1. Iselula idluliswa yi-D-glucoopyranose Β- i-polymer ekhanyayo eyakhiwe ngokuxhumeka kwezibopho ezingama-1,4 glycoside. I-cellulose membrane ngokwayo iyi-crystalline enkulu futhi ayikwazi ukufakwa emanzini noma yakhiwa ku-membrane, ngakho-ke kufanele iguqulwe ngamakhemikhali. I-Hydroxyl yamahhala ezikhundleni C-2, C-3 ne-C-6 zizinikele ngomsebenzi wamakhemikhali futhi zingaba wukuphendula oxidized, ukusheshisa, ukucaciswa kanye nokuxhunyaka kwe-compasization. I-solubity yeselula eguquliwe ingathuthukiswa futhi inefilimu enhle eyakha ukusebenza.
2. Ngo-1908, uJacques Chemist Jacques Brandenberg ulungiselele i-cellulose film Cellophane yokuqala, eyayiphayona ukuthuthukiswa kwezinto zesimanjemanje ezithambile zokupakisha. Kusukela ngo-1980s, abantu baqala ukutadisha iselula eguquliwe njengefilimu edliwayo nokuhlanganiswa. I-Modified cellulose membrane iyinto elungiselelwe i-membrane eyenziwe ngezinto zokutholwa ezitholwe ngemuva kokuguqulwa kwamakhemikhali kwe-cellulose. Lolu hlobo lwe-membrane lunamandla aphezulu, ukuguquguquka, ukucaca, ukumelana nomoya, ukumelana kawoyela, okungenamqondo futhi okungenamkhawulo, amanzi aphakathi nendawo kanye nomoya-mpilo.
3. I-CMC isetshenziswa ekudleni okuthosiwe, njengama-fries aseFrance, ukunciphisa ukumuncwa kwamafutha. Lapho isetshenziswa kanye ne-calcium chloride, umphumela ungcono. I-HPMC ne-MC isetshenziswa kabanzi ekudleni okuphekwe ngokushisa, ikakhulukazi ekudleni okuthosiwe, ngoba iyi-gels eshisayo. E-Afrika, i-MC, i-HPMC, amaprotheni ommbila kanye ne-amylose asetshenziselwa ukuvimba uwoyela odlangile enhlangothini ebomvu ethosiwe, njengokufaka lezi zixazululo ezibonakalayo ezibomvana ezithambile, njengokucwilisa lezi zixazululo eziluhlaza ezibonakalayo kumafilimu adliwayo. Izinto ze-membrane ze-Dreappy MC zisebenza kakhulu esibaleni se-grease, ezinganciphisa ukumuncwa kendla ngo-49%. Ngokuvamile, amasampula acwilisa akhombisa ukumuncwa kwamafutha aphansi kunowokufafazwa.
4. MCFuthi i-HPMC nayo isetshenziswa kumasampula wesitashi anjengamabhola amazambane, i-batter, ama-potato chips kanye nenhlama ukuze uthuthukise ukusebenza kwesithiyo, imvamisa ngokufafaza. Ucwaningo lukhombisa ukuthi i-MC inokusebenza okungcono kakhulu kokuvimba umswakama kanye namafutha. Amandla okugcina amanzi ikakhulukazi ngenxa ye-hydrophility yayo ephansi. Ngokusebenzisa ama-microscope, kungabonakala ukuthi ifilimu ye-MC inama-adhesion amahle ekudleni okuthosiwe. Ucwaningo luye lwabonisa ukuthi ukuhlanganiswa kwe-HPMC kufafazwe kumabhola enkukhu kunokugcinwa kwamanzi okuhle futhi kunganciphisa kakhulu okuqukethwe kawoyela ngesikhathi sokuthosa. Okuqukethwe kwamanzi kwesampula yokugcina kungandiswa ngo-16.4%, okuqukethwe kwamafutha kungancishiswa ngo-17.9%, futhi okuqukethwe kwamafutha angaphakathi kungancishiswa ngo-33.7% .Ukusebenza kwamafutha okushaya ahlobene ne-gel ye-thermal ukusebenza kweI-HPMC. Esigabeni sokuqala sejeli, i-viscosity inyuka ngokushesha, ukubopha ama-intermolecular kwenzeka ngokushesha, futhi ikhambi gels ngo-50-90 ℃. Isendlalelo sejeli singavimba ukufuduka kwamanzi namafutha ngesikhathi sokuthosa. Ukungeza i-hydrogel kungqimba yangaphandle yemichilo yenkukhu ethosiwe efakwe kumvuthuluka wesinkwa kunganciphisa inkathazo yenqubo yokulungiselela, futhi kunganciphisa kakhulu ukumuncwa kwamafutha wenceku yenkukhu futhi kugcinwe izakhiwo ezihlukile zezinzwa zesampula.
I-5. Yize i-HPMC iyinto ehlelekile yefilimu edliwayo enezindawo ezinhle zemishini kanye nokumelana kwamanzi, inesabelo esincane semakethe. Kunezici ezimbili ezivimba uhlelo lwayo: Okokuqala, yijeli eshisayo, okungukuthi, i-viscoelastic eqinile efana ne-gel eyakheke emazingeni okushisa aphezulu, kepha ikhona kwisixazululo esiphansi kakhulu ekushiseni kwegumbi. Ngenxa yalokhu, i-matrix kumele ishaye kakade ishaywe futhi yomiswe emazingeni okushisa aphezulu ngesikhathi senqubo yokulungiselela. Ngaphandle kwalokho, kwinqubo yokuhlanganisa, ukufafaza noma ukucwilisa, isixazululo kulula ukugeleza phansi, sakha izinto zefilimu ezingalingani, zithinta ukusebenza kwamafilimu adliwayo. Ngaphezu kwalokho, lo msebenzi kufanele uqinisekise ukuthi yonke indawo yokukhiqiza igcinwa ngenhla kwama-70 ℃, ukuchitha ukushisa okuningi. Ngakho-ke, kuyadingeka ukunciphisa iphuzu layo le-gel noma ukwandisa ukubonakala kwalo kumazinga okushisa aphansi. Okwesibili, kuyabiza kakhulu, cishe yi-100000 yuan / ton.
Isikhathi sePosi: Apr-26-2024