Waa maxay farqiga u dhexeeyahydroxypropyl methylcellulose(HPMC) leh ama aan lahayn S?
1. HPMC waxa loo qaybiyaa nooca degdega ah iyo nooca kala firdhisanaanta degdega ah
Nooca degdega ah ee HPMC waxaa lagu dhejiyaa xarafka S. Inta lagu jiro habka wax soo saarka, glioxal waa in lagu daraa.
Nooca deg-degga ah ee HPMC kuma darto xarfo, sida "100000" waa "100000 viscosity fast dispersion type HPMC".
2. Iyadoo S ama la'aanteed, sifooyinku way kala duwan yihiin
Si degdeg ah u kala firdhiya HPMC waxay si degdeg ah ugu firdhisaa biyo qabow waxayna ku baaba'aysaa biyaha.Waqtigaan, dareeruhu ma laha viscosity, sababtoo ah HPMC kaliya ayaa lagu kala firdhiyey biyaha, mana jirto kala dirid dhab ah.Qiyaastii laba daqiiqo ka dib, viscosity ee dareeraha ayaa si tartiib tartiib ah u kordhaya, samaynta dareere dhegdheg ah oo hufan.Kolloid qaro weyn.
HPMC isla markiiba waxay si degdeg ah ugu firdhi kartaa biyaha kulul qiyaastii 70°C.Marka heerkulku hoos ugu 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, dahaarka iyo sahayda nadiifinta, xoqiddu way dhici doontaa oo lama isticmaali karo.
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 alaabta lagu dhaqo iyada oo aan wax khilaaf ah lahayn.
Habka kala dirida
1. Qaado cadadka biyaha kulul ee loo baahan yahay, ku rid weel oo kuleyl ka sarreeya 80 ° C, oo si tartiib ah ugu dar alaabtan si tartiib ah u walaaq.Cellulose-ku wuxuu ku dul sabeeyaa biyaha marka hore, laakiin si tartiib tartiib ah ayaa loo kala firdhiyaa si uu u sameeyo slurry labis ah.Ku qabooji xalka walaaqaya.
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, sii walaaq, oo qabooji isku dhafka ka dhashay.
3. Cellulose waxa ay leedahay tiro mesh ah oo aad u fiican, waxana ay u jirtaa sida qayb yar oo ka mid ah budada si isku mid ah loo walaaqay, waxana ay si degdeg ah u milaan marka ay la kulanto biyaha si ay u sameeyaan viscosity loo baahan yahay.
4. Ku dar cellulose si tartiib ah oo siman heerkulka qolka, oo sii walaaq inta lagu jiro habka wax ku-darka ilaa xal hufan laga 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. cellulose ether HPMC homogeneity
HPMC-ga si isku mid ah looga falceliyay waxa uu leeyahay qaybinta isku midka ah ee methoxy iyo kooxaha hydroxypropoxy iyo haynta biyaha sare.
2. Cellulose ether HPMC heerkulka jelka kulaylka
Heerkulka jelka kuleylka sarreeya, ayaa sarreeya heerka haynta biyaha;haddii kale, waa yaraanta heerka haynta biyaha.
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.
Celcelluse ether HPMC qaddarka dheeraadka ah
Marka ay sii weynaato qaddarka cellulose ether HPMC ee lagu daray, waa ay sii kordheysaa heerka haynta biyaha iyo sida ay u wanagsan tahay saameynta biyaha haynta.
Inta u dhaxaysa 0.25-0.6%, heerka haynta biyaha ayaa si degdeg ah u kordheysa iyadoo la kordhinayo qadarka dheeriga ah;marka lacagta dheeriga ah ay sii korodho, isbeddelka sii kordhaya ee xajinta biyaha ayaa noqda mid gaabis ah.
Waqtiga boostada: Oct-17-2022