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Featured researches published by Biwan Xu.


RSC Advances | 2015

Preparation and characterization of an expanded perlite/paraffin/graphene oxide composite with enhanced thermal conductivity and leakage-bearing properties

Zeyu Lu; Dongshuai Hou; Biwan Xu; Zongjin Li

A novel phase change material (PCMs) of expanded perlite/paraffin/graphene oxide (EP/PA/GO) with enhanced thermal conductivity and leakage-bearing properties was fabricated by depositing GO films on the surface of the EP/PA composite. The as-prepared EP/PA/GO composite was characterized by using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) techniques. The experimental results indicated that due to the small loading of the GO incorporated, the EP/PA/GO composite showed a small latent heat capacity and weight loss, and the thermal conductivity significantly increased with increasing the content of GO up to 0.5 wt%. The heat storage/release performance test results demonstrated that the EP/PA composite with 0.5 wt% GO had 2 times faster heat storage/release rate compared to the EP/PA composite because of the enhanced thermal conductivity. In addition, the FTIR and TGA results indicated that the EP/PA/GO composite had good chemical compatibility and thermal stability. More importantly, the GO films covering the surface of the EP/PA composite can greatly prevent the leakage problems of molten paraffin. No leakage of paraffin occurred even after thermal cycling 3000 times. Therefore, the EP/PA/GO composite has a great potential for thermal energy storage applications due to its enhanced thermal properties, good leakage-bearing properties and excellent chemical compatibility.


Applied Energy | 2013

Paraffin/diatomite composite phase change material incorporated cement-based composite for thermal energy storage

Biwan Xu; Zongjin Li


Energy | 2014

Paraffin/diatomite/multi-wall carbon nanotubes composite phase change material tailor-made for thermal energy storage cement-based composites

Biwan Xu; Zongjin Li


Cement and Concrete Research | 2014

Magnesium potassium phosphate cement paste: Degree of reaction, porosity and pore structure

Hongyan Ma; Biwan Xu; Zongjin Li


Materials & Design | 2014

Effects of water content, magnesia-to-phosphate molar ratio and age on pore structure, strength and permeability of magnesium potassium phosphate cement paste

Hongyan Ma; Biwan Xu; Jun Liu; Huafu Pei; Zongjin Li


Solar Energy | 2014

Preparation and characterization of expanded perlite/paraffin composite as form-stable phase change material

Zeyu Lu; Biwan Xu; Jinrui Zhang; Yu Zhu; Guoxing Sun; Zongjin Li


Applied Energy | 2015

Paraffin/expanded vermiculite composite phase change material as aggregate for developing lightweight thermal energy storage cement-based composites

Biwan Xu; Hongyan Ma; Zeyu Lu; Zongjin Li


Cement and Concrete Research | 2015

Influence of magnesia-to-phosphate molar ratio on microstructures, mechanical properties and thermal conductivity of magnesium potassium phosphate cement paste with large water-to-solid ratio

Biwan Xu; Hongyan Ma; Zongjin Li


Energy | 2015

Effects of the form-stable expanded perlite/paraffin composite on cement manufactured by extrusion technique

Zeyu Lu; Jinrui Zhang; Guoxing Sun; Biwan Xu; Zongjin Li; Chenchen Gong


Materials and Structures | 2016

Influence of cenospheres on properties of magnesium oxychloride cement-based composites

Biwan Xu; Hongyan Ma; Chuanlin Hu; Zongjin Li

Collaboration


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Hongyan Ma

Missouri University of Science and Technology

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Zeyu Lu

Hong Kong University of Science and Technology

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Chuanlin Hu

Hong Kong University of Science and Technology

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Guoxing Sun

Hong Kong University of Science and Technology

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Jinrui Zhang

Hong Kong University of Science and Technology

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Barbara Lothenbach

Swiss Federal Laboratories for Materials Science and Technology

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Binmeng Chen

Hong Kong University of Science and Technology

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Honggang Zhu

Hong Kong University of Science and Technology

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Hongyu Shao

Hong Kong University of Science and Technology

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Shuqing Yang

Hong Kong University of Science and Technology

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