ICarboxymethylcellulose (CMC) sisongezo esisebenzayo esisetyenziswa ngokubanzi kumashishini ahlukeneyo anjengokutya, amayeza, ukwenza iphepha, amalaphu, kunye nemigodi.Ithathwe kwi-cellulose yendalo, eninzi kwizityalo kunye nezinye izinto eziphilayo.I-CMC yipolima enyibilikayo emanzini eneempawu ezizodwa ezibandakanya i-viscosity, i-hydration, i-adhesion kunye nokubambelela.
Iimpawu zeCMC
I-CMC yinto ephuma kwiselulosi eguqulwe ngokwekhemikhali ngokwazisa amaqela e-carboxymethyl kwisakhiwo sayo.Olu hlengahlengiso luphucula ukunyibilika kunye ne-hydrophilicity ye-cellulose, ngaloo ndlela iphucula ukusebenza.Iipropati ze-CMC zixhomekeke kwisidanga sayo sokuthatha indawo (DS) kunye nobunzima bemolekyuli (MW).I-DS ichazwa njenge-avareji yenani lamaqela e-carboxymethyl kwiyunithi ye-glucose kwi-cellulose backbone, ngelixa i-MW ibonisa ubungakanani kunye nokusabalalisa kwamakhonkco e-polymer.
Enye yezinto eziphambili zeCMC kukunyibilika kwayo emanzini.I-CMC inyibilika ngokulula emanzini, yenza isisombululo se-viscous esineempawu ze-pseudoplastic.Oku kuziphatha kwe-rheological kubangelwa yintsebenziswano ye-intermolecular phakathi kwee-molecule ze-CMC, ezikhokelela ekunciphiseni kwe-viscosity phantsi koxinzelelo lwe-shear.Ubume be-pseudoplastic bezisombululo ze-CMC bubenza bafaneleke kwiintlobo ezahlukeneyo zezicelo ezifana ne-thickeners, i-stabilizers, kunye ne-agent yokumisa.
Olunye uphawu olubalulekileyo lwe-CMC bubuchule bayo bokwenza ifilim.Izisombululo zeCMC zinokuphoswa kwiifilimu ezineempawu ezibalaseleyo zoomatshini, elubala, kunye nokuguquguquka.Ezi filimu zinokusetyenziswa njengeengubo, i-laminates kunye nezinto zokupakisha.
Ukongeza, i-CMC ineepropati ezintle zokudibanisa kunye nokudibanisa.Yenza ibhondi eyomeleleyo enemigangatho eyahlukeneyo, kubandakanywa umthi, isinyithi, iplastiki kunye nelaphu.Le propati ibangele ukusetyenziswa kwe-CMC kwimveliso yeengubo, i-adhesives kunye neenki.
CMC viscosity
I-viscosity yezisombululo ze-CMC ixhomekeke kwizinto ezininzi ezifana noxinaniso, i-DS, i-MW, ubushushu, kunye ne-pH.Ngokubanzi, izisombululo ze-CMC zibonisa ii-viscosities eziphezulu kwiindawo eziphezulu, i-DS, kunye ne-MW.I-Viscosity inyuka ngokuhla kweqondo lokushisa kunye ne-pH.
I-viscosity yezisombululo ze-CMC ilawulwa yintsebenziswano phakathi kwamaketanga e-polymer kunye ne-solvent molecules kwisisombululo.Iimolekyuli zeCMC zinxibelelana neemolekyuli zamanzi ngeebhondi zehydrogen, zenza iqokobhe le-hydration elijikeleze amatyathanga epolymer.Eli qokobhe le-hydration linciphisa ukuhamba kwamakhonkco e-polymer, ngaloo ndlela ukwandisa i-viscosity yesisombululo.
Ukuziphatha kwe-rheological yezisombululo ze-CMC kubonakaliswa ngamagophe okuhamba, achaza ubudlelwane phakathi koxinzelelo lwe-chear kunye nesantya sokucheba isisombululo.Izisombululo zeCMC zibonisa indlela yokuqukuqela engeyiyo eyeNewtonian, nto leyo ethetha ukuba i-viscosity yabo iyatshintsha ngereyithi yokucheba.Kwizinga eliphantsi lokucheba, i-viscosity yezisombululo ze-CMC iphezulu, ngelixa kumazinga aphezulu okucheba, i-viscosity iyancipha.Oku kuchetywa kwe-chear kubangelwa ngamatyathanga epolymer alungelelaniswayo kunye nokwelula phantsi koxinzelelo lokucheba, okukhokelela ekunciphiseni amandla e-intermolecular phakathi kwamatyathanga kunye nokuncipha kwe-viscosity.
