I-Hydroxypropylylylylylylyll pullulose HPMC uhlobo lwe-ether ye-ether exubile, ehlukile ku-ionic methyl carboxylylylylylylylylylylyllyllylylyllyllyls motorboseyllyllyllyl tullosesyllyl tuli Ngenxa yezilinganiso ezihlukile zokuqukethwe kwe-methoxyl nokuqukethwe kwe-hydroxypropyl ku-hydroxypropyllylylylylylyll methylcellulose kanye ne-viscosities ehlukene, okuqukethwe okuphansi kwe-methoxypropyl, okuqukethwe okuphansi kwe-methoxypropp, okuqukethwe okuphansi kwe-hydroxypropyl, ukusebenza kwawo kusondele kulowo I-Hydroxypropyl methylcellulose. Kodwa-ke, ezinhlotsheni ezahlukahlukene, yize kuphela inani elincane le-hydroxypropyll noma inani elincane le-methoxy eliqukethwe, ukuboleka ezinhlafunweni ze-organic noma izinga lokushisa le-floccation ku-aquod solution kuhluke kakhulu.
1. I-solubity ye-hydroxypropyllylylylylylylyllose methylcellulose
Ukusetshenziswa kwe-hydroxypropyllylyllylylylylll ku-Water Hydroxypropylllylylylyl methylsylllyrlopyllylylyrlopylllyrlopyllyllylyllypropyllypropyllopyrlopyllylylm methyl cellulose empeleni i-methyl celtule I-cellulose iyafana kumanzi abandayo we-solubility kanye nokungena kwamanzi okushisayo. Kodwa-ke, ngenxa yeqembu le-hydroxypropyl eguquliwe, izinga lokushisa laso le-gelation emanzini ashisayo liphakeme kakhulu kunalelo methyl cellulose. Isibonelo, ukubonwa kwesisombululo esinamanzi se-hydroxypropyllylylyl methylcellulose nge-2% okuqukethwe kwe-methoxyl DS = 0.73 kanye ne-hydroxypropyllll = 0.46 ngu-500 MPA ama-20 ° C. Izinga lokushisa layo le-gel lingafinyelela kusondele ku-100 ° C, ngenkathi ama-methylcellose kumazinga okushisa afanayo acishe abe ngu-55 ° C. Ngokuqondene ne-solubenity yayo emanzini, kuye kwathuthuka kakhulu. Isibonelo, i-hydroxyproppropyllose ye-purverised methylcellulose (ukwakheka kwe-granular of 0.2 ~ 0.5mm ngo-20 ° C nge-viscosity yesisombululo esingamanzi esingu-4% kuze kufike kumazinga okushisa egumbini, kuncibilika kalula emanzini ngaphandle kokupholisa.
②The solubility of hydroxypropyl methyl cellulose in organic solvents The solubility of hydroxypropyl methyl cellulose in organic solvents is also better than that of methyl cellulose, and methyl cellulose needs to have a degree of methoxyl substitution at Products above 2.1, and high-viscosity hydroxypropyl methylcellulose containing hydroxypropyl MS = 1.5 ~ 1.8 ne-Methoxy DS = 0.2 ~ 1.0, kanye nenani eliphelele lokufakwa ngenhla kwe-methanol ne-ethanol solutions methanol kanye ne-ethanol solutions medium, i-thermoplastic kanye namanzi. Kuyancibilika futhi kuma-hydrocarbons ahlanganisiwe anjenge-dichlorethane ne-chloroform, nasezinhlelweni ze-organic ezifana ne-acetone, i-sopropanol kanye ne-diacetone utshwala. I-solubility yayo ku-organic solvents ingcono kune-soluble yamanzi.
2. Izici ezithinta ukubonwa kwe-hydroxypropyllylyll methylcellulose
Ukuthonya izinto ze-hydroxypropyllylylylylylylylylyll methylulose viscosity ukunqunywa okujwayelekile kwe-viscoxyproty methyl cellulose, njengamanye amasembu we-cellulose, kususelwa kukhambi elingu-2% c. I-viscosity yomkhiqizo ofanayo iyanda ngokwanda kokuhlushwa. Ngemikhiqizo enezinsimbi ezihlukile ze-molecular ekuhlushweni okufanayo, imikhiqizo enezinsimbi ezinkulu zamangqamuzana inokubona okuphezulu. Ubudlelwano bawo ngokushisa buyafana nalokho kwe-methyl cellulose. Lapho izinga lokushisa likhuphuka, ukubonakala kuqala ukwehla, kepha uma kufinyelela emazingeni okushisa athile, ukubonakala kwandiswa kungazelelwe nokubheja kwenzeka. Ukushisa kwe-gel kwemikhiqizo ephansi ye-viscosity kuphezulu. kuphezulu. Iphoyinti layo le-gel alihlobene nokuvunywa kwe-ether kuphela, kodwa futhi nasekulinganisweni kokwakheka kwe-methoxy ne-hydroxypropyl ku-Ether kanye ne-degree ephelele yokufaka esikhundleni. Kumele kwaziwe ukuthi i-hydroxypropyllylylylyly futhi i-pseudoplastic futhi isixazululo sayo sizinzile emazingeni okushisa asekamelweni ngaphandle kokuwohloka kwe-viscosity ngaphandle kokuthi kungenzeka ukwehla kwe-enzymatic.
