Diyaarinta ethers cellulose

Diyaarintaethers cellulosewaxay ku lug leedahay in si kiimiko ah wax looga beddelo cellulose polymer-ka dabiiciga ah iyada oo loo marayo falcelinta etherification. Nidaamkani wuxuu soo bandhigayaa kooxaha etherka ee kooxaha hydroxyl ee silsiladda polymer cellulose, taasoo horseedaysa samaynta ethers cellulose leh sifooyin gaar ah. Ether-yada cellulose-ka ugu caansan waxaa ka mid ah Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), iyo Ethyl Cellulose (EC). Halkan waxaa ah dulmar guud oo ku saabsan habka diyaarinta:

1. Isha Cellulose:

• Nidaamku wuxuu ku bilaabmaa soo saarista cellulose, kaas oo sida caadiga ah laga helo saxarka alwaax ama suufka. Doorashada isha cellulose waxay saameyn kartaa sifooyinka alaabta etherka cellulose ugu dambeeya.

2. Duubista:

• Cellulose-ku waxa la mariyaa habab jeexjeexin si ay u jajabiso fiilooyinka una noqdaan qaab la maarayn karo. Tani waxa ay ku lug yeelan kartaa habab makaanik ama kiimiko.

3. Nadiifinta:

• Cellulose-ku waa la nadiifiyaa si looga saaro wasakhda, lignin, iyo qaybaha kale ee aan unugyadu ahayn. Tallaabadan nadiifinta ayaa muhiim u ah helitaanka walxo cellulose oo tayo sare leh.

4. Falcelinta Etherification:

• Cellulose-ka la sifeeyay waxay maraysaa etherification, halkaas oo kooxaha etherka lagu soo bandhigo kooxaha hydroxyl ee silsiladda polymer cellulose. Doorashada wakiilka etherifying iyo xaaladaha falcelinta waxay kuxirantahay badeecada etherka cellulose ee la rabo.
• Waxyaalaha caadiga ah ee etherifying ka mid ah ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, iyo kuwa kale.

5. Xakamaynta cabbirrada falcelinta:

• Dareen-celinta etherification si taxadar leh ayaa loo xakameeyaa marka la eego heerkulka, cadaadiska, iyo pH si loo gaaro heerka la rabo ee beddelka (DS) lagana fogaado falcelinta dhinaca.
• Xaaladaha alkaline badanaa waa la shaqeeyaa, pH ee isku darka falcelinta si dhow ayaa loola socdaa.

6. Dhexdhexaadinta iyo Dhaqidda:

• Dareen-celinta etherification ka dib, badeecada ayaa inta badan la dhex-dhexaadiyaa si meesha looga saaro reagents-ka xad-dhaafka ah ama alaabada. Talaabadaan waxaa raacda dhaqid si fiican si loo baabi'iyo haraaga kiimikooyinka iyo wasakhda.

7. Qalajinta:

• Cellulose-ka la nadiifiyey oo la etherified waa la qalajiyey si loo helo badeecada ether-ka cellulose-ka ugu dambeeya ee budada ama qaabka granular.

8. Xakamaynta tayada:

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

9. Samaynta iyo Baakaynta:

• Eter-ka cellulose ayaa markaa loo qaabeeyey darajooyin kala duwan si loo buuxiyo shuruudaha gaarka ah ee codsiyada kala duwan. Alaabooyinka ugu dambeeya waxaa loo baakadeeyay qaybinta.

Diyaarinta ethers cellulose waa hannaan kiimiko oo adag oo u baahan in si taxadar leh loo xakameeyo xaaladaha falcelinta si loo gaaro sifooyinka la rabo. Kala-duwanaanta ethers-ka cellulose waxay u oggolaanaysaa isticmaalkooda codsiyo kala duwan oo kala duwan oo warshado ah, oo ay ku jiraan dawooyinka, cuntada, dhismaha, dahaarka, iyo in ka badan.