HydroxyPropyyl methylcellose (HPMC) yog ib qho kev siv ntawm cov khoom siv viscosity, feem ntau yog siv los kho lub viscosity, feem ntau yog siv los kho lub viscosity, feem ruaj khov thiab rheological cov khoom ntawm cov khoom. Nrog rau cov neeg siv khoom nce ntxiv rau cov khoom lag luam tu thiab ib puag ncig tu, lub luag haujlwm ntawm HPMC hauv viscosity tswj tau dhau los ua ntau dua thiab tseem ceeb dua. Txawm li cas los xij, yuav ua li cas zoo los txhim kho lub viscosity tswj ntawm hpmc hauv kev ua haujlwm ntxuav thiab ua kom cov khoom lag luam tsim nyog ntawm kev kawm tob.
(1) Cov yam ntxwv yooj yim ntawm HPMC
HPMC yog dej-soluble tsis muaj tseeb ntawm ether nrog zoo thickening, zaj duab xis, kev sib sau ua ke, ncua kev ua haujlwm rau lubrication. Nws cov qauv molecular muaj cov pab pawg hydroxypropyl thiab methyl pawg, uas muab nws zoo solubility thiab ruaj khov. Tom qab HPMC yws hauv dej, nws ua cov tshuaj colloidal colloidal, uas tuaj yeem ua kom cov dej nag ntawm cov khoom siv, yog li ua si ruaj khov.
Hauv kev ntxuav cov khoom, HPMC yog siv los ua cov tuab thiab viscosity realulator. Nws tuaj yeem muab cov khoom ntxuav tu kom haum, kom lawv muaj cov txheej thiab lub sijhawm zoo thaum siv. Tsis tas li ntawd, HPMC muaj cov ntsev tsis kam thiab qhov kub thiab txias, thiab haum rau cov khoom huv, thiab tshuaj ntxuav tes, tshuaj ntxuav tes, thiab lwm yam.
(2) Daim ntawv thov kev thov ntawm HPMC hauv kev ntxuav khoom
Thickening cov nyhuv: HPMC cov ntaub ntawv ib txoj kev hydrogen sib txuas network hauv theem kom muaj viscosity ntawm kev daws teeb meem, ua cov khoom ntxuav kom huv tau zoo dua thiab ruaj khov. Piv txwv li, hauv kev ua haujlwm hauv ncoo, HPMC tuaj yeem txhim kho kev sib xws ntawm cov khoom kom tiv thaiv nws los ntawm kev ua kom huv thiab cuam tshuam cov nyhuv huv. Nyob rau tib lub sijhawm, nws kuj tseem tuaj yeem txhim kho qhov tsis txaus siab ntawm cov tshuaj ntxuav thiab ua kom nws cov kev sib cais hauv cov dej sib txawv ntau dua.
Rheological tswj: HPMC tuaj yeem hloov kho cov khoom siv ntxuav, uas yog, kev coj tus cwj pwm thiab deformation tus cwj pwm ntawm cov khoom nyob hauv cov khoom sib txawv. Cov khoom siv hluav taws xob tsim nyog tsis yog cuam tshuam rau cov khoom lag luam cov neeg siv, tab sis kuj cuam tshuam rau qhov ruaj khov ntawm cov khoom thaum khaws cia. Piv txwv li, HPMC tuaj yeem ua kom cov tshuaj ntxuav tes ntawm cov viscosity uas tsim nyog ntawm qhov kub kub kom tiv thaiv nws los ntawm kev nyias lossis agglomerating.
Kev ncua thiab stability nyhuv: hauv cov khoom siv ntxuav khoom muaj cov khoom muaj zog, HPMC tuaj yeem tiv thaiv cov khoom los ntawm cov khoom lag luam thaum lub sijhawm khaws cia ntev. Piv txwv li, xab npum yuav muaj abrasives lossis microparticts. HPMC nce qhov kev viscosity ntawm cov kab mob viscosity los xyuas kom meej tias cov khoom siv no tau raug tshem tawm hauv cov kua thiab tiv thaiv lawv los ntawm kev tswm hauv qab ntawm lub raj mis.
(3) cov kev sib tw hauv HPMC viscosity tswj
Txawm hais tias HPMC muaj qhov tseem ceeb hauv viscosity tswj, tseem muaj qee qhov kev sib tw hauv cov ntawv thov kev siv, feem ntau yog hauv cov hauv qab no:
Cov nyhuv ntawm cov kub sib txawv ntawm viscosity: HPMC puas rhiab rau qhov kub thiab txias, thiab nws qhov kub thiab txias, uas yuav ua rau txo qis hauv qee qhov kev thov hauv qee qhov kev thov. Piv txwv li, nyob rau hauv ib puag ncig kub nyob rau lub caij ntuj sov, lub xab npum yuav txo qis, cuam tshuam rau cov nyhuv siv.
Cov nyhuv ntawm iionic lub zog ntawm viscosity: txawm hais tias HPMC muaj qhov muaj zog ntawm HPMC muaj zog, xws li ntxhua khaub ncaws electrolytes, xws li ntxuav hmoov thiab ntxhua khaub ncaws. Hauv qhov no, lub peev xwm thickening ntawm HPMC yuav txwv, ua rau nws nyuaj los tswj viscosity ruaj ntawm cov khoom.