3. I-Hydroxypropyll methylcellulose acid kanye ne-alkali ukumelana
I-Hydroxypropylm methylcellulose acid kanye ne-alkali yokumelana ne-hydroxypropylll methylcellulose ngokuvamile zizinza i-acid ne-alkali, futhi azithintwa ebangeni le-PH 2 ~ 12. Ingamelana nenani elithile le-acid elikhanyayo. Njenge-acid ye-formic, i-acetic acid, i-citric acid, i-succinic acid, i-phosphoric acid, i-boric acid, njll. Noma kunjalo, i-acid egxilile inomphumela wokunciphisa ukubonwa. I-Alkali enjenge-caustic soda, i-catash ye-caustic kanye namanzi okulamula ayinawo umphumela kukho, kepha ingakhulisa kancane ukubonwa kwesixazululo, bese kuba khona into ehle kakhulu ngokuzayo.
I-4. Ukuhlangana kwe-hydroxypropylllylyll methylcellulose
Miscibility of Hydroxypropyl Methyl Cellulose Hydroxypropyl methyl cellulose solution can be mixed with water-soluble polymer compound to become a uniform and transparent solution with higher viscosity. Lezi zinhlaka ze-polymer zifaka i-polyethylene glycol, i-polyvinyl acetate, polysiloxane, polymethyl vinyl siloxane, hydroxyethyl vinyl siloxane, hydroxyyethyl cellulose kanye methyl cellulose. Amakhompiyutha e-polymer afana ne-gum arabic, i-loncist bean gum, karaya gum, njll futhi abe nokuhlangana okuhle nesisombululo sayo. I-Hydroxypropyl methylcellulose ingahlanganiswa ne-mannitol noma i-sorbibittol esters ye-stearic acid noma i-palmitic acid, futhi ingahlanganiswa ne-glycerin, i-sorbittol kanye ne-mannitol. Lezi zinhlanganisela zingasetshenziswa njenge-hydroxypropyllylyll methylcellulose. I-Cellulose-based Plosical.
I-5
I-Pelloxyprose I-Telluble Palloxyproselylylylylylylylyl methylcellulose ingaba yinto ebunjiwe ngama-aldehydes, futhi lezi zindlebe ezinamanzi zinxusekile kwikhambi futhi zibe insoluble emanzini. Ama-Aldehydes enza i-hydroxypropylllylylylylyllelwose infoluble ifake phakathi i-formaldehyde, i-glycaldehyde, i-adipaldehyde, njll lapho usebenzisa i-formaldehyde, ukunakekelwa okukhethekile kufanele kukhokhwe kwinani lekhambi, phakathi kwalo i-Glloxos asabela ngokushesha. Ngakho-ke, i-GYLOXAL ivame ukusetshenziswa njenge-ejenti yokuwela ekukhiqizweni kwezimboni. Umthamo walolu hlobo lwe-ejenti yokuwela kwisixazululo ngu-0.2% ~ 10% we-Ether Mass, mhlawumbe u-7% ~ 10%, kanye ne-3.3% ~ 6% ilungele kakhulu i-GLLOXAL. I-General Treatment Temperatite ingu-0 ~ 30 ℃, futhi isikhathi singu-1 ~ 120min. Ukusabela okuxhumanisa ngokuwela kudinga ukwenziwa ngaphansi kwezimo ze-acidic. Ngokuvamile, i-inorganic enamandla ye-acid noma i-organic carboxylic acid ingezwe kwisixazululo sokulungisa i-ph yesisombululo esingaba ngu-2 ~ 6, mhlawumbe phakathi kuka-4 ~ 6, bese ama-aldehydes angeziwe ekwenzeni ukusabela okuxhumanisayo. . Ama-acid asetshenzisiwe afaka i-hydrochloric acid, i-sulfuric acid, i-phosphoric acid, i-acetic acid, i-hydroxyacetic acid, i-acecinic acid acid, futhi i-acetic acid efanelekile, futhi i-formic acid ilungele kakhulu. I-acid ne-aldehyde nayo ingangezwa ngasikhathi sinye ukuvumela ikhambi linqamule ebangeni elifunekayo le-PH. Lokhu kusabela kuvame ukusetshenziswa kwinqubo yokugcina yokwelashwa kwinqubo yokulungiselela izitha ze-cellulose. Ngemuva kokuthi i-cellulose ether iyinto engafakwanga ngaphakathi, kufanelekile ukugeza futhi ukuhlanza ngamanzi ngo-20 ~ 25 ° C. Lapho umkhiqizo ususetshenziswa, into ye-alkaline ingangezwa kwikhambi lomkhiqizo ukuze uguqule i-PH yesisombululo ukuze ube yi-alkali, futhi umkhiqizo uzoncibilika kusixazululo ngokushesha. Le ndlela isebenza futhi kwikhambi le-cellulose ether lenziwe kwifilimu bese ifilimu iyacutshungulwa ukuyenza ifilimu elingafakwanga.
