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Chen S, Xu D, Yin H, Huang R, Qi W, Su R, Zhang K. Large-Scale Engineerable Films Tailored with Cellulose Nanofibrils for Lighting Management and Thermal Insulation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2401283. [PMID: 38924314 DOI: 10.1002/smll.202401283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 06/04/2024] [Indexed: 06/28/2024]
Abstract
Fibrillated cellulose-based nanocomposites can improve energy efficiency of building envelopes, especially windows, but efficiently engineering them with a flexible ability of lighting and thermal management remains highly challenging. Herein, a scalable interfacial engineering strategy is developed to fabricate haze-tunable thermal barrier films tailored with phosphorylated cellulose nanofibrils (PCNFs). Clear films with an extremely low haze of 1.6% (glass-scale) are obtained by heat-assisted surface void packing without hydrophobization of nanocellulose. PCNF gel cakes serve here as templates for surface roughening, thereby resulting in a high haze (73.8%), and the roughened films can block heat transfer by increasing solar reflection in addition to a reduced thermal conduction. Additionally, obtained films can tune distribution of light from visible to near-infrared spectral range, enabling uniform colored lighting and inhibiting localized heating. Furthermore, an integrated simulation of lighting and cooling energy consumption in the case of office buildings shows that the film can reduce the total energy use by 19.2-38.1% under reduced lighting levels. Such a scalable and versatile engineering strategy provides an opportunity to endow nanocellulose-reinforced materials with tunable optical and thermal functionalities, moving their practical applications in green buildings forward.
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Affiliation(s)
- Shaohuang Chen
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-based Nanocomposites, University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany
| | - Dan Xu
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-based Nanocomposites, University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany
| | - Huiting Yin
- Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment, Zhejiang Institute of Tianjin University, Ningbo, 315201, China
| | - Renliang Huang
- Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment, Zhejiang Institute of Tianjin University, Ningbo, 315201, China
- Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources, School of Marine Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Wei Qi
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Rongxin Su
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Ningbo Key Laboratory of Green Petrochemical Carbon Emission Reduction Technology and Equipment, Zhejiang Institute of Tianjin University, Ningbo, 315201, China
- Key Laboratory of Ocean Observation Technology of Ministry of Natural Resources, School of Marine Science and Technology, Tianjin University, Tianjin, 300072, China
| | - Kai Zhang
- Sustainable Materials and Chemistry, Department of Wood Technology and Wood-based Nanocomposites, University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany
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Zou X, Xue R, An Z, Li H, Zhang J, Jiang Y, Huang L, Wu W, Wang S, Hu GH, Li RKY, Zhao H. Recent Advances in Flexible CNC-Based Chiral Nematic Film Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2303778. [PMID: 37752783 DOI: 10.1002/smll.202303778] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/30/2023] [Indexed: 09/28/2023]
Abstract
Cellulose nanocrystal (CNC) is a renewable resource derived from lignocellulosic materials, known for its optical permeability, biocompatibility, and unique self-assembly properties. Recent years have seen great progresses in cellulose nanocrystal-based chiral photonic materials. However, due to its inherent brittleness, cellulose nanocrystal shows limitations in the fields of flexible materials, optical sensors and food freshness testing. In order to solve the above limitations, attempts have been made to improve the flexibility of cellulose nanocrystal materials without destroying their structural color. Despite these progresses, a systematic review on them is lacking. This review aims to fill this gap by providing an overview of the main strategies and the latest research findings on the flexibilization of cellulose nanocrystal-based chiral nematic film materials (FCNM). Specifically, typical substances and methods used for their preparation are summarized. Moreover, different kinds of cellulose nanocrystal-based composites are compared in terms of flexibility. Finally, potential applications and future challenges of flexible cellulose nanocrystal-based chiral nematic materials are discussed, inspiring further research in this field.
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Affiliation(s)
- Xuyang Zou
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Rui Xue
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Zewei An
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Hongwei Li
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Jiale Zhang
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Yan Jiang
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Lijie Huang
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Wei Wu
- Jihua Laboratory, Foshan, 528200, China
| | - Shuangfei Wang
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
| | - Guo-Hua Hu
- Université de Lorraine, CNRS, LRGP, Nancy, F-54001, France
| | - Robert K Y Li
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong
| | - Hui Zhao
- School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, China
- State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life Sciences, Hubei University, Wuhan, China
- Key Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning, 530006, China
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