Bio-nanocomposite material

EP4587511A1Pending Publication Date: 2025-07-23POLITECNICO DI MILANO +3
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Patent Information

Application Number
EP2023789365
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-09-16
Filing Date
2023-09-15
Publication Date
2025-07-23

AI Technical Summary

Technical Problem

Current printed electronics face challenges in developing flexible and elastic materials that are biodegradable, non-toxic, and resistant to moisture, particularly for applications involving the human body, where materials must withstand significant mechanical stresses and environmental exposure. Existing polymers from petroleum sources are not biodegradable, and natural polymers with oxygenated or nitrogenated functional groups often exhibit strong supra-molecular interactions that hinder mobility and elasticity. Additionally, the use of allotropes of sp2 carbon, such as graphene, requires chemical modification that can be toxic and compromise electrical conductivity.

Method used

A bio-nanocomposite material is developed using proteins extracted from the Black Soldier Fly (BSF) mixed with an aliphatic hydrocarbon compound and an adduct of sp2 carbon with a pyrrole derivative, which enhances dispersion and reduces hydrophilicity, resulting in a biodegradable, compostable, and moisture-resistant material with high electrical conductivity and mechanical flexibility. This material valorizes organic waste and avoids the use of toxic solvents and harsh reaction conditions.

Benefits of technology

The bio-nanocomposite material achieves superior electrical and mechanical properties compared to petroleum-derived polymers, maintaining conductivity and flexibility under mechanical stress and in humid environments, while being sustainable and recyclable, effectively addressing the limitations of existing materials in printed electronics.

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Abstract

The invention concerns a bio-nanocomposite material comprising: - at least a protein extract; - at least an aliphatic hydrocarbon compound selected from: iii) C2-C21 containing at least an oxygenated functional group selected from the group consisting of hydroxyl, epoxide, ether, acid, ester, carbonate; ii) polyethylene glycol (PEG) with a molecular weight in the range from 0.2 to 35 kDa; and iii) polytetrahydrofuran with a molecular weight in the range from 0.25 to 2.9 kDa; and - at least an adduct of an allotrope of sp2 carbon with at least a pyrrolic derivative of Formula (i), wherein - R1-R4 are independently selected from the group consisting of hydrogen, C1-C3 alkyl, linear or branched C2-C10 alkenyl or alkynyl, aryl, linear or branched C1-C10 alkyl-aryl, linear or branched C2-C10 alken-aryl, linear or branched C2-C10 alkyn-aryl and heteroaryl; - W is selected from the group consisting of hydrogen, linear or branched C1- C10 alkyl, linear or branched C2-C10 alkenyl or alkynyl, aryl, linear or branched C1-C10 alkyl-aryl, linear or branched C2-C10 alken-aryl, linear or branched C2-C10 alkyn-aryl, heteroaryl, carboxyl and a group of Formula, wherein - M, J and Q are independently selected from the group consisting of hydrogen, hydroxyl, amine, linear or branched C1-C10 alkyl, linear or branched C2-C10 alkenyl or alkynyl and a group selected from: wherein: - R5-R19 are independently selected from the group consisting of hydrogen, linear or branched C1-C10 alkyl, linear or branched C2-C10 alkenyl or alkynyl, aryl, linear or branched C1-C10 alkyl-aryl, linear or branched C2- C10 alken-aryl, linear or branched C2-C10 alkyn-aryl, heteroaryl or carboxyl; - R14-R16 are selected from -OCH3 and -OCH2-CH3; - R18 is selected from -CH2-SH and -CH2-CH2-S-CH3; - T is oxygen or sulfur, with the proviso that when T is sulfur m' is an integer from 1 to 4 and when T is oxygen m' is an integer from 1 to 2; - I', p', q', r' are independently integer from 0 to 12; and R20 is selected from the group consisting of hydrogen, alkyl, aryl, benzyl, amine, alkyl-amine, aryl-amine, benzyl-amine and amino-aryl; and R21-R25 are independently selected from the group consisting of hydrogen, linear or branched C1-C10 alkyl, linear or branched C2-C10 alkenyl or alkynyl and 1-(4-aminocyclohexyl) methylene, wherein said at least a protein extract is extracted from the Black Soldier Fly (BSF) Hermetia illucens, and wherein said allotrope of sp2 carbon has a surface area higher than 60 m2 / g, measured by BET in accordance with the standard ASTM D3037.
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