Mokhoa oa Tlhahiso le Litšobotsi tsa Sodium Carboxymethyl Cellulose

Sodium carboxymethyl cellulose (Na-CMC) ke polima e qhibilihang ka metsing e nkiloeng ho selulose, e sebelisoang haholo lits'ebetsong tse fapaneng tsa indasteri joalo ka lijo, meriana, litlolo, masela le ho cheka oli. E tsebahala ka ho tenya, ho tsitsisa le ho tlama ha eona. Sehloohong sena, re tla tšohla mokhoa oa tlhahiso le litšobotsi tsa sodium carboxymethyl cellulose.

Mokhoa oa Tlhahiso ea Sodium Carboxymethyl Cellulose

Tlhahiso ea Na-CMC e kenyelletsa mehato e mengata, ho kenyelletsa le ho ntšoa ha selulose ho tloha makhasi a lehong, lithareng tsa k'hothone, kapa mehloling e meng, ho lateloe ke phetoho ea selulose ho theha lihlopha tsa carboxymethyl. Ts'ebetso ea tlhahiso ea Na-CMC e ka akaretsoa ka tsela e latelang:

1. Cellulose Extraction: Cellulose e ntšoa ho tloha ka lehong la lehong kapa mehloling e meng ka letoto la phekolo ea mechine le ea lik'hemik'hale, ho akarelletsa le pulping, bleaching, le ho hloekisa.
2. Kalafo ea Alkali: Selulose e nkiloeng e phekoloa ka tharollo e matla ea alkaline, hangata sodium hydroxide (NaOH), ho ruruha likhoele tsa cellulose le ho pepesa lihlopha tsa hydroxyl tse sebetsang.
3. Etherification: Likhoele tsa selulose tse ruruhileng li sebetsa ka sodium monochloroacetate (SMCA) ka pel'a motsoako oa alkaline joalo ka sodium carbonate (Na2CO3) ho hlahisa lihlopha tsa carboxymethyl mokokotlong oa cellulose.
4. Neutralization: The carboxymethylated cellulose e ntan'o fokotsoa ka acid e kang hydrochloric acid (HCl) kapa sulfuric acid (H2SO4) ho theha Na-CMC.
5. Ho Hloekisa le ho Omisa: Na-CMC e hloekisoa ka ho hlatsoa le ho sefa ho tlosa litšila leha e le life ebe e omisoa ho fumana phofo e sa lefelloeng.

Litšobotsi tsa Sodium Carboxymethyl Cellulose

Thepa ea Na-CMC e ka fapana ho latela tekanyo ea substitution (DS), e bolelang palo ea lihlopha tsa carboxymethyl ho unit ea anhydroglucose (AGU) ea selulose. Tse ling tsa litšobotsi tsa bohlokoa tsa Na-CMC ke:

1. Solubility: Na-CMC e qhibiliha haholo ke metsi 'me e ka etsa tharollo e hlakileng, e hlakileng ka metsing.
2. Viscosity: The viscosity ea tharollo ea Na-CMC e itšetlehile ka mahloriso, DS, le boima ba limolek'hule tsa polymer. Na-CMC e tsejoa ka thepa ea eona e matla ea ho tenya mme e ka sebelisoa ho eketsa viscosity ea tharollo le ho emisoa.
3. pH Stability: Na-CMC e tsitsitse ho feta mefuta e mengata ea pH ea boleng, ho tloha ho acidic ho ea ho alkaline, ho etsa hore e loketse ho sebelisoa lits'ebetsong tse fapaneng.
4. Mamello ea Letsoai: Na-CMC e mamella letsoai haholo 'me e ka boloka viscosity ea eona le botsitso boteng ba electrolyte.
5. Thermal Stability: Na-CMC e tsitsitse mocheso o phahameng mme e ka sebelisoa lits'ebetsong tse fapaneng tsa indasteri tse hlokang maemo a phahameng a mocheso.
6. Biodegradability: Na-CMC e ka bola 'me e ka lahleloa ka mokhoa o sireletsehileng tikolohong.

Qetello

Sodium carboxymethyl cellulose ke polima e feto-fetohang e sebelisoang haholo lits'ebetsong tse fapaneng tsa indasteri ka lebaka la thepa ea eona e matla ea botenya, e tsitsitseng le e tlamang. Ts'ebetso ea tlhahiso ea Na-CMC e kenyelletsa ho ntšoa ha selulose ho lateloang ke phetoho ea selulose ho theha lihlopha tsa carboxymethyl. Na-CMC e na le litšobotsi tse 'maloa tse kang solubility, viscosity, pH botsitso, mamello ea letsoai, botsitso ba mocheso, le biodegradability, tse etsang hore e loketse ho sebelisoa lits'ebetsong tse fapaneng. Thepa ea Na-CMC e ka fetoloa ka ho laola tekanyo ea phetoho, boima ba limolek'hule le mahloriso, e leng se etsang hore e be sesebelisoa sa bohlokoa bakeng sa mekhoa e fapaneng ea indasteri.