Izakhiwo kanye ne-viscosity ye-CMC

I-Carboxymethylcellulose (CMC) iyisengezo esisebenzayo esisetshenziswa kabanzi ezimbonini ezahlukahlukene njengokudla, ezemithi, ukwenza iphepha, izindwangu, nezimayini.Itholakala ku-cellulose yemvelo, egcwele izitshalo nezinye izinto eziphilayo.I-CMC iyi-polymer encibilika emanzini enezinto ezihlukile ezihlanganisa i-viscosity, i-hydration, i-adhesion kanye nokunamathela.

Izici ze-CMC

I-CMC iwukuphuma kwe-cellulose eshintshwa amakhemikhali ngokwethula amaqembu e-carboxymethyl esakhiweni sayo.Lokhu kuguqulwa kuthuthukisa ukuncibilika kanye ne-hydrophilicity ye-cellulose, ngaleyo ndlela kuthuthukise ukusebenza.Izakhiwo ze-CMC zincike ezingeni layo lokushintshwa (DS) nesisindo samangqamuzana (MW).I-DS ichazwa njengesilinganiso senani lamaqembu e-carboxymethyl ngeyunithi ngayinye ye-glucose kumgogodla we-cellulose, kuyilapho i-MW ikhombisa ubukhulu nokusabalalisa kwamaketanga e-polymer.

Enye yezinto ezibalulekile ze-CMC ukuncibilika kwayo emanzini.I-CMC incibilika kalula emanzini, yakha isixazululo se-viscous esinezici ze-pseudoplastic.Lokhu kuziphatha kwe-rheological kubangelwa ukusebenzisana kwe-intermolecular phakathi kwama-molecule e-CMC, okuholela ekwehleni kwe-viscosity ngaphansi kwengcindezi ye-shear.Imvelo ye-pseudoplastic yezixazululo ze-CMC izenza zifanelekele izinhlelo zokusebenza ezihlukahlukene ezifana nama-thickeners, stabilizers, nama-agent amisayo.

Esinye isici esibalulekile se-CMC yikhono layo lokwenza amafilimu.Izixazululo ze-CMC zingaphonswa kumafilimu anezakhiwo ezinhle kakhulu zemishini, izinto ezibonakalayo, kanye nokuguquguquka.Lawa mafilimu angasetshenziswa njengezingubo zokugqoka, ama-laminates kanye nezinto zokupakisha.

Ngaphezu kwalokho, i-CMC inezakhiwo ezinhle zokuhlanganisa nokuhlanganisa.Yakha isibopho esiqinile esinezindawo ezihlukene, okuhlanganisa ukhuni, insimbi, ipulasitiki nendwangu.Le ndawo iholele ekusetshenzisweni kwe-CMC ekukhiqizeni ama-coatings, ama-adhesives kanye noyinki.

I-viscosity ye-CMC

I-viscosity yezixazululo ze-CMC incike ezintweni ezimbalwa njengokugxilisa ingqondo, i-DS, MW, izinga lokushisa, ne-pH.Ngokuvamile, izixazululo ze-CMC zibonisa ama-viscosity aphezulu ezindaweni eziphezulu, i-DS, ne-MW.I-viscosity nayo iyanda ngokuncipha kwezinga lokushisa kanye ne-pH.

I-viscosity yezixazululo ze-CMC ilawulwa ukuxhumana phakathi kwamaketanga e-polymer nama-molecule e-solvent esixazululweni.Ama-molecule e-CMC asebenzisana nama-molecule wamanzi ngamabhondi e-hydrogen, akhe igobolondo le-hydration elizungeze amaketanga e-polymer.Leligobolondo le-hydration linciphisa ukuhamba kwamaketanga e-polymer, ngaleyo ndlela likhulise i-viscosity yesisombululo.

Ukuziphatha kwe-rheological yezixazululo ze-CMC kubonakala ngamajika okugeleza, achaza ubudlelwano phakathi kokucindezeleka kokugunda kanye nesilinganiso sokugunda kwesixazululo.Izixazululo ze-CMC zibonisa ukuziphatha kokugeleza okungekona okwaseNewtonian, okusho ukuthi i-viscosity yazo iyashintsha ngesilinganiso sokugunda.Ngamazinga aphansi e-shear, i-viscosity yezixazululo ze-CMC iphakeme, kuyilapho kumazinga aphezulu okugunda, i-viscosity iyancipha.Lokhu kuziphatha kokugunda kwe-shear kungenxa yamaketanga e-polymer aqondana futhi anwebeka ngaphansi kwengcindezi yokugunda, okuholela ekunciphiseni kwamandla e-intermolecular phakathi kwamaketanga kanye nokuncipha kwe-viscosity.

