Construction of Uniform Thermal Network in Passive Radiative Cooling Coatings by Nanocellulose-Mediated Pickering Emulsion Template
- 1China Construction Eco-Development New Energy Co., Ltd., Nanjing 210012, China
- 2Center for Composite Materials and Structures, School of Astronautics, Harbin Institute of Technology, Harbin 150006, China
- 3Research & Development Center, China Construction Eco-Development Group Co., Ltd., Suzhou 215000, China
Abstract
Developing high-performance passive radiative cooling coatings (PRCC) with high thermal conductivity for fast heat dissipation from self-heating objects remains a significant challenge. In this study, a nanocellulose-mediated Pickering emulsion strategy was employed to construct a uniform hexagonal boron nitride (BN) thermal network within PRCC. Benefiting from the Pickering emulsion template stabilized by TEMPO-oxidized cellulose nanofibrils (TOCNF), BN nanosheets and other functional inorganic nanoparticles were uniformly dispersed in the PRCC matrix, forming a continuous and homogeneous thermally conductive network. This structural design endowed the PRCC with excellent thermal conductivity, high solar reflectance in the solar spectrum (0.3–2.5 μm), and strong emissivity in the “atmospheric window” (ATSW, 8–13 μm). Specifically, the thermal conductivity of the TOCNF-BN-modified PRCC reached 2.28 ± 0.15 W·m−1·K−1, which was significantly higher than that of the pristine PRCC. The coating exhibited a solar reflectivity of ~87% and an emissivity of ~93% in the ATSW. Outdoor model temperature tests indicated that the internal temperature of the PRCC-TOCNF-BN-coated metal cabinet was 9.6 °C lower than that of the bare cabinet and 6.7 °C lower than the cabinet coated with pristine PRCC. This novel approach of using Pickering emulsion templates to fabricate highly thermally conductive radiative cooling coatings provides a new strategy for the development of high-performance and multifunctional radiative cooling materials for thermal management applications.
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BibTeX
@article{pang2026construction,
title = {{Construction of Uniform Thermal Network in Passive Radiative Cooling Coatings by Nanocellulose-Mediated Pickering Emulsion Template}},
author = {Huiwen Pang and Jiaqi Zhu and Zenghui Xu and Tong Wang and Xiang Li and Xing Chen and Niancheng Hong},
journal = {Polymers},
year = {2026},
month = oct,
doi = {10.3390/polym18202591},
url = {https://www.mdpi.com/2073-4360/18/20/2591},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Construction of Uniform Thermal Network in Passive Radiative Cooling Coatings by Nanocellulose-Mediated Pickering Emulsion Template
AU - Huiwen Pang
AU - Jiaqi Zhu
AU - Zenghui Xu
AU - Tong Wang
AU - Xiang Li
AU - Xing Chen
AU - Niancheng Hong
PY - 2026
DA - 2026/10/01
JO - Polymers
DO - 10.3390/polym18202591
UR - https://www.mdpi.com/2073-4360/18/20/2591
AB - Developing high-performance passive radiative cooling coatings (PRCC) with high thermal conductivity for fast heat dissipation from self-heating objects remains a significant challenge. In this study, a nanocellulose-mediated Pickering emulsion strategy was employed to construct a uniform hexagonal boron nitride (BN) thermal network within PRCC. Benefiting from the Pickering emulsion template stabilized by TEMPO-oxidized cellulose nanofibrils (TOCNF), BN nanosheets and other functional inorganic nanoparticles were uniformly dispersed in the PRCC matrix, forming a continuous and homogeneous thermally conductive network. This structural design endowed the PRCC with excellent thermal conductivity, high solar reflectance in the solar spectrum (0.3–2.5 μm), and strong emissivity in the “atmospheric window” (ATSW, 8–13 μm). Specifically, the thermal conductivity of the TOCNF-BN-modified PRCC reached 2.28 ± 0.15 W·m−1·K−1, which was significantly higher than that of the pristine PRCC. The coating exhibited a solar reflectivity of ~87% and an emissivity of ~93% in the ATSW. Outdoor model temperature tests indicated that the internal temperature of the PRCC-TOCNF-BN-coated metal cabinet was 9.6 °C lower than that of the bare cabinet and 6.7 °C lower than the cabinet coated with pristine PRCC. This novel approach of using Pickering emulsion templates to fabricate highly thermally conductive radiative cooling coatings provides a new strategy for the development of high-performance and multifunctional radiative cooling materials for thermal management applications.
SN - 2073-4360
ER -