Isolation of chitosan-melanin complex from black soldier fly adults and obtaining nanofibrous materials based on it

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Abstract

The article presents the results of studying the viscosity of chitosan-melanin complex solutions from the larvae of the insect Hermetia illucens and the process of gelation in these solutions in the presence of crosslinking reagents. Chemically cross-linked nanofibers were obtained from solutions of the chitosan-melanin complex in dilute solutions of acetic acid by the method of spinneretless electrospinning. The presence of 14% melanin made it possible to reduce the concentration of acetic acid in the spinning composition.

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About the authors

A. Sh. Khayrova

Federal research centre “Fundamentals of biotechnology” of the Russian Academy of Sciences

Author for correspondence.
Email: adelya15@mail.ru

Bioengineering Institute

Russian Federation, 119071, Moscow

N. A. Sazhnev

The Kosygin Russian State University

Email: adelya15@mail.ru
Russian Federation, 117997, Moscow

D. V. Korobovskaya

The Kosygin Russian State University

Email: adelya15@mail.ru
Russian Federation, 117997, Moscow

S. A. Lopatin

Federal research centre “Fundamentals of biotechnology” of the Russian Academy of Sciences

Email: adelya15@mail.ru

Bioengineering Institute

Russian Federation, 119071, Moscow

N. R. Kildeeva

The Kosygin Russian State University

Email: adelya15@mail.ru
Russian Federation, 117997, Moscow

V. P. Varlamov

Federal research centre “Fundamentals of biotechnology” of the Russian Academy of Sciences

Email: adelya15@mail.ru

Bioengineering Institute

Russian Federation, 119071, Moscow

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Supplementary files

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2. Fig. 1. Dependence of the reduced viscosity on the concentration of the complex: 1 - HTZ-M solution, MM 566 kDa, pH 4.3; 2 - chitosan solution, MM 570 kDa, pH 4.3.

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3. Fig. 2. Dependence of dynamic viscosity on the concentration of the complex: 1 - HTZ-M solution, MM 566 kDa, pH 4.3; 2 - chitosan solution, MM 570 kDa, pH 4.3.

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4. Fig. 3. Dependence of the gelation time in a 2% solution of biopolymers (pH 4.3) on the degree of crosslinking: 1 - chitosan, MM 570 kDa, CP genipin; 2 - CTZ-M, MM 566 kDa, CP genipin; 3 - chitosan, MM 570 kDa, CP glutaraldehyde; 4 - CTZ-M, MM 566 kDa, CP glutaraldehyde.

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5. Fig. 4. AFM image of electrospun fibers from CTZ-M cross-linked with glutaraldehyde (SR/NH2 ratio = 0.08 mol/mol, pH 5.51): a — 2D image; b — 3D image.

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