HPMC (HydroxyPropyyl methylcellulose) yog cov khoom siv tshuaj lom ntau ntau) yog cov khoom siv tseem ceeb hauv ntau qhov kev siv lag luam. Nws yog tsis-ionic, ib nrab ntawm cellulose ete nrog ntau yam tshuaj, yog li cov tshuaj, khoom noj khoom haus, thiab lwm yam siv.
(1) Cov yam ntxwv ntawm HPMC
Ua ntej sib tham txog nws cov ntawv thov kev lag luam, nws yog qhov tsim nyog kom nkag siab cov yam ntxwv tseem ceeb ntawm HPMC. Cov hauv qab no yog qee cov khoom siv lub cev tseem ceeb thiab tshuaj lom neeg ntawm HPMC:
Thickening: HPMC tuaj yeem ua kom cov viscosity ntawm cov kua roj, tshwj xeeb tshaj yog nyob rau hauv cov tshuab dej-raws. Qhov no ua rau nws muaj txiaj ntsig zoo li tus neeg sawv cev tuab ntawm ntau cov ntawv thov, tshwj xeeb hauv cov ntaub ntawv tsim.
Zaj duab xis-ua cov khoom: HPMC muaj cov yeeb yaj kiab zoo nkauj thiab muaj peev xwm ua cov yeeb yaj kiab thiab pob tshab. Nws feem ntau siv nyob rau hauv txheej thiab tshuaj lag luam.
Dej khaws cia: HPMC tuaj yeem txo cov dej poob thiab ncua dej evaporation. Nws yog feem ntau siv los tswj cov dej noo ntawm cov ntaub ntawv hauv kev tsim kho thiab cov khoom noj.
Thermal gelability: HPMC cov ntaub ntawv gel ntawm cov kub tshwj xeeb thiab yog siv dav hauv cov zaub mov thiab tshuaj lag luam.
Stability: HPMC tiv taus rau cov kua qaub thiab cov alkalis thiab tseem nyob ruaj khov nyob rau hauv cov dav xov ntau, yog li nws tuaj yeem hloov kho ntau yam ib puag ncig kev lag luam.
(2) daim ntawv thov ntawm HPMC hauv ntau thaj teb muaj
1. Kev lag luam kev tsim kho
HPMC feem ntau siv hauv kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv cov hmoov qhuav, nplais nplaum, sab nrauv phab ntsa rwb thaiv tsev tshuab thiab cov khoom siv dej. Daim ntaub ntawv tshwj xeeb suav nrog:
Qhuav cug: hpmc tuaj yeem thicken, khaws dej thiab txhim kho kev tsim kho hauv cov tshuaj khib. Nws cov dej-khaws cov khoom siv kom cov Maas slurry kom ua tiav cov dej noo thaum lub sijhawm ua tiav, yog li kev txhim kho lub zog ntawm lub tshuaj khib. Tsis tas li ntawd, HPMC tuaj yeem txhim kho cov viscosity ntawm cug, txo cug coll tollage, thiab txhim kho kev ua haujlwm tau zoo.
Pobzeb nplaum: Lub zog ntawm lub zog ntawm cov nplais nplaum yog qhov tseem ceeb rau cov nplais nplais ruaj khov. Kev sib cog lus thiab cov dej tuav tseg ntawm HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov vuas nplaum, ntxiv cov hmoov av thaum tsim khoom, thiab tiv thaiv kev dai ua si.
Putty hmoov thiab sab nrauv phab ntsa rwb thaiv tsev ua haujlwm: nyob rau sab nrauv phab ntsa, txhim kho cov khoom siv tiv thaiv dej, txhim kho cov khoom siv los tiv thaiv kev ua haujlwm, thiab xyuas kom zoo.
2. Kev lag luam kev lag luam
Hauv kev lag luam kws tshuaj, HPMC feem ntau siv cov kws tshuaj zoo ib yam, tshwj xeeb tshaj yog nyob rau hauv kev npaj khoom thiab tso tawm kev npaj. Cov ntawv thov tseem ceeb muaj xws li:
Cov txheej yeeb tshuaj: HPMC, raws li tus neeg tsis nyiam ua yeeb yaj kiab, tuaj yeem tsim cov tshuaj tiv thaiv kom yooj yim thiab tiv thaiv cov tshuaj los ntawm ib puag ncig. Ib qho ntxiv, nws tuaj yeem tswj tso cov tshuaj tso tawm thiab ntev ntev lawv ua tau zoo.
Kev txhawb nqa kev tsim qauv: Cov teeb meem loj ntawm HPMC tso cai rau nws los ua lub luag haujlwm tseem ceeb hauv kev tso tawm-tso tawm. Los ntawm o thiab sib sau cov gel hauv txoj hnyuv, nws tuaj yeem tswj cov tshuaj tso tawm tshuaj thiab tsis txhob muaj kev mob tshwm sim los ntawm kev nqus cov tshuaj sai.
3. Kev lag luam khoom noj khoom haus
HPMC yog siv los ua cov thickener, emulsifier thiab stabilizer nyob hauv kev lag luam khoom noj. Nws txoj kev nyab xeeb tau pom dav dav los ntawm cov chaw ua haujlwm nyab xeeb khoom noj thoob ntiaj teb. Daim ntaub ntawv tshwj xeeb suav nrog:
Khoom Noj Ntxiv: HPMC tuaj yeem siv ua emulsifier, thickener thiab lwm yam khoom los txhim kho cov qauv thiab saj ntawm cov khoom noj.
