Hydroxypropyl me cellulose hpmc ndi mtundu wa ma cellulose osakaniza ether, zomwe ndizosiyana ndi ionic medilose carboxyl cartalose yosakaniza ether, ndipo sizikugwirizana ndi zitsulo zolemera. Chifukwa cha ma ratios osiyanasiyana a methoxyl zomwe zili mu hydroxypyllulose komanso ma visa osiyanasiyana, ndi mitundu yokhala ndi methose cellose, ndi mitundu yotsika kwambiri Ma hydroxypropyl, ntchito yake ili pafupi ndi ya hydroxypropyl methylcelulose. Komabe, m'mitundu yosiyanasiyana, ngakhale kuchuluka kwa hydroxypyupyl kapena gawo laling'ono la methoxy muli, soluxy yochepa yomwe ili, kusungunuka kosungunuka mwa ordoctont kapena kutentha kwamphamvu mu njira yothetsera matendawa ndi yosiyana kwambiri.
1. Kusungunuka kwa hydroxypropyll methylcellulose
①solublity of Hydroxypropyll Mealulose m'madzi hydroxpyl makamaka celyprose ya ma proypyl cellulose. Cellulose ndiwofanana m'madzi ozizira amasungunuke ndi madzi otentha. Komabe, chifukwa cha gulu la hydroxypyl, kutentha kwake kwa madzi otentha ndikokwera kwambiri kuposa ma cellouse. Mwachitsanzo, mawonekedwe a mankhwala a mankhwala a hydroxypropyl a methylcellulose ndi 2% methoxyl zomwe zili ms = 0.73 ndi hydroxypropyl ps = 0.46 ndi 5 ° CP. Kutentha kwake kwa gel kumatha kuyandikira kwambiri mpaka 100 ° C, pomwe methyllulose kutentha komweko ndi 55 ° C. Ponena za kusungunulera kwake m'madzi, zathandizanso kwambiri. Mwachitsanzo, ma hydroxypropyll methylcellulose (gransilar mawonekedwe a 0,2 ~ 0,5mm pa 20% amatha kugwiritsidwa ntchito mu kutentha kwa 4% kumasungunuka pamadzi osazizira.
② Hydroxypropyl ms = 1.5 ~ 1.8 ndi methoxy ds = 0.2 ~ 1. Imasungunuka mu hlornated hydrocarbons monga chchlorometane ndi chloroform, komanso okhazikika monga acetone, isoppanol ndi mowa wamaselo. Kusungunuka kwake mu ortic sodi yosungunuka ndikwabwino kuposa kusungunuka kwamadzi.
2. Zinthu zomwe zikukhudza mafayilo a hydroxypypyl methylcellulose
Kukopa Zinthu Zosangalatsa za Hydroxypropyl celloul mavidiyo a hydroxypyl, monga cellulose ina, imakhazikika pa yankho la 2% ya madzi okwanira 20%. Makulidwe azomwezi zimawonjezeka ndi kuchuluka kwa ndende. Zogulitsa ndi zolemera zosiyana molecular pamlingo womwewo, zopangidwa ndi zolemera zokulirapo zimakhala ndi mamasukidwe apamwamba. Ubwenzi wake ndi kutentha kwake ndi wofanana ndi wa methyl cellulose. Kutentha kukuwonjezeka, mafayilo amayamba kuchepa, koma ikafika pamawu, mafayilo amawonjezeka ndipo khwalamalo imachitika. Kutentha kwa gel kwa gel otsika mtengo. ndizokwera. Mfundo zake za gellage sikuti zimangokhudzana ndi mafayilo a ether, komanso pachiwopsezo cha methoxy ndi hydroxypropyl mu ether ndi digiri yonse. Tiyenera kudziwa kuti hydroxpyl methylcellulose ilinso preeylclastic ndipo yankho lake ndi yokhazikika mu kutentha kwa ma ville popanda kuwonongeka kwa enzymatic.
3. Hydroxypropyll Methylcellulose asidi ndi alkali kukana
Hydroxypylropyl acid acid ndi alkali kukana hydroxpyl nthawi zambiri amakhazikika ma acid ndi alkali, ndipo sakhudzidwa munthawi ya PH 2 ~ 12. Itha kupirira acid ena. Monga mawonekedwe a actic acid, acetic acid, citric acid, succinic acid, bosphoric acid, boric acid, etc. Komabe, acid okhazikika ali ndi mphamvu yochepetsa mafayilo. Alkali monga caustic soda, caustic positi ndi madzi a laimu alibe mphamvu, koma imatha kuwonjezera mawonekedwe a yankho, kenako padzakhala chofufumitsa cha mtsogolo.
4. Kusakaniza kwa hydroxypropyl methylcellulose
Vutoli la hydroxypropyl methy cellose hydroxypropyl cellouse yankho limatha kusakanizidwa ndi polymer polymer kuti ikhale yunifolomu yokwera. Mafuta awa a polyithylene glycol, polyvinyl acetate, polythiloxane, ma hydroxyethyl cellulose ndi methyl cellulose. Magawo achilengedwe monga chilengedwe chachilengedwe, dzombe la chingamu, kararaya, ndi zina zambiri zosafunikira ndi yankho lake. Hydroxypropyll methylcellulose amathanso kusakanikirana ndi mannitol kapena sorbitol zigawo za steric acid kapena palmitic acid, ndipo amathanso kusakanikirana ndi glycerin, sorbin ndi mannitol. Izi zimagwiritsidwa ntchito ngati hydroxypropyl methylcelulose. Pulasitiki yochokera pa cellulose.
