1. HPMC waxa loo qaybiyaa nooca degdega ah iyo nooca firdhisan ee degdega ah.
Nooca fidinta degdega ah ee HPMC waxa uu leeyahay xarafka S oo ah lifaaq ahaan. Glyoxal waa in lagu daraa inta lagu jiro habka wax soo saarka.
Nooca deg-degga ah ee HPMC kuma darto xarfo, sida "100000″" macnaheedu waa "100000 viscosity si degdeg ah u firdhinta HPMC".
2. Iyadoo S ama la'aanteed, sifooyinku way kala duwan yihiin
Sida degdega ah ee HPMC u kala firdhiso waxay si degdeg ah ugu firdhisaa biyo qabow waxayna ku baaba'aysaa biyaha. Dareeraha wakhtigan ma laha viscosity sababtoo ah HPMC kaliya ayaa lagu kala firdhiyey biyaha oo aan runtii milmin. Qiyaastii laba daqiiqo ka dib, viscosity ee dareeraha ayaa si tartiib tartiib ah u kordheysa, samaynta dareere muuqaal ah oo hufan. Kolloid qaro weyn.
HPMC isla markiiba waxaa lagu kala firdhi karaa biyo kulul agagaarka 70°C. Marka heerkulku hoos u dhaco heerkul gaar ah, mawgu si tartiib ah ayuu u soo baxayaa ilaa kolloid viscous ah oo hufan laga sameeyo.
3. S ama la'aanteed, ujeedadu way ka duwan tahay
HPMC degdega ah waxa loo isticmaali karaa oo kaliya budada shubka ah iyo hoobiye. Xabagta dareeraha ah, rinjiga iyo sahayda nadiifinta, xabagta ayaa laga yaabaa inay ku dhacaan oo noqdaan kuwo aan la isticmaali karin.
Sida degdega ah ee loo kala firdhiyo HPMC waxay leedahay codsiyo kala duwan. Waxaa loo isticmaali karaa budada suufka ah, hoobiye, xabagta dareeraha ah, rinjiga, iyo sahayda nadiifinta iyada oo aan wax khilaaf ah lahayn.
habka kala dirid
1. Qaado qiyaasta biyaha kulul ee loo baahan yahay, ku rid weel oo kuleyli ilaa 80 ℃, ka dibna si tartiib ah ugu dar alaabtan adigoo si tartiib ah u walaaqaya. Cellulose-ku waxa uu sabbeeyaa biyaha oogada sare marka hore, laakiin si tartiib ah ayuu u kala firdhiyaa si uu u sameeyo slurry labis ah. Qabooji xalka marka aad kareyso.
2. Ama 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, si joogto ah u walaaq, oo qabooji isku dhafka ka dhashay.
3. Cellulose waxa ay leedahay cabbir mesh ah oo aad u fiican oo u jira sida qaybo yaryar oo keliya oo ku jira budada si isku mid ah loo walaaqay. Si dhakhso ah ayay u milaan marka ay biyaha soo gaadhaan si ay u sameeyaan viscosity-ka loo baahan yahay.
4. Ku dar cellulose si tartiib ah oo siman heerkulka qolka, walaaq si joogto ah ilaa xal cad uu sameeyo.
Waa maxay arrimaha saameeya haynta biyaha ee hydroxypropyl methylcellulose?
Haysashada biyaha ee hydroxypropyl methylcellulose alaabta HPMC lafteeda waxaa badanaa saameeya arrimaha soo socda:
1. Homogeneity of cellulose ether HPMC
Methoxy-ka HPMC iyo kooxaha hydroxypropoxy ee sida isku mid ah uga fal-celiyay ayaa si siman loo qaybiyay waxayna leeyihiin haynta biyaha sare.
2. Cellulose ether HPMC heerkulka jelka kulaylka
Heerkulka sare ee jel conductive kulaylka, sare heerka haynta biyaha; Taa beddelkeeda, hoos u dhaca heerka haynta biyaha.
3. Viscosity of cellulose ether HPMC
Marka viscosity ee HPMC uu kordho, heerka haynta biyaha sidoo kale wuu kordhiyaa; marka viscosity gaaro heer gaar ah, kororka heerka haynta biyuhu waxay u egtahay mid dabacsan.
Celcelluse ether HPMC qaddarka dheeraadka ah
Inta badan xaddiga cellulose ether HPMC ee lagu daray, sare u kaca heerka haynta biyaha iyo si fiican u saamayn haysashada biyaha.
Inta u dhaxaysa 0.25-0.6%, heerka haynta biyaha ayaa si degdeg ah u kordheysa marka qadarka dheeriga ah uu kordho; marka lacagta dheeriga ah ay sii korodho, korodhka korodhka xadiga biyaha ayaa hoos u dhacaya.
Waqtiga boostada: Feb-06-2024