
Improving the production technology of products with improved quality indicators and with less impact on the environment remains an urgent scientific and practical problem of paper industry enterprises. This refers to the technology for the production of paper-bases for wallpaper using environmentally safe chemical additives, in particular nanocellulose (NC), which was obtained by acid hydrolysis from reed cellulose. The production of cellulose was carried out in two stages - extraction from reed stalks with a solution of alkali and an organosolvent method of cooking in a solution of peracetic acid. The obtained organosolvent cellulose contained the remains of lignin and mineral substances, which allows it to be used for the preparation of NC. As a result of the hydrolysis of organosolvent cellulose, a time-stable NC suspension was extracted, the properties of which were investigated by scanning electron microscopy (morphological changes in the structure of reed cellulose-containing materials), atomic force microscopy (determination of topographic characteristics of NC), analysis of electronic absorption spectra (transparency of NC films). It was established that reed NC films had nanoparticles with a cross-sectional size of 5-25 nm, density up to 1.52 g/cm3, transparency up to 81.6 %, tensile strength up to 65 MPa. For the production of castings of paper-bases for wallpaper samples, sulfated pine bleached cellulose and polyester synthetic fiber were used, to the fibrous mass of which were added the following chemical additives: alkyl ketene dimer, reed NC, binder, and optical brightener. It has been shown that the use of nanocellulose at a rate of 0.35 % to 1.0 % of the paper mass leads to a significant improvement in the physical and mechanical quality indicators of the paper base for wallpaper. It was established that the replacement of 50 % of the synthetic chemical auxiliary substance alkyl ketene dimer with nanocellulose or additional application of nanocellulose at a rate of 0.5 g/m2 on the surface of the casting with 0.7 % alkyl ketene dimer allows to obtain paper that meets the requirements of the standard. The obtained results indicate the prospects of using reed nanocellulose for the production of other mass types of paper and cardboard.
Стаття присвячена процесу вилучення целюлози із стебел очерету екологічно безпечним органосольвентним способом делігніфікації, одержанню з неї наноцелюлози кислотним гідролізом і дослідженню впливу наноцелюлози на показники якості паперу-основи для шпалер. Термохімічна обробка стебел очерету проведена у дві стадії – лужна екстракція та органосольвентне варіння, що дозволяє отримати целюлозу, придатну для одержання наноцелюлози. В результаті процесу гідролізу органосольвентної целюлози екстраговано стабільну у часі суспензію наноцелюлози із частинками діаметром 5-25 нм, із щільністю до 1,52 г/см3, прозорістю до 81,6 %, міцністю на розрив до 65 МПа. Показано, що використання наноцелюлози з витратою до 1 % від маси паперу призводить до суттєвого покращення фізико-механічних показників якості паперу-основи для шпалер. Встановлено, що заміна 50% синтетичної хімічної допоміжної речовини алкіл кетен димеру на наноцелюлозу або додатковим нанесенням наноцелюлози з витратою 0,5 г/м2 на поверхню відливки з 0,7 % алкіл кетен димером дозволяє отримати папір, який задовольняє вимогам стандарту.
показники якості паперу, наноцелюлоза, reed stalks, environmental friendliness, resource efficiency, папір-основа для шпалер, paper quality indicators, ресурсоефективність, nanocellulose, paper-bases for wallpaper, стебла очерету, екологічність
показники якості паперу, наноцелюлоза, reed stalks, environmental friendliness, resource efficiency, папір-основа для шпалер, paper quality indicators, ресурсоефективність, nanocellulose, paper-bases for wallpaper, стебла очерету, екологічність
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