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Latent heat storage (LHS) possesses a great energy storage density, which can reduce the pressure of imbalance between energy consumption and supply. As a commonly used medium for LHS, phase change materials (PCMs) have received growing attentions. However, some inherent defects limit further applications of PCMs. In this work, a exible porous framework was constructed using the melamine foam (MF) as the template and the multi-walled carbon nanotubes (MWCNTs)/bacterial cellulose (BC) hybrids as the ller, then the PEG was encapsulated to fabricate the composite PCMs. Herein, we investigated the microstructure and exibility of the three-dimensional (3D) porous matrix, and the microscopic morphology, encapsulation capacity, heat storage/release behavior, temperature regulation ability and light to thermal conversion performance of the composite PCMs were also studied. Experimental results suggested that the prepared 3D skeleton had ultra-light characteristics and outstanding resilience performance. The involvement of BC increased the speci c surface area of the MF skeleton, thus its adsorption to PCMs was more stable. The thermal energy storage e ciency of composite PCMs was as high as 91.5%. Meanwhile, the composite PCMs performed sensitive thermal response behavior and could generate shape memory driven by heat. Furthermore, it showed excellent light to thermal conversion performance, with a corresponding conversion e ciency of 87.9%. This study provides a new idea for the design and development of advanced composite PCMs, which is expected to expand the applications of PCMs in heat storage, energy conversion and solar energy utilization.

Warp-knitted brush fabrics are composed of an outer surface formed by weaving the front and rear needle beds with spacer yarns interposed between them. Warp-knitted brush fabrics can be used as a non-slip cover for car seat cushions; the adhesion between non-slip fabric and car seat is related to the shear strength of warp-knitted brush fabrics. In this article, to study the factors affecting the shear force of warp-knitted brush fabrics, three different processing methods and four different stretching speed intervals were used to find the effects of stiffeners and action of different speed intervals on shear properties of fabrics. The experimental results show that the stiffener treatment can improve the shear resistance of the warp-knitted brush fabrics, and the effect of different speed intervals can affect the shear resistance of fabrics. These findings will have a guiding significance in the design and production of warp-knitted brush fabrics applied to fabrics such as car seat cushions, and the results can also help to study the shear properties of warp-knitted brush fabrics for wider applications.

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