Ukusetshenziswa kwe-CMC

I-CMC isetshenziswa kabanzi emikhakheni ehlukene ngenxa yezakhiwo zayo ezihlukile nokuziphatha kwe-rheological.Embonini yokudla, i-CMC isetshenziswa njenge-thickener, stabilizer, emulsifier kanye nesithuthukisi sokuthungwa.Yengezwa ekudleni okufana no-ayisikhilimu, iziphuzo, amasoso kanye nezinto ezibhakiwe ukuze kuthuthukiswe ukuthungwa kwazo, ukungaguquguquki nempilo yeshelufu.I-CMC iphinde ivimbele ukwakheka kwamakristalu eqhwa ekudleni okuqandisiwe, okuholela kumkhiqizo obushelelezi, okhilimu.

Embonini yezemithi, i-CMC isetshenziswa njenge-binder, disintegrant kanye ne-ejenti yokukhululwa elawulwayo ekwakhiweni kwethebhulethi.Thuthukisa ukucindezelwa kanye ne-fluidity ye-powder futhi uqinisekise ukufana nokuzinza kwamaphilisi.Ngenxa yezakhiwo zayo zokunamathisela i-mucoadhesive kanye ne-bioadhesive, i-CMC iphinde isetshenziswe njenge-excipient ekwakhiweni kwamehlo, amakhala, kanye nomlomo.

Embonini yamaphepha, i-CMC isetshenziswa njengesithasiselo sokuphela esimanzi, i-coating binder kanye ne-ejenti yokucindezela usayizi.Ithuthukisa ukugcinwa kwe-pulp kanye nokukhipha amanzi, ikhuphule amandla ephepha kanye nokuminyana, futhi inikeza indawo ebushelelezi necwebezelayo.I-CMC futhi isebenza njengesithiyo samanzi namafutha, ivimbela uyinki noma olunye uketshezi ekungeneni ephepheni.

Embonini yendwangu, i-CMC isetshenziswa njenge-ejenti yokulinganisa, i-printing thickener, kanye nensiza yokudaya.Ithuthukisa i-fiber adhesion, ithuthukisa ukungena kombala kanye nokulungisa, futhi inciphisa ukungqubuzana nemibimbi.I-CMC iphinde inikeze ukuthamba nokuqina kwendwangu, kuye ngokuthi i-DS kanye ne-MW ye-polymer.

Embonini yezimayini, i-CMC isetshenziswa njenge-flocculant, inhibitor kanye ne-rheology modifier ekusetshenzisweni kwezimbiwa.Ithuthukisa ukuhlaliswa kanye nokuhlunga kwezinto eziqinile, inciphisa ukuhlukana ne-ganggue yamalahle, futhi ilawula i-viscosity yokumiswa nokuzinza.I-CMC futhi yehlisa umthelela wemvelo wenqubo yezimayini ngokunciphisa ukusetshenziswa kwamakhemikhali anobuthi namanzi.

Ekuphetheni

I-CMC iyisengezo esisebenza ngezindlela eziningi nesibalulekile esibonisa izakhiwo eziyingqayizivele kanye ne-viscosity ngenxa yesakhiwo sayo samakhemikhali nokusebenzisana namanzi.Ukuncibilika kwayo, amandla okwenza ifilimu, izakhiwo zokubopha kanye nokunamathela kuyenza ifaneleke ukusetshenziswa okuhlukene emkhakheni wokudla, owemithi, wephepha, wezindwangu kanye nezimayini.I-viscosity yezixazululo ze-CMC ingalawulwa yizinto ezimbalwa, njengokugxilisa ingqondo, i-DS, i-MW, izinga lokushisa, ne-pH, futhi ingabonakala ngokuziphatha kwayo kwe-pseudoplastic kanye nokunciphisa i-shear-thinning.I-CMC inomthelela omuhle kwikhwalithi, ukusebenza kahle kanye nokusimama kwemikhiqizo nezinqubo, okuyenza ibe yingxenye ebalulekile yemboni yesimanje.