Habka Go'aaminta Darajada Beddelka ee Sodium Carboxymethyl Cellulose

Go'aaminta heerka beddelka (DS) ee sodium carboxymethyl cellulose (CMC) waxay muhiim u tahay xakamaynta tayada iyo hubinta joogtaynta hantideeda iyo waxqabadkeeda. Dhowr habab ayaa loo isticmaali karaa si loo go'aamiyo DS ee CMC, iyadoo titration iyo farsamooyinka spectroscopic yihiin kuwa ugu badan ee la isticmaalo. Halkan waxaa ah sharaxaad faahfaahsan oo ku saabsan habka titration ee go'aaminta DS ee sodium CMC:

1. Mabda'a:

• Habka titration-ku wuxuu ku tiirsan yahay falcelinta u dhaxaysa kooxaha karboxymethyl ee CMC iyo xalalka caadiga ah ee saldhigga xooggan, sida caadiga ah sodium hydroxide (NaOH), ee xaaladaha la xakameeyey.
• Kooxaha Carboxymethyl (-CH2-COOH) ee CMC waxay la falgalaan NaOH si ay u sameeyaan sodium carboxylate (-CH2-COONa) iyo biyo. Baaxadda falcelintani waxay u dhigantaa tirada kooxaha karboxymethyl ee ku jira molecule CMC.

2. Reagents iyo Qalab:

• Sodium hydroxide (NaOH) xalka caadiga ah ee feejignaanta la yaqaan.
• Muunada CMC.
• Tilmaamaha Acid-saldhigga (tusaale, phenolphthalein).
• Burette.
• Qalab kolay ah.
• Biyo nadiif ah.
• Kiciya ama kicinta birta.
• Isku dheelitirnaanta falanqaynta.
• mitirka pH ama warqad tilmaame.

3. Habka:

1. Tusaalaha Diyaarinta:
   • Si sax ah u miisaamo cadad cayiman oo muunad CMC ah adigoo isticmaalaya dheelitirnaan lafo-gur.
   • Ku mil muunada CMC ee mugga la og yahay ee biyaha la miiray si aad u diyaarisid xal u fiirsasho la yaqaan. Hubi isku darka dhamaystiran si aad u hesho xal isku mid ah.
2. Titration:
   • Pipette mugga la cabbiray ee xalka CMC oo la galiyay weel koone ah.
   • Ku dar dhawr dhibcood oo ah tilmaame-saldhigga aashitada (tusaale, phenolphthalein) weelka. Tilmaamuhu waa inuu beddelaa midabka barta ugu dambeysa ee titration, sida caadiga ah agagaarka pH 8.3-10.
   • Titrate xalka CMC oo leh xalka caadiga ah ee NaOH ka burette oo leh walaaq joogto ah. Diiwaangeli mugga xalka NaOH ee lagu daray.
   • Sii wad titration-ka ilaa barta ugu dambeysa laga gaarayo, oo uu tilmaamayo isbeddelka midabka joogtada ah ee tusaha.
3. Xisaabinta:
   • Xisaabi DS ee CMC adoo isticmaalaya qaacidada soo socota:
   $��=�\times �\times �NaOH�CMC$

   DS=mCMCV×N×MNaOH

   Halkee:

   • $��$

     DS = Derejada Beddelka.

   • $�$

     V = Mugga NaOH ee la isticmaalay (litir ahaan).

   • $�$

     N = Caadiga ah ee xalka NaOH.

   • $�NaOH$

     MNaOH= MNaOH = Miisaanka unugga ee NaOH (g/mol).

   • $�CMC$

     mCMC = Tirada muunada CMC ee la isticmaalay (gram).

4. Fasiraadda:
   • Xisaabinta DS waxay u taagan tahay celceliska tirada kooxaha karboksymethyl unug gulukoos ee molecule CMC.
   • Ku celi falanqaynta marar badan oo xisaabi celceliska DS si aad u hubiso saxnaanta iyo isku halaynta natiijooyinka.

4. Tixgelin:

• Hubi qalabaynta saxda ah iyo habaynta reagents si loo helo natiijooyin sax ah.
• Si taxadar leh ula tacaal xalka NaOH maadaama uu yahay caustic oo keeni kara gubasho.
• Ku samee titration hoos xaaladaha la xakameeyey si loo yareeyo khaladaadka iyo kala duwanaanshiyaha.
• Xaqiiji habka adigoo isticmaalaya heerarka tixraaca ama falanqaynta isbarbardhigga hababka kale ee la ansaxiyay.

Iyadoo la raacayo habkan titration, heerka beddelka sodium carboxymethyl cellulose (CMC) ayaa si sax ah loo go'aamin karaa, iyadoo la siinayo macluumaad qiimo leh oo loogu talagalay ilaalinta tayada iyo ujeedooyinka qaabeynta ee warshadaha kala duwan.