Haysashada biyaha ee hydroxypropyl methylcellulose ether
Haysashada biyaha ee hoobiye isku dhafka qallalan waxaa loola jeedaa awoodda hoobiye si uu u qabto oo uu u xiro biyaha. Markasta oo uu sareeyo viscosity of hydroxypropyl methylcellulose ether, ayaa ka sii wanagsan sii haynta biyaha. Sababtoo ah qaab dhismeedka cellulose wuxuu ka kooban yahay hydroxyl iyo ether bonds, atomiyada oksijiinta ee hydroxyl iyo kooxaha ether bond waxay la xiriiraan molecules biyaha si ay u sameeyaan bonds hydrogen, si ay biyaha xorta ah u noqdaan biyo xidhxidhan oo isku xira biyaha, sidaas darteed waxay door ka ciyaaraan ilaalinta biyaha.
Solubility of Hydroxypropyl Methyl Cellulose Ether
1. Ether-ka unugga unugga ah ee unugga ah waa sahlan tahay in lagu kala firdhiyo biyaha iyada oo aan la kicin, laakiin heerka kala diriddu aad ayuu u gaabiyaa. Eter-ka cellulose ee ka hooseeya 60 mesh wuxuu ku milmay biyaha ilaa 60 daqiiqo.
2. Ether-ka qayb ka mid ah cellulose-ka-yar ayaa si sahlan loogu kala firdhiyaa biyaha iyada oo aan la kicin, iyo heerka kala diriddu waa dhexdhexaad. Eter cellulose ee ka sarreeya mesh 80 ayaa ku milmay biyaha ilaa 3 daqiiqo.
3. Ether unug unug unug ah oo aad u-fiican ayaa si degdeg ah ugu firdhiya biyaha, si dhakhso ah ayey u milaan, waxayna u sameeyaan viscosity si dhakhso ah. Eter cellulose ee ka sarreeya 120 mesh wuxuu ku milmaa biyaha ilaa 10-30 ilbiriqsi.
Qaybaha ugu fiican ee hydroxypropyl methylcellulose ether, ayaa sii wanagsan sii haynta biyaha. Dusha sare ee ether cellulose-hadhuudh-dhuuban ayaa milantaa isla markiiba ka dib markaad la xiriirto biyaha waxayna sameeyaan ifafaale jel. Xabagtu waxay duubtaa walxaha si ay uga hortagto molecules biyuhu inay sii wadaan inay galaan. Mararka qaarkood si isku mid ah looma kala firdhi karo oo looma milmi karo xitaa ka dib marka wakhti dheer la walaaqo, samaynta xal qulqulaya oo daruuro leh ama kacsan. Qaybaha ganaaxa way kala firdhiyaan oo milaan isla markiiba ka dib marka ay la xiriiraan biyaha si ay u sameeyaan viscosity isku mid ah.
Qiimaha PH ee hydroxypropyl methylcellulose ether (dib u dhigista ama saameynta hore ee xoogga)
Qiimaha pH ee warshadeeyayaasha ether-ka ee hydroxypropyl methylcellulose ee guriga iyo dibadda waxaa asal ahaan lagu xakameynayaa qiyaastii 7, taas oo ku jirta xaalad acidic ah. Sababtoo ah weli waxaa jira tiro badan oo ah qaababka giraanta anhydroglucose ee qaab dhismeedka molecular ee ether-ka cellulose, giraanta anhydroglucose waa kooxda ugu weyn ee keenta dib u dhaca sibidhka. Giraanta anhydroglucose waxay ka dhigi kartaa ions calcium ee xalka fuuq-celinta sibidhka waxay dhalin kartaa xeryahooda molecular sonkorta-calcium, waxay yareeyaan diiradda calcium ion inta lagu jiro xilliga kicinta ee fuuq-celinta sibidhka, ka hortagga samaynta iyo roobabka calcium hydroxide iyo crystals cusbada calcium, iyo dib u dhigista fuuq-celinta sibidh. habka. Haddii qiimaha PH uu ku jiro xaalad alkaline ah, hoobiyeku wuxuu ka soo muuqan doonaa xaalad hore oo xoog leh. Hadda warshadaha intooda badani waxay isticmaalaan sodium carbonate si ay u hagaajiyaan qiimaha pH. Sodium carbonate waa nooc ka mid ah wakiilka deg-degga ah. Sodium carbonate waxay wanaajisaa waxqabadka dusha sare ee qaybaha sibidhka, waxay kor u qaadaa isku xidhka qaybaha, waxayna sii wanaajisaa viscosity ee hoobiye. Isla mar ahaantaana, kaarboonka sodium wuxuu si dhakhso ah ugu daraa ions calcium ee hoobiye si kor loogu qaado samaynta ettringite, iyo sibidhka si degdeg ah u xinjirowga. Sidaa darteed, qiimaha pH waa in lagu hagaajiyaa iyadoo loo eegayo macaamiisha kala duwan ee habka wax soo saarka dhabta ah.