Ukusetyenziswa kwe-CMC
I-CMC isetyenziswa ngokubanzi kwiinkalo ezahlukeneyo ngenxa yeempawu zayo ezizodwa kunye nokuziphatha kwe-rheological.Kwishishini lokutya, i-CMC isetyenziswa njenge-thickener, stabilizer, emulsifier kunye nokuphucula ukuthungwa.Yongezwa kukutya okufana ne-ayisikrimu, iziselo, iisosi kunye neempahla ezibhakiweyo ukuphucula ukuthungwa kwazo, ukungaguquguquki kunye nobomi beshelufu.I-CMC ikwathintela ukwakheka kweekristale zomkhenkce ekutyeni okukhenkcezisiweyo, okukhokelela kwimveliso egudileyo, ekhrimu.
Kumashishini amayeza, i-CMC isetyenziswa njenge-binder, i-disintegrant kunye ne-ejenti yokukhululwa elawulwayo kwi-tablet formulations.Ukuphucula ukunyanzeliswa kunye ne-fluidity ye powder kwaye uqinisekise ukufana kunye nokuzinza kweepilisi.Ngenxa yeempawu zokuncamathelisa kwe-mucoadhesive kunye ne-bioadhesive, i-CMC ikwasetyenziswa njenge-excipient kwi-ophthalmic, impumlo, kunye nokwakhiwa komlomo.
Kushishino lwamaphepha, i-CMC isetyenziswa njengokongeza isiphelo esimanzi, isibophelelo sokugquma kunye ne-ejenti yokushicilela.Iphucula ukugcinwa kwe-pulp kunye ne-drainage, yonyusa amandla ephepha kunye nokuxinana, kwaye ibonelela ngomphezulu ogudileyo kunye nobengezela.I-CMC ikwasebenza njengomqobo wamanzi kunye neoyile, ikhusela i-inki okanye ezinye izinto ezingamanzi ekungeneni ephepheni.
Kushishino lwamalaphu, i-CMC isetyenziswa njenge-ejenti yokulinganisa, i-thickener yoshicilelo, kunye nokuncedisa ukudaya.Iphucula i-fiber adhesion, iphucula ukungena kombala kunye nokulungiswa, kunye nokunciphisa ukukhuhla kunye nemibimbi.I-CMC kwakhona inika ukuthamba kunye nokuqina kwelaphu, ngokuxhomekeke kwi-DS kunye ne-MW yepolymer.
Kwishishini lemigodi, i-CMC isetyenziswa njenge-flocculant, inhibitor kunye ne-rheology modifier ekusetyenzweni kwezimbiwa.Iphucula ukuhlaliswa kunye nokuhluzwa kwezinto eziqinileyo, inciphisa ukuhlukana kwi-ganggue yamalahle, kwaye ilawula i-viscosity yokumiswa kunye nokuzinza.I-CMC ikwanciphisa impembelelo yokusingqongileyo yenkqubo yemigodi ngokunciphisa ukusetyenziswa kweekhemikhali eziyityhefu kunye namanzi.
ukuququmbela
I-CMC sisongezo esisebenzisekayo nesixabisekileyo esibonisa iipropati ezizodwa kunye ne-viscosity ngenxa yesakhiwo sayo sekhemikhali kunye nokunxibelelana namanzi.I-solubility yayo, amandla okwenza ifilimu, ukubopha kunye neempawu zokubambelela zenza ukuba zilungele izicelo ezahlukeneyo kumacandelo okutya, amayeza, ephepha, e-textile kunye nemigodi.I-viscosity yezisombululo ze-CMC inokulawulwa zizinto ezininzi, ezifana noxinaniso, i-DS, i-MW, ubushushu, kunye ne-pH, kwaye inokubonakaliswa ngokuziphatha kwayo kwe-pseudoplastic kunye ne-shear-thinning.I-CMC inefuthe elihle kumgangatho, ukusebenza kakuhle kunye nokuzinza kweemveliso kunye neenkqubo, nto leyo eyenza ibe yinxalenye ebalulekileyo yoshishino lwangoku.
Ixesha lokuposa: Sep-25-2023