Tekanyo ea Boikemisetso ba ho Fetola Mokhoa oa Sodium Carboxymethyl Cellulose

Ho fumana tekanyo ea ho fetola (DS) ea sodium carboxymethyl cellulose (CMC) ho bohlokoa bakeng sa taolo ea boleng le ho netefatsa ho tsitsa ha thepa le ts'ebetso ea eona. Ho ka sebelisoa mekhoa e mengata ho tseba hore na DS ea CMC ke efe, 'me mekhoa ea "titration" le "spectroscopic" ke eona e sebelisoang haholo. Mona ke tlhaloso e qaqileng ea mokhoa oa titration bakeng sa ho khetholla DS ea sodium CMC:

1. Molao-motheo:

• Mokhoa oa titration o itšetlehile ka karabelo pakeng tsa lihlopha tsa carboxymethyl ho CMC le tharollo e tloaelehileng ea motheo o matla, hangata sodium hydroxide (NaOH), tlas'a maemo a laoloang.
• Lihlopha tsa Carboxymethyl (-CH2-COOH) ho CMC li itšoara ka NaOH ho etsa sodium carboxylate (-CH2-COONA) le metsi. Boemo ba karabelo ena bo lekana le palo ea lihlopha tsa carboxymethyl tse teng ka har'a molek'hule ea CMC.

2. Lisebelisoa le Lisebelisoa:

• Sodium hydroxide (NaOH) tharollo e tloaelehileng ea mahloriso a tsebahalang.
• Mohlala oa CMC.
• Letšoao la acid-base (mohlala, phenolphthalein).
• Borette.
• Botlolo ea conical.
• Metsi a hloekisitsoeng.
• Sehlahisoa kapa matla a khoheli.
• Ho leka-lekanya ho leka-lekanya.
• pH metara kapa pampiri e bontšang.

3. Mokhoa:

1. Tokiso ea Mohlala:
   • Beha palo e itseng ea sampole ea CMC ka nepo u sebelisa tekanyo ea tlhahlobo.
   • Qhala sampole ea CMC ka molumo o tsebahalang oa metsi a hloekisitsoeng ho lokisa tharollo ea mahloriso a tsebahalang. Etsa bonnete ba ho kopanya ka botlalo ho fumana tharollo e tšoanang.
2. Titration:
   • Pipette molumo o lekantsoeng oa tharollo ea CMC ka har'a botlolo ea conical.
   • Kenya marotholi a seng makae a sesupo sa acid-base (mohlala, phenolphthalein) ho botlolo. Letšoao le lokela ho fetola 'mala qetellong ea titration, hangata ho pota pH 8.3-10.
   • Titrate tharollo ea CMC ka tharollo e tloaelehileng ea NaOH e tsoang ho burette ka ho hlohlelletsa kamehla. Ngola molumo oa tharollo ea NaOH e kentsoeng.
   • Tsoela pele ho retelehela ho fihlela ntlha ea ho qetela e fihletsoe, e bontšitsoeng ke phetoho e tsitsitseng ea 'mala oa letšoao.
3. Palo:
   • Bala DS ea CMC u sebelisa foromo e latelang:
   $��=�\times �\times NaOH�CMC$

   DS=mCMCV×N×MNaOH

   Moo:

   • $��$

     DS = Degree ea Phapanyetsano.

   • $�$

     V = Bolumo ba tharollo ea NaOH e sebelisitsoeng (ka lilithara).

   • $�$

     N = Tloaelo ea tharollo ea NaOH.

   • $�NaOH$

     MNaOH = Boima ba molek'hule ea NaOH (g/mol).

   • $�CMC$

     mCMC = Bongata ba sampole ea CMC e sebelisitsoeng (ka ligrama).

4. Tlhaloso:
   • DS e baloang e emela palo e tloaelehileng ea lihlopha tsa carboxymethyl ka yuniti ea tsoekere ka molek'hule ea CMC.
   • Pheta tlhahlobo ka makhetlo a mangata 'me u bale karolelano ea DS ho netefatsa ho nepahala le ho tšepahala ha liphetho.

4. Maikutlo:

• Etsa bonnete ba hore lisebelisoa li lekanngoa hantle le maemo a li-reagents bakeng sa liphetho tse nepahetseng.
• Tšoara tharollo ea NaOH ka hloko kaha e baka 'me e ka baka cheso.
• Etsa titration tlas'a maemo a laoloang ho fokotsa liphoso le ho fetoha.
• Netefatsa mokhoa o sebelisa litekanyetso tsa litšupiso kapa tlhahlobo ea papiso le mekhoa e meng e netefalitsoeng.

Ka ho latela mokhoa ona oa titration, tekanyo ea substitution ea sodium carboxymethyl cellulose (CMC) e ka khethoa ka nepo, e fana ka tlhahisoleseling ea bohlokoa bakeng sa taolo ea boleng le merero ea ho theha liindasteri tse fapaneng.