1. Izici zomkhiqizo
Isakhiwo samakhemikhali nokwakhekaI-Hydroxypropyl methylcellulose (HPMC)i-cellulose derivative etholwe ukuguqulwa kwamakhemikhali. Kwenziwa kusuka ku-cellulose yemvelo ngokulandelana, ukusabela kwe-hydroxyproppylition. Esakhiweni sayo samangqamuzana, i-cellulose skeleton ixhumeke amayunithi ama-β-d-glucose ngama-β-1,4 glycosidic bond, kanti amaqembu aseceleni ahlanganiswe ne-methyl (-c3hkhoh) ne-hydroxypropl (-c3h'oh).
Izakhiwo Ezibonakalayo
I-Solubinity: I-KimaCell®HPMC iyi-insoluble emanzini kanye ne-organic solvents, kepha ingakha isixazululo se-colloidal esibonakalayo emanzini abandayo. I-solubility yayo ilingana nokuqukethwe kwe-hydroxypropyl kanye ne-methyl ku-molecule.
I-Viscosity: Isixazululo se-HPMC sinokuvunywa okuthile, okuvame ukukhuphuka ngokwanda kwesisindo se-molecular. Uhla lwayo lokubonakayo lubanzi futhi lungashintshwa ngokuya ngesidingo sokuhlangabezana nezidingo zokusetshenziswa kwezinkambu ezahlukahlukene.
Ukuqina okushisayo: I-HPMC inokuqina okuphezulu okushisayo, ingabekezelela izindawo zokushisa eziphakeme, futhi akulula ukubola ngesikhathi sokushisa.
Izakhiwo ezisebenzayo
Impahla eyakha ifilimu: I-HPMC inempahla enhle eyakha ifilimu futhi ingakha isakhiwo sefilimu esisobala futhi esifananayo ngesisombululo samanzi, ngakho-ke ivame ukusetshenziswa njengezinto ze-matrix ezinhlelweni zokukhishwa kwezidakamizwa.
I-Emulsation nokuqina: Ngenxa yomsebenzi wayo ongaphezulu, i-HPMC ivame ukusetshenziswa kuma-emulsions, ukumiswa, ama-gels kanye nezinye izindlela zokuthuthukisa ukuqina kokwakhiwa.
Ukujikeleza nokugcinwa kwamanzi: I-HPMC inezakhiwo ezinhle zokuqina futhi ingakhuphula ukubonwa kwesixazululo ngokugxila okuphansi. Ngaphezu kwalokho, ingagcina ngempumelelo amanzi, ngaleyo ndlela yenza ngcono umthamo wokugcina amanzi womkhiqizo, futhi kuvame ukutholakala kwezimonyo namakhemikhali nsuku zonke.
I-Nonicicity: Njenge-Surficiant ye-Nonionic, i-HPMC ingahlala iqinile nge-acid, i-alkali noma izixazululo kasawoti futhi inokuvumelana okuqinile.
Izindawo zohlelo lokusebenza
Imboni yezemithi: Njengomthwali wezidakamizwa, isetshenziselwa ukulungiselela ukukhishwa okulawulwayo, ukukhishwa okudedelwe kanye nokukhishwa okudedelwe; Kusetshenziswa futhi lapho kulungiswa amaphilisi, ama-caplule kanye namafutha e-topical wezidakamizwa.
Imboni Yokwakha: Njengesengezo, ithuthukisa ukusebenza kokwakha kwezinto zokwakha ezifana nodaka kanye nokugqoka, futhi kuthuthukisa ukunamathela, ubisi lokugcinwa kwamanzi.
Imboni yokudla: Isetshenziswa njenge-fikersener, emulsifier kanye ne-ejenti ye-gelling ekutholeni, i-jelly, u-ayisikhilimu neminye imikhiqizo.
Imboni yezimonyo: Isetshenziswa e-lotion, okhilimu besikhumba, ama-shampoos kanye neminye imikhiqizo ukuhlinzeka ngokubona kanye nokuqina.
2. Indlela ye-Synthesis
I-Cellulose Extraction Inqubo yokuhlelwa ye-Synthesis ye-HPMC okokuqala idinga ukukhipha i-cellulose kwimicu yezitshalo zemvelo (njengokhuni, ukotini, njll.). Ngokuvamile, ukungcola kanye nezinto ezingezona ze-cellulose ezinjenge-lignin ezintweni zokwakha ezivuthiwe zisuswa ngezindlela zamakhemikhali noma ezisebenza ngemishini. Inqubo yeCellulose Extraction Inqubo ikakhulukazi ifaka ukugcobhoza, ukwelashwa kwe-alkali, ukushaya kanye nezinye izinyathelo.
