Ether Cellulose waa erey guud oo taxane ah oo badeecado ah oo ay soo saarto falcelinta cellulose alkali iyo wakiilka etherifying ee xaaladaha qaarkood.Alkali cellulose waxaa lagu bedelay wakiilada etherifying kala duwan si ay u helaan kala duwanethers cellulose.Sida laga soo xigtay sifooyinka ionization ee beddelka, ethers cellulose waxaa loo qaybin karaa laba qaybood: ionic (sida carboxymethyl cellulose) iyo non-ionic (sida methyl cellulose).Marka loo eego nooca beddelka, etherka cellulose waxa loo qaybin karaa monoether (sida methyl cellulose) iyo ether isku dhafan (sida hydroxypropyl methyl cellulose).Marka loo eego milanka kala duwan, waxa loo qaybin karaa biyo-milmi kara (sida hydroxyethyl cellulose) iyo dareeraha organic-kaliya (sida ethyl cellulose), iwm. loo qaybiyay nooca degdega ah iyo nooca daah ee dusha lagu daweeyay.
Ka dib markii ether cellulose ee hoobiye lagu kala diro biyaha, qaybinta waxtarka iyo isku midka ah ee walxaha sibidhka ee nidaamka ayaa la hubiyaa sababtoo ah dhaqdhaqaaqa dusha sare, iyo ether cellulose, sida kolloid ilaalin ah, "duubo" qaybaha adag iyo daboolka iyaga oo dusha sare ah.Samee filim saliid ah, samee nidaamka hoobiye si aad u xasilan, iyo sidoo kale hagaajinta dareeraha hoobiye inta lagu jiro habka isku dhafka iyo jilicsanaanta dhismaha.
Iyada oo ay ugu wacan tahay qaab-dhismeedkeeda molecular, xalka ether-ka cellulose wuxuu ka dhigayaa biyaha ku jira hoobiye aan si fudud loo lumin, oo si tartiib tartiib ah u sii daaya muddo dheer, taas oo siinaysa hoobiye biyo-hayn wanaagsan iyo karti shaqo.
Madaafiicda sibidhka dhulka ee is-mida, oo leh eter-ka hydroxypropyl methylcellulose viscosity hooseeya.Maadaama dhulka oo dhan uu si dabiici ah u siman yahay faragelin yar oo ay sameeyeen shaqaalaha dhismuhu, marka la barbar dhigo habraaca fududaynta gacanta ee hore, fidsanaanta iyo xawaaraha dhismaha ayaa si weyn loo hagaajiyay.Waqtiga isku-dhafka qallalan ee is-beddelka ah ayaa ka faa'iideysanaya haynta biyaha wanaagsan ee hydroxypropyl methylcellulose.Maaddaama is-heeraynta ay u baahan tahay in hoobiye si siman loo kiciyay uu si toos ah dhulka ugu simi karo, walxaha biyuhu waa kuwo aad u weyn.Ka dib marka lagu daro hpmc, waxay xakameyn doontaa dhulka Biyaha haynta ee dusha sare ma aha mid cad, taas oo ka dhigaysa xoogga dusha sare ka dib qalajinta, iyo yaraanta waa yar tahay, taas oo yaraynaysa dildilaaca.Ku darida HPMC waxay sidoo kale bixisaa viscosity, kaas oo loo isticmaali karo gargaar ka-hortagga sedimentation, kor u qaadida dareeraha iyo bamgareynta, iyo hagaajinta waxtarka jeexitaanka dhulka.
Eter cellulose wanaagsan wuxuu leeyahay xaalad muuqaal ah oo qalafsan iyo cufnaanta cufnaanta yar;saafiga HPMC waxa uu leeyahay cadaan wanaagsan, alaabta ceeriin ee loo isticmaalo wax soo saarku waa saafi, falcelintu waa mid dhamaystiran oo aan wasakh ahayn, xalinta biyaha waa caddahay, gudbinta iftiinka ayaa sareysa, mana jiraan ammonia, istaarij iyo aalkolo.Dhadhanka, mikroskoob ka hooseeya ama muraayadda weynaynta.
Waqtiga post: Dec-06-2022