1. Isingeniso se-Hydroxypropyl Methylcellulose (HPMC)
IHydroxypropyl Methylcellulose (HPMC)iyi-ether engeyona ionic cellulose eyenziwe ngefayibha kakotini yemvelo noma i-pulp yokhuni ngokuguqulwa kwamakhemikhali. I-HPMC inokuncibilika okuhle kwamanzi, ukuqina, ukuzinza, izakhiwo zefilimu kanye nokuvumelana kwezinto eziphilayo, ngakho-ke isetshenziswa kabanzi ekwakhiweni, imithi, ukudla, amakhemikhali nsuku zonke kanye neminye imikhakha.
2. Izinyathelo zokukhiqiza ze-HPMC
Ukukhiqizwa kwe-HPMC kufaka phakathi izinyathelo ezibalulekile ezilandelayo:
Ukulungiselela impahla eluhlaza
Impahla eyinhloko ye-HPMC i-cellulose yemvelo ehlanzekile kakhulu (imvamisa ivela kukotini noma i-pulp yokhuni), edinga ukwelashwa kokuqala ukuze kukhishwe ukungcola nokuqinisekisa ukuhlanzeka nokufana kwe-cellulose.
Ukwelashwa kwe-alkalination
Faka i-cellulose kureactor bese wengeza inani elifanele lesixazululo se-sodium hydroxide (NaOH) ukuze kuvuvukale i-cellulose endaweni ene-alkali ukwenza i-alkali cellulose. Le nqubo ingakhuphula umsebenzi we-cellulose futhi ilungiselele ukusabela kwe-etherification okulandelayo.
Ukusabela kwe-Etherification
Ngokusekelwe ku-alkali cellulose, ama-methylating agents (afana ne-methyl chloride) kanye nama-hydroxypropylating agents (afana ne-propylene oxide) ethulwa ukuze enze ukusabela kwe-etherification. Ukusabela kuvame ukwenziwa endaweni evaliwe yokucindezela okukhulu. Ezingeni elithile lokushisa nokucindezela, amaqembu e-hydroxyl ku-cellulose athathelwa indawo ngamaqembu e-methyl kanye ne-hydroxypropyl ukuze akhe i-hydroxypropyl methylcellulose.
Ukugeza kokungathathi hlangothi
Ngemuva kokusabela, umkhiqizo ungase ube nama-reagents amakhemikhali angaphenduliwe kanye nemikhiqizo, ngakho-ke kuyadingeka ukwengeza isisombululo se-asidi sokwelashwa kwe-neutralization, bese ugeza ngamanzi amaningi noma i-solvent ephilayo ukuze ususe izinto ezisele ze-alkaline nokungcola.
Ukuphelelwa amanzi emzimbeni nokomisa
Isixazululo se-HPMC esigeziwe sifakwe i-centrifuged noma sihlungiwe ukuze sisuse amanzi amaningi, bese ubuchwepheshe bokumisa izinga lokushisa eliphansi busetshenziselwa ukwakha impushana eyomile noma ama-flakes ukuze kugcinwe izakhiwo ezingokwenyama namakhemikhali ze-HPMC.
Ukugaya nokuhlola
I-HPMC eyomile ithunyelwa emishinini yokugaya ukuze igaywe ukuze kutholwe i-HPMC powder yamasayizi ahlukene ezinhlayiyana. Kamuva, ukuhlungwa nokuhlelwa kwenziwa ukuze kuqinisekiswe ukufana komkhiqizo ukuze uhlangabezane nezidingo ezahlukene zohlelo.
Ukupakisha nokugcina
Ngemuva kokuhlolwa kwekhwalithi, umkhiqizo wokugcina upakishwa ngokuvumelana nokusetshenziswa okuhlukene (okufana no-25kg/isikhwama) futhi ugcinwe endaweni eyomile futhi engenawo umoya ukuvimbela umswakama noma ukungcola.
3. Izindawo ezisetshenziswa kakhulu ze-HPMC
Ngenxa yokuqina kwayo okuhle, ukwakheka kwefilimu, ukugcina amanzi, ukuhlanganisa kanye nezakhiwo ezihambisana ne-biocompatibility, i-HPMC isetshenziswe kabanzi ezimbonini eziningi:
Imboni yezokwakha
I-HPMC iyisengezo esibalulekile sezinto zokwakha, ikakhulukazi ezisetshenziselwa:
Udaka lukasimende: thuthukisa uketshezi lokwakha, uthuthukise ukunamathela, futhi uvimbele ukulahleka kwamanzi ngokweqile.
