Uyakwazi ukusebenza kwe-hydroxypropyllylykl methylcellulose?

I-Hydroxypropylm methylcellulose uhlobo lwe-ether exubile exubile. Ngokungafani ne-ionic methyl carboxyyllyl cellulose exutshwe ether, ayiphenduli ngezinsimbi ezisindayo. Ngenxa yezilinganiso ezihlukile zokuqukethwe kwe-methoxyl nokuqukethwe kwe-hydroxypropyl ku-hydroxypropyllylylylylylylylylylylylyrpropyl methylcellulose kanye ne-viscosypropylyl okuqukethwe okuphezulu, okuqukethwe okuphezulu kwe-methoxypropyl, okuqukethwe okuphansi kwe-hydroxypropp kanye nokuqukethwe okuphezulu kwe-hydroxypropyll kusondele kakhulu kwe-hydroxypropylyll methyl cellulose. Kodwa-ke, ezinhlotsheni ngalunye, yize kutholakala inani elincane kuphela le-hydroxypropyl noma inani elincane le-methoxyl Group, kunomehluko omkhulu ku-solubity ku-solvents ye-organic noma amazinga okushisa asele.

(1) Izakhiwo ze-solibity ze-hydroxypropyllllylylylykl methylcellulose

① I-solubity ye-hydroxypropylylyrprose ku-water hydroxypropylylyrlose empeleni uhlobo lwe-methylcellulose luhlobo lwe-methylcellulose olushintshiwe yi-propylene oxide (i-methyl-plulylene), ngakho-ke inezici ezifanayo ne-methyl cellulose enezimpawu ezifanayo zokungena kwamanzi okubandayo 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 kwe-hydroxypropyllyrpropylk mathylcellose aquotulose degree degree ds = 0.46 kanye ne-hydroxypropyll degrenc = 0.46 kungu-500 ° C. Ngokuqondene ne-solubenity yayo emanzini, kuye kwathuthuka kakhulu. Isibonelo, i-hydroxyproppropyllose ye-purvelised methylcellulose (ukwakheka kwe-gramusa

② I-solubity ye-hydroxypropyll methylcellulose ku-organic solvents i-solubity ye-hydroxypropyllylylyly methylcellulose kuma-organic solvents nayo ingcono kunaleyo ye-methylcellulose. I-methylcellose idinga ukuba ne-methoxyls sublieture degree of 2.1 imikhiqizo engenhla, kepha equkethe ama-hydroxypropylll = 1.5 ~ 1.8 ne-metholy ds = 0.2 ~ 1.8, i-hermox ds = 0.2 ~ 1.0, i-thermol solutions, futhi ine-thermos-plastiki I-Solubity. Kuyancibilika futhi kuma-hydrocarbons ahlanganisiwe anjenge-methylene chloride kanye ne-chloroform, kanye nezinto eziphilayo ezifana ne-acetone, isopropanol kanye diacetone utshwala. I-solubility yayo kuma-organic solvents ingcono kune-solubity yamanzi.

. Kukalwa ngo-20 ° C ngekhambi elingu-2% elinamanzi njengezinga. I-viscosity yomkhiqizo ofanayo iyanda ngokwanda kokuhlushwa. Ngemikhiqizo enezinsimbi ezihlukile ze-molecular ekuhlushweni okufanayo, umkhiqizo onesisindo esikhulu samangqamuzana une-viscosity ephezulu. Ubudlelwano bawo ngokushisa buyafana nalokho kwe-methyl cellulose. Lapho izinga lokushisa likhuphuka, ukubonakala kuqala ukwehla, kepha uma kufinyelela emazingeni okushisa athile, ukubonwa kungazelelwe kukhuphuke futhi kwenzeka. Ukushisa kwe-gel kwemikhiqizo ephansi ye-viscosity kuphezulu. kuphezulu. Iphoyinti layo le-gel alihlobene nokubonakala kuphela kwe-ether, kodwa futhi lihlobene nokulinganiswa kokwakheka kwe-Methoxyl Group ne-Hydroxypropp Group in ether kanye nosayizi wenani elihlanganisiwe eliphelele. Kumele kwaziwe ukuthi i-hydroxypropyllylylylys is futhi pseudoplastic, futhi isixazululo sayo sizinzile emazingeni okushisa egumbi ngaphandle kokuwohloka kokubonakaliswa ngaphandle kokuthi kungenzeka ukwehla kwe-enzymatic.