Cov Khoom Noj Tsawg-Calorie: HPMC yog cov khoom muaj roj tsawg uas tuaj yeem hloov cov khoom noj muaj roj hauv zaub mov thiab cov khoom siv dej noo thiab cov khoom poob phaus.
4. Cov txheej txheem thiab xim av
HPMC tau dav siv nyob rau hauv cov xim thiab pleev xim kev lag luam ua cov tuab tuab, stabilizer thiab zaj duab xis thiab zaj duab xis-ua tus neeg sawv cev. Cov txiaj ntsig tshwj xeeb suav nrog:
Zaj duab xis ua yeeb yam: HPMC tuaj yeem tsim ib zaj yeeb yaj kiab tiv thaiv ruaj khov los txhim kho cov dej tsis kam thiab ua tsis taus ntawm cov txheej.
Txhim kho cov kev sib txuam ntawm cov txheej txheem: cov khoom siv thickening ntawm HPMC ua kom nws tswj tau zoo rau cov txheej txheej, zam kev sagging, thiab txhim kho cov txheej txheej.
5. Cov khoom lag luam txhua hnub
Ntawm cov tshuaj txhua hnub, HPMC feem ntau siv nyob rau hauv cov tshuaj txhuam hniav, zawv plaub hau, tawv tu cov khoom lag luam thiab lwm yam ntaub ua cov neeg ua yeeb yaj kiab thiab ua yeeb yaj kiab. Nws lub luag haujlwm hauv cov tshuaj pleev ib ce tsis yog tsuas yog txhim kho qhov kev xav ntawm cov khoom, tab sis kuj yuav muab cov yeeb yaj kiab tiv thaiv rau cov tawv nqaij kom tiv thaiv kev ya raws poob.
(3) Yuav ua li cas zoo siv HPMC hauv kev siv cov kev siv
Txawm hais tias HPMC yog haib thiab dav siv HPMC hauv cov ntawv teev kev lag luam sib txawv, koj yuav tsum tau pib los ntawm cov hauv qab no:
Xaiv lub npe HPMC tshwj xeeb
HPMC muaj ntau yam kev qhia tshwj xeeb raws li cov degree hloov chaw thiab hnyav hnyav. HPMC ntawm cov kev sib txawv muaj cov yam ntxwv sib txawv xws li solubility, viscosity, thiab gel kub. Hauv cov ntawv thov tshwj xeeb, cov lus qhia tsim nyog tshaj plaws yuav tsum raug xaiv raws cov txheej txheem tseev kom muaj. Piv txwv li, hauv cov txheej txheem nrog cov viscosity siab, HPMC nrog siab molecular hnyav thiab siab viscosity yuav tsum tau xaiv; Thaum nyob rau hauv cov txheej txheem txheej txheem tshuaj, HPMC ntau yam nrog qis dua gel kub yuav tsum tau xaiv.
Tswj tus nqi ntxiv
Kev siv tus nqi ntawm HPMC ncaj qha cuam tshuam rau kev ua tau zoo ntawm cov khoom. Tus nqi ntawm HPMC tsim nyog tuaj yeem txhim kho cov khoom lag luam, tab sis ntau dhau los yuav ua rau viscosity heev thiab cuam tshuam kev tsim kho. Nyob ntawm daim ntawv thov teb, tus nqi ntawm HPMC ib txwm muaj li 0.1% thiab 2%. Qhov zoo ntxiv ntxiv tus nqi yuav tsum tau txiav txim siab raws li kev sim kom ua tiav cov nyhuv xav tau.
Txoj Kev Sib Tham
Qhov kawg ntawm HPMC hauv dej cuam tshuam los ntawm qhov kub, shear zog thiab lub sijhawm. Txhawm rau kom yaj HPMC, feem ntau nws pom zoo kom tawg nws hauv dej txias ua ntej, thiab tom qab ntawd maj mam ua kom sov nws kom yaj tag. Zam tsis txhob ntxiv HPMC ncaj qha ntawm qhov kub los tiv thaiv kev tsim ntawm cov hnab pob gel.
Synergy nrog lwm cov khoom sib ntxiv
HPMC feem ntau siv ua ke nrog lwm cov tshuaj ntxiv xws li cov tshuab yas thiab hla kev sib txuas ua ke los txhim kho cov khoom lag luam tag nrho ntawm cov khoom lag luam. Ntawm cov ntaub ntawv hauv tsev, HPMC ua ke nrog cov cawv polyvinyllin, Starch ether, etc. tuaj yeem txhim kho qhov sib xyaw thiab tawg ua haujlwm ntawm cug.
HPMC tau siv dav hauv kev tsim kho, tshuaj, khoom noj, tsho tshaj thiab lwm yam kev lag luam vim nws lub cev nqaij daim tawv thiab tshuaj lom neeg. Hauv kev siv cov kev thov, los ntawm kev xaiv cov lus qhia tsim nyog, ua rau muaj kev sib ntxiv ntawm HPMC tuaj yeem hloov kho, yog li txo cov nqi thiab txhim kho cov khoom lag luam zoo thiab ua tau zoo.
Lub Sijhawm Post: Feb-17-2025