Iipropati kunye ne-viscosity ye-CMC

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 nee-arhente zokumisa.

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 ngamakhonkco e-polymer alungelelaniswayo kunye nokwelula phantsi koxinzelelo lwe-chear, 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 kwiphepha.

Kushishino lwamalaphu, i-CMC isetyenziswa njenge-ejenti yokulinganisa, i-thickener yokushicilela, kunye nokuncedisa ukudaya. Iphucula i-fiber adhesion, iphucula ukungena kombala kunye nokulungiswa, kunye nokunciphisa ukukhuhla kunye nemibimbi. I-CMC ikwanika 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.