Hydroxypropyl methylcellulose thiab sodium carboxymethylcellulose yog ob lub cellulose derivatives dav siv nyob rau hauv ntau yam lag luam. Lawv txhua tus muaj cov khoom tshwj xeeb thiab feem ntau ntxiv rau cov khoom noj, tshuaj, tshuaj pleev ib ce thiab khoom siv hauv tsev. Cov lus nug feem ntau nug los ntawm cov kws tshaj lij kev lag luam yog seb hydroxypropyl methylcellulose thiab sodium carboxymethylcellulose puas tuaj yeem sib xyaw. Cov lus teb yog yog, lawv tuaj yeem sib xyaw thiab cov txiaj ntsig ntawm kev sib xyaw ua ke no muaj ntau yam.
Hydroxypropylmethylcellulose, tseem hu ua HPMC, yog ib qho kev hloov kho cellulose uas tau hloov kho tshuaj los txhim kho nws cov khoom. Dav siv los ua thickener thiab emulsifier hauv cov khoom noj, tshuaj pleev ib ce thiab tshuaj. HPMC yog yooj yim soluble nyob rau hauv dej, muab ib tug ruaj khov, meej tov. Nws kuj tseem paub txog nws cov viscosity siab thiab zoo heev film-forming zog.
Ntawm qhov tod tes, sodium carboxymethylcellulose, tseem hu ua CMC, yog cov dej-soluble cellulose derivative dav siv los ua cov thickener thiab stabilizer hauv cov khoom noj thiab tshuaj. Nws yog cellulose tau los ntawm cov tshuaj tiv thaiv ntawm sodium chloroacetate thiab cellulose. CMC kuj tsis muaj tshuaj lom, biodegradable thiab environmentally friendly.
HPMC thiab CMC muaj cov khoom sib ntxiv uas ua rau lawv muaj kev sib xyaw ua ke zoo rau ntau yam kev siv. Ob leeg yog cov dej soluble heev thiab muaj cov thickening zoo heev thiab emulsifying zog. Tsis tas li ntawd, lawv txhua tus tau sib haum nrog ntau yam tshuaj thiab lwm yam khoom xyaw, tso cai rau lawv siv rau ntau yam khoom.
Thaum HPMC thiab CMC sib xyaw, cov kev daws teeb meem muaj ntau qhov zoo. Ib qho ntawm cov txiaj ntsig tseem ceeb yog tias nws muaj kev tswj hwm viscosity zoo, uas txhais tau tias nws tuaj yeem siv los ua cov thickener hauv ntau yam khoom, nrog rau cov tshuaj pleev ib ce, tshuaj zawv plaub hau thiab lwm yam khoom siv tu tus kheej. Tsis tas li ntawd, kev sib xyaw ua ke ntawm HPMC thiab CMC muab kev ruaj ntseg zoo, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov khoom lag luam uas xav tau ntev ntev thiab kev ruaj ntseg.
Lwm qhov txiaj ntsig ntawm kev sib xyaw HPMC thiab CMC yog tias nws tuaj yeem txhim kho kev tawg ntawm cov khoom xyaw. Thaum ob qho tib si siv ua ke, lawv tuaj yeem pab faib cov khoom xyaw sib npaug thoob plaws hauv ib qho khoom, txhim kho nws qhov kev ua tau zoo tag nrho. Qhov no yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau cov tshuaj uas tsis sib xws ntawm cov khoom xyaw nquag yog qhov tseem ceeb.
HPMC thiab CMC kuj tseem siv rau hauv kev tsim kho kev lag luam. Thaum siv ua ke, lawv muab cov adhesion zoo thiab viscosity, uas yog qhov tseem ceeb hauv ntau daim ntawv thov kev tsim kho. Kev sib xyaw ua ke kuj tseem ruaj khov, txhais tau tias nws tuaj yeem siv ntau yam khoom tsis muaj kev txhawj xeeb txog kev sib cais.
Hydroxypropyl methylcellulose thiab sodium carboxymethylcellulose yog ob lub cellulose derivatives uas tuaj yeem sib xyaw thiab siv ua ke hauv ntau hom kev siv. Cov txiaj ntsig kev daws teeb meem muab kev sib xyaw ua ke zoo ntawm cov khoom suav nrog kev tswj viscosity, ruaj khov thiab txhim kho cov khoom sib xyaw. Txawm hais tias nyob rau hauv cov khoom noj, tshuaj, tshuaj pleev ib ce los yog cov ntaub ntawv tsim kho, kev sib xyaw ntawm HPMC thiab CMC yog qhov tseeb tias yuav muab cov txiaj ntsig zoo.
Post lub sij hawm: Sep-12-2023