HydroxyPropyyl Metylcellulose (HPMC) yog cov khoom siv hydrophobic thiab hydrophilic yam ntxwv, ua rau muaj ntau yam kev siv ntau yam thoob plaws kev lag luam. Txhawm rau kom nkag siab txog cov hydrothobicity thiab hydrophilicity ntawm Hydmc, peb yuav tsum kawm nws cov qauv, cov khoom thiab kev siv thiab kev siv hauv qhov tob.
Tus qauv ntawm hydroxypropal methylcellose:
HPMC yog qhov ua kom muaj txiaj ntsig ntawm cellulose, lub ntuj polymer pom hauv tsob ntoo cell phab ntsa. Kev hloov kho ntawm cellulose cuam tshuam nrog kev qhia txog hydroxyprropyl thiab methyl pawg rau hauv lub cellulose cellebone. Qhov kev hloov kho no pauv cov khoom ntawm cov polymer, ua rau cov khoom tshwj xeeb uas muaj txiaj ntsig zoo rau ntau cov ntawv thov.
Hydrophilicity ntawm HPMC:
Hydroxy:
HPMC muaj cov pab pawg hydroxyprropyl thiab yog hydrophilic. Cov pab pawg hydroxyl muaj kev sib txawv rau cov roj av molecules vim hydrogen bonding.
Hydroxypropyl Group tuaj yeem tsim cov khoom siv hydrogen nrog cov lwg dej, ua HPMC soluble hauv dej rau ib qho.
Methyl:
Thaum lub methyl pab pawg ua rau tag nrho cov pab pawg hydrophobicity ntawm cov molecule, nws tsis cuam tshuam lub hydrophilicity ntawm hydroxypropylroproutyl.
Cov methyl pawg yog qhov tsis yog-polar, tab sis muaj cov pab pawg hydroxypropilropyl yuav txiav txim siab lub cim hydrothilic.
Hydrophobicity ntawm HPMC:
Methyl:
Cov methyl pawg hauv HPMC txiav txim siab rau qee qhov nws hydrophobicity.
Txawm hais tias tsis yog li hydrophobic raws li qee cov hluavtaws hluavtaws tag nrho, muaj cov pab methyl txo tag nrho Hydrophilicity ntawm HPMC.
Zaj duab xis tsim cov khoom:
HPMC paub txog nws cov khoom ua yeeb yaj kiab ua yeeb yam thiab feem ntau tau siv tau hauv cov ntaub ntawv thiab kev siv tshuaj pleev ib ce. Hydrophobicity pab rau kev tsim ntawm cov yeeb yaj kiab tiv thaiv.
Kev sib cuam tshuam nrog cov khoom tsis muaj-polar:
Hauv qee cov ntawv thov, HPMC tuaj yeem cuam tshuam nrog cov ntawv tsis yog-polar vim nws ib feem ntawm hydrophobicity. Cov cuab yeej no yog qhov tseem ceeb rau kev siv tshuaj rau cov tshuaj hauv cov chaw muag tshuaj.
Cov ntawv thov ntawm HPMC:
Tshuaj:
HPMC tau dav siv hauv cov ntaub ntawv ntawm cov kws tshuaj zoo li lub binder, zaj duab xis yav tas los, thiab viscosity concifi. Nws cov yeeb yaj kiab-tsim muaj peev xwm tswj tau cov tshuaj tso tawm.
Nws yog siv hauv cov ntaub ntawv tsis zoo xws li cov ntsiav tshuaj thiab cov tsiav tshuaj.
Kev Lag Luam Kev Tsim Kho Kev Tsim Kho:
Hauv kev ua haujlwm hauv kev ua haujlwm, HPMC yog siv hauv cov cai tso cai rau kev tso cai los txhim kho kev ua haujlwm, khaws dej khaws cia thiab cov tshuaj nplaum.
Hydrophilicity pab khaws dej, thaum hydrophobicity pab txhim kho adhesion.
Kev Lag Luam Khoom Noj:
HPMC yog siv los ua cov tuab tuab thiab muaj kev lag luam nyob hauv kev lag luam khoom noj. Nws cov xwm Hydrophilic pab tsim cov gels ruaj khov thiab tswj lub viscosity ntawm cov zaub mov noj.
Tshuaj pleev ib ce:
Hauv kev ua kom zoo nkauj, HPMC yog siv nyob rau hauv cov khoom xws li cream thiab potions vim nws zaj duab xis tsim thiab thickenies cov khoom.
Hydrophilicity ntseeg cov dej haus huv ntawm daim tawv nqaij.
Hauv kev xaus:
HPMC yog cov polymer uas yog ob qho hydrophilic thiab hydrophobic. Qhov sib npaug ntawm cov pawg methropropyl thiab methyl pawg nyob rau hauv nws tus qauv muab nws cov khoom tshwj xeeb, tso cai rau nws muaj ntau cov ntawv thov. Nkag siab cov khoom no yog qhov tseem ceeb rau kev ntaus HPMC rau kev siv sib txawv, qhov twg HPMC los cuam tshuam nrog dej thiab cov tshuaj tsis yog siv rau ntau lub hom phiaj.
Lub Sijhawm Post: Dec-15-2023