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In order to quantitatively grasp the moisture absorption/desorption process of moisture control materials and give better play to its moisture control effect, there have been continuous studies on the continuous improvement and optimization of the mathematical model of moisture absorption/desorption of humidity control materials, from the initial empirical parameter model to the mechanism model based on physical process, the accuracy has been continuously improved. Taking the silica gel moisture control material as an example, combined with the applicability characteristics of the museum application scene, the research progress of its moisture absorption/desorption model is summarized, and the related issues that need to be paid attention to and solved are discussed. [ABSTRACT FROM AUTHOR]

To meet the demands for flexible electromagnetic interference (EMI) shielding materials, a type of conductive fabric is prepared by generating three-dimensional (3D) porous laser-induced graphene (LIG) in situ on the surface of the aramid fabric (AF) and then electroless plating copper. After LIG treatment, the porous AF demonstrates admirable conductivity due to the generation of graphene. The superior surface resistance of the conductive fabric can reach 1.57 Ω/sq after copper deposition, and the average EMI shielding effectiveness (SE) can reach 34.3 dB in a frequency range of 8.2 to 12.4 GHz, with the EMW absorption accounting for about 80%. The proposed technology provides a new idea for preparation of flexible EMI shielding materials. [ABSTRACT FROM AUTHOR]

With the wide use of three-dimensional woven spacer composites ( 3DWSCs), the market expects greater mechanical properties from this material. By changing the weft fastening method of the traditional I-shape pile yarns, we designed three-dimensional woven spacer fabrics (3DWSFs) and 3DWSCs with the weft V-shape to improve the compression performance of traditional 3DWSFs. The effects of weft binding structures, V-pile densities, and Vshaped angle were investigated in this paper. It is found that the compression resistance of 3DWSFs with the weft V-shape is improved compared to that with the weft I-shape, the fabric height recovery rate is as high as 95. 7%, and the average elastic recovery rate is 59. 39%. When the interlayer pile yarn density is the same, the weft V-shaped and weft I-shaped 3DWSCs have similar flatwise pressure and edgewise pressure performance. The compression properties of the composite improve as the density of the Vpile yarns increases. The flatwise compression load decreases as the V-shaped angle decreases. When the Vshaped angle is 28° and 42°, the latitudinal V-shaped 3DWSCs perform exceptionally well in terms of anticompression cushioning. The V-shaped weft binding method offers a novel approach to structural design of 3DWSCs. [ABSTRACT FROM AUTHOR]

The main objective of this study was to define the influence of silica aerogels (SAs) through the sol-gel method and oil properties on 3 D weft-knitted spacer fabric sorbents for oil wicking, spreading, swelling, and interception properties (used as an interceptor barrier for vegetable and engine oil in static and dynamic water tests). SEM, FTIR-ATR, XRD, and BET tests of fabric sorbents were studied to explain the impact of SAs. The oil spreading rate exposed that the higher pore diameter, specific surface area, surface roughness, silica add-on %, water contact angle, and lower surface energy of sorbents exhibited the higher wicking height of 91.5 mm and 85.6 mm for vegetable oil and engine oil, respectively (TS 5). Similarly, the static intercepting experiment showed the higher oil interception efficiency of 99.01% and 99.89% with the initial leaking time of 24 min and 26 min for vegetable oil and engine oil, respectively. Likewise, the dynamic intercepting test (with water flow rates of 150 mL/s) revealed the higher oil interception efficiency of 98.89% and 99.77% with the initial leaking time of 10 min and 12 min, individually. Moreover, the treated sample showed the lowest oil swelling thickness (0.2 ± 0.1%) whereas the untreated sample showed the highest oil swelling thickness (7.3 ± 0.5%). The experimental results discovered that silica aerogels, fabric properties, and oil features had a substantial impact on oil wicking, spreading, swelling, static, and dynamic tests. Thus, these fabrics could be appropriate for industrial uses as eco-friendly oil clean-up sorbent. [ABSTRACT FROM AUTHOR]