I-Carboxymethylcellulose (CMC) sisongezelelo esisebenzayo esisetyenziswa kakhulu kumashishini ahlukeneyo afana nokutya, amayeza, ukwenza amaphepha, amalaphu, kunye nokwemba. Ivela kwi-cellulose yendalo, efumaneka kakhulu kwizityalo nakwezinye izinto zebhayoloji. I-CMC yi-polymer enyibilikayo emanzini eneempawu ezikhethekileyo eziquka i-viscosity, i-hydration, i-adhesion kunye ne-adhesion.
Iimpawu zeCMC
I-CMC yi-cellulose derivative eguqulwa ngokweekhemikhali ngokungenisa amaqela e-carboxymethyl kwisakhiwo sayo. Olu tshintsho luphucula ukunyibilika kunye nokuphilizeka kwe-cellulose, ngaloo ndlela kuphucula ukusebenza kwayo. Iimpawu ze-CMC zixhomekeke kwinqanaba layo lokutshintshwa (DS) kunye nobunzima be-molecular (MW). I-DS ichazwa njengenani eliqhelekileyo lamaqela e-carboxymethyl ngeyunithi ye-glucose kwi-cellulose backbone, ngelixa i-MW ibonisa ubungakanani kunye nokusasazwa kwee-polymer chains.
Enye yeempawu eziphambili ze-CMC kukunyibilika kwayo emanzini. I-CMC inyibilika lula emanzini, yenza isisombululo esiqinileyo esineempawu ze-pseudoplastic. Le ndlela yokuziphatha kwe-rheological ibangelwa kukunxibelelana phakathi kweemolekyuli ze-CMC, okubangela ukwehla kwe-viscosity phantsi koxinzelelo lwe-shear. Uhlobo lwe-pseudoplastic lwezisombululo ze-CMC luzenza zilungele ukusetyenziswa ngeendlela ezahlukeneyo ezifana nezithambisi, iziqinisi, kunye nee-agents zokumisa.
Olunye uphawu olubalulekileyo lwe-CMC kubuchule bayo bokwenza ifilimu. Izisombululo ze-CMC zinokufakwa kwiifilimu ezineempawu ezibalaseleyo zoomatshini, ukucaca, kunye nokuguquguquka. Ezi filimu zingasetyenziswa njengeengubo, ii-laminates kunye nezixhobo zokupakisha.
Ukongeza, i-CMC ineempawu ezilungileyo zokubopha kunye nokubopha. Yenza ukubopha okuqinileyo kwiindawo ezahlukeneyo, kubandakanya umthi, isinyithi, iplastiki kunye nelaphu. Le mpawu ikhokelele ekusetyenzisweni kwe-CMC kwimveliso yeengubo, izincamathelisi kunye nee-inki.
Ukuqina kwe-CMC
Ukuqina kwezisombululo zeCMC kuxhomekeke kwizinto ezininzi ezifana noxinzelelo, iDS, iMW, ubushushu, kunye ne-pH. Ngokubanzi, izisombululo zeCMC zibonisa ukuqina okuphezulu kuxinzelelo oluphezulu, iDS, kunye neMW. Ukuqina kuyanda ngokuncipha kobushushu kunye ne-pH.
Ubuninzi bezisombululo zeCMC bulawulwa kukusebenzisana phakathi kweetsheyini zepolymer kunye neemolekyuli zesolvent kwisisombululo. Iimolekyuli zeCMC zidibana neemolekyuli zamanzi ngokusebenzisa iibhondi zehydrogen, zenze igobolondo lomswakama elijikeleze iitsheyini zepolymer. Eli gobolondo lomswakama linciphisa ukuhamba kweetsheyini zepolymer, ngaloo ndlela landisa ubunzima besisombululo.
Ukuziphatha kwe-rheological kwezisombululo ze-CMC kubonakala ngama-flow curves, achaza ubudlelwane phakathi koxinzelelo lwe-shear kunye nesantya sokucheba kwesisombululo. Izisombululo ze-CMC zibonisa ukuziphatha kokuhamba okungengokwaseNewtonian, okuthetha ukuba i-viscosity yazo iyatshintsha ngesantya sokucheba. Ngamazinga aphantsi okucheba, i-viscosity yezisombululo ze-CMC iphezulu, ngelixa ngamazinga aphezulu okucheba, i-viscosity iyancipha. Olu hlobo lokuziphatha lokunciphisa i-shear lubangelwa zii-polymer chains ezihambelanayo nezisolulekileyo phantsi koxinzelelo lwe-shear, okubangela ukunciphisa amandla e-intermolecular phakathi kwee-chains kunye nokuncipha kwe-viscosity.
