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PREPARED POTASSIUM SALT OF CARBOXYMETHYL PINE WOOD IN A MICROWAVE

PREPARED POTASSIUM SALT OF CARBOXYMETHYL PINE WOOD IN A MICROWAVE

Abstract

Для интенсификации процесса карбоксиметилирования древесины сосны без предварительного разделения на отдельные компоненты предложено использовать микроволновое излучение. С целью получения карбоксиметилированной древесины сосны в виде калиевой соли проведена обработка древесины сосны гидроксидом калия и монохлоруксусной кислотой в среде пропанола-2. Изучены состав и свойства полученных продуктов. Из карбоксиметилированной древесины сосны выделена карбоксиметилированная целлюлоза. Установлено, что увеличение мощности микроволнового излучения (от 210 до 700 Вт) и продолжительности первой и второй стадий процесса карбоксиметилирования (20–30 сек) приводит к повышению содержания карбоксиметильных групп (18,3–25,6%). Обнаружена аномально низкая растворимость калиевых солей карбоксиметилированной древесины сосны (10–18%) по сравнению с натриевыми солями при сравнимом содержании карбоксиметильных групп. Проведено исследование вязкости водных растворов карбоксиметилированной древесины сосны и карбоксиметилированной целлюлозы, выделенной из нее. Показано, что образцы, полученные при мощности микроволнового излучения 210 Вт, обладают аномальными кривыми 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.

Keywords

microwave radiation, карбоксиметилирование, potassium salt, древесина, калиевая соль, карбоксиметилцеллюлоза, carboxymethylcellulose, кривые течения, flow curves, carboxymethylation, микроволновое излучение, wood

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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