Maxay yihiin arrimo saamayn doona viscosity hydroxypropyl methylcellulose?

Codsiga hoobiyeyaasha qoyan, hydroxypropyl methylcellulose waxay leedahay sifooyin dhumuc wanaagsan, waxay si weyn u kordhin kartaa awoodda isku xidhka ee u dhexeeya hoobiye qoyan iyo lakabka saldhigga, iyo sidoo kale hagaajin kartaa waxqabadka anti-sag ee hoobiye, sidaas darteed waxaa si ballaaran loo isticmaalaa in lagu dhajiyo Mortar, dibadda habka dahaarka gidaarka iyo leben isku xidhka hoobiye.

Saamaynta dhumucdeeda ee ether cellulose, waxay sidoo kale kordhin kartaa isku-dhafka iyo awoodda ka-hortagga kala-firdhinta walxaha cusub ee sibidhka ku salaysan, waxayna sidoo kale ka hortagi kartaa dhibaatooyinka delamination, kala-soocidda iyo dhiig-baxa hoobiye iyo shubka. Waxa lagu dabaqi karaa shubka lagu xoojiyay Fiber-ka, shubka biyaha hoostooda iyo shamiitada is-isku-duubnida.

Hydroxypropyl methylcellulose waxay kordhin kartaa waxqabadka viscous ee walxaha sibidhka ku salaysan. Waxqabadkani wuxuu inta badan ka yimaadaa viscosity of cellulose ether solution. Guud ahaan, tusaha nambarada ee viscosity waxaa loo isticmaalaa in lagu xukumo viscosity of cellulose ether xal, halka cellulose The viscosity ee ether inta badan inta badan waxaa loola jeedaa diiradda gaar ah ee xal ether cellulose, sida caadiga ah 2%, heerkulka la cayimay, sida 20 digrii iyo qiyaas wareeg ah, iyadoo la isticmaalayo qalab cabbireed cayiman, sida viscometer wareeg ah. Qiimaha viscosity.

Viscosity waa mid ka mid ah halbeegyada muhiimka ah ee lagu qiimeeyo waxqabadka ether cellulose. Marka uu sareeyo viscosity ee xalka hydroxypropyl methylcellulose, ayaa ka sii wanagsan hufnaanta walxaha sibidhka ku salaysan, iyo sida ay u wanagsan tahay waxqabadka adhesion ee substrate-ka. Isla mar ahaantaana, waxa ay leedahay Awoodda ka-hortagga-soo-saarka iyo awoodda ka-hortagga kala-firdhinta ayaa ka xoog badan, laakiin haddii uu viscosity-kiisu aad u sarreeyo, waxay saameyn doontaa waxqabadka socodka iyo shaqeynta alaabta sibidhka ku salaysan.

Maxay yihiin arrimo saamayn doona viscosity hydroxypropyl methylcellulose? Inta badan waxay ku xiran tahay sababaha soo socda.

1. Heerka sare ee polymerization of cellulose ether of hydroxypropyl methylcellulose, weynaan miisaankeeda kelli, taasoo keentay in viscosity sare ee ay xal aqueous.

2. Haddii qadarka ama xoojinta etherka cellulose uu sarreeyo, viscosity ee xalkeeda aqueous ayaa noqon doona mid sarreeya. Si kastaba ha noqotee, waa in taxaddar la sameeyaa si loo doorto qaddar ku habboon ether-ka cellulose marka la isticmaalayo, inta badan si looga fogaado xad-dhaafka xad-dhaafka ah ee ether-ka cellulose. Waxay saameyn doontaa waxqabadka hoobiye iyo shubka.

3. Sida dareerayaasha intooda badan, viscosity of cellulose ether xal waxay hoos u dhigi doontaa korodhka heerkulka, iyo xoojinta sare ee etherka cellulose, hoos u dhigista heerkulka. Saamaynta wayn.

4. Xalka ether cellulose sida caadiga ah waa pseudoplastic, kaas oo leh sifooyinka khafiifinta xiirta. Markasta oo uu bato heerka dhogorta inta lagu jiro tijaabada, waa yaraanta viscosity.

Isku-duubnida hoobiyeyaasha ayaa hoos u dhici doona sababtoo ah ficilka xoogga dibadda, kaas oo sidoo kale ku habboon in la xoqo dhismaha hoobiye, taas oo keeneysa isku-duubni wanaagsan iyo karti shaqo oo isku mid ah. Si kastaba ha noqotee, haddii xalka ether-ka cellulose uu leeyahay feejignaan sare Marka maangalku hooseeyo oo uu yar yahay, waxay muujin doontaa sifooyinka dheecaanka Newtonian. Marka fiirsigu kordho, xalku si tartiib tartiib ah ayuu u muujin doonaa sifooyinka dareeraha pseudoplastic, iyo haddii feejignaantu ka sarreyso, pseudoplasticity waxay noqon doontaa mid cad.