I-Methylhydroxyethylcellulose (MHEC) idlala indima ebalulekile ekuthuthukiseni ukungaguquguquki kwe-putty, impahla esetshenziswa kabanzi ezimbonini ezihlukahlukene ezihlanganisa ezokwakha, ezezimoto nezokukhiqiza. Lesi sihloko sinikeza ukuhlaziywa okujulile kwezakhiwo ze-MHEC kanye nomthelela wayo obalulekile ekuthuthukiseni ukuhambisana kwe-putty. Ihlola ukwakheka kwamakhemikhali, izakhiwo zomzimba, kanye nezindlela zokusebenza ze-MHEC ekwakhekeni kwe-putty.
I-Putty iyimpahla eguquguqukayo esetshenziswa kabanzi ekwakheni, ukulungisa izimoto, ukukhiqiza nezinye izimboni ezahlukahlukene. Ukungaguquguquki kwayo kuyisici esibalulekile ekunqumeni ukusebenziseka nokusebenza kwayo ezinhlelweni ezahlukene. Ukufeza ukuvumelana okufunayo kwe-putty kudinga ukubhekana nezinselelo ezihlukahlukene ezifana nokulawula i-viscosity, ukusebenza kahle kanye nezakhiwo zokunamathela. I-Methylhydroxyethylcellulose (MHEC) ivela njengesengezo esibalulekile esikhulisa kakhulu ukuvumelana kwe-putty ngenkathi kuthuthukisa izici zayo zokusebenza.
1. Ukwakheka kwamakhemikhali kanye nezakhiwo ezibonakalayo ze-MHEC
I-MHEC i-nonionic cellulose ether etholwe ngokuguqulwa kwamakhemikhali kwe-cellulose. Ihlanganiswa ngokuphendula i-cellulose nge-ethylene oxide ne-methyl chloride ukuze yethule amaqembu e-hydroxyethyl kanye ne-methyl ochungechungeni oluyinhloko lwe-cellulose. I-degree of substitution (DS) yamaqembu e-hydroxyethyl kanye ne-methyl ithinta kakhulu izakhiwo ze-MHEC, okuhlanganisa ukuncibilika, i-viscosity, nokuziphatha kwe-rheological.
Isakhiwo samangqamuzana e-MHEC siyinikeza izakhiwo eziyingqayizivele, okwenza kube kuhle ezinhlobonhlobo zezinhlelo zokusebenza, kufaka phakathi ukwakheka kwe-putty. I-MHEC inokuncibilika kwamanzi okuhle kakhulu futhi yenza isisombululo esisobala nesizinzile lapho sihlakazeka emanzini. Lesi sici sokuncibilika sisiza ngisho nokusatshalaliswa ngaphakathi kwe-putty matrix, iqinisekisa ukusebenza okungaguquguquki kusuka kunqwaba kuya kunqwaba.
I-MHEC idlulisela ukuziphatha kwe-rheological ye-pseudoplastic ekwakhiweni kwe-putty, okusho ukuthi i-viscosity yayo yehla ngenani elikhulayo le-shear. Le mpahla ye-rheological ithuthukisa ukusebenza kwe-putty, ukusetshenziswa kalula nokubunjwa, kuyilapho igcina ukumelana ne-sag okwanele kanye nokuziphatha kwe-thixotropic.
I-MHEC inezici ezinhle kakhulu zokwenza ifilimu, isiza ukuthuthukisa amandla okubumbana nokunamathela kwe-putty endaweni engaphansi. Ikhono layo lokwenza ifilimu lidala umgoqo wokuvikela, othuthukisa ukuqina nokumelana nesimo sezulu, okwenza i-putty ifanele izicelo zangaphandle.
2. Indlela yokusebenza ye-MHEC ekwenziweni kwe-putty
Indima ye-MHEC ekuthuthukiseni ukungaguquguquki kwe-putty inezici eziningi futhi ihilela izindlela eziningi zokwenza izinto ezithonya izici zayo ze-rheological kanye nokusebenza.
Enye indlela eyinhloko i-hydration nokuvuvukala kwama-molecule e-MHEC ekwakhekeni kwe-putty okusekelwe emanzini. Lapho ihlakazeka emanzini, amaketanga e-MHEC afaka amanzi, okuholela ekwakhekeni kwenethiwekhi ye-polymer e-hydrated ngaphakathi kwe-putty matrix. Lesi sakhiwo senethiwekhi sinikeza i-putty viscosity nokuziphatha kwe-pseudoplastic, okusivumela ukuthi sigeleze kalula ngaphansi kwengcindezi ye-shear ngenkathi sigcina isimo saso esimile nokuhlangana.
I-MHEC isebenza njenge-thickener ngokukhulisa i-viscosity yesigaba samanzi kufomula ye-putty. Imvelo ye-hydrophilic ye-MHEC ikhuthaza ukugcinwa kwamanzi, ukuvimbela ukuhwamuka ngokweqile nokomisa kwe-putty ngesikhathi sokufaka isicelo. Leli khono lokubamba amanzi lelula isikhathi esivulekile se-putty, likuvumela ukuthi libe nesikhathi esanele sokusebenza ngaphambi kokusetha, ukwandisa ukuguquguquka kwesicelo nokunciphisa ukuchithwa kwezinto ezibonakalayo.
