Background of the problem. The reactivity of cotton pulp during chemical processing is significantly lower compared to celluloses obtained from other cellulose-containing plants. Increasing the reactivity of cotton cellulose improves the quality of the products based on it, and also increases labor productivity.
The aim of this work is to study the possibility of replacing wood pulp imported from foreign countries with domestic cotton cellulose by increasing the reactivity of cotton cellulose for chemical processing, improving the quality of the resulting product and increasing the reaction rate.
In this work, we used methods for determining the composition and structure of cotton cellulose samples. The reactivity of the obtained samples to acetylation after treatment with electric charges was studied. An increase in reactivity was evaluated by a decrease in crystalline areas based on diffractograms that were recorded on a computer-controlled XRD-6100 apparatus (Shimadzu, Japan). A method is proposed for increasing the reactivity of cotton cellulose by treating it with high voltage electric charges. To reduce the crystalline areas of cotton cellulose, it was activated by an electric charge, which led to an increase in the reactivity of cotton cellulose. The optimal voltage limits are found, the number of pulses and the required capacitance of the capacitor, at which the maximum values of the reactive activity of cotton cellulose are achieved.
Muammoning kelib chiqishi. Kimyoviy ishlov berish jarayonida paxta sellyulozasining reaksion faolligi boshqa tsellyuloza o‘z ichiga olgan o‘simliklardan olingan tsellyulozalarga nisbatan ancha past. Paxta sellyulozasining reaksion faolligini oshirish unga asoslangan mahsulotlar sifatini yaxshilaydi.
Ushbu ishning maqsadi kimyoviy qayta ishlangan paxta sellyulozasining reaksion faoligini oshirish, olingan mahsulot sifatini yaxshilash va reaksiya tezligini oshirish orqali xorijiy davlatlardan olib kelingan yog‘och sellyulozasini mahalliy paxta sellyulozasi bilan almashtirish imkoniyatini o‘rganishdir.
Ushbu ishda paxta tsellyulozasi namunalarining tarkibi va tuzilishini aniqlash usullari qo‘llanilgan. Elektr zaryadlari bilan ishlov berilgandan so‘ng olingan namunalarning atsetilatsiyaga reaksiya faolligi o‘rganildi. Reaksion faollikning ortishi kompyuter tomonidan boshqariladigan XRD-6100 asbobida (Shimadzu, Yaponiya) qayd etilgan diffraksion naqshlar asosida kristalli hududlarning pasayishi bilan hisoblab chiqilgan. Paxta sellyulozasining yuqori kuchlanishli elektr zaryadlari bilan ishlov berish orqali uning reaksion faolligini oshirish uchun usul taklif etiladi. Paxta tsellyulozasining kristal maydonini kamaytirish uchun u elektr zaryad bilan faollashtirildi, bu esa paxta tsellyulozasining reaksion faolligini oshirishga olib keldi. Optimal kuchlanish chegaralari, impulslar soni va kondansatori kerakli sig‘imi topiladi, bunda paxta sellyulozasining maksimal reaksion faolligiga erishiladi.
Background of the problem. The reactivity of cotton pulp during chemical processing is significantly lower compared to celluloses obtained from other cellulose-containing plants. Increasing the reactivity of cotton cellulose improves the quality of the products based on it, and also increases labor productivity.
The aim of this work is to study the possibility of replacing wood pulp imported from foreign countries with domestic cotton cellulose by increasing the reactivity of cotton cellulose for chemical processing, improving the quality of the resulting product and increasing the reaction rate.
In this work, we used methods for determining the composition and structure of cotton cellulose samples. The reactivity of the obtained samples to acetylation after treatment with electric charges was studied. An increase in reactivity was evaluated by a decrease in crystalline areas based on diffractograms that were recorded on a computer-controlled XRD-6100 apparatus (Shimadzu, Japan). A method is proposed for increasing the reactivity of cotton cellulose by treating it with high voltage electric charges. To reduce the crystalline areas of cotton cellulose, it was activated by an electric charge, which led to an increase in the reactivity of cotton cellulose. The optimal voltage limits are found, the number of pulses and the required capacitance of the capacitor, at which the maximum values of the reactive activity of cotton cellulose are achieved.
В статьерассматриваетсяреакционная способность хлопковой пульпы во время химической обработки значительно ниже по сравнению с целлюлозами, полученными от других целлюлозосодержащих растений. Повышение реакционной способности хлопковой целлюлозы улучшает качество продуктов на ее основе, а также повышает производительность труда.
Целью данной работы является изучение возможности замены древесной массы, импортируемой из зарубежных стран, на отечественную хлопковую целлюлозу путем повышения её реакционной способности для химической обработки, улучшения качества получаемого продукта и повышения скорости реакции.
В работе использовались методы определения состава и структуры образцов хлопковой целлюлозы. Изучена реакционная способность полученных образцов к ацетилированию после обработки электрическими зарядами. Повышение реактивности оценивали по уменьшению кристаллических областей на основе дифрактограмм, которые были записаны на управляемом компьютером приборе XRD-6100 (Shimadzu, Япония). Предложен способ повышения реакционной способности хлопковой целлюлозы путем обработки ее электрическими зарядами высокого напряжения. Чтобы уменьшить кристаллические площади хлопковой целлюлозы, она активировалась электрическими зарядами, что приводило к увеличению реакционной способности хлопковой целлюлозы. Найдены оптимальные пределы напряжения, количество импульсов и требуемая емкость конденсатора, при которых достигаются максимальные значения реактивности хлопковой целлюлозы.
| № | Author name | position | Name of organisation |
|---|---|---|---|
| 1 | Sayfutdinov R.S. | professor | Тошкент кимё-технология институти |
| 2 | Mukhitdinov U.D. | докторант | Тошкент кимё-технология институти |
| 3 | Eshpulatov N.M. | Assistant | Тошкент кимё-технология институти |
| № | Name of reference |
|---|---|
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