CMC sebelisa lijong
Sodium carboxymethyl cellulose (carboxymethyl cellulose, sodium CMC) ke motsoako oa carboxymethylated oa cellulose, eo hape e tsejoang e le serenene sa cellulose, 'me ke chese ea bohlokoa ka ho fetisisa ea ionic cellulose.
CMC hangata ke motsoako oa anionic polymer o fumanoang ka ho arabela cellulose ea tlhaho ka caustic alkali le monochloroacetic acid. Boima ba limolek'hule tsa motsoako ona bo tloha ho likete tse 'maloa ho isa ho milione e le' ngoe. lefito la yuniti ya molek'hule
CMC ke karolo ea phetoho ea cellulose ea tlhaho. Hona joale, Mokhatlo oa Lijo le Temo oa Machaba a Kopaneng (FAO) le Mokhatlo oa Lefatše oa Bophelo (WHO) li e bitsitse ka molao "cellulose e fetotsoeng". The synthesis method of sodium carboxymethyl cellulose e qapiloe ke German E.Jansen ka 1918, 'me e ile ea fuoa tokelo ea molao ka 1921' me ea tsejoa lefatšeng ka bophara, ho tloha ka nako eo e 'nile ea rekisoa Europe.
CMC e ne e sebelisoa feela bakeng sa lihlahisoa tse tala, joalo ka colloid le binder. Ho tloha 1936 ho isa 1941, lipatlisiso tsa ts'ebeliso ea indasteri ea sodium carboxymethyl cellulose li ne li le mafolofolo, 'me litokelo tse ngata tse fanang ka leseli li ile tsa hatisoa. Nakong ea Ntoa ea II ea Lefatše, Jeremane e ile ea sebelisa CMC ho li-detergents tsa maiketsetso e le ntho e thibelang ho tsosolosoa hape, 'me e le sebaka sa marenene a tlhaho (joaloka gelatin, gum arabic), indasteri ea CMC e tsoetse pele haholo.
CMC e sebelisoa haholo ho petroleum, geological , lik'hemik'hale tsa letsatsi le letsatsi, lijo, meriana le liindasteri tse ling, tse tsejoang e le "industrial monosodium glutamate".
01KAROLO
Thepa ea sebopeho sa CMC
CMC ke phofo e tšoeu kapa e mosehla hanyane, granular kapa fibrous solid. Ke lik'hemik'hale tsa macromolecular tse khonang ho monya metsi le ho ruruha. Ha e ruruha ka metsing, e ka etsa sekhomaretsi sa viscous se bonaletsang. PH ea ho emisoa ha metsi ke 6.5-8.5. Motsoako ona ha o qhibilihe ka har'a metsoako ea tlhaho e kang ethanol, ether, acetone le chloroform.
Solid CMC e tsitsitse ho isa mocheso o khanyang le oa kamore, 'me e ka bolokoa nako e telele sebakeng se omileng. CMC ke mofuta oa cellulose ether. Hangata e entsoe ka linter e khutšoanyane ea k'hothone (li-cellulose content ho fihlela ho 98%) kapa makhasi a lehong, a phekoloang ka sodium hydroxide ebe o itšoara ka sodium monochloroacetate. Boima ba molek'hule ea motsoako ke 6400 (± 1000). Hangata ho na le mekhoa e 'meli ea ho lokisetsa: mokhoa oa metsi a mashala le mokhoa oa ho qhibiliha. Ho boetse ho na le likhoele tse ling tsa semela tse sebelisoang ho etsa CMC.
02 KAROLO
Likarolo le Lisebelisoa
CMC ha se feela emulsion stabilizer e ntle le e teteaneng lits'ebetsong tsa lijo, empa hape e na le serame se setle haholo le botsitso ba ho qhibiliha, 'me e ka ntlafatsa tatso ea sehlahisoa le ho lelefatsa nako ea polokelo.
Ka 1974, Mokhatlo oa Lijo le Temo oa Machaba a Kopaneng (FAO) le Mokhatlo oa Lefatše oa Bophelo (WHO) li amohetse tšebeliso ea CMC e hloekileng bakeng sa lijo ka mor'a lithuto le liteko tse matla tsa baeloji le chefo. Tekanyetso ea machaba e bolokehileng (ADI) ke 25mg/kg boima ba 'mele ka letsatsi.