I-6. I-Hydroxypropylly methylcellulose imelana nama-enzyme
I-Hydroxypropyl methylcellulose imelana nama-enzyme. Emcabangweni, ama-cellulose derivatives, njengeqembu ngalinye le-anhydroglucose, aneqembu elihlanganiswe ngokuqinile, kodwa empeleni inani elinqunyelwe lapho i-enzyme, futhi isho ukuthi i-enzyment yeqembu ngalinye ku-cellulose chain afanelwe ngokwanele, futhi ama-microorganisms angavutha Amaqembu angenasisekelo anhydroglucose ukwakha ushukela. , ezidonswa njengezakhi zama-microorganisms. Ngakho-ke, uma izinga lokufaka esikhundleni se-Etherfication Supliose lenyuka, ukumelana nokuguguleka kwe-enzymatic of cellulose ether kuyathuthukiswa. Kubikwa ukuthi i-Viscosity eyinsalela ye-hydroxypropyll methylcellulose (DS = 1.9) ingu-13.2%, i-methylcellulose (DS = 1.66) yi-3.8%, kanye ne-hydroxyethyl cellulose yi-1.7%. Kungabonakala ukuthi amandla alwa ne-enzyme we-hydroxypropylylylylylylylylylyls iqinile. Ngakho-ke, ukumelana okuhle kwe-enzyme kwe-hydroxypropyllylylylylylyl, kuhlangene nokungafani kwayo okuhle, ukuqina kanye nezakhiwo ezenziwe ngefilimu, kuvame ukusetshenziswa embozweni we-emulsion, njll., Futhi ngokuvamile akudingi ukwengezwa kwezindawo zokugcina. Kodwa-ke, ngokugcinwa kwesikhathi eside kwesisombululo noma ukungcoliswa kwezwe elingaphandle, okulondoloziwe kungangezwa njengokuphepha, futhi ukukhetha kunganqunywa ngokuya ngezidingo zokugcina zekhambi. I-PhenylMercuric Acetate kanye neManganese Fluorisiluas yizivikelo ezisebenzayo, kepha zinobuthi bobabili, ukunakwa kumele kukhokhwe ekusebenzeni, futhi umthamo ngokuvamile u-1 ~ 5mg wePhenylmercuric Acetate ngelitha.
7. Izakhiwo zeHydroxypropyllylyll methylcellulose film
Ukusebenza kwe-hydroxypropylll methyllellose film hydroxyprosellllylyll methylcellulose inezakhiwo ezinhle kakhulu zefilimu, nesisombululo sayo esinamanzi noma isixazululo se-organic solvent senziwe ngombala ngemuva kokomiswa. Nefilimu enzima. Inokumelana kahle nomswakama futhi ihlala iqinile emazingeni okushisa aphezulu. Isibonelo, ukungeza i-hygroscopic Plasticizer kungathuthukisa ukugcwala kwayo nokuvumelana nezimo. Ukwenza ngcono ukuvumelana nezimo, amapulasitiki afana ne-glycerin ne-sorbibitlol afanele kakhulu. Ukuhlushwa okujwayelekile kwesixazululo kungu-2% ~ 3%, futhi inani lesesitiki lingu-10% ~ 20% we-cellulose ether. Uma okuqukethwe kwepulasitiki kuphezulu kakhulu, i-shrinkage ye-shromenon ye-colloid dehydration izokwenzeka ngaphansi komswakama ophezulu. Amandla ashubile wefilimu nge-Plistic angeziwe makhulu kakhulu kunalokho ngaphandle kwenqubomgomo, futhi kuyanda ngokwanda kwenani elingeziwe. Ngokuqondene nenhlanzeko yefilimu, futhi iyanda ngokwanda kwenani lesesimo.
Isikhathi sePosi: Feb-20-2025