I-Hydroxypropyl Methylcellulose (HPMC) yi-semi-zokwenziwa, inert, i-polymer engenazo okunobuthi esetshenziswa kakhulu ezimbonini ezinjengomuthi, ukudla, izimonyo kanye nezinto zokwakha. Ubudlelwano phakathi kwesisindo salo se-molecular kanye ne-viscosity bunomthelela omkhulu ekusebenzeni kwalo ezinhlelweni ezahlukahlukene.
1. I-Solubity kanye nezakhiwo ezenziwe ngefilimu
I-viscosity ye-HPMC ithinta ngqo i-solubenity yayo emanzini. I-HPMC ene-viscosity ephansi ingancibilika emanzini ngokushesha futhi yakha isixazululo esisobala nesilinganiswayo, esilungele izinhlelo zokusebenza ezidinga ukuhlakazeka okusheshayo, okufana neziphuzo ezisheshayo noma amakhambi asheshayo. I-HPMC ene-viscosity ephezulu idinga isikhathi eside sokuchithwa, kepha inganikeza ngobukhulu obungcono namandla lapho kwakha ifilimu, ngakho-ke ilungele ukuhlanganiswa kwethebhulethi, ifilimu evikelayo kanye ne-matrix
2. Ukuqina kanye nokunamathelisa
I-HPMC ene-viscosity ephezulu ivame ukuba nokuqina okuqinile nokunamathelisa. Isibonelo, uma isetshenziswa njengesikhudlwana semikhiqizo yokwenza usimende noma i-gypsum ezintweni zokwakha, ububonazi be-HPMC ephezulu bangathuthukisa kakhulu ukugcinwa kwayo kwamanzi kanye nokumelana kwayo kwamanzi, basize ukwelula isikhathi sokwakha futhi banciphise ukuqhekeka. Embonini yezemithi, i-high-vispositive HPMC isetshenziselwa ukulawula isilinganiso sokukhishwa kwezidakamizwa. Ukunamathelisa kwalo okuphezulu kuvumela umuthi ukuthi ukhishwe kancane emzimbeni futhi uthuthukise ukungatholakali kwesidakamizwa.
3. Ukumiswa no-Emulsation
Izinguquko eziku-Viscosity ziphinde zithinte izici zokumiswa kanye nokukhulisa kwezakhiwo ze-HPMC. Ngenxa yamaketanga amafushane afushane ama-molecular, i-HPMC ephansi ilungele ukusetshenziswa njenge-ejenti esombile. Kungamisa ngempumelelo izingxenye ezingabonakali ezidakamizweni eziwuketshezi futhi uvikele ukuhanjiswa kwezulu. I-HPMC ene-viscosity ephezulu ingakha isakhiwo senethiwekhi esinamandla kwikhambi ngenxa ye-chain yalo ende, ngakho-ke yenza kangcono ekuqineni kwama-emulsion kanye nokumiswa futhi kungagcina ukufana isikhathi eside.
4. I-Rheology kanye nezakhiwo zohlelo lokusebenza
Izakhiwo ezi-Rheological ze-HPMC nazo ziyisici esibalulekile esithintwe ukubonwa. Izixazululo ze-HPMC eziphansi ze-HPMC zibonisa u-fluidity ongcono, kulula ukufafaza futhi zisebenzise, futhi zivame ukusetshenziswa emikhiqizweni yokunakekelwa kwesikhumba kanye nopende. Isixazululo esiphakeme se-HPMC siziphatha njengoketshezi olungelona neNewTonian futhi sinezici ezinciphile. Lesi sici senza i-HPMC ephakeme i-HPMC ibe lula ukuphatha ngaphansi kwezimo ezisezingeni eliphakeme, ngenkathi igcina ukubonakala okuphezulu ngaphansi kwezimo ze-static, ngaleyo ndlela kuthuthukise ukwakheka kwefilimu nokuqina komkhiqizo.
5. Izibonelo zohlelo lokusebenza
Insimu yezemithi: I-Vissusical HPMC ephansi (efana ne-50 CPS) ivame ukusetshenziselwa ukuhlanganisa amaphilisi okukhishwa ngokushesha ukuze kuqinisekiswe ukukhishwa okusheshayo kwezidakamizwa, ngenkathi i-HPMC ephezulu (njenge-4000 CPS) isetshenziselwa Izinga lokukhishwa kwezidakamizwa.
Inkambu yokudla: Ngokuthenga okusheshayo, i-HPMC ephansi ye-HPMC ingancibilikisa ngokushesha ngaphandle kokuqunjelwa; Emikhiqizweni ebhakiwe, i-HPMC ephezulu ye-HPMC ingathuthukisa amandla okubamba amanzi ngenhlama futhi ithuthukise ukunambitheka kanye nezindawo ezinomswakama zemikhiqizo ebhakiwe.
Inkambu Yokwakha: Ku-Cututies kanye ne-Coatings, i-vissusing ephansi i-HPMC isiza ukwakhiwa futhi ithuthukise ukusebenza kahle komsebenzi; Ngenkathi i-high-vissusity hpmc ithuthukisa ubukhulu nokumelana kwe-sag kokuhlanganiswa.
I-viscosity ye-HPMC iyipharamitha ebalulekile enquma ukusebenza kwayo kuzinhlelo zokusebenza. I-Viscosity ephansi i-HPMC esetshenziswa ngokujwayelekile lapho ukuhlukaniswa okusheshayo nokugeleza kudingeka, ngenkathi i-vistuality ephezulu i-HPMC inenzuzo kakhulu kwizicelo ezidinga ukunamathela okuphezulu, ukwakheka okuhle kwefilimu nokuqina. Ngakho-ke, ukukhetha i-HPMC nge-viscosity efanele kubalulekile ukuze wenze kahle ukusebenza kwayo emikhakheni ehlukahlukene.
Isikhathi sePosi: Jul-08-2024