2.1 Thickening le emulsification botsitso
Ho ja CMC ho ka bapala karolo ho emulsification le botsitso ba lino tse nang le oli le protheine. Sena ke hobane CMC e fetoha colloid e tsitsitseng e hlakileng ka mor'a hore e qhibilihe ka metsing, 'me likaroloana tsa protheine li fetoha likaroloana tse nang le tefiso e tšoanang tlas'a tšireletso ea filimi ea colloid, e ka etsang hore likaroloana tsa protheine li be boemong bo tsitsitseng. E boetse e na le phello e itseng ea emulsification, kahoo ka nako e ts'oanang, e ka fokotsa tsitsipano ea holim'a metsi pakeng tsa mafura le metsi, e le hore mafura a ka kenngoa ka ho feletseng.
CMC e ka ntlafatsa botsitso ba sehlahisoa hobane ha boleng ba pH ba sehlahisoa bo kheloha sebakeng sa isoelectric sa protheine, sodium carboxymethyl cellulose e ka etsa sebopeho se rarahaneng ka protheine, e ka ntlafatsang botsitso ba sehlahisoa.
2.2 Eketsa bongata
Tšebeliso ea CMC ka ice cream e ka eketsa ho atolosoa ha ice cream, ho ntlafatsa lebelo la ho qhibiliha, ho fana ka sebōpeho se setle le tatso, le ho laola boholo le kholo ea likristale tsa leqhoa nakong ea lipalangoang le polokelo. Chelete e sebelisitsoeng ke 0.5% ea kakaretso. Karolelano ea eketsoa.
Sena ke hobane CMC e na le ho boloka metsi hantle le dispersibility, 'me organically kopanya likaroloana tsa protheine, globules mafura le limolek'hule tsa metsi ka colloid ho theha junifomo le tsamaiso e tsitsitseng.
2.3 Hydrophilicity le ho khutlisetsa metsi 'meleng
Thepa ena e sebetsang ea CMC e atisa ho sebelisoa tlhahiso ea bohobe, e ka etsang seaparo sa mahe a linotši, ho eketsa molumo, ho fokotsa slag, hape ho na le phello ea ho futhumala le ho ncha; li-noodle tse kentsoeng ka CMC li na le ho boloka metsi hantle, ho hanyetsa ho pheha le tatso e ntle.
Sena se khethoa ke sebopeho sa limolek'hule tsa CMC, e leng motsoako oa cellulose o nang le palo e kholo ea lihlopha tsa hydrophilic ka har'a ketane ea limolek'hule: -OH sehlopha, -COONa sehlopha, kahoo CMC e na le hydrophilicity e molemo ho feta cellulose le matla a ho tšoara metsi.
2.4 Gelation
Thixotropic CMC e bolela hore liketane tsa macromolecular li na le palo e itseng ea litšebelisano 'me li atisa ho theha sebopeho sa likarolo tse tharo. Ka mor'a hore ho thehoe sebopeho sa likarolo tse tharo, viscosity ea tharollo e eketseha, 'me ka mor'a hore sebopeho sa mahlakore a mararo se robehe, viscosity e fokotseha. Ketsahalo ea thixotropic ke hore phetoho e bonahalang ea viscosity e itšetlehile ka nako.
Thixotropic CMC e phetha karolo ea bohlokoa tsamaisong ea gelling mme e ka sebelisoa ho etsa jelly, jeme le lijo tse ling.
2.5 E ka sebelisoa e le moemeli oa ho hlakisa, foam stabilizer, eketsa tatso
CMC e ka sebediswa tlhahisong ya veine ho etsa hore tatso e be bonolo le ho nona, mme tatso ya morao e be telele; tlhahiso ea biri, e ka sebelisoa e le foam stabilizer bakeng sa biri, ho etsa foam e ruileng le e tšoarellang le ho ntlafatsa tatso.
CMC ke polyelectrolyte, e ka nkang karolo liketsong tse fapaneng tsa veine ho boloka botsitso ba 'mele oa veine. Ka nako e ts'oanang, e boetse e kopanya le likristale tse entsoeng, ho fetola sebopeho sa likristale, ho fetola maemo a likristale ka veine, le ho baka pula. Ho kopanya lintho.
Nako ea poso: Nov-07-2022