Viscosity hloov thaum lub sijhawm khaws cia ntev: Thaum lub sijhawm khaws cia, lub viscosity ntawm cov xwm txheej ntawm qhov loj thiab vaum hloov. Kev hloov pauv hauv viscosity yuav ua rau txo qis hauv cov khoom ruaj khov thiab tseem cuam tshuam nws cov nyhuv tu thiab cov neeg siv kev paub.
(4) Cov tswv yim los txhim kho lub viscosity tswj ntawm hpmc
Txhawm rau txhim kho lub viscosity tswj ntawm hpmc hauv kev ntsuas ntxuav, los ntawm kev tsim kho cov qauv molecular ntawm HPMC los kho lwm yam khoom xyaw hauv cov mis.
1. Ua kom zoo rau cov qauv molecular ntawm HPMC
Lub viscos ntawm HPMC yog ze ze rau nws cov molecular hnyav thiab qib hloov chaw (qib siab hloov chaw ntawm methyl thiab hydroxyproprodyl pawg). Los ntawm xaiv HPMC nrog qhov hnyav molecular thiab cov degrees hloov chaw, nws cov nyhuv tuab rau hauv cov khoom sib txawv tuaj yeem kho tau. Piv txwv li, xaiv HPMC nrog qhov hnyav molecular hnyav tuaj yeem txhim kho nws cov viscosity stability thaum lub caij ntuj sov lossis qhov kub kub ib puag ncig. Ib qho ntxiv, los ntawm kev kho cov qib ntawm kev hloov pauv, cov ntsev tsis kam ntawm HPMC tuaj yeem ua kom zoo dua, yog li nws tswj cov viscosity hauv cov khoom lag luam muaj electrolytes.
2. Siv cov compound thickening system
Hauv kev siv cov kev siv, HPMC tuaj yeem sib txuas nrog lwm cov thickeners kom txhim kho nws cov nyhuv tuab thiab ruaj khov. Piv txwv li, siv HPMC nrog lwm cov tuab xws li xanthan ntawm cov pos hniav thiab cov kab ke zoo dua tuaj yeem ua tiav qhov chaw kub zoo dua, PT qhov muaj nuj nqis thiab ionic zog.
3. Ntxiv cov khoom siv solubilizers lossis stabilizers
Muaj qee kis, cov socility thiab ruaj khov ntawm HPMC tuaj yeem txhim kho los ntawm kev ntxiv cov khoom siv solubilizers lossis stabilizers rau cov mis. Piv txwv li, ntxiv surfactants lossis solubilizers tuaj yeem txhim kho kev sib cais ntawm HPMC hauv dej, cia nws ua kom muaj kev ua kom tuab dua. Tsis tas li ntawd, ntxiv cov stabilizers xws li ethanol lossis cov tshuaj tiv thaiv tuaj yeem txo qhov kev cuam tshuam ntawm HPMC thaum cia thiab tswj cov viscosity ntev.
4. Tswj cov kev tsim khoom thiab chaw cia khoom
Lub viscos ntawm HPMC yog nkag siab txog qhov kub thiab cov av noo, kom ib puag ncig yuav tsum tau tswj kom ntau li ntau tau thaum muaj peev xwm ua tau thiab cia. Piv txwv li, thaum tswj cov txheej txheem ntau lawm, los ntawm kev tswj qhov kub thiab cov av noo, nws tuaj yeem ua kom tau kom tsis txhob muaj qhov tsis txaus ntseeg kom tsis txhob muaj qhov tsis txaus siab los ntawm ib puag ncig. Thaum lub sij hawm cia theem, tshwj xeeb tshaj yog nyob rau hauv kub siab, cov khoom yuav tsum zam ntawm kev nthuav tawm ib puag ncig loj los tiv thaiv kev cuam tshuam los ntawm cov khoom zoo.
5. Kev Tsim Kho Tshiab HPMC Derivatives Tshiab
Los ntawm kev kho mob chemifying HPMC thiab kev tsim cov derivatives tshiab HPMC, nws Viscosity tswj kev ua tau ntxiv tau ntxiv. Piv txwv li, txhim kho HPMC derivatives nrog lub zog hluav taws xob muaj zog thiab electrolyte kev yuav zoo ntsib cov khoom lag luam tu cov khoom lag luam. Ib qho ntxiv, kev txhim kho ntawm ib puag ncig phooj ywg thiab biodegradable hpmc derivatives yuav tseem yuav pab txhim kho kev ua haujlwm ib puag ncig ntawm kev ntxuav cov khoom lag luam thiab ua raws li cov txheej txheem tam sim no ntawm cov tshuaj ntsuab.
Raws li qhov tuab tuab thiab viscosity maub los, HPMC muaj qhov dav kev cia siab hauv cov khoom ntxuav. Txawm li cas los xij, vim nws qhov rhiab rau ib puag ncig cov khoom xws li ib puag ncig thiab ionic zog, kev sib tw hauv HPMC viscosity tswj tseem muaj nyob muaj. By optimizing the molecular structure of HPMC, using a compound thickening system, adding solubilizers or stabilizers, and controlling production and storage conditions, the viscosity control performance of HPMC in cleaning products can be effectively improved. Nyob rau tib lub sijhawm, nrog rau kev txhim kho ntawm New HPMC derivatives, viscosity tswj kev tu cov khoom hauv lub neej yav tom ntej yuav ua tau zoo thiab cov neeg siv kev paub ntawm cov khoom huv.
Lub Sijhawm Post: Feb-17-2025