Dhismaha gaarka ah ee hydroxypropyl methyl cellulose si looga fogaado in qoyaanka infiltration in derbiga, waxay noqon doontaa oo kaliya qadarka saxda ah ee qoyaan ku joogi kartaa sibidhka hoobiye soo saara waxqabadka wanaagsan ee biyaha iyo doorka hydroxypropyl methyl cellulose ee hoobiye waxay noqon kartaa saami si viscosity ah, mar kasta oo ay sare u kacdo viscosity ee haynta biyaha hydroxypropyl methyl cellulose way fiicnaan doontaa.
Marka qoyaanka hydroxypropyl methyl cellulose uu aad u sarreeyo, haynta biyaha ee hydroxypropyl methyl cellulose ayaa hoos u dhici doonta, waxayna si toos ah u horseedi doontaa waxtarka dhismaha ee hydroxypropyl methyl cellulose.Waxaan sidoo kale la soconaa waxyaabaha ay noqon doonaan kuwo aad u fudud in la sameeyo qaladaad, waa in aan had iyo jeer cusub, waxaan heli doonaa natiijooyin lama filaan ah.
Viscosity-ka muuqda waa tusaha muhiimka ah ee hydroxypropyl methyl cellulose.Hababka cabbiraadda caadiga ah waa cabbiraadda viscosity-ka wareeg, cabbirka viscosity capillary iyo cabbirka viscosity cabbirka.
Markii hore, hydroxypropyl methyl cellulose waxaa lagu go'aamiyay cabbirka viscosity capillary, iyadoo la isticmaalayo viskometer Uhnscher.Xalka cabbirka badiyaa waa xal aqueous ah oo ah 2, qaacidaduna waa: V=Kdt.V waa viscosity ee ilbidhiqsiyo gudahood, K waa joogtaynta viscometerka, D waa cufnaanta heerkulka joogtada ah, T waa wakhtiga ay qaadanayso in ay kor ilaa hoos uga gudubto viscometer gudahood.Habkani waa mid aad u dhib badan, haddii ay jiraan walxo aan la milmi karin, way fududahay in la sameeyo khaladaad, way adagtahay in la aqoonsado tayada hydroxypropyl methylcellulose.
Dhibaatada dhismaha xabagta koollada waa dhibaato weyn oo ay la kulmaan macaamiisha.Ugu horreyntii, dhibaatada alaabta ceeriin waa in la tixgeliyaa si loo dhiso xayndaabyada xabagta.Sababta ugu weyn ee loo dhisayo dhuujinta xabagta waa iswaafajin la'aanta u dhaxaysa alkolada polyvinyl (PVA) iyo hydroxypropyl methylcellulose (HPMC).Sababta labaad ayaa ah in wakhtiga isku dhafka ahi aanu ku filnayn;Waxa kale oo jira xabagta dhismaha oo aan fiicnayn.
Marka la dhisayo xabagta, degdegga ah hydroxypropyl methylcellulose (HPMC) waa in la isticmaalaa sababtoo ah HPMC waxa ay ku kala firirsan tahay oo kaliya biyaha oo ma milmaan.Qiyaastii 2 daqiiqo, viscosity ee dareeraha ayaa si tartiib ah u kordheysa, samaynta kolloid viscos ah oo hufan.
Alaabooyinka kulul ee kulul, biyaha qabow, si degdeg ah ayaa loogu kala firdhi karaa biyo kulul, baaba'aan biyaha kulul, marka heerkulku hoos u dhaco heerkul gaar ah, viscosity si tartiib ah ayaa u muuqda, ilaa sameynta kolloid viscous hufan.Hydroxypropyl methylcellulose (HPMC) oo ku jira xabagta dhismaha ayaa lagu talinayaa 2-4kg.
Hydroxypropyl methyl cellulose (HPMC) ee dhismaha xabagta xabagta xasiloonida kiimikada, caariyaysi, saamaynta xajinta biyaha waa wanaagsan yahay, oo aan saameyn ku yeelan isbedelka PH, viscosity ka 100 000 S - 200 000 S waa la isticmaali karaa.Laakiin in wax soo saarka ma aha sare viscosity waa ka wanaagsan yahay, viscosity iyo xoogga bond waa ka soo horjeeda saamiga, sare viscosity, xoog waa yar yahay, guud ahaan 100,000S viscosity waa ku haboon.
Waqtiga post: Seb-16-2022