Diyaarinta Hydroxyethyl Cellulose

Hydroxyethyl Cellulose (HEC) waxaa sida caadiga ah lagu diyaariyaa habka wax ka beddelka kiimikaad ee loo yaqaan etherification, halkaas oo kooxaha hydroxyethyl lagu soo bandhigo laf dhabarta cellulose. Halkan waxaa ah dulmar guud oo ku saabsan habka diyaarinta:

1. Xulashada isha Cellulose:

• Cellulose, polymer-ka dabiiciga ah ee laga helo dhirta, waxay u adeegtaa sida alaabta bilawga ah ee isku dhafka HEC. Ilaha caadiga ah ee cellulose waxaa ka mid ah saxarka alwaax, suufka suufka ah, iyo alaabta dhirta kale ee fiber-ka ah.

2. Firfircoonida Cellulose:

• Isha cellulose ayaa marka hore la hawlgeliyay si ay u kordhiso firfircoonideeda iyo helitaankeeda falcelinta etherification ee xiga. Hababka firfircoonida waxaa ka mid noqon kara daawaynta alkaline ama bararka dareeraha ku habboon.

3. Falcelinta Etherification:

• Cellulose-ka firfircoon ayaa markaa lagu sammeeyaa falcelinta etherification oo leh ethylene oxide (EO) ama ethylene chlorohydrin (ECH) iyadoo ay joogaan kiciyayaal alkaline ah sida sodium hydroxide (NaOH) ama potassium hydroxide (KOH).

4. Horudhaca Kooxaha Hydroxyethyl:

• Inta lagu jiro falcelinta etherification, kooxaha hydroxyethyl (-CH2CH2OH) ee ka soo baxa molecule ethylene oxide ayaa lagu soo bandhigaa laf-dhabarka cellulose, beddelaya qaar ka mid ah kooxaha hydroxyl (-OH) ee ku jira molecule cellulose.

5. Xakamaynta Xaaladaha Falcelinta:

• Xaaladaha falcelinta, oo ay ku jiraan heerkulka, cadaadiska, wakhtiga falcelinta, iyo feejignaanta kicinta, ayaa si taxadar leh loo xakameeyaa si loo gaaro heerka la rabo ee beddelka (DS) ee kooxaha hydroxyethyl ee laf dhabarta cellulose.

6. Dhexdhexaadinta iyo Dhaqidda:

• Ka dib falcelinta etherification, badeecada HEC ee ka soo baxday waa dhexdhexaad si meesha looga saaro kicinta xad-dhaafka ah iyo hagaajinta pH. Ka dib waxaa lagu dhaqaa biyo si looga saaro alaabta ka soo baxda, reagen-yaasha aan la falgelin, iyo wasakhda.

7. Nadiifinta iyo Qalajinta:

• Alaabta HEC ee la sifeeyay ayaa sida caadiga ah la sifeeyaa, sentrifud, ama la qalajiyey si meesha looga saaro qoyaanka haraaga ah oo loo helo cabbirka walxaha iyo qaabka la rabo (budo ama granules). Tallaabooyinka nadiifinta dheeraadka ah ayaa la adeegsan karaa haddii loo baahdo.

8. Astaamaha iyo Xakamaynta Tayada:

• Badeecada ugu dambeysa ee HEC waxaa lagu gartaa iyadoo la adeegsanayo farsamooyin falanqayn oo kala duwan si loo qiimeeyo hantideeda, oo ay ku jiraan heerka beddelka, viscosity, qaybinta miisaanka kelli, iyo nadiifnimada. Tallaabooyinka xakamaynta tayada ayaa la fuliyay si loo hubiyo joogtaynta iyo u hoggaansanaanta tilmaamaha.

9. Baakadaha iyo Kaydinta:

• Alaabta HEC waxaa lagu baakadeeyay weelal ku haboon waxaana lagu keydiyaa xaaladaha la xakameeyey si looga hortago xaalufka loona ilaaliyo xasilloonideeda. Calaamadeynta saxda ah iyo dukumeentiyada ayaa la bixiyaa si loo fududeeyo maaraynta, kaydinta, iyo isticmaalka.

Marka la soo koobo, diyaarinta Hydroxyethyl Cellulose (HEC) waxay ku lug leedahay etherification of cellulose with ethylene oxide ama ethylene chlorohydrin hoos xaaladaha la xakameeyey, oo ay ku xigto dhexdhexaadinta, dhaqidda, nadiifinta, iyo qalajinta tallaabooyinka. Badeecada HEC ee ka soo baxday waa polymer-biyood-ku-milmi leh oo leh sifooyin gaar ah iyo codsiyo kala duwan oo warshado kala duwan ah.