Kutentha kwa gelation kutentha kwa efa ya cellulose HPMC

yambitsani

Ma cellulose ethers ndi ma polima osungunuka m'madzi a anionic ochokera ku cellulose. Ma polima awa amagwiritsidwa ntchito m'mafakitale osiyanasiyana monga chakudya, mankhwala, zodzoladzola, ndi zomangamanga chifukwa cha zinthu zawo monga kukhuthala, kupanga gelling, kupanga filimu, ndi emulsifying. Chimodzi mwazinthu zofunika kwambiri za ma cellulose ethers ndi kutentha kwawo kwa gelation (Tg), kutentha komwe polima imadutsa kusintha kwa gawo kuchokera ku sol kupita ku gel. Katunduyu ndi wofunikira kwambiri pakutsimikiza magwiridwe antchito a ma cellulose ethers m'magwiritsidwe osiyanasiyana. M'nkhaniyi, tikambirana za kutentha kwa gelation kwa hydroxypropyl methylcellulose (HPMC), imodzi mwa ma cellulose ethers omwe amagwiritsidwa ntchito kwambiri mumakampani.

Kutentha kwa gelation ya HPMC

HPMC ndi semi-synthetic cellulose ether yomwe imagwiritsidwa ntchito kwambiri m'njira zosiyanasiyana chifukwa cha mawonekedwe ake apadera. HPMC imasungunuka kwambiri m'madzi, ndikupanga mayankho omveka bwino okhala ndi viscous pamlingo wotsika. Pamlingo wapamwamba, HPMC imapanga ma gels omwe amatha kusinthidwa akatenthedwa ndi kuzizira. Kutenthedwa kwa HPMC ndi njira ya magawo awiri yokhudza kupanga ma micelles kutsatiridwa ndi kuphatikizana kwa ma micelles kuti apange netiweki ya gel (Chithunzi 1).

Kutentha kwa gelation ya kutentha kwa HPMC kumadalira zinthu zingapo monga kuchuluka kwa kusintha (DS), kulemera kwa mamolekyulu, kuchuluka kwa madzi, ndi pH ya yankho. Kawirikawiri, DS ndi kulemera kwa mamolekyulu kwa HPMC zikachuluka, kutentha kwa gelation ya madzi kumakhala kwakukulu. Kuchuluka kwa HPMC mu yankho kumakhudzanso Tg, kuchuluka kwa madzi, Tg imakwera. pH ya yankho imakhudzanso Tg, ndi mayankho a acidic omwe amachititsa kuti Tg ikhale yotsika.

Kuchuluka kwa HPMC m'thupi kumasinthasintha ndipo kungakhudzidwe ndi zinthu zosiyanasiyana zakunja monga mphamvu yodula, kutentha, ndi kuchuluka kwa mchere. Kudula kumaswa kapangidwe ka gel ndikuchepetsa Tg, pomwe kutentha kowonjezereka kumapangitsa kuti gel isungunuke ndikuchepetsa Tg. Kuonjezera mchere mu yankho kumakhudzanso Tg, ndipo kupezeka kwa ma cations monga calcium ndi magnesium kumawonjezera Tg.

Kugwiritsa ntchito Tg HPMC zosiyanasiyana

Kachitidwe ka HPMC kogwiritsa ntchito thermogelling kakhoza kukonzedwa kuti kagwiritsidwe ntchito mosiyanasiyana. Ma HPMC otsika a Tg amagwiritsidwa ntchito pogwiritsira ntchito zomwe zimafuna kulowetsedwa mwachangu, monga makeke otsekemera nthawi yomweyo, msuzi ndi supu. HPMC yokhala ndi Tg yapamwamba imagwiritsidwa ntchito pogwiritsira ntchito zomwe zimafuna kulowetsedwa mochedwa kapena kwa nthawi yayitali, monga kupanga njira zoperekera mankhwala, mapiritsi otulutsa nthawi yayitali, ndi zomatira zomangira mabala.

Mu makampani opanga chakudya, HPMC imagwiritsidwa ntchito ngati chokhuthala, chokhazikika komanso chothandizira kupanga ma gelling. HPMC Yotsika Tg imagwiritsidwa ntchito mu ma dessert omwe amafunikira gelation yachangu kuti apange kapangidwe kake ndi kumverera kwa pakamwa. HPMC yokhala ndi Tg yayikulu imagwiritsidwa ntchito mu ma formular okhala ndi mafuta ochepa pomwe gelation yochedwa kapena yayitali imafunika kuti ipewe syneresis ndikusunga kapangidwe kake.

Mu makampani opanga mankhwala, HPMC imagwiritsidwa ntchito ngati chomangira, chochotsa poizoni m'thupi komanso chotulutsa poizoni nthawi zonse. HPMC yokhala ndi Tg yapamwamba imagwiritsidwa ntchito popanga mapiritsi otulutsa poizoni nthawi yayitali, pomwe kuchedwetsa kapena kutalikitsa jekeseni kumafunika kuti mankhwalawo atulutsidwe kwa nthawi yayitali. HPMC yotsika jekeseni imagwiritsidwa ntchito popanga mapiritsi otulutsa poizoni m'kamwa, komwe kusweka mwachangu ndi kusungunuka jekeseni kumafunika kuti pakhale kumva bwino pakamwa komanso kusavuta kumeza.

Pomaliza

Kutentha kwa gelation ya HPMC ndi chinthu chofunikira chomwe chimatsimikizira momwe imagwirira ntchito m'njira zosiyanasiyana. HPMC imatha kusintha Tg yake kudzera mu kuchuluka kwa kusintha, kulemera kwa mamolekyulu, kuchuluka kwake ndi pH ya yankho kuti igwirizane ndi ntchito zosiyanasiyana. HPMC yokhala ndi Tg yotsika imagwiritsidwa ntchito pa ntchito zomwe zimafuna gelation yofulumira, pomwe HPMC yokhala ndi Tg yokwera imagwiritsidwa ntchito pa ntchito zomwe zimafuna gelation yochedwa kapena yayitali. HPMC ndi ether ya cellulose yosinthasintha komanso yosinthasintha yokhala ndi ntchito zambiri zomwe zingatheke m'mafakitale osiyanasiyana.