HydroxyPropyyl Metylcellulose (HPMC) yog ib qho khoom siv muaj nyob hauv phab ntsa Putty, tshwj xeeb tshaj yog rau sab hauv tsev thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov thiab sab nraum zoov.
HPMC Hmoov Taw Qhia:
Txhais thiab muaj pes tsawg leeg:
HydroxyPropyyl methylcellulose, hu ua HPMC, yog hloov kho cellulose hloov tshiab los ntawm cov ntaub ntawv ntuj. Nws yog synthesized los ntawm kev siv cellulation cellulose, ib qho nyuaj carbohydrate pom hauv tsob ntoo cell phab ntsa. Kev hloov kho tau cuam tshuam nrog kev qhia txog hydroxypropyl thiab methyl pawg rau hauv cov qauv cellulose, ua rau hauv dej-soluble thiab ntau yam polymer.
Lub cev thiab tshuaj lom neeg:
Solubility: HPMC yog soluble hauv dej, sib sau ib qho ntshiab thiab tsis muaj xim. Solubility tuaj yeem hloov kho los ntawm kev hloov pauv ntawm qhov hloov pauv (DS) thaum lub sijhawm tsim khoom lag luam.
Viscosity: HPMC imparts ib tug tswj tau thiab zoo nkauj viscosity rau kev daws. Cov cuab yeej no yog qhov tseem ceeb nyob rau hauv Phab Ntsa Putty formulations raws li nws cuam tshuam rau lub workability thiab thov tej yam ntxwv ntawm cov khoom.
Thermal gelation: HPMC cov khoom ua pov thawj thermal gelation, uas txhais tau tias nws tuaj yeem tsim cov gel thaum ua kom sov. Cov cuab yeej no yog qhov tseem ceeb hauv qee cov ntawv thov uas yuav tsum tau ua.
Daim ntawv thov HPMC hauv phab ntsa Putty:
Sab hauv phab ntsa hauv qab:
1. Tsevneeg thiab Adhesion:
HPMC txhim kho cov khoom sib khi ntawm phab ntsa phab ntsa sab hauv Putties, kom ua kom zoo dua cov nplaum kom subtrates xws li pob zeb ua vaj tse, stucco lossis phab ntsa.
HPMC cov qauv kev txhim kho cellulose hloov kho cov yeeb yaj kiab nyias nyias nyob saum npoo, muab cov nyiaj ua ke muaj zog thiab ruaj khov.
2. Cov Txheej Txheem thiab Yooj Yim Ntawm Daim Ntawv Thov:
Cov tswj viscosity ntawm HPMC muab lub works putty, tso cai nws yuav tsum tau thov kom yooj yim thiab yooj yim rau cov chaw sab hauv.
Nws tiv thaiv sagging thiab dripping thaum lub sijhawm thov thiab ua kom muaj txheej txheej sib txawv.
3. Dej khaws cia:
HPMC kev ua raws li dej tuav tus neeg sawv cev, tiv thaiv kev tiv thaiv dej evaporation sai thaum lub sijhawm kho theem. Qhov no yuav pab txhim kho cov dej ntawm cov putty, ua rau muaj kev txhim kho zoo dua qub.
Phab Ntsa Sab Nrauv sab nrauv Putty:
1. Huab cua Kuj:
HPMC txhim kho huab cua tiv thaiv ntawm phab ntsa phab ntsa sab nrauv thiab tiv thaiv cov kev tsis zoo ntawm tshav ntuj, nag thiab qhov kub thiab txias.
Cov yeeb yaj kiab polymer tsim los ntawm HPMC ua raws li txoj kev thaiv, tiv thaiv cov dej noo noo thiab tswj kev ncaj ncees ntawm txheej.
2. Tawg tiv thaiv:
Qhov yooj yooj yim ntawm HPMC ua rau muaj kev tawg tawm ntawm sab nrauv phab ntsa soty. Nws haum rau cov kev txav mus los tsis cuam tshuam rau kev ncaj ncees ntawm txheej.
Cov cuab yeej no yog qhov tseem ceeb rau cov ntawv thov sab nraud raug nthuav tawm rau kev ntxhov siab ib puag ncig.
3. Durabe:
HPMC txhim kho qhov ua tiav tag nrho ntawm kev siv sab nrauv los ntawm kev txhim kho nws txoj kev tiv thaiv kom tsis taus pa, cuam tshuam thiab tshuaj lom neeg raug mob.
Tus yeeb yaj kiab tiv thaiv tsim los ntawm HPMC pab txuas ntxiv lub neej ntawm txheej thiab txo qhov xav tau kev saib xyuas nquag.
Qhov zoo ntawm kev siv HPMC hauv phab ntsa Putty:
1. Lub ruaj khov zoo:
HPMC kom ntseeg tau tias phab ntsa ua kom zoo nkauj yog cov qauv zoo ib yam thiab ua tau raws li qhov ua tau zoo.
2. Txhim Kho Kev Ua Haujlwm:
Cov tswj viscosity ntawm HPMC muab cov txheej txheem zoo dua qub, ua rau cov txheej txheem thov tau ntau dua thiab cov neeg siv.
3. Txhim Kho Adhaceion:
Cov khoom nplaum ntawm HPMC pab txhawb rau Adhesion zoo heev, kom ntseeg tau cov khoom siv putty zoo rau ntau yam ntawm substrates.
4. Versatility:
HPMC yog ntau yam thiab tuaj yeem siv ntau yam qauv thiab tuaj yeem kho kom haum raws li cov phiaj xwm tshwj xeeb.
Hauv kev xaus:
HydroxyPropyyl methylcellueculose (HPMC) hmoov yog qhov tseem ceeb hauv sab hauv thiab sab nrauv Phab Ntsa Putty putulas putulas. Nws cov khoom tshwj xeeb, suav nrog solubility, viscosity tswj thiab ua yeeb yaj kiab-ua rau kev txhim kho cov kev ua tau zoo thiab ruaj khov ntawm phab ntsa txheej ntsa. Txawm hais tias siv nyob hauv tsev lossis sab nraud, phab ntsa muaj cov HPMC muaj cov khoom siv zoo ib yam thiab kev tiv thaiv ntev ntev. Raws li kev tsim kho kev tsim kho txuas ntxiv mus evolve, lub luag haujlwm ntawm HPMC hauv Phab Ntsa Putty formulations tseem muaj txiaj ntsig zoo los ua kom tiav cov txiaj ntsig zoo thiab resilient tiav.
Lub Sijhawm Post: Jan-25-2024