Ukuxubana okungajulile, okudlala indima ebalulekile ekuthuthukiseni ukusebenza kokwakha udaka oluxubene nowomile, kubiza ngaphezu kuka-40% wezindleko zezinto zokwakha udaka oluxubene nowomile. Iningi lokuxubana emakethe yasekhaya linikezwa abakhiqizi bangaphandle, kanti isilinganiso semikhiqizo sinikezwa nabahlinzeki. Izindleko zomkhiqizo wodaka oluxubene nowomile zihlala ziphezulu ngaleyo ndlela, futhi kunzima ukwenza udaka oluvamile lokwakha noluplasta luthandwe ngenani elikhulu nobubanzi. Imikhiqizo yemakethe ephezulu ilawulwa yizinkampani zakwamanye amazwe, kanti abakhiqizi bodaka oluxubene nowomile banenzuzo ephansi kanye nokufinyeleleka kwentengo embi; ukusetshenziswa kokuxubana akunalo ucwaningo oluhlelekile noluqondiwe, futhi kulandela ngokungacabangi amafomula akwamanye amazwe. Nakhu, esikwabelana nani ukuthi, iyini indima ye-hydroxypropyl methylcellulose ekuxubeni okuvamile kodaka oluxubene nowomile?
I-Hydroxypropyl methylcellulose uhlobo lwe-cellulose olukhiqizwa futhi olusetshenziswa kakhulu eminyakeni yamuva nje. I-Hydroxypropyl methylcellulose yenziwe ngokotini ocolisisiwe ngemuva kokwelashwa kwe-alkalizing, kusetshenziswa i-propylene oxide kanye ne-methyl chloride njengezinto ezi-etherification, i-non-ionic cellulose mixed ether eyenziwe ngochungechunge lwezimpendulo. Izinga lokushintshana ngokuvamile lingu-1.2 ~ 2.0. Izakhiwo zayo zihlukile kuye ngesilinganiso sokuqukethwe kwe-methoxyl kanye nokuqukethwe kwe-hydroxypropyl. Izici ze-hydroxypropyl methylcellulose yilezi ezilandelayo:
1. I-hydroxypropyl methylcellulose incibilika kalula emanzini abandayo, futhi izobhekana nobunzima ekuncibilikeni emanzini ashisayo. Kodwa izinga lokushisa layo le-gelation emanzini ashisayo liphakeme kakhulu kunele-methyl cellulose. Ukuncibilika emanzini abandayo nakho kuthuthuke kakhulu uma kuqhathaniswa ne-methyl cellulose.
2. Ukuqina kwe-hydroxypropyl methylcellulose kuhlobene nesisindo sayo sama-molecule. Uma isisindo sama-molecule sikhulu, kulapho ukuqina kwe-viscosity kuphakama khona. Izinga lokushisa lithinta nokuqina kwayo, njengoba izinga lokushisa likhuphuka, ukuqina kwe-viscosity kwehla. Kodwa-ke, ithonya lokuqina kwayo okuphezulu kanye nokushisa liphansi kunele-methyl cellulose. Isixazululo sayo sizinzile uma sigcinwa ekushiseni kwegumbi.
3. Ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose kuncike enanini layo lokwengeza, i-viscosity, njll., futhi izinga layo lokugcinwa kwamanzi ngaphansi kwenani elifanayo lokwengeza liphakeme kunele-methyl cellulose.
4. I-Hydroxypropyl methylcellulose izinzile ku-asidi kanye ne-alkali, futhi isixazululo sayo samanzi sizinzile kakhulu ku-pH=2~12. I-Caustic soda kanye namanzi e-lime awanawo umthelela omkhulu ekusebenzeni kwayo, kodwa i-alkali ingasheshisa ukuncibilika kwayo futhi ikhuphule kancane i-viscosity yayo. I-Hydroxypropyl methylcellulose izinzile ku-viscosity evamile, kodwa lapho ukuhlushwa kwesisombululo sikasawoti kuphezulu, i-viscosity yesisombululo se-hydroxypropyl methylcellulose ivame ukwanda.
5. I-hydroxypropyl methylcellulose ingaxutshwa nama-polymer ancibilika emanzini ukuze kwakheke isixazululo esifanayo nesinobuthi obuphezulu. Njenge-polyvinyl alcohol, i-starch ether, i-vegetable gum, njll.
6. I-hydroxypropyl methylcellulose inokumelana okungcono kwama-enzyme kune-methylcellulose, futhi amathuba okuwohloka kwama-enzyme esisombululo sayo aphansi kune-methylcellulose.
7. Ukunamathela kwe-hydroxypropyl methylcellulose ekwakhiweni kwe-mortar kuphakeme kunokwe-methylcellulose.
Isikhathi sokuthunyelwe: Meyi-09-2023