I-Hydroxyethyl Methyl Cellulose (HEMC)iyinhlanganisela ebalulekile ye-cellulose ether futhi ingeye-non-ionic cellulose ether. I-HEMC itholakala ngokuguqulwa kwamakhemikhali nge-cellulose yemvelo njengezinto zokusetshenziswa. Isakhiwo sayo siqukethe i-hydroxyethyl kanye ne-methyl substituents, ngakho-ke inezakhiwo zomzimba nezamakhemikhali ezihlukile futhi isetshenziswa kabanzi ezintweni zokwakha, ezimbozweni, kumakhemikhali ansuku zonke, kwezokwelapha nakweminye imikhakha.
1. Izakhiwo zomzimba nezamakhemikhali
I-HEMC ivame ukuba yimpuphu noma ama-granule amhlophe noma amhlophe qwa, ancibilika kalula emanzini abandayo ukuze akhe isixazululo se-colloidal esibonakalayo noma esinamafu kancane. Izici zayo eziyinhloko zifaka:
Ukuncibilika: I-HEMC ingancibilika ngokushesha emanzini abandayo, kodwa ayinakuncibilika kahle emanzini ashisayo. Ukuncibilika kwayo kanye ne-viscosity kuyashintsha ngokushintsha kwezinga lokushisa kanye nenani le-pH.
Umphumela wokuqina: I-HEMC inekhono eliqinile lokujiya emanzini futhi ingakhuphula ngempumelelo ukujiya kwesisombululo.
Ukugcinwa kwamanzi: Isebenza kahle kakhulu ekugcinweni kwamanzi futhi ingavimbela ukulahleka kwamanzi ezintweni.
Isakhiwo sokwakha ifilimu: I-HEMC ingakha ifilimu ecacile efanayo ebusweni ngokuqina okuthile namandla athile.
Ukuthamba: Ngenxa yesakhiwo sayo esiyingqayizivele sama-molecule, i-HEMC inganikeza ukuthamba okuhle kakhulu.
2. Inqubo yokukhiqiza
Inqubo yokukhiqiza ye-HEMC ihlanganisa ikakhulukazi izinyathelo ezilandelayo:
I-Alkalization: I-cellulose yemvelo iphathwa ngaphansi kwezimo ze-alkaline ukuze yakhe i-alkaline cellulose.
Ukusabela kwe-etherification: Ngokufaka ama-methylating agents (njenge-methyl chloride) kanye nama-hydroxyethylating agents (njenge-ethylene oxide), i-cellulose idlula etherification reaction ekushiseni nasekucindezelweni okuthile.
Ngemva kokwelashwa: Umkhiqizo oluhlaza ophumayo uyasuswa, ugezwe, womiswe, bese uchotshozwa ukuze ekugcineni utholakaleI-HEMCimikhiqizo.
3. Izindawo eziyinhloko zokusetshenziswa
(1) Izinto zokwakha i-HEMC isetshenziswa kabanzi emkhakheni wokwakha, ikakhulukazi ku-cement mortar, i-putty powder, i-tile adhesive, i-gypsum neminye imikhiqizo. Ingathuthukisa i-viscosity, ukugcinwa kwamanzi kanye nezakhiwo zokulwa nokuwa kwezinto zokwakha, yandise isikhathi sokusebenza, ngaleyo ndlela ithuthukise ukusebenza kokwakha.
(2) Upende noyinki Kupende, i-HEMC isebenza njengesithambisi-ndlela sokuqinisa kanye ne-emulsifier ukuze kuthuthukiswe i-viscosity kanye ne-rheology yopende futhi kuvimbele ukugoba kopende. Ngaphezu kwalokho, inganikeza izakhiwo ezinhle zokwakha ifilimu, okwenza ubuso bopende bufane futhi bube bushelelezi.
(3) I-HEMC yezokwelapha nezimonyo ingasetshenziswa njenge-adhesive kanye ne-ejenti yokwenza ifilimu kumaphilisi emithi, kanye ne-thickener kanye ne-moisturizer emikhiqizweni yokunakekelwa kwesikhumba. Ngenxa yokuphepha kwayo okuphezulu kanye nokuhambisana kwayo nezinto eziphilayo, ivame ukusetshenziswa emikhiqizweni efana namaconsi amehlo, izihlanzi zobuso, kanye nama-lotion.
(4) Amakhemikhali ansuku zonke Kumakhemikhali ansuku zonke njengezinto zokuhlanza kanye namazinyo okuxubha, i-HEMC isetshenziswa njengesithambisi kanye nesiqinisi sokuthuthukisa i-rheology kanye nokuzinza komkhiqizo.
4. Izinzuzo kanye nokuvikelwa kwemvelo
I-HEMC inezici zokuvikela imvelo eziphakeme futhi ngeke ibangele ukungcola kwesikhathi eside emvelweni. Ngesikhathi esifanayo, ayinabo ubuthi futhi ayinangozi, ayicasuli isikhumba somuntu kanye nolwelwesi lwamafinyila, futhi ihlangabezana nezidingo zokuvikelwa kwemvelo okuluhlaza kanye nentuthuko eqhubekayo.
5. Amathemba emakethe kanye nemikhuba yentuthuko
Ngokuthuthuka kwemboni yokwakha kanye nemboni yamakhemikhali yansuku zonke, isidingo semakethe se-HEMC siyaqhubeka nokukhula. Esikhathini esizayo, njengoba abantu benaka kakhulu izinto ezinobungani nemvelo futhi bethuthukisa ukusebenza komkhiqizo, i-HEMC izosetshenziswa kabanzi emikhakheni eyahlukahlukene. Ngaphezu kwalokho, ucwaningo kanye nokuthuthukiswa kwemikhiqizo emisha ye-HEMC esebenzayo (njengokumelana nokushisa okuphezulu kanye nohlobo olusheshayo) kuzophinde kukhuthaze ukusetshenziswa kwayo emakethe ephezulu.
Njenge-ether ye-cellulose esebenza kahle futhi esebenza kahle kakhulu,i-hydroxyethyl methylcellulose (HEMC)Idlala indima ebalulekile ekwakheni, ekumbozeni, kwezokwelapha nakwezinye izinkambu ngezakhiwo zayo eziyingqayizivele zomzimba nezamakhemikhali. Ngokuthuthuka kwesayensi nobuchwepheshe kanye nokwandiswa kwezinkambu zokusetshenziswa, i-HEMC izodlala indima ebaluleke kakhulu embonini yanamuhla futhi inikeze ukwesekwa okuqinile ekuthuthukisweni kwezimboni ezihlobene.
Isikhathi sokuthunyelwe: Novemba-11-2024