I-Hydroxyethyl Methyl Cellulose (HEMC)iyinhlanganisela ye-cellulose ether ebalulekile futhi ingeye-non-ionic cellulose ether. I-HEMC itholakala ngokuguqulwa kwamakhemikhali nge-cellulose yemvelo njengempahla eluhlaza. Isakhiwo saso siqukethe izinto ezifakwa esikhundleni se-hydroxyethyl kanye ne-methyl, ngakho-ke inezici eziyingqayizivele zomzimba namakhemikhali futhi isetshenziswa kabanzi ezintweni zokwakha, okokugqoka, amakhemikhali ansuku zonke, imithi kanye neminye imikhakha.
1. Izakhiwo zomzimba namakhemikhali
I-HEMC ivamise ukuba yimpushana emhlophe noma emhlophe noma ama-granules, ancibilika kalula emanzini abandayo ukuze kwakheke isixazululo se-colloidal esobala noma esimathuthuva kancane. Izici zayo eziyinhloko zihlanganisa:
Ukunyibilika: I-HEMC ingancibilika ngokushesha emanzini abandayo, kodwa inokuncibilika okuncane emanzini ashisayo. Ukunyibilika kwayo kanye ne-viscosity kuyashintsha ngokushintsha kwezinga lokushisa kanye nenani le-pH.
Ukuqina komphumela: I-HEMC inekhono eliqinile lokuqina emanzini futhi ingakhuphula ngempumelelo i-viscosity yesixazululo.
Ukugcinwa kwamanzi: Kunokusebenza okuhle kakhulu kokugcinwa kwamanzi futhi kungavimbela ukulahleka kwamanzi ezintweni.
Isakhiwo sokwenza ifilimu: I-HEMC ingenza ifilimu esobala efanayo endaweni enokuqina namandla athile.
I-Lubricity: Ngenxa yesakhiwo sayo esiyingqayizivele samangqamuzana, i-HEMC inganikeza ukuthambisa okuhle kakhulu.
2. Inqubo yokukhiqiza
Inqubo yokukhiqiza ye-HEMC ikakhulukazi ihlanganisa lezi zinyathelo ezilandelayo:
I-Alkalization: I-cellulose yemvelo iphathwa ngaphansi kwezimo ze-alkaline ukwenza i-alkali cellulose.
Ukusabela kwe-Etherification: Ngokungeza ama-methylating agents (njenge-methyl chloride) nama-hydroxyethylating agents (njenge-ethylene oxide), i-cellulose ithola ukusabela kwe-etherification ekushiseni okukhethekile nokucindezela.
Ngemuva kokwelashwa: Umphumela womkhiqizo ongahluziwe uyasuswa, ugezwe, womiswe bese ugaywa ukuze ekugcineni uthole.I-HEMCimikhiqizo.
3. Izindawo zokufaka izicelo eziyinhloko
(1) Izinto zokwakha I-HEMC isetshenziswa kabanzi emkhakheni wokwakha, ikakhulukazi odakeni lukasimende, i-putty powder, i-adhesive tile, i-gypsum neminye imikhiqizo. Ingathuthukisa i-viscosity, ukugcinwa kwamanzi kanye nezakhiwo zokulwa nokuwohloka kwezinto zokwakha, yandise isikhathi esivulekile, futhi ngaleyo ndlela ithuthukise ukusebenza kokwakhiwa.
(2) Opende noyinki Kupende, i-HEMC isebenza njenge-thickener ne-emulsifier stabilizer ukuze kuthuthukiswe i-viscosity kanye ne-rheology kapende futhi ivimbele ukugoqa ekuncipheni. Ngaphezu kwalokho, inganikeza izakhiwo ezinhle zokwenza ifilimu, okwenza indawo yopende ibe yinto efanayo futhi ibushelelezi.
(3) Imithi kanye nezimonyo I-HEMC ingasetshenziswa njenge-adhesive kanye ne-ejenti yokwenza ifilimu kumaphilisi emithi, kanye ne-thickener kanye ne-moisturizer emikhiqizweni yokunakekelwa kwesikhumba. Ngenxa yokuphepha kwayo okuphezulu kanye ne-biocompatibility, ivame ukusetshenziswa emikhiqizweni efana namaconsi wamehlo, izinto zokuhlanza ubuso, kanye nezigcobo.
(4) Amakhemikhali ansuku zonke Kumakhemikhali ansuku zonke afana ne-detergents kanye ne-toothpastes, i-HEMC isetshenziswa njenge-thickener ne-stabilizer ukuze kuthuthukiswe i-rheology nokuzinza komkhiqizo.
4. Izinzuzo kanye nokuvikelwa kwemvelo
I-HEMC inokubola okuphezulu kwe-biodegradability kanye nezici zokuvikela imvelo futhi ngeke ibangele ukungcola kwesikhathi eside emvelweni. Ngesikhathi esifanayo, ayinabo ubuthi futhi ayinabungozi, ayicasuli isikhumba somuntu kanye nolwelwesi lwamafinyila, futhi ihlangabezana nezidingo zokuvikelwa kwemvelo okuluhlaza kanye nentuthuko eqhubekayo.
5. Amathemba emakethe kanye nezitayela zentuthuko
Ngokuthuthuka kwemboni yezokwakha kanye nemboni yamakhemikhali yansuku zonke, isidingo semakethe se-HEMC siyaqhubeka nokukhula. Esikhathini esizayo, njengoba abantu benaka kakhulu izinto ezithinta imvelo futhi bathuthukise ukusebenza komkhiqizo, i-HEMC izosetshenziswa kabanzi emikhakheni ehlukahlukene. Ngaphezu kwalokho, ucwaningo nokuthuthukiswa kwemikhiqizo emisha ye-HEMC esebenzayo (njengokumelana nokushisa okuphezulu kanye nohlobo olusheshayo) kuzophinde kukhuthaze ukusetshenziswa kwayo emakethe ephezulu.
Njenge-ether ye-cellulose esebenza ngezinto eziningi futhi esebenza kakhulu,i-hydroxyethyl methylcellulose (HEMC)idlala indima ebalulekile ekwakhiweni, ekwakhiweni kwezingubo, kwezokwelapha nakweminye imikhakha enezakhiwo zayo eziyingqayizivele zomzimba namakhemikhali. Ngokuthuthuka kwesayensi nobuchwepheshe kanye nokwandiswa kwezindawo zokufaka izicelo, i-HEMC izodlala indima ebaluleke kakhulu embonini yesimanje futhi inikeze ukwesekwa okuqinile kokuthuthukiswa kwezimboni ezihlobene.
Isikhathi sokuthumela: Nov-11-2024