. Usawoti ojwayelekile onjenge-chloride, i-bromide, phosphate, nitrate, njll. Kodwa-ke, ukungezwa kosawoti kunethonya elithile ekushiseni kwe-floccation kwesisombululo salo esinamanzi. Lapho kukhula usawoti, izinga lokushisa le-gel liyancipha. Lapho okuhlushwa usawoti kungaphansi kwephuzu le-floccution, i-viscosity yekhambi livame ukwanda. Ngakho-ke, inani elithile kasawoti lingezwa, ku-application, lingafinyelela umphumela wokuqina ngokwezomnotho ngokwengeziwe. Ngakho-ke, kwezinye izinhlelo zokusebenza, kungcono ukusebenzisa ingxube ye-cellulose ether nosawoti kunokuqoqwa okuphezulu kwesixazululo esiphakeme ukufeza umphumela wokuqina.

. Ingamelana nenani elithile le-acid elikhanyayo, njenge-formic acid, i-acetic acid, i-citric acid, i-soschoric acid, i-boric acid, njll. Kodwa i-acid ehlanganisiwe inomphumela wokunciphisa ukubonwa. I-Alkalis enjenge-caustic soda, i-catash ye-caustic kanye namanzi we-lime ayinawo umphumela kukho, kepha angakhulisa kancane ukubonwa kwesixazululo, bese yehlisa kancane kancane.

. Lawa makhompiyutha e-polymer afaka i-polyethylene glycol, i-polyvinyl acetate, polysilicone, polymethylvinyl siloxane, i-hydroxyyethyl cellulose, ne-methyl cellulose. Amakhompiyutha aphezulu wemvelo afana ne-gum arabic, i-loncist bean gum, karaya gum, njll futhi abe nokuhambisana okuhle nesisombululo sayo. I-Hydroxypropylm methylcellulose nayo ingahlanganiswa ne-mannitol ester noma i-sorbittol ester ye-stearic acid noma i-palmitic acid, futhi ingahlanganiswa ne-glycerin, futhi lezi zinhlaka kanye ne-ndroxypropylylylylylyly pricil for mopulellosizer yepulasitiki.

. Ama-Aldehydes enza i-hydroxypropyllylylylyllelwose infoluble ifaka phakathi i-formaldehyde, i-adipaldehyde, njll lapho usebenzisa i-plyoxal njll. Umthamo walolu hlobo lwe-ejenti exhumanisa nesixazululo ngu-0.2% ~ 10% wesisindo se-ether, mhlawumbe u-7% ~ 10%, u-10% ~ 6% we-GLLOXAL afanele kakhulu. Ngokuvamile, izinga lokushisa lokwelashwa lingu-0 ~ 30 ℃, futhi isikhathi singu-1 ~ 120min. Ukusabela okunqamula kudinga ukwenziwa ngaphansi kwezimo ze-acidic. Ngokuvamile, i-PH yesisombululo ilungiswe cishe nge-2 ~ 6 ngokungeza i-inorganic eqinile i-acid noma i-organic carboxylic acid kusixazululo, mhlawumbe phakathi kuka-4 ~ 6, bese kuthi ama-aldehydes anezelwa ukwenza ukusabela okuwela. I-acid esetshenzisiwe ine-hydrochloric acid, sulfuric acid, i-phosphoric acid, i-acetic acid, i-hydroxy-acetic acid, i-acecinic acetic acid e-acedici acid noma i-acetic acid iluleki, futhi i-formic acid ilungile. I-acid ne-aldehyde nayo ingangezwa ngasikhathi sinye ukuvumela isixazululo ukuthi sibhekane nokuphendula okuxhumanisayo ngaphakathi kwebanga le-PH oyifunayo. Lokhu kusabela kuvame ukusetshenziswa kwinqubo yokugcina yokwelashwa kwinqubo yokulungiselela izitha ze-cellulose. Ngemuva kokuthi i-cellulose ether iyi-infoluble, kulula ukuyisebenzisa.

