HydroxyPropylenCellulose yog cov nrov-soluble polymer uas ua kom muaj kev daws teeb meem meej thiab ruaj khov hauv cov tshuaj, khoom noj thiab kev tsim kho cov lag luam. Nws yog cov tsis-ionic cellulose-raws cov khoom siv raw uas txhim kho cov khoom sib raug zoo thiab cov khoom sib xyaw ntawm cov khoom kawg. Txhawm rau kom muaj kev ua tau zoo ntawm hydroxypropylulose, cov khoom yuav tsum tau raug kuaj thiab tsim nyog ua ntej siv. Hauv tsab xov xwm no, peb yuav sib tham txog peb txoj kev txhim khu kev qha los qhia qhov zoo ntawm hydroxypropy kasthylcelulose.
1. Viscosity Test
Lub viscosity ntawm hydroxypropylencellulose yog qhov tseem ceeb ntsuas los txiav txim nws qhov zoo. Viscosity yog qhov tsis kam ntawm cov kua dej ntws thiab yog ntsuas hauv centipoise (CPS) lossis MPA.S. Lub viscosity ntawm hydroxypropyyl methylcellulose sib txawv raws li nws cov kev hnyav molecular thiab qib hloov chaw. Cov qib siab dua ntawm kev hloov chaw, qis dua viscosity ntawm cov khoom.
Txhawm rau sim cov viscosity ntawm hydroxypropylulose, yaj ib qho me me ntawm cov khoom hauv dej thiab siv viscais ntsuas qhov kev daws teeb meem. Lub viscosity ntawm kev daws teeb meem yuav tsum nyob hauv cov kev pom zoo muab los ntawm cov khoom lag luam muag khoom. Cov khoom lag luam zoo hydroxyprropyl methylpeculose cov khoom yuav tsum muaj qhov viscosity zoo sib xws, uas yog qhov qhia txog kev coj dawb huv thiab cov khaub ncaws me me.
2. Kev kuaj mob
Cov qib kawm hloov pauv yog hais txog qhov sib piv ntawm cov pab pawg hydroxyl ntawm cov xov xwm cellulose hloov los ntawm hydroxypropyl lossis methyl pawg. Cov degree ntawm kev hloov pauv yog qhov ntsuas ntawm cov khoom siv huv, qib siab dua ntawm cov khoom lag luam, lub purer cov khoom. High-zoo hydroxypropal tshuaj yuav tsum muaj qib siab hloov chaw.
Txhawm rau kuaj cov qib ntawm qhov hloov chaw, ib lub tsev pheeb suab yog ua nrog sodium hydroxide thiab hydrochloric acid. Txheeb xyuas qhov ntau ntawm sodium hydroxide xav tau rau neutralize hydroxypropylulose thiab laij cov ntawv hloov chaw uas siv cov qauv hauv qab no:
Qib Hloov = ([ntim ntawm Naoh] X [MaoH] X 162) / ([Qhov hnyav ntawm hydroxypropyl cellulose] x 3)
Cov qib degree hloov chaw yuav tsum nyob hauv cov kev pom zoo muab los ntawm cov khoom lag luam muag khoom. Cov degree ntawm kev ua kom zoo hydroxypropyl methylropen cov khoom yuav tsum nyob hauv cov kev pom zoo.
3. Solubility kuaj
Lub solubility ntawm hydroxypropy kasthylulose yog lwm tus yuam sij yuam sij txiav txim siab nws qhov zoo. Cov khoom yuav tsum tau yooj yim soluble hauv dej thiab tsis ua cov lumps lossis gels. High-zoo hydroxypropal methylpcellulose cov khoom yuav tsum yaj sai thiab tusyees.
Txhawm rau ua solubility kuaj, yaj ib qho me me ntawm cov khoom hauv dej thiab do txoj kev daws kom txog thaum yaj tas. Kev daws yuav tsum muaj tseeb thiab pub dawb los ntawm cov lumps lossis gels. Yog tias cov khoom lag luam tsis yaj yooj yim los yog cov lumps lossis gels, nws tuaj yeem yog lub cim ntawm tsis zoo.
Hauv kev xaus, HydroxyPropyyl methylcellulose yog ib qho khoom siv muaj txiaj ntsig siv hauv kev lag luam ntau yam. Txhawm rau kom ntseeg tau qhov zoo ntawm cov khoom, viscosity, hloov chaw thiab kev ntsuam xyuas solubility yog nqa tawm. Cov kev ntsuas no yuav pab kom nkag siab meej txog cov yam ntxwv ntawm cov khoom lag luam thiab pab kom paub qhov txawv nws zoo. High-zoo hydroxylropal methylcellose muaj cov viscosity zoo sib xws, thiab cov qib siab hloov chaw, thiab yaj sai sai thiab uniformly hauv dej.
Lub Sijhawm Post: Jul-11-2023