I-adhesive yethayela: khulisa ukugcinwa kwamanzi kwe-adhesive tile futhi uthuthukise ukusebenza kokwakhiwa.
Imikhiqizo yeGypsum: thuthukisa ukumelana nokuqhekeka nokusebenza kokwakhiwa.
I-Putty powder: thuthukisa ukunamathela, ukumelana nokuqhekeka kanye nekhono lokulwa nokuhlehla.
Iphansi lokuzilinganisa: thuthukisa uketshezi, ukumelana nokugqoka nokuzinza.
Imboni yezemithi
I-HPMC isetshenziswa kabanzi emkhakheni wezokwelapha njenge:
I-coating kanye ne-ejenti yokwenza ifilimu yamaphilisi ezidakamizwa: thuthukisa ukuzinza kwezidakamizwa futhi ulawule izinga lokukhululwa kwezidakamizwa.
Amalungiselelo okukhishwa okuzinzile kanye nokukhishwa okulawulwayo: asetshenziswa kumathebulethi akhishwa njalo kanye namagobolondo e-capsule akhishwa okulawulwayo ukuze alawule ukukhululwa kwezidakamizwa.
Ama-capsule substitutes: asetshenziswa ekwenzeni amaphilisi emifino (amaphilisi emifino).
4. Imboni yokudla
I-HPMC isetshenziswa njengesengezo sokudla ikakhulukazi:
I-Thickener ne-emulsifier: isetshenziswa ezimpahleni ezibhakiwe, ojeli, amasoso, njll. ukuthuthukisa ukunambitheka kokudla.
I-Stabilizer: isetshenziswa ku-ayisikhilimu kanye nemikhiqizo yobisi ukuvimbela ukuna kwamaprotheni.
Ukudla kwemifino: kusetshenziswa njengesigqinsi sokudla okusekelwe ezitshalweni ukuze kuthathelwe indawo iziqinisi ezivela ezilwaneni njenge-gelatin.
Imboni yamakhemikhali yansuku zonke
I-HPMC iyisithako esibalulekile kuzimonyo nemikhiqizo yokunakekelwa komuntu siqu:
Imikhiqizo yokunakekelwa kwesikhumba: esetshenziswa ku-lotions, imaski yobuso, njll. ukunikeza umswakama nokuzinza.
I-Shampoo nejeli yokugeza: khulisa ukuqina kwegwebu futhi uthuthukise i-viscosity.
Inhlanzi yamazinyo: isetshenziswa njenge-thickener kanye ne-moisturizer ukuthuthukisa ukunambitheka.
Opende noyinki
I-HPMC inezinto ezinhle zokwenza ifilimu nokuzinza kokumiswa futhi ingasetshenziselwa:
Upende weLatex: thuthukisa ukuxubha kanye ne-rheology kapende futhi uvimbele imvula.
Uyinki: Thuthukisa i-rheology futhi uthuthukise ikhwalithi yokuphrinta.
Ezinye izinhlelo zokusebenza
I-HPMC ingasetshenziselwa:
Imboni ye-Ceramic: Njenge-binder, thuthukisa amandla ezikhala ze-ceramic.
Ezolimo: Isetshenziswa ekumisweni kwezibulala-zinambuzane kanye nasezimbotsheni zembewu ukuze kuthuthukiswe ukuzinza kwe-ejenti.
Imboni yokwenza amaphepha: Njenge-ejenti yokulinganisa, thuthukisa ukumelana namanzi nokuphrinta kwephepha.
I-HPMCkuyinto esetshenziswa kabanzi esebenza nge-polymer impahla, esetshenziswa kabanzi ekwakheni, kwezokwelapha, ekudleni, kwamakhemikhali ansuku zonke, okokumboza nezinye izimboni. Inqubo yokukhiqiza yayo ihlanganisa ukuguqulwa kwezinto ezingavuthiwe, i-alkalization, i-etherification, ukuwasha, ukomisa, ukugaya nezinye izinyathelo, isixhumanisi ngasinye sithinta ikhwalithi yomkhiqizo wokugcina. Ngokuthuthukiswa kwezidingo zokuvikelwa kwemvelo kanye nokukhula kwesidingo semakethe, ubuchwepheshe bokukhiqiza be-HPMC buyenziwa ngcono ukuze buhlangabezane nezidingo zezimboni ezengeziwe.
Isikhathi sokuthumela: Mar-25-2025