CMC e sebelisa indastering ea litlolo

Carboxymethyl cellulose (eo hape e tsejoang e le CMC le sodium carboxymethyl cellulose) e ka hlalosoa e le polymer e qhibilihang ka metsing ea anionic, e hlahisoang ho tsoa selulose ea tlhaho ka etherification, e nkelang sehlopha sa hydroxyl sebaka sa carboxymethyl selulose Chain carboxymethyl cellulose e sebelisoa e le setlamo, thickener, suspending agent le filler lits'ebetsong tse fapaneng.

Molao-motheo oa ho itšoara

Lits'ebetso tsa mantlha tsa lik'hemik'hale tsa CMC ke karabelo ea alkalization ea selulose le alkali ho theha alkali cellulose le karabelo ea etherification ea alkali cellulose le monochloroacetic acid.

Mohato oa 1: Alkalization: [C6H7O2(OH) 3]n + nNaOH→[C6H7O2(OH) 2ONa ]n + nH2O

Mohato oa 2: Etherification: [C6H7O2(OH) 2ONa ]n + nClCH2COONA→[C6H7O2(OH) 2OCH2COONA ]n + nNaCl

Tlhaho ea lik'hemik'hale

Sehlahisoa sa cellulose se nang le carboxymethyl substituent se lokisoa ka ho phekola cellulose ka sodium hydroxide ho etsa alkali cellulose, ebe e arabela ka monochloroacetic acid. Yuniti ea tsoekere e etsang selulose e na le lihlopha tse 3 tsa hydroxyl tse ka nkeloang sebaka, kahoo lihlahisoa tse nang le likhato tse fapaneng tsa phetoho li ka fumaneha. Ka karolelano, 1mmol ea carboxymethyl e hlahisoa ka 1g ea boima bo omileng. Ha e qhibilihe ka metsing 'me e hlapolla asiti, empa e ka ruruha' me ea sebelisoa bakeng sa ion exchange chromatography. PKa ea carboxymethyl e ka bang 4 metsing a hloekileng le hoo e ka bang 3.5 ho 0.5mol / L NaCl. Ke motsoako o fokolang oa asiti ea asiti 'me hangata o sebelisoa bakeng sa karohano ea liprotheine tse sa nke lehlakore le tsa mantlha pH 4 kapa ho feta. Ba nang le lihlopha tse fetang 40% tsa hydroxyl tse nkeloang sebaka ke carboxymethyl li ka qhibiliha ka metsing ho etsa tharollo e tsitsitseng ea colloidal high-viscosity.

Litšobotsi tsa sehlahisoa sasesepa sehlopha sa CMC

Ka mor'a ho kenngoa ho sesepa, ho lumellana ho phahame, ho hlakile, 'me ha ho khutlele ho tšesaane;

E ka khona ho thibela ka katleho le ho tsitsisa sebopeho sa sesepa sa metsi;

Ho eketsa phofo ea ho hlatsoa le sesepa sa metsi ho ka thibela litšila tse hlatsoitsoeng hore li se ke tsa lula holim'a lesela hape. Ho eketsa 0.5-2% ho sesepa sa maiketsetso se ka finyella liphello tse khotsofatsang;

CMC e sebelisa indastering ea litlolo, Haholotsepamisa maikutlo ho emulsification le thepa e sireletsang colloid ea CMC. Anion e hlahisoang nakong ea ho hlatsoa ka nako e le 'ngoe e ka etsa hore holim'a ho hlatsoa le likaroloana tsa litšila li qosoe hampe, e le hore likaroloana tsa litšila li be le karohano ea mekhahlelo karolong ea metsi' me li be le phello e ts'oanang holim'a metsi a tiileng. Repellency, e thibela litšila hore li se ke tsa kenngoa hape holim'a liaparo, li ka boloka bosoeu ba masela a masoeu, le mebala e khanyang ea masela a mebala.

Mosebetsi ea CMC kasesepa

1. E teteaneng, e qhalakanya le e emulsifying, e ka monya matheba a mafura ho pota-pota matheba ho phuthela matheba a mafura, e le hore matheba a mafura a emisoa le ho qhalakanngoa ka metsing, 'me a thehe filimi ea hydrophilic holim'a lintho tse hlatsoitsoeng, kahoo a thibela matheba a mafura ho tloha ka ho toba ho kopana le lintho tse hlatsoitsoeng .
2. Boemo bo phahameng ba ho nkela sebaka le ho tšoana, pepeneneng e ntle;
3. Dispersibility e ntle metsing le ho hanyetsa hantle ha resorption;
4. Super viscosity e phahameng le botsitso bo botle.