Habka loo soo saaro ether methyl cellulose

Soo saaristamethyl cellulose etherku lug leh wax ka beddelka kiimikaad ee cellulose iyada oo loo marayo falcelinta etherification. Methyl cellulose (MC) waa eter cellulose biyo-milmi leh oo si ballaaran looga isticmaalo warshado kala duwan. Halkan waxaa ah dulmar guud oo ku saabsan habka loo sameeyo methyl cellulose ether:

1. Xulashada isha Cellulose:

• Nidaamku wuxuu ka bilaabmaa xulashada isha cellulose, oo badanaa laga helo saxarka alwaax ama suufka. Ilaha cellulose waxaa lagu doortaa iyadoo lagu salaynayo sifooyinka la rabo ee sheyga methyl cellulose ugu dambeeya.

2. Duubista:

• Ilaha cellulose ee la xushay waxa la mariyaa pulping, habka u jejebiya fiilooyinka una noqda qaab la maarayn karo. Duubista waxaa lagu gaari karaa habab makaanik ama kiimiko.

3. Firfircoonida Cellulose:

• Cellulose-ka la miiray ayaa markaa la dhaqaajiyaa iyadoo lagu daweynayo xal alkaline ah. Talaabadani waxay rabta inay bararto fiilooyinka cellulose, taasoo ka dhigaysa inay noqdaan kuwo firfircoon inta lagu jiro falcelinta eterification ee xiga.

4. Falcelinta Etherification:

• Cellulose-ka firfircooni wuxuu maraa etherification, halkaas oo kooxaha ether, kiiskan, kooxaha methyl, lagu soo bandhigo kooxaha hydroxyl ee silsiladda polymer cellulose.
• Dareen-celinta etherification waxay ku lug leedahay isticmaalka walxaha methylating sida sodium hydroxide iyo methyl chloride ama dimethyl sulfate. Xaaladaha falcelinta, oo ay ku jiraan heerkulka, cadaadiska, iyo wakhtiga falcelinta, ayaa si taxadar leh loo xakameeyaa si loo gaaro heerka la rabo ee beddelka (DS).

5. Dhexdhexaadinta iyo Dhaqidda:

• Ka dib falcelinta etherification, alaabtu waa dhexdhexaad si meesha looga saaro alkali dheeraadka ah. Tallaabooyinka dhaqidda xiga ayaa la sameeyaa si loo baabi'iyo kiimikooyinka haraaga ah iyo wasakhda.

6. Qalajinta:

• cellulose-ka la safeeyey iyo methylated waa la qalajiyey si loo helo methyl cellulose ether-ka ugu dambeeya ee qaabka budada ama granules.

7. Xakamaynta tayada:

• Farsamooyin kala duwan oo falanqayn ah, oo ay ku jiraan nukliyeerka magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, iyo chromatography, ayaa loo shaqeeyaa si loo xakameeyo tayada. Heerka beddelka (DS) waa halbeeg muhiim ah oo lala socdo inta lagu jiro wax soo saarka.

8. Samaynta iyo Baakaynta:

• Ether-ka methyl cellulose waxaa loo qaabeeyey darajooyin kala duwan si loo buuxiyo shuruudaha gaarka ah ee codsiyada kala duwan. Darajooyinka kala duwan ayaa laga yaabaa inay ku kala duwanaadaan viscosity, cabbirka walxaha, iyo sifooyinka kale.
• Alaabooyinka ugu dambeeya waxaa loo baakadeeyay qaybinta.

Waxaa muhiim ah in la ogaado in xaaladaha gaarka ah iyo reage-yaasha loo isticmaalo falcelinta etherification ay kala duwanaan karaan iyadoo lagu saleynayo hababka lahaanshaha ee soo saaraha iyo sifooyinka la doonayo ee alaabta methyl cellulose. Methyl cellulose waxay ka heshaa codsiyada warshadaha cuntada, dawooyinka, dhismaha, iyo qaybaha kale sababtoo ah awoodeeda biyaha-millan iyo samaynta filimada.