HPMC (HydroxyPropyyl methylulose) yog ib feem siv molecular siv molecular feem ntau siv nyob rau hauv cov ntaub ntawv hauv tsev, tshuaj, khoom noj khoom haus, tshuaj pleev ib ce, cov tshuaj pleev ib ce thiab lwm thaj teb. Raws li cov nplaum, HPMC tau siv dav rau nws txoj kev sib cog lus zoo, cov dej solubility, thickening thiab ruaj khov. Txawm li cas los xij, hauv cov ntawv thov siv tau, txhawm rau txhim kho kev ua tau zoo ntawm cov nplaum, tshwj xeeb tshaj yog cov kev ntsuas thiab kev cob qha txhais tau tias yuav tsum tau ua.
1. Cov yam ntxwv ntawm HPMC
HPMC yog lub cellulose ether ua los ntawm cov xov tooj ntawm lub cev los ntawm kev hloov kho tshuaj. Nws cov qauv molecular muaj cov pab pawg hydroxyl thiab methoxy pab pawg, uas muab nws ua kom zoo solubility thiab ua yeeb yaj kiab ua yeeb yam. Hauv cov qauv nplaum nplaum, cov nyhuv tuab ntawm HPMC ua kom nws nce viscosity ntawm kev daws teeb meem thiab ua cov yeeb yaj kiab tuab los txhim kho lub zog uas muaj zog. HPMC kuj muaj cov dej ua tau zoo heev, uas ua rau nws ua kom muaj kev ua tau zoo rau hauv ib puag ncig huab cua, muaj ncua sij hawm ua haujlwm ntawm cov nplaum.
2. Qhov xav tau ntawm kev txhim kho kev ruaj ntseg ntawm HPMC
Thaum siv cov nplaum nplaum, kev ruaj khov yog ib qho tseem ceeb ntawm qhov cuam tshuam rau nws cov txiaj ntsig zoo. Tsis muaj zog ntawm cov nplaum yuav ua rau viscosity hloov, strimation, stratification hloov, stratification thiab lwm yam teeb meem, yog cuam tshuam rau kev ua tau zoo thiab ruaj khov ntawm cov khoom. Yog li ntawd, yuav ua li cas txhawm rau txhim kho qhov ruaj khov ntawm HPMC ua cov nplaum yog tus yuam sij los xyuas kom meej tias nws tuaj yeem txuas ntxiv ua haujlwm hauv cov chaw sib txawv.
3. Txoj kev txhawm rau txhim kho kev ruaj ntseg ntawm HPMC cov nplaum
3.1 Tswj txoj kev faib tawm Molecular
Lub cev hnyav molecular ntawm HPMC muaj qhov cuam tshuam tseem ceeb rau nws solubility, cov nyhuv tuab thiab ruaj khov hauv dej. Los ntawm kev tswj cov roj ntsha hnyav ntawm HPMC, nws viscosity thiab cov yeeb yaj kiab-tsim cov khoom tuaj yeem hloov kho. Qhov hnyav dua molecular zoo li yuav muab viscosity ntau dua thiab muaj zog sib haum zog, tab sis tej zaum yuav ua rau muaj kev nyuaj ua ke thiab tsis muaj peev xwm ua rau muaj kev sib cais. Yog li ntawd, nws yog ib qho tsim nyog los xaiv qhov hnyav molecular hnyav ntau raws li cov ntaub ntawv tshwj xeeb kom haum rau kev ua tau zoo thiab kev ruaj ntseg ntawm cov nplaum.
3.2 Txhim kho cov tshuaj
Hauv cov qauv, HPMC feem ntau yog siv ua ke nrog lwm cov khoom xyaw, fashers, fillers, hla-txuas cov neeg sawv cev thiab cov tshuaj tiv thaiv. Los ntawm tsim nyog txuam cov khoom xyaw no, qhov ruaj khov ntawm HPMC cov nplaum muaj peev xwm txhim kho. Piv txwv li:
Xaiv cov tshuab roj hmab: cov cuab yeej tsim nyog tuaj yeem hloov kho cov nplaum HPMC kom txo tau los ntawm kev sib tsoo thaum lub sijhawm ua kom qhuav.
Xaiv cov fillers: Fitters ua si ib qho kev sau thiab txhawb txoj haujlwm hauv cov nplaum, tab sis ntau dhau los ua rau cov lim dej uas muaj ntau dhau los ua rau muaj teeb meem lossis nag lossis daus. Kev xaiv tsim nyog thiab tswj ntawm tus nqi ntawm cov neeg muab ua haujlwm yuav pab txhim kho kev ruaj ntseg ntawm lub system.
Txuas ntxiv ntawm cov neeg sawv cev sib txuas lus: Cov neeg sawv cev tsim nyog hla tebchaws HPMC thiab muaj zog ntawm kev txo qis vim yog hloov pauv hloov pauv) thaum siv.
