Cellulose ndiye polima wachilengedwe wochuluka kwambiri m'chilengedwe. Ndi mzere wa polima wolumikizidwa ndi D-shuga kudzera pa β-(1-4) glycosidic bond. Mlingo wa polymerization wa mapadi amatha kufika 18,000, ndipo kulemera kwa maselo kumatha kufika mamiliyoni angapo.
Ma cellulose amatha kupangidwa kuchokera ku nkhuni zamkati kapena thonje, lomwe palokha silisungunuka m'madzi, koma limalimbikitsidwa ndi alkali, etherified ndi methylene chloride ndi propylene oxide, kutsukidwa ndi madzi, ndikuwumitsa kuti mupeze madzi osungunuka a methyl cellulose (MC) ndi hydroxypropyl methylcellulose (HPMC), ndiko kuti, methoxy ndi hydroxypropoxy amagwiritsidwa ntchito m'malo mwa magulu a hydroxyl pa C2, C3 ndi C6 malo a shuga kuti apange ma nonionic cellulose ethers.
Methyl cellulose ndi mawonekedwe osanunkhiza, oyera mpaka oyera oyera, ndipo pH ya yankho ili pakati pa 5-8.
Methoxyl yomwe ili mu methylcellulose yomwe imagwiritsidwa ntchito ngati chowonjezera cha chakudya nthawi zambiri imakhala pakati pa 25% ndi 33%, digiri yofananira yolowa m'malo ndi 17-2.2, ndipo digiri ya m'malo mwake imakhala pakati pa 0-3.
Monga chowonjezera cha chakudya, methoxyl yomwe ili mu hydroxypropyl methylcellulose nthawi zambiri imakhala pakati pa 19% ndi 30%, ndipo hydroxypropoxyl imakhala pakati pa 3% ndi 12%.
Processing makhalidwe
Thermoreversible gel osakaniza
Methylcellulose/Hydroxypropylmethylcellulose imakhala ndi ma gelling a thermoreversible.
Methyl cellulose/hydroxypropyl methyl cellulose iyenera kusungunuka m'madzi ozizira kapena madzi otentha. Pamene njira yamadzimadzi imatenthedwa, kukhuthala kumapitirira kuchepa, ndipo gelation idzachitika ikafika kutentha kwina. Panthawiyi, methyl cellulose/hydroxypropyl methyl cellulose Njira yowonekera ya propyl methylcellulose inayamba kusanduka opaque milky white, ndipo kukhuthala kowonekera kunakula mofulumira.
Kutentha kumeneku kumatchedwa thermal gel initiation temperature. Gelisi akamazizira, kukhuthala kowoneka kumatsika mwachangu. Pomaliza, pamapindikira mamasukidwe akayendedwe pamene kuziziritsa kumagwirizana ndi mayendedwe oyambira otenthetsera kukhuthala, gel osakaniza amasandulika yankho, yankho limasandulika gel ikatenthedwa, ndipo njira yobwereranso kukhala yankho itatha kuzirala ndi yosinthika komanso yobwerezabwereza.
Hydroxypropyl methylcellulose imakhala ndi kutentha koyambira kwa kutentha kwambiri kuposa methylcellulose komanso mphamvu yotsika ya gel.
Pkachitidwe
1. Mafilimu opanga mafilimu
Mafilimu opangidwa ndi methylcellulose/hydroxypropylmethylcellulose kapena mafilimu omwe ali ndi zonsezi amatha kuteteza kusuntha kwa mafuta ndi kutaya madzi, motero kuonetsetsa kuti chakudya chili chokhazikika.
2. Emulsifying katundu
Methylcellulose/Hydroxypropylmethylcellulose imatha kuchepetsa kupsinjika kwapamtunda ndikuchepetsa kudzikundikira kwamafuta kuti ikhale yolimba emulsion.
3. Kutaya madzi
Methylcellulose/Hydroxypropylmethylcellulose amatha kuwongolera bwino kusamuka kwa chinyezi cha chakudya kuchokera kuzizira mpaka kutentha kwabwinobwino, ndipo kumatha kuchepetsa kuwonongeka, kuyeza kwa ayezi komanso kusintha kwa kapangidwe ka chakudya chifukwa cha firiji.
4. Ntchito zomatira
Methylcellulose/Hydroxypropylmethylcellulose imagwiritsidwa ntchito moyenera kuti ikhale ndi mphamvu zokwanira zomangira ndikusunga chinyezi komanso kutulutsa kakomedwe.
5. Kuchedwa kwa hydration
Kugwiritsa ntchito methylcellulose/hydroxypropylmethylcellulose kungachepetse kukhuthala kwa chakudya pakupanga matenthedwe, potero kumathandizira kwambiri kupanga. Imachepetsa kuwonongeka kwa boiler ndi zida, imafulumizitsa nthawi yozungulira, imathandizira kutentha, komanso imachepetsa mapangidwe a deposit.
6. Kukhuthala ntchito
Methylcellulose/Hydroxypropylmethylcellulose angagwiritsidwe ntchito osakaniza wowuma kuti apange synergistic zotsatira, amene kwambiri kuonjezera mamasukidwe akayendedwe ngakhale pa mlingo otsika kwambiri Kuwonjezera.
7. Njira yothetsera vutoli imakhala yokhazikika pansi pa acidic ndi mowa
Mayankho a Methylcellulose/Hydroxypropylmethylcellulose ndi okhazikika mpaka pH 3 ndipo amakhala okhazikika pamayankho okhala ndi mowa.
Kugwiritsa ntchito methyl cellulose muzakudya
Methyl cellulose ndi mtundu wa non-ionic cellulose ether wopangidwa pogwiritsa ntchito mapadi achilengedwe ngati zopangira ndikulowetsa magulu a hydroxyl pagawo la shuga la anhydrous mu cellulose ndi magulu a methoxy. Ili ndi kusungirako madzi, makulidwe, emulsification, mapangidwe a filimu, kusinthasintha Wide pH osiyanasiyana ndi ntchito zapamtunda ndi ntchito zina.
Chinthu chake chapadera kwambiri ndi gelation yosinthika ya thermally, ndiko kuti, njira yake yamadzimadzi imapanga gel osakaniza ikatenthedwa, ndipo imabwereranso ku yankho ikakhazikika. Amagwiritsidwa ntchito kwambiri muzakudya zophikidwa, zokazinga, zokometsera, sauces, soups, zakumwa, ndi essences. ndi maswiti.
The super gel mu methyl cellulose imakhala ndi mphamvu ya gel yopitilira katatu kuposa ma gels wamba a methyl cellulose, ndipo imakhala ndi zomatira zolimba kwambiri, kusunga madzi komanso kusunga mawonekedwe.
Zimapangitsa kuti zakudya zokonzedwanso zikhalebe zolimba komanso zotsekemera pakamwa panthawi komanso kwa nthawi yayitali mutatha kutenthedwa. Zomwe zimagwiritsidwa ntchito ndi zakudya zozizira msanga, zamasamba, nyama yokonzedwanso, nsomba ndi nsomba zam'madzi ndi soseji zopanda mafuta ochepa.
Nthawi yotumiza: Dec-12-2022