I-MHEC isebenza njengesibopho kanye nesiqinisi ekwakhekeni kwe-putty. Ngokwenza izibopho ze-hydrogen nezinye izakhi ezinjengama-filler, ama-pigment nama-polymers. Lokhu kusebenzisana kukhuthaza ukufana nokuhlakazeka okufanayo kwezithasiselo ngaphakathi kwe-putty matrix, ngaleyo ndlela kuthuthukisa izakhiwo zemishini, ukungaguquguquki kombala kanye nokusebenza kukonke.
I-MHEC inikela ekuziphatheni kwe-thixotropic kwe-putty, okusho ukuthi ibonisa i-viscosity ephakeme lapho uphumule kanye ne-viscosity ephansi ngaphansi kwengcindezi ye-shear. Lesi sici sisiza ukusetshenziswa okulula nokusabalala kwe-putty ngenkathi kuvimbela ukuwohloka noma ukuwa ezindaweni eziqondile. Imvelo ye-thixotropic ye-putty formulations equkethe i-MHEC iqinisekisa ukumbozwa okuphelele nokufana kwezendlalelo ezisetshenzisiwe, ngaleyo ndlela kuthuthukisa ubuhle nokuqedwa kwendawo.
3. Izinto ezithinta ukungaguquguquki kwe-putty kanye nendima ye-MHEC
Kunezici eziningi ezithinta ukuvumelana kwamafomula we-putty, okuhlanganisa uhlobo nekhwalithi yezinto zokusetshenziswa, imingcele yefomula, izimo zokucubungula kanye nezici zemvelo. I-MHEC idlala indima ebalulekile ekubhekaneni nalezi zici futhi ithuthukise ukungaguquguquki kwe-putty ukuze kuhlangatshezwane nezidingo ezithile zokusebenza.
Isici esibalulekile usayizi wezinhlayiyana nokusatshalaliswa kwama-filler nama-pigments ekwakhiweni kwe-putty. Izinhlayiya ezinhle zivame ukwandisa i-viscosity ne-thixotropy, kuyilapho izinhlayiya eziqinile zinganciphisa ukugeleza nokufana. I-MHEC isiza ukunciphisa lezi zinkinga ngokukhuthaza ukuhlakazeka okufanayo nokumiswa kwezinhlayiya ngaphakathi kwe-putty matrix, iqinisekisa i-viscosity engaguquki nokuziphatha kwe-rheological.
Izilinganiso kanye nokuhambisana kwezingxenye ezihlukene kufomula ye-putty nakho kuthinta ukuvumelana nokusebenza kwe-putty. I-MHEC isebenza njenge-compatibilizer kanye ne-rheology modifier, ikhuthaza ukuhlanganiswa kwezithasiselo ezihlukahlukene njengama-resin, ama-plasticizers nama-rheology modifiers. Izakhiwo zayo eziguquguqukayo zivumela abaklami ukuthi bazivumelanise futhi balungise kahle izici ze-rheological ze-putty ezidingweni ezithile zohlelo lokusebenza.
Amapharamitha okucubungula afana nesivinini sokuxuba, izinga lokushisa, nezinga le-shear kungathinta ukuhlakazeka nokusebenzisana kwe-MHEC ekwakhekeni kwe-putty. Ukuthuthukisa le mingcele kuqinisekisa ukugeleza kwamanzi okufanele nokusebenza kwama-molecule e-MHEC, okwandisa imiphumela yawo yokuqina, yokuzinzisa, kanye nokubopha.
Ngaphezu kwalokho, izimo zemvelo ezinjengomswakama, izinga lokushisa kanye nezakhiwo ezingaphezulu kwe-substrate nazo zingathinta ukusetshenziswa nokuziphatha kokwelapha kwe-putty. I-MHEC ithuthukisa ukugcinwa kwamanzi kanye nezakhiwo zokunamathela ze-putty, iyenze ifaneleke izimo ezihlukahlukene zemvelo nezinto ezingaphansi.
4. Izindlela zokufaka isicelo kanye nokucatshangelwa komthamo
Ukusetshenziswa okuphumelelayo kwe-MHEC ekwenziweni kwe-putty kudinga ukucatshangelwa ngokucophelela kwamasu okusebenza namazinga omthamo ukuze kuzuzwe ukuvumelana okufiselekayo nezici zokusebenza. Izinqubo ezifanele zokuxuba, ukufaka isicelo kanye nokuphulukisa zibalulekile ukuze kuqinisekiswe ukusatshalaliswa okufanayo nokusebenza kwe-MHEC ngaphakathi kwe-putty matrix.
Ngesikhathi sokuthuthukiswa kokubunjwa, kubalulekile ukunquma inani eliphelele le-MHEC ngokusekelwe ezidingweni ezithile zokusebenza ezifana ne-viscosity, ukumelana ne-sag, nesikhathi sokumisa. Inani le-MHEC elisetshenzisiwe lingahluka kuye ngezinto ezifana nohlobo lwe-putty, indlela yokufaka isicelo, izimo ze-substrate kanye nezici zemvelo.
Ngokuya ngemvelo ye-substrate, ukuqedwa kwendawo oyifunayo kanye nezidingo zephrojekthi, izinhlobonhlobo zamasu okwakha angasetshenziswa, okuhlanganisa ukudonsa ngesandla, ukufutha nokukhipha. Amafomu e-Putty aqukethe i-MHEC abonisa ukuhambisana okuhle kakhulu nezindlela ezihlukene zohlelo lokusebenza, okuvumela ukuguquguquka nokuguquguquka ekusetshenzisweni.
Isikhathi sokuthumela: Feb-28-2024