3.3 Hloov kho ntawm kev daws teeb meem ruaj khov
HPMC muaj solubility zoo nyob hauv dej, tab sis ntevht ntawm cov kev daws teeb meem yuav ua rau muaj teeb meem ruaj khov, xws li kev teeb meem thiab viscosity txo. Txhawm rau txhim kho kev ruaj ntseg ntawm HPMC daws, ntsuas hauv qab no tuaj yeem coj:
Kho P yeej: HPMC muaj kev ruaj khov zoo nyob hauv nruab nrab rau qhov tsis muaj zog alkaline ib puag ncig. Tsawg dhau los yog PH tus nqi dhau yuav ua rau nws cov qauv molecular kom ua rau muaj kev txwv lossis lub cev kom txo qis. Yog li, tus lej tus nqi ntawm kev daws teeb meem yuav tsum cia siab nyob nruab nrab ntawm 6-8 nyob rau hauv cov mis.
Kev siv tshuaj tiv thaiv: HPMC aqueous kev daws teeb meem yuav raug rau microbial ntxeem tau, ua rau tsis zoo, pwm thiab lwm yam teeb meem. Los ntawm kev ntxiv tus nqi tsim nyog (xws li sodium benzoate lossis poov tshuaj sorbate), lub sijhawm cia
Tswj kev kub: Qhov kub thiab muaj qhov tseem ceeb ntawm kev ruaj ntseg ntawm HPMC tov. Cov kev kub siab dua tuaj yeem ua kom nrawm dua ntawm HPMC, ua rau muaj kev txo qis hauv viscosity. Yog li ntawd, thaum lub sij hawm cia thiab siv, nws yuav tsum zam tsis txhob kis tau los ntawm kev kis tau kom muaj kev kub siab ib puag ncig kom tswj nws qhov kev ruaj khov zoo.
3.4 Txhim kho cov khoom tiv thaiv los tiv thaiv kev laus
Thaum siv sijhawm ntev, cov nplaum yuav muaj hnub nyoog vim yog lub teeb xws li lub teeb, oxygen, thiab kub nyob rau ib puag ncig. Txhawm rau txhim kho cov khoom tiv thaiv kev laus ntawm HPMC cov nplaum, ntsuas hauv qab no tuaj yeem ua:
Ntxiv cov tshuaj tua kab mob tshuaj tua kab mob: antioxidants tuaj yeem ncua cov txheej txheem HPMC thiab tswj hwm nws txoj kev ruaj ntseg ntev.
Anti-ultraviolet ntxiv: nyob rau hauv ib puag ncig nrog lub teeb muaj zog, ultraviolet rays tej zaum yuav ua rau breakage ntawm hpmc molecular chains, yog li txo nws txoj kev ua tiav. Los ntawm kev ntxiv tus nqi tsim nyog ntawm anti-ultraviolet cov neeg sawv cev, kev tawm tsam kev laus ntawm HPMC tuaj yeem hloov kho tau zoo.
Kev sib txuas hla kev sib txuas: Tshuaj hla kev sib txuas tuaj yeem txhim kho cov qauv hluav taws xob hauv HPMC, yog li txhim kho nws cov cua sov, lub teeb tiv taus thiab antioxidant muaj peev xwm thiab antioxidant muaj peev xwm.
3.5 Daim ntawv thov ntawm Surfactants
Hauv qee kis, txhawm rau txhim kho kev ruaj khov thiab rheological cov yam ntxwv ntawm HPMC cov nplaum, muaj txiaj ntsig zoo ntawm surfactants tuaj yeem ntxiv. Surfactants tuaj yeem txhim kho kev sib cais thiab kev sib xyaw ntawm HPMC los ntawm kev txo cov kev daws teeb meem ntawm kev daws teeb meem, thiab tiv thaiv nws los ntawm agglomerating lossis tawm tsam thaum siv. Tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus siab cov ntsiab lus, kev siv hluav taws xob ntawm surfactants tuaj yeem txhim kho cov kev ua tau zoo thiab kev ruaj khov ntawm cov nplaum.
3.6 qhia txog nanomaterials
Nyob rau hauv xyoo tsis ntev los no, Nanotechnology tau ua tiav tau zoo hauv kev txhim kho cov khoom siv tau. Cov lus qhia ntawm nanomaterials, xws li nano-silicon Dioxide thiab nano-zinc oxide tuaj yeem txhim kho lawv cov tshuaj tua kab mob thiab cov khoom muaj zog. Cov Nanomaterials tsis tuaj yeem txhim kho lub cev lub cev ntawm cov nplaum, tab sis tseem ntxiv txhim kho kev ruaj ntseg tag nrho ntawm HPMC los ntawm lawv cov teebmeem sib txawv ntawm lawv cov teebmeem.
Raws li cov nplaum, HPMC tau siv dav hauv ntau qhov kev lag luam vim nws qhov kev ua tau zoo heev. Txawm li cas los xij, txhim kho nws txoj kev ruaj khov yog tus yuam sij los xyuas kom meej tias nws tuaj yeem txuas ntxiv ua lub luag haujlwm hauv qab kev thov kev sib haum xeeb. Los ntawm kev tswj hwm tsim nyog ntawm cov roj ntsha hnyav, kev txhim kho ntawm HPMC cov nplaum muaj peev xwm txhim kho, kom nws tuaj yeem tswj kev ua kom zoo nyob hauv ib puag ncig. Nyob rau hauv lub neej yav tom ntej, nrog kev txhim kho txuas ntxiv thiab tsim kho tshiab ntawm HPMC yuav nthuav dav, thiab nws daim ntawv thov hauv cov nplaum ntawm cov nplaum nplaum tseem yuav muaj ntau yam sib txawv.
Lub Sijhawm Post: Feb-17-2025