impurities uas cuam tshuam qhov zoo ntawm putty hmoov.
Lus Cim # 3: Ntsuas Solubility ntawm Cellulose Ethers
Cellulose ethers yog soluble hauv dej, tab sis qib ntawm solubility txawv nyob ntawm seb hom cellulose ether.Hydroxypropylcellulose (HPC) yog ib qho piv txwv ntawm cellulose ether uas yog insoluble hauv dej;xwb, nws disperses yooj yim hauv dej.
Nws yog ib qho tseem ceeb los txiav txim siab qhov solubility ntawm cellulose ether siv hauv cov hmoov putty kom ntseeg tau tias nws dissolves yooj yim hauv dej thiab tsis ua rau muaj kev sib txuam lossis tsis sib xws hauv cov hmoov putty.
Lus Cim # 4: Xav txog qhov ntsuas kub ntawm daim ntawv thov
Kev tsim kho kub ntawm putty hmoov cellulose ether kuj yog ib qho tseem ceeb rau kev txiav txim siab.Txhua hom cellulose ether muaj qhov ntsuas kub tshwj xeeb uas nws ua haujlwm zoo tshaj plaws.Yog li ntawd, nws yog ib qho tseem ceeb los xaiv cov cellulose ethers uas tuaj yeem tiv taus qhov kub thiab txias ntawm putty hmoov.
Cellulose ether muaj thermal stability zoo thiab tsim nyog siv rau hauv cov hmoov putty vim nws yuav tsis degrade los yog poob ntawm qhov kub thiab txias.Hydroxypropyl methylcellulose (HPMC) yog ib qho piv txwv ntawm cellulose ether uas yog thermally ruaj khov thiab ua haujlwm zoo hauv cov hmoov putty.
Ceeb Toom #5: Ntsuas Cov Cai Cia
Cellulose ethers yog rhiab heev rau kev hloov ntawm qhov kub thiab txias;yog li ntawd, lawv yuav tsum tau muab cia rau hauv tej yam kev mob tshwj xeeb kom tsis txhob degradation.Cellulose ethers yuav tsum tau muab cia rau hauv qhov chaw qhuav nrog kev tswj kub thiab av noo kom ntseeg tau tias lawv ruaj khov.
Stabilized cellulose ethers txhim kho qhov zoo ntawm cov hmoov putty, ua kom nws zoo ib yam, ruaj thiab siv tau zoo.
Kev ceev faj #6: Ua raws li kev ceev faj txog kev nyab xeeb
Thaum lub sijhawm tsim khoom, yuav tsum tau ceev faj kom tsis txhob muaj cov neeg ua haujlwm raug rau cellulose ethers.Thaum tuav cov cellulose ethers, nws yog ib qho tseem ceeb uas yuav tsum hnav cov cuab yeej tiv thaiv xws li hnab looj tes, tsom iav, thiab daim npog ntsej muag kom tsis txhob muaj kev sib cuag nrog daim tawv nqaij, qhov muag, lossis ua pa.
Tsis tas li ntawd, nws yog ib qho tseem ceeb rau cov ntawv ntim cov thawv uas muaj cellulose ethers nrog cov cim ceeb toom tsim nyog thiab ua raws li cov txheej txheem pov tseg kom tsis txhob muaj kev sib kis ntawm ib puag ncig.
nyob rau hauv xaus
Xaiv txoj cai cellulose ether rau putty hmoov yog qhov tseem ceeb heev kom tau txais txiaj ntsig zoo.Kev ceev faj yuav tsum tau ua thaum txiav txim siab txog hom thiab qib ntawm cellulose ether xav tau, ntsuas nws cov solubility thiab thermal stability, ua raws li kev cia khoom kom zoo, thiab ua raws li kev ceev faj txog kev nyab xeeb.
Ua raws li cov kev ceev faj no tsis tsuas yog ua kom zoo ntawm cov hmoov putty, tab sis kuj tiv thaiv cov neeg ua haujlwm thiab ib puag ncig.Siv txoj cai cellulose ethers, putty hmoov tuaj yeem tsim muaj kev nyab xeeb thiab ua tau zoo kom tau raws li cov neeg siv khoom xav tau kom zoo thiab sib xws.
Post lub sij hawm: Sep-12-2023