Carboxymethyl Cellulose (CMC) le methyl cellulose (MC) ke lintho tse peli tse nkiloeng ho cellulose tse sebelisoang haholo liindastering tse ngata. Le hoja ka bobeli li nkiloe ho selulose ea tlhaho, ka lebaka la mekhoa e fapaneng ea phetoho ea lik'hemik'hale, CMC le MC li na le phapang e kholo ea sebopeho sa lik'hemik'hale, thepa ea 'mele le ea lik'hemik'hale, le masimo a kopo.
1. Mohloli le kakaretso ea motheo
Carboxymethylcellulose (CMC) e hlophisitsoe ka ho arabela selulose ea tlhaho ka chloroacetic acid kamora kalafo ea alkali. Ke ntho e tsoang ho cellulose e qhibilihang ka metsing ea anionic. CMC hangata e teng ka sebōpeho sa letsoai la sodium, kahoo e boetse e bitsoa Sodium Carboxymethyl Cellulose (Na-CMC). Ka lebaka la ts'ebetso ea eona e ntle ea ho solubility le viscosity, CMC e sebelisoa haholo indastering ea lijo, meriana, ho cheka oli, masela le liindasteri tsa pampiri.
Methylcellulose (MC) e entsoe ka methylating cellulose e nang le methyl chloride (kapa li-reagents tse ling tsa methylating). Ke ntho e tsoang ho cellulose e seng ea ionic. MC e na le thepa ea gel ea mocheso, tharollo e tiisa ha e futhumala ebile e qhibiliha ha e pholile. Ka lebaka la thepa ea eona e ikhethang, MC e sebelisoa haholo ho thepa ea mohaho, litokisetso tsa meriana, liphahlo, lijo le liindasteri tse ling.
2. Sebopeho sa lik'hemik'hale
Sebopeho sa motheo sa CMC ke kenyelletso ea sehlopha sa carboxymethyl (-CH2COOH) karolong ea tsoekere ea β-1,4-glucosidic bond ea cellulose. Sehlopha sena sa carboxyl se etsa hore e be anionic. Sebopeho sa limolek'hule tsa CMC se na le palo e kholo ea lihlopha tsa sodium carboxylate. Lihlopha tsena li arohanngoa habonolo metsing, ho etsa hore limolek'hule tsa CMC li qosoe hampe, kahoo li fane ka metsi a matle a ho qhibiliha le thepa e teteaneng.
Sebopeho sa limolek'hule tsa MC ke ho kenngoa ha lihlopha tsa methoxy (-OCH3) ka har'a limolek'hule tsa cellulose, 'me lihlopha tsena tsa methoxy li nkela karolo ea lihlopha tsa hydroxyl limolek'huleng tsa cellulose. Ha ho na lihlopha tsa ionized sebopeho sa MC, ka hona ha se ionic, ho bolelang hore ha e ikarole kapa ho qosoa ka tharollo. Lintho tsa eona tse ikhethang tsa li-gel tsa mocheso li bakoa ke boteng ba lihlopha tsena tsa methoxy.
3. Solubility le thepa ea 'mele
CMC e na le ho qhibiliha ha metsi hantle 'me e ka qhibiliha ka potlako metsing a batang ho etsa mokelikeli o hlakileng oa viscous. Kaha ke polymer ea anionic, ho qhibiliha ha CMC ho angoa ke matla a ionic le boleng ba pH ba metsi. Libakeng tse nang le letsoai le phahameng kapa maemo a acid e matla, ho qhibiliha le botsitso ba CMC ho tla fokotseha. Ho phaella moo, viscosity ea CMC e batla e tsitsitse ka mocheso o fapaneng.
The solubility ea MC metsing e itšetlehile ka mocheso. E ka qhibiliha ka metsing a batang empa e tla etsa gel ha e futhumala. Thepa ena ea gel e futhumatsang e thusa MC ho bapala mesebetsi e ikhethang indastering ea lijo le thepa ea kaho. Viscosity ea MC e fokotseha ha mocheso o ntse o eketseha, 'me o na le khanyetso e ntle ea ho senyeha ha enzymatic le botsitso.
