Waa maxay hydroxyethyl cellulose?

Waa maxay hydroxyethyl cellulose?

Hydroxyethyl cellulose (HEC), jaale cad ama cirro leh, aan ur lahayn, fibros aan sun ahayn ama adag budo ah, oo lagu diyaariyey etherification of cellulose alkaline iyo ethylene oxide (ama chlorohydrin), oo ka tirsan genus Nonionic soluble cellulose ethers. Sababtoo ah HEC waxay leedahay sifooyin wanaagsan sida dhumucda, joojinta, kala firdhinta, emulsifying, bonding, filim samaynta, ilaalinta qoyaanka iyo bixinta koloidyada ilaalinta, ayaa si weyn loogu isticmaalay sahaminta saliidda, dahaarka, dhismaha, daawada iyo cuntada, dunta, waraaqaha iyo polymers. Polymerization iyo qaybaha kale.

Hydroxyethyl cellulose waxaa si weyn loogu isticmaalaa warshadaha daahan. Aynu eegno sida ay ugu shaqeyso dahaarka:

Maxaa dhacaya marka hydroxyethyl cellulose ay la kulmaan dahaarka biyaha ku salaysan?

Sida surfactant-aan-ionic ah, hydroxyethyl cellulose waxay leedahay sifooyinka soo socda marka lagu daro dhumuc, laalitaan, xidhidh, sabbaynaya, filim samaynta, kala firdhinta, haynta biyaha iyo bixinta kolloid ilaalinta:

HEC waxay ku milmi kartaa biyo kulul ama qabow, oo kuma soo da'in heerkulka sare ama karkarinta, taasoo ka dhigaysa inay leedahay noocyo kala duwan oo ah milanka iyo sifooyinka viscosity, iyo sidoo kale gelling aan kulaylka ahayn;

Awoodda xajinta biyaha waa laba jeer ka methyl cellulose, waxayna leedahay nidaaminta qulqulka wanaagsan;

Non-ionic lafteedu waxay la noolaan kartaa tiro balaadhan oo ah polymers kale oo biyo-milmi leh, surfactants, iyo cusbada, waana dhumuc weyn oo kolloidal ah oo ka kooban xalal elektrolyt ah oo xoog leh;

Marka la barbar dhigo methyl cellulose la aqoonsan yahay iyo hydroxypropyl methyl cellulose, awoodda kala firdhisoHECwaa tan ugu xun, laakiin awoodda kolloid ilaalinta ayaa ah tan ugu xooggan.

Maadaama dusha lagu daaweeyay hydroxyethyl cellulose ay tahay budo ama adag adag, Shandong Heda waxay ku xasuusinaysaa inaad fiiro gaar ah u yeelato qodobada soo socda markaad diyaarinayso khamriga hooyada hydroxyethyl cellulose:

(1) Kahor iyo ka dib marka lagu daro hydroxyethyl cellulose, waa in lagu hayaa walaaq ilaa inta xalku si buuxda u hufan yahay oo cad yahay.

(2) Waa in si tartiib ah loogu miiraa foostada isku dhafka ah, oo aan si toos ah ugu xidhin hydroxyethyl cellulose iyo hydroxyethyl cellulose gudaha foostada isku dhafka ah oo tiro badan ama qaab buro iyo kubbado ah.

(3) Heerkulka biyaha iyo qiimaha pH ee biyuhu waxay leeyihiin xidhiidh cad oo la xidhiidha milanka hydroxyethyl cellulose, markaa waa in fiiro gaar ah la siiyaa.

(4) Waligaa walxo alkaline ah ha ku darin isku darka ka hor inta aan budada hydroxyethyl cellulose lagu qooyay biyo. Kor u qaadista pH kaliya ka dib qoynta waxay kaa caawin doontaa in la milmo.

(5) Inta suurtogalka ah, horay ugu sii daa wakiilka antifungal.

(6) Marka la isticmaalayo hydroxyethyl cellulose-viscosity-sare, fiirsashada khamriga hooyadu waa inuusan ka badnaan 2.5-3% (miisaan ahaan), haddii kale khamriga hooyadu way adag tahay in la xakameeyo.