Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose derivative uas siv ntau yam, tshwj xeeb tshaj yog nyob rau hauv cov teb ntawm cov tshuaj, tshuaj pleev ib ce, khoom noj, thiab cov ntaub ntawv tsim kho. Nws tsis yog ib qho solvent, tab sis yog ib qho polymer soluble hauv dej uas tuaj yeem yaj hauv dej thiab tsim cov kua colloidal pob tshab. Qhov solubility ntawm AnxinCel®HPMC nyob ntawm tus lej thiab qhov chaw ntawm methyl thiab hydroxypropyl substituents hauv nws cov qauv molecular.
1. Cov khoom tseem ceeb ntawm hydroxypropyl methylcellulose
Hydroxypropyl methylcellulose tau los ntawm methylation thiab hydroxypropylation ntawm cellulose. Cellulose nws tus kheej yog ib qho polysaccharide siab-molecular ntuj uas muaj nyob rau hauv cov nroj tsuag cell phab ntsa. Cov qauv tshuaj ntawm HPMC feem ntau yog tsim los ntawm cov glucose units, uas yog cov saw ntev txuas nrog los ntawm β-1,4 glycosidic bonds. Hauv cov qauv molecular no, qee cov hydroxyl pawg raug hloov los ntawm methyl (-OCH₃) thiab hydroxypropyl (-C₃H₇OH), muab nws cov solubility zoo thiab lwm yam khoom siv lub cev thiab tshuaj.
Qhov solubility ntawm HPMC raug cuam tshuam los ntawm cov qauv molecular thiab feem ntau muaj cov yam ntxwv hauv qab no:
Kev yaj dej: HPMC tuaj yeem tsim cov kua nplaum hauv dej thiab yaj sai. Nws cov kev yaj yog ze rau qhov kub ntawm dej thiab qhov hnyav molecular ntawm HPMC.
Siab viscosity: Ntawm qee qhov concentration, cov tshuaj ntawm HPMC qhia tau tias muaj viscosity siab dua, tshwj xeeb tshaj yog ntawm qhov hnyav molecular siab thiab siab concentration.
Kev ruaj khov thermal: HPMC muaj kev ruaj khov zoo ntawm qee qhov kub thiab txias thiab tsis yooj yim rau decompose, yog li nws muaj qee qhov zoo hauv cov txheej txheem ua thermal.
2. Kev yaj ntawm HPMC
HPMC yog ib yam khoom uas yaj tau hauv dej, tab sis nws tsis yaj los ntawm txhua yam kuab tshuaj. Nws txoj kev yaj yog cuam tshuam nrog qhov polarity ntawm cov kuab tshuaj thiab kev sib cuam tshuam ntawm cov tshuaj yaj thiab cov tshuaj HPMC.
Dej: HPMC tuaj yeem yaj rau hauv dej. Dej yog nws cov kuab tshuaj feem ntau, thiab thaum lub sijhawm yaj, AnxinCel®HPMC molecules yuav tsim cov hydrogen bonds nrog cov dej molecules kom ua tiav kev yaj. Qib ntawm kev yaj yog cuam tshuam los ntawm cov yam xws li qhov hnyav molecular ntawm HPMC, qib ntawm methylation thiab hydroxypropylation, kub, thiab pH tus nqi ntawm dej. Feem ntau, qhov solubility ntawm HPMC yog qhov zoo tshaj plaws hauv ib puag ncig pH nruab nrab.
Cov kuab tshuaj organic: HPMC yuav luag tsis yaj hauv feem ntau cov kuab tshuaj organic, xws li cawv, ethers, thiab hydrocarbons. Qhov no yog vim nws cov qauv molecular muaj cov hydrophilic hydroxyl pawg thiab lipophilic methyl thiab hydroxypropyl pawg. Txawm hais tias nws muaj kev sib raug zoo rau dej, nws tsis sib haum nrog feem ntau cov kuab tshuaj organic.
Kev yaj dej kub: Hauv dej sov (feem ntau yog 40 ° C txog 70 ° C), HPMC yaj sai sai thiab cov tshuaj yaj ua rau pom muaj viscosity siab. Thaum qhov kub nce ntxiv, tus nqi yaj thiab solubility yuav nce ntxiv, tab sis thaum kub heev, qhov viscosity ntawm cov tshuaj yuav raug cuam tshuam.
3. Daim ntawv thov ntawm HPMC
Vim nws cov dej solubility zoo, tsis muaj tshuaj lom, thiab viscosity hloov kho tau, HPMC yog siv dav hauv ntau yam lag luam.
Kev lag luam tshuaj: Hauv kev lag luam tshuaj, HPMC siv dav hauv kev npaj tshuaj, kev txhaj tshuaj, cov gels, thiab cov khoom nqa tshuaj. Nws tuaj yeem pab cov tshuaj yaj hauv dej thiab tswj tus nqi ntawm kev tso tshuaj.
Kev Lag Luam Khoom Noj: HPMC, ua ib yam khoom noj khoom haus ntxiv, feem ntau yog siv rau emulsification, thickening, thiab moisturizing. Hauv cov khoom ci, nws tuaj yeem txhim kho qhov ductility thiab ruaj khov ntawm cov khob cij. HPMC kuj tseem siv rau hauv ice cream, dej haus thiab cov khoom noj uas muaj roj tsawg.
Kev lag luam tsim kho: Hauv kev lag luam tsim kho, HPMC feem ntau siv los ua cov khoom siv tuab rau kev tsim kho mortar, uas tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho, kev khaws dej thiab kev sib txuas ntawm cov mortar.
Tshuaj pleev ib ce: Hauv tshuaj pleev ib ce, AnxinCel®HPMC feem ntau yog siv ua cov khoom ua kom tuab, cov khoom siv ncua thiab cov khoom ruaj khov, thiab siv dav hauv cov khoom xws li tshuaj pleev ntsej muag, tshuaj zawv plaub hau, thiab cov tshuaj da dej.
HPMCyog ib qho cellulose derivative uas yaj tau hauv dej thiab muaj viscous heev uas tuaj yeem tsim cov kua colloidal pob tshab hauv dej. Nws tsis yog cov kuab tshuaj, tab sis yog cov tshuaj molecular siab uas tuaj yeem yaj hauv dej. Nws cov solubility feem ntau pom tseeb hauv cov solubility zoo hauv dej, tab sis tsis yaj hauv feem ntau cov kuab tshuaj organic. Cov yam ntxwv ntawm HPMC ua rau nws siv dav hauv ntau yam lag luam, suav nrog tshuaj, khoom noj, kev tsim kho, thiab tshuaj pleev ib ce.
Lub sijhawm tshaj tawm: Lub Ob Hlis-17-2025