I-Carboxymethyl cellulose (CMC) kanye ne-hydroxyethyl cellulose (HEC) yizinto ezimbili eziphuma ku-cellulose ezivamile, ezisetshenziswa kakhulu ekudleni, emithini, kwezimonyo, ezintweni zokwakha nakweminye imikhakha. Nakuba zombili zitholakala ku-cellulose yemvelo futhi zitholakala ngokuguqulwa kwamakhemikhali, kunomehluko osobala wesakhiwo samakhemikhali, izakhiwo ze-physicochemical, izinkambu zokufaka isicelo kanye nemiphumela yokusebenza.
1. Isakhiwo samakhemikhali
Isici esiyinhloko sesakhiwo se-carboxymethyl cellulose (CMC) ukuthi amaqembu e-hydroxyl kuma-molecule e-cellulose athathelwa indawo amaqembu e-carboxymethyl (-CH2COOH). Lokhu kuguqulwa kwamakhemikhali kwenza i-CMC incibilike kakhulu emanzini, ikakhulukazi emanzini ukuze yakhe isixazululo se-viscous colloidal. I-viscosity yesisombululo sayo isondelene kakhulu nezinga layo lokushintshwa (okungukuthi izinga lokushintshwa kwe-carboxymethyl).
I-Hydroxyethyl cellulose (HEC) yakhiwa ngokufaka i-hydroxyethyl (-CH2CH2OH) esikhundleni samaqembu e-hydroxyl ku-cellulose. Iqembu le-hydroxyethyl ku-molecule ye-HEC likhulisa ukuncibilika kwamanzi kanye ne-hydrophilicity ye-cellulose, futhi lingakha ijeli ngaphansi kwezimo ezithile. Lesi sakhiwo senza i-HEC ibonise imiphumela emihle yokuqina, ukumiswa kanye nokuqiniswa kwisisombululo esinamanzi.
2. Izakhiwo zomzimba namakhemikhali
Ukuncibilika kwamanzi:
I-CMC ingancibilika ngokuphelele emanzini abandayo nashisayo ukuze yakhe isixazululo se-colloidal esobala noma eguquguqukayo. Isixazululo saso sine-viscosity ephezulu, futhi i-viscosity iyashintsha ngokushisa kanye nenani le-pH. I-HEC ingaphinde incibilike emanzini abandayo nashisayo, kodwa uma iqhathaniswa ne-CMC, izinga layo lokuhlakazeka lihamba kancane futhi kuthatha isikhathi eside ukwenza isisombululo esifanayo. I-viscosity yesixazululo ye-HEC iphansi kakhulu, kodwa inokumelana nosawoti okungcono kanye nokuzinza.
Ukulungiswa kwe-viscosity:
I-viscosity ye-CMC ithintwa kalula inani le-pH. Ivamise ukuba phezulu ngaphansi kwezimo ezingathathi hlangothi noma ezine-alkali, kodwa i-viscosity izoncishiswa kakhulu ngaphansi kwezimo eziqinile ze-asidi. I-viscosity ye-HEC ithintwa kancane inani le-pH, inohlu olubanzi lokuzinza kwe-pH, futhi ilungele ukusetshenziswa ngaphansi kwezimo ezihlukahlukene ze-asidi ne-alkaline.
Ukumelana nosawoti:
I-CMC izwela kakhulu usawoti, futhi ukuba khona kukasawoti kuzonciphisa kakhulu i-viscosity yesisombululo sayo. Ngakolunye uhlangothi, i-HEC ikhombisa ukumelana nosawoti okuqinile futhi isengakwazi ukugcina umphumela omuhle wokujiya endaweni enosawoti omningi. Ngakho-ke, i-HEC inezinzuzo ezisobala ezinhlelweni ezidinga ukusetshenziswa kosawoti.
