HydroxyPropyyl Metylcellulose (HPMC) yog qhov txuas ntxiv nyob rau hauv ntau yam kev lag luam suav nrog kev tsim kho vim yog rau nws cov kev ua haujlwm ntau. Nyob rau hauv daim teb ntawm putty ntau lawm, HPMC ua si tseem ceeb hauv kev txhim kho cov khoom xws li kev tsim kho, nplaum, dej tsis kam.
Putty yog cov khoom siv ntau yam uas tau siv nyob rau hauv kev tsim kho hauv kev sib tsoo, qib chaw thiab muab cov chaw du rau phab ntsa thiab qab nthab. Kev ua yeeb yam ntawm putty yog qhov tseem ceeb kom ua tiav cov txiaj ntsig xav tau hauv kev tsim kho cov dej num, yog li cov ntxiv siv los txhim kho nws cov khoom. HydroxyPropyyl methylcellose (HPMC) tau dhau los ua cov khoom tseem ceeb rau nws lub peev xwm los hloov cov rheology, txhim kho cov rhelology, txhim kho cov haujlwm ua haujlwm thiab txhim kho kom ruaj khov.
1. Txheej txheem cej luam ntawm HydroxyPropyyl methylcellulose (HPMC):
HPMC yog qhov ua kom muaj txiaj ntsig ntawm cellulose, synthesized los ntawm hloov cov pawg hydroxyl ntawm cellulose nrog methoxy thiab hydroxypropyl pawg. Qhov kev hloov kho tshuaj lom neeg no muab HPMC cov khoom muaj txiaj ntsig, ua rau nws muaj kuab heev hauv dej thiab tuaj yeem tsim cov kev daws teeb meem ruaj khov. Hauv kev ua yeeb yam, HPMC ua raws li cov tuab, tuav, thiab cov dej-tuav tus neeg saib xyuas, cuam tshuam cov khoom tshiab thiab tawv tawv ntawm cov zaub mov.
2.Qhip ntawv sau ntawv:
Kev sib xyaw HPMC rau hauv cov qauv tso tawm ua kom tau txais kev ceev faj txog cov xwm txheej xws li faib tawm, qhov xav tau lub sijhawm, thiab sib xyaw nrog lwm cov kev sib ntxiv. Xaiv cov qib HPMC tsim nyog thiab kev pom zoo yog qhov tseem ceeb kom ua tiav qhov kev sib npaug zoo tagnrho ntawm cov txheej txheem thiab cov khoom siv tshuab. Ib qho ntxiv, kev sib cuam tshuam ntawm HPMC thiab lwm yam khoom xyaw xws li fitters, pigments, thiab dispersants yuav tsum tau ntsuas kom paub meej tias muaj kev sib tw thiab ua kom pom kev zoo.
3. Kev cuam tshuam rau cov txheej txheem:
Ib qho ntawm cov txiaj ntsig loj ntawm HPMC hauv Putty formulation yog nws lub peev xwm los txhim kho kev ua haujlwm los ntawm kev kho cov khoom sib dhos. HPMC ua raws li cov tuab tuab, nce viscosity ntawm cov putty muab tshuaj txhuam thiab txo sagging lossis dripping thaum lub sijhawm thov. Cov Khoom Siv Pseudoplastic ntawm HPMC daws tau txuas ntxiv yooj yim kis yooj yim thiab du ua tiav ntawm cov chaw ua haujlwm tag nrho thiab siv tau hauv cov kev siv sib txawv.
4. Kev cuam tshuam rau cov khoom siv tshuab:
Qhov kev sib txuas ntawm HPMC tuaj yeem cuam tshuam cov khoom siv tshuab ntawm putty, suav nrog lub zog ua kom muaj zog, tensile lub zog thiab lub zog yooj yim. HPMC ua ib zaj duab xis nyias nyias nyob rau saum cov chaw ua haujlwm, uas ua raws li cov nplaum thiab txhim kho cov adhesion interfacial ntawm cov khoom. Qhov no nce cohesion nyob rau hauv putty matrix thiab nce tsis kam rau kev tawg thiab deformation. Ib qho ntxiv, HPMC pab tsim cov tshuaj txiav me me, yog li kev txhim kho cov khoom ntiag tug xws li lub zog compressive thiab coj kev tiv thaiv.
5. Txhim Kho Durability:
Lub peev xwm ua kom ruaj khov yog qhov tseem ceeb ntawm kev ua yeeb yam pov tseg, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv sab nraum zoov uas muaj qhov chaw puag ncig thiab kub hloov tuaj yeem ua rau cov khoom dhau sijhawm. HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho lub durability ntawm kev txhim kho cov dej tsis kam, huab cua tsis kam thiab kev tawm tsam microbial. Lub Hydrophilic Xwm tso cai rau nws khaws cov dej noo hauv cov putty matrix, tiv thaiv lub cev qhuav dej thiab txo qhov kev pheej hmoo ntawm shrinkage cracks. Tsis tas li ntawd, HPMC cov yeeb yaj kiab tiv thaiv nyob rau saum npoo ntawm cov putty, uas tiv thaiv ya raws ntawm kev nkag mus thiab tshuaj lom neeg, yog li ncua kev pabcuam lub neej ntawm lub putty.
6. Kev txiav txim siab ib puag ncig:
Nyob rau hauv xyoo tsis ntev los no, tau muaj kev txaus siab txaus siab rau kev tsim cov ntaub ntawv zoo ib puag ncig lub tsev uas muaj kev cuam tshuam ib puag ncig. HPMC muaj ntau qhov zoo hauv qhov no, vim nws tau muab los ntawm cov khoom siv txuas tau yooj yim dua thiab yog biodegradable nyob rau hauv cov xwm txheej zoo. Ntxiv yog li ntawd, kev siv HPMC hauv Putty cov khoom siv ua tau zoo ntxiv thiab txo cov kauj vab ua tau zoo, yog li pab txhawb kev txuag hluav taws xob thiab peev txheej. Txawm li cas los xij, tag nrho cov kev sib tw ntawm HPMC muaj ntau yam xws li kev tsim khoom, tsheb thauj mus los thiab pov tseg, yuav tsum raug txiav txim siab saib xyuas nws lub peev xwm.
HydroxyPropyyl methylcellulose (HPMC) yog qhov cuam tshuam ntau ntau yam uas cuam tshuam tau ntau yam kev ua tau zoo ntawm kev tsim kho hauv kev siv. HPMC lub peev xwm los hloov cov khoom siv rheological, txhim kho kev ua haujlwm, txhim kho cov khoom siv hluav taws xob kom haum rau ntau yam uas yuav tsum tau ua. Txawm li cas los xij, kev ua tiav kev ua tau zoo tshaj plaws yuav tsum tau ua tib zoo saib xyuas cov qauv, kev xaiv yam xws li qib kawm, kev sib raug zoo thiab ib puag ncig cov xwm txheej. Cov kev tshawb fawb ntxiv yog xav tau los tshawb txog cov ntawv thov HPMC hauv HPMC hauv kev sib tw ua kom muaj kev sib tw hauv kev tsim kho kom ruaj khov.
Lub sij hawm Post: Febroo 22-2024