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Effect of exfoliating agent on rheological behavior of beta-chitin fibrils in aqueous suspensions and on mechanical properties of poly(acrylic acid)beta-chitin compositesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 января 2020 г.
- Авторы: Bogdanova O.I., Istomina A.P., Glushkova N.A., Belousov S.I., Kuznetsov N.M., Polyakov D.K., Malakhov S.N., Krasheninnikov S.V., Bakirov A.V., Kamyshinsky R.A., Vasiliev A.L., Streltsov D.R., Chvalun S.N.
- Журнал: International Journal of Biological Macromolecules
- Том: 139
- Год издания: 2019
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 161
- Последняя страница: 169
- DOI: 10.1016/j.ijbiomac.2019.07.194
- Аннотация: Chitin whiskers are promising reinforcing filler for composites due to their mechanical properties, renewable nature and low cost. A new method for preparation of β-chitin fibrils from squid pens in ascorbic acid aqueous solutions (AscA) was developed. Stirring of the solution with 2 g/l AscA for 2 h disperses the swollen chitin to individualized fibrils with an aspect ratio > 250. The optimal conditions of β-chitin exfoliation in acrylic acid (AcrA) aqueous solution were found (0.75–2 g/l, 3–4 h). TEMPO-oxidized β-chitin fibrils were chosen as a reference sample for comparison of different methods. 0.1% chitin suspensions exfoliated in AscA and AcrA solutions show similar gel-like behavior with a storage modulus (G′) of 98 ± 23 and 34 ± 12 Pa, respectively, whereas G′ of 0.1% dispersion of the TEMPO-oxidized β-chitin fibrils was 0.015 ± 0.005 Pa only. Composites based on poly(acrylic acid) comprising 1–3 wt% of β-chitin fibrils were fabricated by polymerization filling. Mechanical properties of the composites were investigated in dry state in the temperature range of 25–250 °C and at controlled relative humidity in the range from 53.6% to 100%. It was revealed that the maximum reinforcing effect is achieved at high temperature (>120 °C) and high relative humidity (≥75.3%RH).
- Добавил в систему: Кузнецов Никита Михайлович