3. Izindawo zokufaka izicelo
Imboni yokudla:
I-CMC isetshenziswa kabanzi embonini yokudla njenge-thickener, stabilizer kanye ne-emulsifier. Isibonelo, emikhiqizweni efana no-ayisikhilimu, iziphuzo, ujamu, namasoso, i-CMC ingathuthukisa ukunambitheka nokuzinza komkhiqizo. I-HEC ayivamisile ukusetshenziswa embonini yokudla futhi isetshenziswa kakhulu kweminye imikhiqizo enezidingo ezikhethekile, njengokudla okunamakhalori aphansi kanye nezithako zokudla okukhethekile.
Imithi nezimonyo:
I-CMC ivamise ukusetshenziselwa ukulungisa amaphilisi ezidakamizwa akhishwa njalo, uketshezi lwamehlo, njll., ngenxa yokuhambisana kwayo okuhle nokuphepha. I-HEC isetshenziswa kabanzi kuzimonyo ezifana nokuthambisa, okhilimu nama-shampoos ngenxa yezakhiwo zayo ezinhle kakhulu zokwenza ifilimu kanye nezindawo zokuthambisa, ezinganikeza umuzwa omuhle kanye nomphumela womswakama.
Izinto zokwakha:
Ezimpahleni zokwakha, kokubili i-CMC ne-HEC ingasetshenziswa njengama-thieners nama-retainers, ikakhulukazi kusimende kanye nezinto ezisekelwe ku-gypsum. I-HEC isetshenziswa kabanzi ezintweni zokwakha ngenxa yokumelana nosawoti omuhle nokuzinza, okungathuthukisa ukusebenza kokwakhiwa nokuqina kwezinto.
Ukukhishwa kwamafutha:
Ekukhishweni kukawoyela, i-CMC, njengesengezo soketshezi lokumba, ingalawula ngempumelelo i-viscosity nokulahlekelwa kwamanzi odaka. I-HEC, ngenxa yokumelana nosawoti okuphakeme kanye nezakhiwo eziqina, isibe yingxenye ebalulekile kumakhemikhali e-oilfield, asetshenziselwa uketshezi lokumba kanye noketshezi oluqhekekayo ukuze kuthuthukiswe ukusebenza kahle kanye nezinzuzo zezomnotho.
4. Ukuvikelwa kwemvelo kanye nokubola kwemvelo
Kokubili i-CMC ne-HEC zithathwe ku-cellulose yemvelo futhi zinokubola okuhle kwe-biodegradability kanye nobungane bemvelo. Endaweni engokwemvelo, zingacekelwa phansi amagciwane ukuze zikhiqize izinto ezingenangozi njengesikhutha namanzi, okunciphisa ukungcoliswa kwemvelo. Ngaphezu kwalokho, ngenxa yokuthi ayinabo ubuthi futhi ayinabungozi, isetshenziswa kabanzi emikhiqizweni ehlangana ngqo nomzimba womuntu, njengokudla, imithi kanye nezimonyo.
Nakuba i-carboxymethyl cellulose (CMC) kanye ne-hydroxyethyl cellulose (HEC) zombili ziphuma ku-cellulose, zinomehluko omkhulu ekwakhekeni kwamakhemikhali, izakhiwo ze-physicochemical, izinkambu zohlelo lokusebenza kanye nemiphumela yokusebenza. I-CMC isetshenziswa kabanzi ekudleni, emithini, ekukhishweni kukawoyela nakweminye imikhakha ngenxa ye-viscosity yayo ephezulu kanye nokuba sengozini kwamathonya emvelo. I-HEC, noma kunjalo, isetshenziswa kakhulu ezimonyoni, ezintweni zokwakha, njll. ngenxa yokumelana nosawoti omuhle kakhulu, ukuzinza kanye nezakhiwo zefilimu. Lapho ukhetha ukuyisebenzisa, kuyadingeka ukuthi ukhethe okuphuma ku-cellulose ofaneleka kakhulu ngokwesimo esithile sohlelo lokusebenza futhi udinga ukuzuza umphumela wokusebenzisa ongcono kakhulu.
Isikhathi sokuthumela: Aug-21-2024