Hababka ku biirista hawada ee Hydroxypropyl Methyl Cellulose Ether
Saamaynta hawo-mareenka ee hydroxypropyl methylcellulose ether waa inta badan sababtoo ah ether cellulose sidoo kale waa nooc ka mid ah surfactant. Dhaqdhaqaaqa isdhexgalka ee ether cellulose waxay inta badan ku dhacdaa isdhexgalka gaaska-dareere-adag. Marka hore, hordhaca ah xumbo hawada, oo ay ku xigto kala firdhiso iyo saamaynta qoynta. Ether Cellulose waxaa ku jira kooxo alkyl ah, kuwaas oo si weyn u yareeya xiisadda dusha sare iyo tamarta isdhaafsiga ee biyaha, taas oo sahlaysa in ay abuuraan xumbo yar yar oo xiran inta lagu jiro habka walaaqaya ee xalka aqueous.
Qalabka Jeelka ee Hydroxypropyl Methyl Cellulose Ether
Ka dib marka ether-ka hydroxypropyl methylcellulose uu ku milmo hoobiye, kooxaha methoxyl iyo hydroxypropyl ee silsiladda kelli waxay ka falcelinayaan ion calcium iyo aluminium aluminium ee dareeraha si ay u sameeyaan jel viscous ah oo buuxiya madhan hoobiye sibidhka. , hagaajinta cufan ee hoobiye, ciyaara doorka buuxinta dabacsan iyo xoojinta. Si kastaba ha ahaatee, marka matrix-ka isku-dhafka ah uu cadaadis saaran yahay, polymer-ku ma ciyaari karo door taageero oo adag, sidaas darteed xoogga iyo saamiga laalaab ee hoobiye ayaa hoos u dhacaya.
Samaynta Filimka Hydroxypropyl Methyl Cellulose Ether
Ka dib markii hydroxypropyl methyl cellulose ether lagu daro fuuq-celinta, lakab khafiif ah oo filimka cinjirka ah ayaa ka dhex abuurmay qaybaha sibidhka. Filimkani wuxuu leeyahay saameyn dabool ah wuxuuna hagaajiyaa qallajinta dusha sare ee hoobiye. Sababtoo ah haynta biyaha wanaagsan ee hydroxypropyl methylcellulose ether, molecules biyaha ku filan ayaa lagu kaydiyaa gudaha hoobiye, si loo hubiyo adkeynta fuuq-celinta ee sibidhka iyo horumarinta buuxda ee xoogga, hagaajinta xoogga isku-xidhka ee hoobiye, isla markaana waxay wanaajisaa isku xidhka hoobiyeyaasha, waxay ka dhigtaa hoobiye inay yeeshaan caag wanaagsan iyo dabacsanaan, waxayna yaraynaysaa yaraanshaha iyo qallafsanaanta hoobiye.
Waqtiga boostada: Meey-23-2023