Ukusabela okwenzeka ku-cellulose i-cellulose ekhishwe i-cellulose ithola ukusabela kokuthelwa futhi ingeza ukubandakanywa okufana ne-methyl ne-hydroxyproppy. Ukuphendula okuthe xaxa kuvame ukwenziwa ngesisombululo se-alkaline, futhi ama-ejenti asetshenziswa kakhulu afaka i-methyl chloride (CH3CL), i-propelly oxide (c3h6o), njll.
I-Methylation reaction: I-cellulose iphendulwa nge-methylating ejenti (efana ne-methyl chloride) ukuze amaqembu athile we-hydroxyl (-oh) kuma-molecule we-cellulose athathelwa indawo amaqembu we-methyl (-Och3).
Ukusabela kwe-Hydroxypropylation: Kwethulwa amaqembu we-Hydroxypropyl (-c3h'oh) e-cellulose molecule, i-reagent evame ukusetshenziswa yi-propelene oxide. Kulokhu kusabela, amanye amaqembu e-hydroxyl kuma-molecule we-cellulose athathelwa indawo amaqembu we-hydroxypropyl.
Ukulawulwa kwesimo sokuphendula
Ukushisa nesikhathi: ukusabela kokuthezeka kuvame ukwenziwa ekushiseni kwe-50-70 ° C, nesikhathi sokuphendula siphakathi kwamahora ambalwa nangaphezulu kwamahora ayishumi. Ukushisa okuphezulu kakhulu kungadala ukonakaliswa kweseli, futhi kuphansi kakhulu izinga lokushisa lizophumela ekusebenzeni kahle kokusabela okuphansi.
Ukulawulwa kwenani le-PH: ukusabela kuvame ukwenziwa ngaphansi kwezimo ze-alkaline, ezisiza ukuthuthukisa ukusebenza kahle kokuphendula okuthe xaxa.
Ukuhlushwa kwe-ejenti ye-EThelification: Ukuqoqwa kwe-ejenti yokusheshisa kunethonya elibalulekile kwizakhiwo zomkhiqizo wokuphendula. Ukugxila kwe-ejenti ephakeme okuphezulu kungakhulisa izinga le-hydroxypropyll noma i-methylation yomkhiqizo, ngaleyo ndlela kulungiswe ukusebenza kwe-Kimacell®HPMC.
Ukuhlanzwa futhi ukoma ngemuva kokusabela sekuqediwe, umkhiqizo uvame ukugezwa ngamanzi noma akhishwe nge-solvent ukususa ama-reagents angabhalisiwe nemikhiqizo. I-HPMC ehlanziwe yomisiwe ukuthola umkhiqizo wokugcina we-granular.
Ukulawulwa kwesisindo kwama-molecular ngesikhathi senqubo yokwenza synthesis, isisindo se-molecular se-HPMC singalawulwa ngokulungisa imibandela yokuphendula (njengokushisa, isikhathi, kanye nokuhlushwa kwe-realegent). I-HPMC enezinsimbi ezihlukile zamangqamuzana ahlukile nge-solubity, ukubonana, umphumela wohlelo lokusebenza, njll.
Njenge-polymenctional polymer impahla,I-HPMCisetshenziswa kabanzi kwezokwelapha, ukwakhiwa, kokudla nezimonyo. Ukuqina kwayo okuhle kakhulu, ukukhuphula, ukugcinwa kwamanzi kanye nezakhiwo ezenziwe ngefilimu zikwenza kube yinto ebalulekile eluhlaza yezimboni. Indlela ye-synthesis ye-HPMC ikakhulukazi ngokusabela kokuthenjwa kwe-cellulose. Izimo ezithile zokuphendula (njengokushisa, inani le-PH, ukugxilwa kwe-reagent, njll.) Kudingeka ukuthi lilawulwe kahle ukuthola imikhiqizo ehlangabezana nezidingo. Esikhathini esizayo, imisebenzi ye-HPMC ingaphinde yandiswe emikhakheni eminingi.
Isikhathi Sokuposa: Jan-27-2025