Ethers Cellulose waa nooc kala duwan oo xeryahooda ka soo jeeda cellulose, polymer-ka dabiiciga ah ee laga helo gidaarada unugyada dhirta. Waxaa si weyn loogu isticmaalaa warshado kala duwan iyadoo ay ugu wacan tahay sifooyinkooda gaarka ah, oo ay ku jiraan milanka kala duwan ee dareerayaasha. Fahamka habdhaqanka milanka ethers cellulose ayaa muhiim u ah codsiyadooda daawooyinka, cuntada, dhismaha, iyo qaybaha kale.
Ethers-ka Cellulose waxaa sida caadiga ah soo saara iyadoo kiimiko ahaan wax ka beddelaya cellulose iyada oo loo marayo falcelinta etherification. Noocyada caadiga ah ee ethers cellulose waxaa ka mid ah methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), iyo carboxymethyl cellulose (CMC). Nooc kastaa wuxuu muujiyaa sifooyin kala duwanaansho oo ku salaysan qaab dhismeedka kiimikada iyo heerka beddelka.
Solubility ethers cellulose waxaa saameeya arrimo ay ka mid yihiin heerka polymerization, heerka beddelka, miisaanka kelli, iyo dabeecadda kooxaha beddelka ah. Guud ahaan, ether-ka cellulose-ka ee leh heerarka hoose ee beddelka iyo miisaanka kelliyada sare waa kuwo aan milmi lahayn marka la barbar dhigo kuwa leh heerarka sare ee beddelka iyo miisaanka kelliga hoose.
Mid ka mid ah sifooyinka ugu muhiimsan ee ethers cellulose waa awoodda ay u leeyihiin inay ku milaan noocyo kala duwan oo dareere ah, oo ay ku jiraan biyaha, dareerayaasha organic, iyo dareeraha polar iyo kuwa aan polarka ahayn qaarkood. Solubitaanka biyuhu waa sifo muhiim ah oo badan oo ethers cellulose ah waxayna si gaar ah muhiim ugu tahay codsiyada daawooyinka, cuntada, iyo alaabta daryeelka shakhsi ahaaneed.
Eter-yada cellulose-ka-biyo-ku-milmi kara sida HEC, HPC, iyo CMC waxay sameeyaan xalal cad, oo viscous ah marka lagu kala firdhiyo biyaha. Xalalkani waxay muujinayaan habdhaqanka pseudoplastic, taasoo la micno ah in viscositykoodu hoos u dhaco cadaadiska xiirid, taas oo ka dhigaysa inay ku habboon yihiin isticmaalka dhumucyada, xasiliyeyaasha, iyo walxaha samaynta filimada ee qaababka cuntada iyo daawooyinka.
Solubility ethers cellulose ee dareerayaasha organic ku xiran tahay qaab-dhismeedka kiimikada iyo polarity ee dareeraha. Tusaale ahaan, MC iyo EC waxay ku milmeen noocyo kala duwan oo dareere dabiici ah, oo ay ku jiraan acetone, ethanol, iyo chloroform, sababtoo ah beddelkooda heerka hooseeya iyo dabeecadda hydrophobic. Guryahani waxay ka dhigaan kuwo qiimo leh codsiyada sida dahaarka, xabagta, iyo hababka gudbinta daroogada ee la xakameeyey.
HEC iyo HPC, oo ka kooban hydroxyethyl iyo kooxaha hydroxypropyl, siday u kala horreeyaan, waxay muujinayaan milanka la xoojiyey ee dareerayaasha organic polar sida alkolada iyo glycols. Ether-yadan cellulose-ka ah waxaa inta badan loo isticmaalaa sidii dhumucdooda iyo hagaajinta rheology ee alaabta qurxinta iyo daryeelka shakhsi ahaaneed, iyo sidoo kale rinjiyada biyaha ku salaysan iyo dahaarka.
CMC waxay ku milmi kartaa biyaha iyo qaar ka mid ah dareerayaasha polar sababtoo ah beddelaadkeeda karboxymethyl, taas oo siisa milmi-biyoodka silsiladda polymer. Waxaa si weyn loogu shaqeeyaa sida wakiilka dhumuc, xasiliye, iyo emulsifier ee alaabta cuntada, daawooyinka, iyo codsiyada warshadaha.
Solubility ethers cellulose sidoo kale waxaa saameyn kara arrimo dibadda ah sida heerkulka, pH, iyo joogitaanka milix ama daro kale. Tusaale ahaan, ku darida korontolaytka sida sodium chloride ama kalsiyum chloride waxay yarayn kartaa milanka ethers-ka cellulose-ka ee biyaha-milmi kara iyadoo kor u qaadeysa isku-darka polymer ama roobabka.
ethers cellulose waxay soo bandhigaan sifooyin milmayn badan oo ka dhigaya waxyaabo qiimo leh oo lagu daro warshado kala duwan. Awooddooda ay ku milmaan biyaha, dareerayaasha dabiiciga ah, iyo dareeraha dabaysha ayaa awood u siinaya codsiyo kala duwan oo u dhexeeya qaababka daawooyinka ilaa qalabka dhismaha. Fahamka habdhaqanka milanka ethers cellulose waxay muhiim u tahay wanaajinta waxqabadkooda iyo shaqeyntooda alaabooyin iyo habab kala duwan.
Waqtiga boostada: Abriil-24-2024