What does this research mean for the field?

An engineered biochar-graphene hybrid paper membrane composite, synthesized from food waste, achieves high latent heat retention, enhanced thermal conductivity, and effective moisture management for sustainable thermal energy storage. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To develop an eco-friendly biochar-graphene phase-change composite membrane derived from food waste for simultaneous long-term latent heat storage, leakage prevention, and moisture regulation.

August 23, 2026BiocharOpen Access

Engineered biochar-graphene hybrid paper membranes for long-term thermal energy storage and ventilation energy recovery

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Authors

DADimberu G. Atinafu HKHarn Wei Kua YKYujin Kang

Discussion

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Overview

Experimental study demonstrates enhanced latent heat storage and moisture permeability in biochar-graphene paper membranes, suggesting sustainable hygrothermal management for buildings.

Key Points

To develop an eco-friendly biochar-graphene phase-change composite membrane derived from food waste for simultaneous long-term latent heat storage, leakage prevention, and moisture regulation.
Synthesized biochar from food waste via 400 °C slow carbonization, chemical activation with KOH at 600–800 °C, and ultrasonic graphitization.
Impregnated the engineered biochar with docosane (C22) phase-change material under vacuum and bonded it to a paper membrane.
Evaluated pore microstructure, thermal conductivity, enthalpy stability across 1000 thermal cycles, and water-vapor permeability in accordance with ISO 12572 and ASTM standards.
The optimal 700 °C activated biochar (FK7G) showed a surface area of 323.1 m² g⁻¹ with 82.8% mesoporosity and maintained 90.2% enthalpy retention after 1000 thermal cycles.
The engineered composite achieved a 72.0% increase in latent heat compared to pristine biochar composites and increased thermal conductivity by 96.1% over pristine membrane references.
The paper-integrated composite exhibited high water-vapor permeability with an equivalent air-layer thickness (Sd) of 0.71 and preserved 80.2% latent heat retention at 46.7 °C.

Cite This Study

Atinafu et al. (2026) studied this question.

synapsesocial.com/papers/6a8aae007677a34114446ab7 https://doi.org/10.1007/s42773-026-00646-4

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August 23, 2026BiocharOpen Access

Engineered biochar-graphene hybrid paper membranes for long-term thermal energy storage and ventilation energy recovery

View Full Paper

Ask AI

Bookmark

Authors

DADimberu G. Atinafu HKHarn Wei Kua YKYujin Kang

Discussion

Member takes

Overview

Experimental study demonstrates enhanced latent heat storage and moisture permeability in biochar-graphene paper membranes, suggesting sustainable hygrothermal management for buildings.

Key Points

To develop an eco-friendly biochar-graphene phase-change composite membrane derived from food waste for simultaneous long-term latent heat storage, leakage prevention, and moisture regulation.
Synthesized biochar from food waste via 400 °C slow carbonization, chemical activation with KOH at 600–800 °C, and ultrasonic graphitization.
Impregnated the engineered biochar with docosane (C22) phase-change material under vacuum and bonded it to a paper membrane.
Evaluated pore microstructure, thermal conductivity, enthalpy stability across 1000 thermal cycles, and water-vapor permeability in accordance with ISO 12572 and ASTM standards.
The optimal 700 °C activated biochar (FK7G) showed a surface area of 323.1 m² g⁻¹ with 82.8% mesoporosity and maintained 90.2% enthalpy retention after 1000 thermal cycles.
The engineered composite achieved a 72.0% increase in latent heat compared to pristine biochar composites and increased thermal conductivity by 96.1% over pristine membrane references.
The paper-integrated composite exhibited high water-vapor permeability with an equivalent air-layer thickness (Sd) of 0.71 and preserved 80.2% latent heat retention at 46.7 °C.

Cite This Study

Atinafu et al. (2026) studied this question.

synapsesocial.com/papers/6a8aae007677a34114446ab7 https://doi.org/10.1007/s42773-026-00646-4

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