PREPARED POTASSIUM SALT OF CARBOXYMETHYL PINE WOOD IN A MICROWAVE

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Маркин, Вадим Иванович ; Чепрасова, Марина Юрьевна ; Базарнова, Наталья Григорьевна ; Фролова, Евгения Олеговна (2013)
  • Publisher: Altai State University
  • Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material) (issn: 1029-5143, eissn: 1029-5151)
  • Related identifiers: doi: 10.14258/jcprm.1302069
  • Subject: microwave radiation, carboxymethylation, potassium salt, wood, carboxymethylcellulose, flow curves | микроволновое излучение, карбоксиметилирование, калиевая соль, древесина, карбоксиметилцеллюлоза, кривые течения

Microwave radiation to intensify the process of carboxymethylation of pine wood without prior separation of the individual components is proposed to use . Carboxymethylated pine wood in the form of the potassium salt obtained by treating the pine potassium hydroxide and monochloroacetic acid in 2-propanol . Composition and properties of the products were investigated . Carboxymethylcellulose isolated from carboxymethylated pine wood. Increasing the power of microwave radiation (210 to 700 W) and the duration of the first and second stages of the process of carboxymethylation (20-30 sec) increases the content of carboxymethyl groups (18,3-25,6 %). Abnormally low solubility of the potassium salts of carboxymethylated pine wood (10–18% ) compared to the sodium salt with a comparable content of carboxymethyl groups was detected. Study viscosity of aqueous solutions carboxymethylated pine and carboxymethylcellulose derived from it was performed. It is shown that the samples obtained at microwave power of 210 W have abnormal flow curves.
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