Focus on Cellulose ethers

Waa maxay xasilloonida pH ee hydroxyethylcellulose?

Waa maxay xasilloonida pH ee hydroxyethylcellulose?

Hydroxyethylcellulose (HEC) waa polymer-ka biyaha ku milma taas oo si weyn loogu isticmaalo codsiyo kala duwan sida xabag, dahaarka, iyo alaabta daryeelka shakhsi ahaaneed. Xasiloonida pH ee HEC waxay ku xidhan tahay dhawr arrimood, oo ay ku jiraan darajada gaarka ah ee HEC, baaxadda pH ee codsiga, iyo muddada gaadhista deegaanka pH.

HEC caadi ahaan waxay ku xasiloon tahay inta u dhaxaysa pH 2-12, taas oo daboolaysa xaalado kala duwan oo aysiidh ilaa alkaline ah. Si kastaba ha ahaatee, soo-gaadhista dheeraadka ah ee xaaladaha pH ee aadka u daran waxay keeni kartaa HEC inay hoos u dhigto, taasoo keentay inay lumiso dhumucdeeda iyo dhismaheeda.

Marka la eego qiimaha pH ee acidic, oo ka hooseeya pH ee 2, HEC waxay mari kartaa hydrolysis, taasoo keenta hoos u dhaca miisaanka kelli iyo hoos u dhigista viscosity. Marka la eego qiimaha pH ee aadka u sarreeya, ee ka sarreeya pH 12, HEC waxay mari kartaa hydrolysis alkaline, taasoo horseedaysa luminta alaabteeda dhumucda iyo xasilinta.

Xasiloonida pH ee HEC waxay sidoo kale saameyn kartaa joogitaanka kiimikooyinka kale ee samaynta, sida cusbada ama surfactants, taas oo saameyn karta pH iyo xoogga ionic ee xalka. Xaaladaha qaarkood, ku darista aashitada ama saldhigga ayaa laga yaabaa inay lagama maarmaan noqoto si loo hagaajiyo pH loona ilaaliyo xasilloonida xalka HEC.

Guud ahaan, HEC guud ahaan waa mid degan gudaha pH ballaaran, laakiin waxaa muhiim ah in la tixgeliyo codsiga gaarka ah iyo shuruudaha qaabeynta si loo hubiyo in HEC ay sii haysato hantideeda la rabo waqti ka dib.


Waqtiga boostada: Mar-08-2023
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