Hydroxypropyl methyl cellulose, ma ogtahay?

1.HPMCwaxa loo qaybiyaa nooca degdega ah iyo nooca fidinta degdega ah.

Nooca fidinta degdega ah ee HPMC waxaa lagu dhejiyay xarafka S, glioxalna waa in lagu daraa inta lagu jiro habka wax soo saarka.

Nooca degdega ah ee HPMC kuma darto xarfo, sida "100000" macnaheedu waa "100000 viscosity.

2. Iyadoo S ama la'aanteed, sifooyinku way kala duwan yihiin

HPMC si degdeg ah ayey u kala firdhisaa marka ay la kulanto biyo qabow oo ku baaba'aan biyaha. Waqtigaan, dareeruhu ma laha viscosity, sababtoo ah HPMC waxa kaliya oo lagu kala firdhiyey biyaha iyada oo aan lahayn milmo dhab ah. Qiyaastii laba daqiiqo ka dib, viscosity ee dareeraha ayaa si tartiib tartiib ah u kordhaya, samaynta kolloid qaro leh oo muuqda.

HPMC degdega ah ayaa loogu kala firdhi karaa biyo kulul qiyaastii 70°C. Marka heerkulku hoos ugu dhaco heerkul gaar ah, mawgu si tartiib ah ayuu u soo muuqan doonaa ilaa kolloid viscous ah oo hufan laga sameeyo.

3. Iyadoo ama la'aanteed S, ujeedadu way ka duwan tahay

HPMC degdega ah waxa loo isticmaali karaa oo kaliya budada shubka ah iyo hoobiye. Xabagta dareeraha ah, rinjiga iyo alaabta dhaqida, waxaa jiri doona ifafaale kooxeysi oo lama isticmaali karo.

Si degdeg ah ayaa loo kala firdhiyeyHPMCwaxay leedahay codsiyo kala duwan waxaana loo isticmaali karaa budada putty, hoobiye, xabagta dareeraha ah, rinjiga, iyo alaabta dhaqida iyada oo aan wax khilaaf ah lahayn.

4.Qaabka kala diridda

4-1. Qaado qadarka loo baahan yahay ee biyaha kulul, ku rid weel oo kuleyl ka sarreeya 80 ° C, oo si tartiib ah ugu dar alaabtan adigoo hoos u walaaqaya. Cellulose-ku waxa uu sabbeeyaa biyaha oogada sare marka hore, laakiin si tartiib tartiib ah ayaa loo kala firdhiyaa si ay u sameeyaan slurry labis ah. Xalka ayaa la qaboojiyey marka la walaaqayo.

4-2. Haddii kale, kuleyli 1/3 ama 2/3 ee biyaha kulul ilaa 85 ° C, ku dar cellulose si aad u hesho slurry biyo kulul, ka dibna ku dar inta hartay ee biyo qabow, sii walaaq, oo qabooji isku dhafka ka dhashay.

4-3. Mesh-ka cellulose waa mid aad u fiican, waxayna u jirtaa sida qaybo yaryar oo gaar ah oo ku jira budada siman ee la walaaqay, waxayna si dhakhso ah u milaan marka ay la kulmaan biyaha si ay u sameeyaan viscosity loo baahan yahay.

4-4. Si tartiib ah oo siman ugu dar cellulose heerkulka qolka, oo sii walaaq ilaa xal hufan laga sameeyo.

5.Waa maxay arrimaha saameeya haynta biyaha ee hydroxypropyl methyl cellulose?

5-1. Celcelis ahaan ether HPMC homogeneity

HPMC, metoxyl iyo hydroxypropoxyl oo si siman looga falceliyay ayaa si siman loo qaybiyay, heerka haynta biyuhuna waa sarreeyaa.

5-2. Cellulose ether HPMC heerkulka jelka kulaylka

Heerkulka jelka kuleylka sarreeya, ayaa sarreeya heerka haynta biyaha; haddii kale, waa yaraanta heerka haynta biyaha.

5-3. Cellulose Ether HPMC Viscosity

Marka viscosity ee HPMC uu kordho, heerka haynta biyaha sidoo kale wuu kordhiyaa; marka viscosity uu gaaro heer gaar ah, kororka heerka haynta biyuhu waxay u egtahay mid dabacsan.

6. Qadarka dheeriga ah ee cellulose ether HPMC

Inta badan xaddiga ether celluloseHPMCku daray, sare u kaca heerka haynta biyaha iyo si fiican u haynta biyaha.

Inta u dhaxaysa 0.25-0.6%, heerka haynta biyaha ayaa si degdeg ah u kordhay iyada oo korodhka qaddarka dheeriga ah; markii lacagta dheeriga ah ay sii korodhay, isbeddelka korodhka ee xajinta biyaha ayaa hoos u dhacay.