Kodi mukudziwa za hypromellose?

Hydroxypropyl methylcellulose (dzina la INN: Hypromellose), yomwe imamasuliridwanso ngati hypromellose (hydroxypropyl methylcellulose, yomwe imafupikitsidwa ngatiHPMC), ndi mitundu yosiyanasiyana ya ma ether osakanikirana a cellulose omwe si a ionic. Ndi polima ya viscoelastic yomwe imagwiritsidwa ntchito ngati mafuta odzola mu ophthalmology, kapena ngati chowonjezera kapena chowonjezera mu mankhwala opangidwa pakamwa, ndipo imapezeka kwambiri m'mafakitale osiyanasiyana ogulitsa.

Monga chowonjezera pazakudya, hypromellose imatha kugwira ntchito izi: emulsifier, thickener, suspending agent komanso cholowa m'malo mwa gelatin ya nyama. Khodi yake (E-code) mu Codex Alimentarius ndi E464.

Kapangidwe ka mankhwala:

Chogulitsidwa chomalizidwa chahydroxypropyl methylcelluloseNdi ufa woyera kapena woyera wosasunthika wa ulusi wolimba, ndipo kukula kwa tinthu tating'onoting'ono kumadutsa mu sieve ya ma mesh 80. Chiŵerengero cha kuchuluka kwa methoxyl ndi kuchuluka kwa hydroxypropyl mu chinthu chomalizidwa ndi chosiyana, ndipo kukhuthala kwake ndi kosiyana, kotero chimakhala mitundu yosiyanasiyana yokhala ndi magwiridwe antchito osiyanasiyana. Ili ndi makhalidwe osungunuka m'madzi ozizira komanso osasungunuka m'madzi otentha mofanana ndi methyl cellulose, ndipo kusungunuka kwake mu zosungunulira zachilengedwe kumaposa madzi. Ikhoza kusungunuka mu methanol ndi ethanol yopanda madzi, ndipo imatha kusungunukanso mu ma hydrocarbons okhala ndi chlorine monga dichloro methane, trichloroethane, ndi zosungunulira zachilengedwe monga acetone, isopropanol, ndi diacetone alcohol. Ikasungunuka m'madzi, imasakanikirana ndi mamolekyu amadzi kuti ipange colloid. Ndi yokhazikika ku acid ndi alkali, ndipo sikhudzidwa ndi pH = 2 ~ 12. Hypromellose, ngakhale si poizoni, imatha kuyaka ndipo imayamwa mwamphamvu ndi zodzoladzola.

Kukhuthala kwa zinthu za HPMC kumawonjezeka ndi kuwonjezeka kwa kuchuluka kwa zinthu ndi kulemera kwa mamolekyulu, ndipo kutentha kukakwera, kukhuthala kwake kumayamba kuchepa. Kukafika kutentha kwina, kukhuthala kwake kumakwera mwadzidzidzi ndipo kutalika kwake kumafika. Yankho lake lamadzi limakhala lokhazikika kutentha kwa chipinda, kupatula kuti limatha kuwonongeka ndi ma enzyme, ndipo kukhuthala kwake konse sikuwononga. Lili ndi mphamvu zapadera zotenthetsera, mphamvu zabwino zopangira filimu komanso ntchito yapamwamba.

Kupanga:

Pambuyo poti cellulose yachiritsidwa ndi alkali, anion ya alkoxy yomwe imapangidwa ndi deprotonation ya gulu la hydroxyl imatha kuwonjezera propylene oxide kuti ipange hydroxypropyl cellulose ether; imathanso kusakanikirana ndi methyl chloride kuti ipange methyl cellulose ether. Hydroxypropyl methylcellulose imapangidwa pamene zonse ziwiri zimachitika nthawi imodzi.

Kugwiritsa ntchito:

Kugwiritsa ntchito hydroxypropyl methylcellulose kuli kofanana ndi kugwiritsa ntchito ma ether ena a cellulose. Amagwiritsidwa ntchito makamaka ngati chosungunula, chosungunula, chothina, chosakaniza, chokhazikika komanso chomatira m'magawo osiyanasiyana. Ndi chapamwamba kuposa ma ether ena a cellulose pankhani ya kusungunuka, kufalikira, kuwonekera bwino komanso kukana ma enzyme.

Mu makampani opanga zakudya ndi mankhwala, imagwiritsidwa ntchito ngati chowonjezera. Imagwiritsidwa ntchito ngati guluu, chokhuthala, chosungunula, chothandiza kuyeretsa, chokhazikika komanso chosakaniza. Sichili ndi poizoni, sichili ndi zakudya zokwanira, komanso sichisintha kagayidwe kachakudya.

Kuphatikiza apo,HPMCImagwiritsidwa ntchito mu kupanga ma polymerization a utomoni wopangidwa, petrochemicals, ceramics, papermaking, chikopa, zodzoladzola, zokutira, zipangizo zomangira ndi mbale zosindikizira zomwe zimakhala ndi kuwala.