4. Litšobotsi tsa viscosity
Viscosity ea CMC ke e 'ngoe ea litšobotsi tsa eona tsa bohlokoa tsa' mele. Viscosity e amana haufi-ufi le boima ba eona ba molek'hule le tekanyo ea ho fetola. Viscosity ea tharollo ea CMC e na le phetoho e ntle, hangata e hlahisa viscosity e phahameng maemong a tlase (1% -2%), kahoo hangata e sebelisoa e le setei, se tsitsitseng le se emisang.
Viscosity ea MC e boetse e amana le boima ba eona ba molek'hule le tekanyo ea ho fetola. MC e nang le likhato tse fapaneng tsa ho fetola e na le litšobotsi tse fapaneng tsa viscosity. MC e boetse e na le phello e ntle ea ho thibela tharollo, empa ha e futhumetse mocheso o itseng, tharollo ea MC e tla gel. Thepa ena ea gelling e sebelisoa haholo indastering ea kaho (joalo ka gypsum, samente) le ts'ebetso ea lijo ( joalo ka ho tenya, ho theha filimi, joalo-joalo).
5. Libaka tsa kopo
CMC e sebelisoa hangata joalo ka motenya, emulsifier, stabilizer, le moemeli ea emisang indastering ea lijo. Ka mohlala, ka ice cream, yogurt le lino tsa litholoana, CMC e ka thibela ka katleho ho arohana ha metsoako le ho ntlafatsa tatso le botsitso ba sehlahisoa. Indastering ea petroleum, CMC e sebelisoa e le moemeli oa phekolo ea seretse ho thusa ho laola metsi le tahlehelo ea mokelikeli oa maro a ho cheka. Ntle le moo, CMC e boetse e sebelisoa bakeng sa phetoho ea pulp indastering ea lipampiri le joalo ka moemeli oa boholo indastering ea masela.
MC e sebelisoa haholo indastering ea kaho, haholo-holo ka seretse se omeletseng, li-adhesive tsa lithaele le li-putty powders. Joalo ka moemeli oa motenya le moemeli oa ho boloka metsi, MC e ka ntlafatsa ts'ebetso ea kaho le matla a tlamahano. Indastering ea meriana, MC e sebelisoa e le li-binders tsa matlapa, lisebelisoa tse sa khaotseng le lisebelisoa tsa lebota la capsule. Lintho tsa eona tsa thermogelling li nolofalletsa tokollo e laoloang mekhoeng e itseng. Ntle le moo, MC e boetse e sebelisoa indastering ea lijo joalo ka motenya, stabilizer le emulsifier bakeng sa lijo, joalo ka li-sauces, li-filling, mahobe, jj.
6. Polokeho le biodegradability
CMC e nkuoa e le tlatsetso e sireletsehileng ea lijo. Lithuto tse pharalletseng tsa toxicological li bonts'itse hore CMC ha e kotsi 'meleng oa motho ka litekanyetso tse khothaletsoang. Kaha CMC ke motsoako o thehiloeng ho selulose ea tlhaho 'me e na le biodegradability e ntle, e batla e le botsoalle tikolohong' me e ka senngoa ke likokoana-hloko.
MC e boetse e nkuoa e le tlatsetso e sireletsehileng 'me e sebelisoa haholo meriana, lijo le litlolo. Sebopeho sa eona se seng sa ionic se etsa hore e be e tsitsitseng haholo ho vivo le in vitro. Leha MC e sa senyehe joalo ka CMC, e boetse e khona ho senngoa ke likokoana-hloko tlas'a maemo a itseng.
Le ha carboxymethyl cellulose le methyl cellulose ka bobeli li nkiloe ho selulose ea tlhaho, li na le litšobotsi tse fapaneng ts'ebetsong e sebetsang ka lebaka la libopeho tsa tsona tse fapaneng tsa lik'hemik'hale, thepa ea 'mele le likarolo tsa ts'ebeliso. CMC e sebelisoa haholo masimong a lijo, meriana le liindasteri ka lebaka la ho qhibiliha ha eona hantle ha metsi, ho tenya le thepa ea ho emisoa, ha MC e ntse e le maemong a bohlokoa indastering ea kaho, ea meriana le ea lijo ka lebaka la thepa ea eona ea gel ea mocheso le botsitso. Ka bobeli li na le lits'ebetso tse ikhethang indastering ea sejoale-joale, 'me ka bobeli ke lisebelisoa tse tala le tse se nang tikoloho.
Nako ea poso: Oct-18-2024