20 ~ 25 ℃ Amanzi okugeza nokuhlanzwa. Lapho umkhiqizo ususetshenziswa, izinto ze-alkaline zingangezwa kwikhambi lomkhiqizo ukuze zilungise i-PH yesisombululo ukuze kube i-alkali, futhi umkhiqizo uzoncibilika kusixazululo ngokushesha. Le ndlela isebenza futhi ekwelapheni le filimu ngemuva kokuthi i-cellulose ether solution yenziwa ngefilimu ukuze ikwenze kube yifilimu elingafakwanga.

. Eqenjini ngalinye ecaleni le-cellulose alifani ngokwanele, futhi ama-microorganisms angakhipha eqenjini le-anhydroglucose elingavikelekile ukwakha ushukela, njengezakhi zama-microorganisms ukuze zisinge. Ngakho-ke, uma izinga lokungena esikhundleni sokufaka esikhundleni se-cellulose lenyuka, ukumelana nokuguguleka kwe-enzymatic of cellulose ether kuzokhula. Ngokusho kwemibiko, ngaphansi kwezimo ezilawulwayo, imiphumela ye-hydrolysis ye-enzyme yenziwa, i-viscoveprosial ye-hydroxypropyll methylcellulose (DS = 1.9) yi-7.2%, i-hs = 1.66) yi-3.8%. Kungabonakala ukuthi i-hydroxypropyllylylyll methylcellulose inekhono elinamandla le-enzyme. Ngakho-ke, ukumelana okuhle kwe-enzyme kwe-hydroxypropyllyllylylylylyl, kuhlangene nokungafani kwayo okuhle, ukuqina kanye nezakhiwo ezenziwe ngefilimu, kusetshenziswa izimbobo ze-emulsion zamanzi, njll., Futhi ngokuvamile akudingi ukwengeza ukulondolozwa. Kodwa-ke, ngokugcinwa kwesikhathi eside kwesixazululo noma ukungcoliswa okungenzeka kusuka ngaphandle, okulondoloziwe kungangezwa njengokuqapha, futhi ukukhetha kunganqunywa ngokuya ngezidingo zokugcina zekhambi. I-PhenylMercuric Acetate kanye neManganese FluorilimiLiLiase zisebenza ngokulondolozwa kwezivikelo, kepha bonke banobuthi, ukunaka kumele kukhokhwe ekusebenzeni. Ngokuvamile, 1 ~ 5mg we-phenylmercuph acetate ingangezwa kwisixazululo ilitha ngalinye lomthamo.

. Isixazululo sayo esinamanzi noma isixazululo se-organic solvent sihlanganiswe epuletini yengilazi, futhi kuba namabala futhi sicace bha ngemuva kokomiswa. Nefilimu enzima. Inokumelana kahle nomswakama futhi ihlala iqinile emazingeni okushisa aphezulu. Uma kufakwa i-hygroscopic Plasticizer, ukugcwala kwayo nokuvumelana nezimo kungathuthukiswa. Ngokuya ngcono ukuguquguquka, amapulasitiki afana ne-glycerin ne-sorbibitlol afanele kakhulu. Ngokuvamile, ukugxila kwesixazululo kungu-2% ~ 3%, futhi inani lesesitiki lingu-10% ~ 20% we-cellulose ether. Uma okuqukethwe kwepulasitiki kuphezulu kakhulu, ukucwilisa kokuwohloka komzimba kwe-colloidal kuzokwenzeka ngomswakama ophezulu. Amandla ashubile wefilimu nge-Plistic angeziwe makhulu kakhulu kunalokho ngaphandle kwenqubomgomo, futhi kuyanda ngokwanda kwenani elingeziwe. Ngokuqondene nenhlayiya yefilimu, kukhuphuka nokukhuphuka kwenani lesendi.