5. Sutullebility ndi madzi kusungunuka kwa hydroxypropyll methylcelulose
Cellose yosungunuka yam'madzi imakhazikika mu cydroxypypyl itha kukhala yopingasa ndi aldehydes, ndipo solweble iyi imakhazikika mu yankho ndikukhala okhazikika m'madzi. Aldeydes omwe amapanga hydroxypylropyl infyllulose infydehyde, glyloxal, chidwi chapadera chiyenera kulipiridwa ku mtengo wa pH. Chifukwa chake, glycoxal nthawi zambiri amagwiritsidwa ntchito ngati wothandizirana pa mafakitale. Mlingo wa mtundu uwu wa wothandizika mu yankho ndi 0,2% ~ 10% ya ether, makamaka ~ 10% ~ 3% ~ 6% ndiye yoyenera kwambiri ku Glyloxal. Kutentha kwakukulu kwa mankhwala ndi 0 ~ 30 ℃, ndipo nthawi yake ndi 1 ~ 120min. Kulumikizana kolumikizana kumafunikira kuchitika pansi pa acidic mikhalidwe. Nthawi zambiri, avoric olimba acid kapena organic Carboxyylic acid amawonjezeredwa ku yankho kuti asinthidwe pafupifupi 4 ~ 6, kenako aldehydes amawonjezeredwa kuti akwaniritse zomwe zikuchitika. . Ma acid omwe amagwiritsidwa ntchito amaphatikizapo hydrochloric acid, sulfuric acid, mafodic acid, acecroxyacentic acid kapena citric acid kapena acetic acid ndi abwino kwambiri. Acid ndi Aldeyde imathanso kuwonjezeredwa nthawi yomweyo kuti mulole yankho ku crossLink mu product. Izi zimagwiritsidwa ntchito nthawi zambiri pamankhwala omaliza pokonza ma cellulose okhazikika. Pambuyo pa cellulose ether ndi incoubilicated, ndikofunikira kusamba ndikuyeretsa ndi madzi pa 20 ~ 25 ° C. Izi zikagwiritsidwa ntchito, zinthu zam'madzi zitha kuwonjezeredwa ku yankho la malonda kuti asinthe PH ya yankho kuti akhale alkaline, ndipo malonda adzasungunuka mu yankho mwachangu. Njirayi imagwiranso ntchito kwa ethel ethel ether soluse yopangidwa mu filimu kenako filimuyo imakonzedwa kuti ipange filimu yopanda insuluble.
6. Hydroxypropyll Methylcellulose sagwirizana ndi michere
Hydroxypropyll methylcellulose sagwirizana ndi michere. M'malingaliro, cellulose, cellulose, monga gulu lirilonse la masirikali onse, limakhala ndi gulu lokhazikika, lomwe silovuta kufesedwa ndi michere ya mmodzi pa cellulose Magulu osagwiritsidwa ntchito a Dyyrogroclucluti Offer kuti apange shuga. , omwe amalowetsedwa ngati michere ya tizilombo tating'onoting'ono. Chifukwa chake, ngati digiri yokhazikika ya cellulose imachuluka, kukana kwa enzymatic enchion of cellulose ethel etheluse kumakulitsa. Amanenedwa kuti kukweza kwa hydroxypypyl (DS = 1.2%, ndi methyllulose (1) Itha kuwoneka kuti luso la anti-enzyme a hydroxypropyll methylcellulose ndi wamphamvu. Chifukwa chake, enzyme yabwino kwambiri ya hydroxypropyl ya methylcellulose, kuphatikiza ndi kuphatikizika kwake kwamphamvu, kukhazikika ndi mawonekedwe a mafilimu, nthawi zambiri sikugwiritsidwa ntchito popanga zolakwika. Komabe, pakusunga kwa nthawi yayitali yankho kapena kuipitsidwa kwa zakunja, zoteteza kuti zitha kuwonjezeredwa ngati kusamala, ndipo kusankha kumatha kutsimikizika molingana ndi zofunikira zothetsera vutoli. Phenylmercuric acetate ndi quorivatival osungirako mangondo othandiza, koma ali ndi zoopsa, chidwi chiyenera kulipidwa ku opareshoni, ndipo mlingowu mwina ndi 1 ~ 5mg ya phenylmecuric acetate pa lita imodzi yankho la yankho.
7. Katundu wa hydroxypropyl filimu filimu
Kuchita kwa hydroxypropyl fitylcellulose Filimu Hydroxyprosel Ndi filimu yolimba. Ili ndi chinyontho chabwino ndipo khalani otentha kutentha kwambiri. Mwachitsanzo, kuwonjezera pulasitiki ya hygroscopic imatha kukulitsa mphamvu zake komanso kusinthasintha. Kusintha kusintha, ma pulasitiki monga glycerin ndi sorbitel ndiye oyenera kwambiri. Yankho la General ndende ndi 2% ~ 3%, ndi kuchuluka kwa pulasitiki ndi 10% ~ 20% ya cellulose ether ether. Ngati zomwe zili mu pulasitiki ndizokwera kwambiri, shringnomen chovuta cha ma dehloid dzingu limapezeka pansi pa chinyezi chambiri. Mphamvu ya filimuyo ndi pulasitiki yowonjezera ndi yayikulu kuposa yomwe popanda pulasikitala, ndipo imachulukitsa ndi kuchuluka kwa kuchuluka kowonjezeredwa. Ponena za hygroscopicity ya filimuyo, zimawonjezeranso ndi kuchuluka kwa pulasitiki.
Post Nthawi: Feb-20-2025