1. Ma cellulose amadutsa ndi D-glucopyranose β- A polima mzere wopangidwa ndi kugwirizana kwa 1,4 glycoside bonds. The cellulose nembanemba palokha ndi kwambiri crystalline ndipo sangathe gelatinized m'madzi kapena kupanga nembanemba, choncho ayenera kusinthidwa mankhwala. Hydroxyl yaulere pamaudindo a C-2, C-3 ndi C-6 imapangitsa kuti ikhale ndi zochita zama mankhwala ndipo imatha kukhala oxidized reaction, etherification, esterification ndi kumezanitsa copolymerization. Kusungunuka kwa cellulose yosinthidwa kumatha kukhala bwino ndipo kumakhala ndi mawonekedwe abwino opangira mafilimu.
2. Mu 1908, katswiri wa zamankhwala wa ku Switzerland, Jacques Brandenberg, adakonza filimu yoyamba ya cellulose cellophane, yomwe inayambitsa chitukuko cha zipangizo zamakono zowonekera zofewa. Kuyambira m'ma 1980, anthu adayamba kuphunzira ma cellulose osinthidwa ngati filimu yodyera komanso zokutira. Membala ya cellulose yosinthidwa ndi nembanemba yomwe imapangidwa kuchokera ku zotumphukira zomwe zimapezedwa pambuyo posintha mankhwala a cellulose. Nembanemba yamtunduwu imakhala ndi mphamvu zolimba kwambiri, kusinthasintha, kuwonekera, kukana mafuta, osanunkhiza komanso osakoma, madzi apakatikati ndi kukana kwa okosijeni.
3. CMC imagwiritsidwa ntchito muzakudya zokazinga, monga zokazinga za ku France, kuti muchepetse kuyamwa kwamafuta. Mukagwiritsidwa ntchito limodzi ndi calcium kolorayidi, zotsatira zake zimakhala bwino. HPMC ndi MC chimagwiritsidwa ntchito kutentha mankhwala chakudya, makamaka chakudya yokazinga, chifukwa ndi matenthedwe gel osakaniza. Ku Africa, MC, HPMC, mapuloteni a chimanga ndi amylose amagwiritsidwa ntchito kutsekereza mafuta odyedwa muzakudya zokazinga zokazinga kwambiri za nyemba, monga kupopera mbewu mankhwalawa ndi kuviika pamipira ya nyemba zofiira kuti akonzere mafilimu odyedwa. Zinthu zoviikidwa za MC membrane ndizothandiza kwambiri pakutchinga mafuta, zomwe zimatha kuchepetsa kuyamwa kwamafuta ndi 49%. Nthawi zambiri, zitsanzo zoviikidwa zimawonetsa kuyamwa kochepa kwa mafuta kuposa opopera.
4. MCndi HPMC amagwiritsidwanso ntchito mu zitsanzo za wowuma monga mipira ya mbatata, batter, tchipisi ta mbatata ndi mtanda kuti apititse patsogolo ntchito yotchinga, nthawi zambiri popopera mbewu mankhwalawa. Kafukufuku akuwonetsa kuti MC ili ndi ntchito yabwino kwambiri yoletsa chinyezi ndi mafuta.Kukhoza kwake kusunga madzi kumakhala makamaka chifukwa cha kuchepa kwa hydrophilicity. Kupyolera mu microscope, zitha kuwoneka kuti filimu ya MC imakhala yabwino kumamatira ku chakudya chokazinga. Kafukufuku wasonyeza kuti zokutira za HPMC zopopera pamipira ya nkhuku zimakhala ndi madzi osungira bwino ndipo zimatha kuchepetsa kwambiri mafuta panthawi yokazinga. Zomwe zili m'madzi a chitsanzo chomaliza zimatha kuwonjezeka ndi 16.4%, zomwe zili pamwamba pa mafuta zimatha kuchepetsedwa ndi 17.9%, ndipo mafuta amkati amatha kuchepetsedwa ndi 33.7%.Mtengo wa HPMC. Pa gawo loyambirira la gel osakaniza, kukhuthala kumawonjezeka kwambiri, kumangika kwa ma intermolecular kumachitika mwachangu, ndi ma gel osakaniza ndi 50-90 ℃. The gel wosanjikiza angalepheretse kusamuka kwa madzi ndi mafuta pa Frying. Kuonjezera hydrogel kumtunda wakunja kwa nkhuku zokazinga zoviikidwa mu zinyenyeswazi za mkate kungathe kuchepetsa vuto la kukonzekera, ndipo kungachepetse kwambiri kuyamwa kwa mafuta a chifuwa cha nkhuku ndikusunga mawonekedwe apadera a chitsanzocho.
5. Ngakhale HPMC ndi yabwino edible filimu katundu ndi katundu makina abwino ndi kukana nthunzi madzi, ili ndi msika pang'ono. Pali zinthu ziwiri zomwe zimalepheretsa kugwiritsa ntchito kwake: choyamba, ndi gel osakaniza, ndiko kuti, gel osakaniza ndi viscoelastic opangidwa pa kutentha kwakukulu, koma amakhalapo mu njira yotsika kwambiri kutentha kwa firiji. Chotsatira chake, matrix ayenera kutenthedwa ndi kuuma pa kutentha kwakukulu panthawi yokonzekera. Kupanda kutero, pakuphimba, kupopera mbewu mankhwalawa kapena kuviika, yankholo ndi losavuta kuyenderera pansi, kupanga zinthu zosagwirizana ndi mafilimu, zomwe zimakhudza magwiridwe antchito amafilimu odyedwa. Kuphatikiza apo, ntchitoyi iyenera kuwonetsetsa kuti msonkhano wonse wopanga umasungidwa pamwamba pa 70 ℃, ndikuwononga kutentha kwambiri. Choncho, m'pofunika kuchepetsa gel osakaniza mfundo kapena kuonjezera mamasukidwe akayendedwe ake pa kutentha otsika. Chachiwiri, ndi okwera mtengo kwambiri, pafupifupi 100000 yuan/ton.
Nthawi yotumiza: Apr-26-2024