Ukusetyenziswa kwe-CMC
I-CMC isetyenziswa kakhulu kwiindawo ezahlukeneyo ngenxa yeempawu zayo ezizodwa kunye nokuziphatha kwayo kwe-rheological. Kwishishini lokutya, i-CMC isetyenziswa njengesithambisi, isiqinisi, i-emulsifier kunye nesiphuculi sokuthungwa. Yongezwa ekutyeni okufana ne-ayisikhrim, iziselo, iisosi kunye nezinto ezibhakiweyo ukuphucula ukuthungwa kwazo, ukuhambelana kwazo kunye nexesha elihlala ixesha elide. I-CMC ikwathintela ukwakheka kweekristale zomkhenkce ekutyeni okukhenkcezisiweyo, nto leyo ephumela kwimveliso ethambileyo nekhrimu.
Kwishishini lamayeza, i-CMC isetyenziswa njenge-binder, disintegrant kunye ne-release agent elawulwayo kwi-tablet formulations. Iphucula ukuxinana kunye nokugeleza komgubo kwaye iqinisekise ukufana kunye nokuzinza kwee-tablet. Ngenxa yeempawu zayo ze-mucoadhesive kunye ne-bioadhesive, i-CMC ikwasetyenziswa njenge-excipient kwi-ophthalmic, impumlo, kunye ne-mouth formulations.
Kwishishini lephepha, i-CMC isetyenziswa njengesixhobo sokongeza amanzi, i-coating binder kunye ne-agent yokushicilela ubungakanani. Iphucula ukugcinwa kwe-pulp kunye nokuphuma kwamanzi, yonyusa amandla kunye noxinano lwephepha, kwaye inika umphezulu ogudileyo nokhazimlayo. I-CMC ikwasebenza njengomqobo wamanzi kunye neoyile, ithintela i-inki okanye ezinye izinto ezimanzi ukuba zingangeni ephepheni.
Kwishishini lempahla elaphu, i-CMC isetyenziswa njenge-ejenti yokulinganisa ubungakanani, isithambisi sokuprinta, kunye ne-dyeing assistant. Iphucula ukunamathela kwefayibha, iphucula ukungena kombala kunye nokuqina, kwaye inciphisa ukungqubana kunye nemibimbi. I-CMC ikwanika ukuthamba kunye nokuqina kwilaphu, kuxhomekeke kwi-DS kunye ne-MW ye-polymer.
Kwishishini lezemigodi, i-CMC isetyenziswa njengesilungisi se-flocculant, inhibitor kunye ne-rheology ekucutshungulweni kwezimbiwa. Iphucula ukuhlaliswa kunye nokuhluzwa kwezinto eziqinileyo, inciphisa ukwahlukana ne-gangue yamalahle, kwaye ilawula ukuxinana kokumiswa kunye nozinzo. I-CMC ikwanciphisa impembelelo yenkqubo yezemigodi kwindalo ngokunciphisa ukusetyenziswa kweekhemikhali ezinobuthi kunye namanzi.
ukuququmbela
I-CMC sisithako esiguquguqukayo nesixabisekileyo esibonisa iimpawu ezikhethekileyo kunye nokuqina ngenxa yesakhiwo sayo seekhemikhali kunye nokusebenzisana namanzi. Ukunyibilika kwayo, amandla ayo okwenza ifilimu, iimpawu zokubopha kunye nokunamathela kuyenza ifaneleke ukusetyenziswa ezahlukeneyo kwicandelo lokutya, amayeza, iphepha, ilaphu kunye nemigodi. Ukuqina kwezisombululo ze-CMC kunokulawulwa zizinto ezahlukeneyo, ezinje ngoxinzelelo, i-DS, i-MW, ubushushu, kunye ne-pH, kwaye inokubonakaliswa yindlela yayo yokwenza izinto ze-pseudoplastic kunye nokunciphisa ukucheba. I-CMC inempembelelo entle kumgangatho, ukusebenza kakuhle kunye nokuzinza kweemveliso kunye neenkqubo, okwenza ukuba ibe yinxalenye ebalulekileyo kushishino lwanamhlanje.
Ixesha lokuthumela: Septemba-25-2023