Strain sensors that are made of textiles offer wearability and large strain sensing range. Recent exciting developments in material, structure, fabrication, performance, and application of textile strain sensors are evaluated and guidelines are provided to overcome the current challenges.
Lignin is a promising UV-shielding material to substitute the synthetic absorbers in a composite due to its excellent UV-shielding property. The chromophores group of lignin is responsible for the UV-shielding property of composites, but it brings an undesirable dark color. This perspective is the first to review the recent progress on fabricating light-colored UVshielding composites that contain lignin; we provide a clear picture of the concept of light-colored UV-absorbing lignin composite materials that can be used in food packaging, healthcare products, and solar panel protection. The UV-absorbing and photostability mechanisms are introduced by correlating UV absorption with intrinsic factors, like phenolic substructures and molecular weight of lignin. Extrinsic factors that affect the UV-shielding properties and color of lignin, such as the extraction process, chemical modification method, and obtained size of lignin, are also systematically discussed in this perspective. By summarizing recent studies on the synergetic effect between the lignin and the second constitute materials, this perspective discusses the benefits of lignin to the composite's overall properties, such as stability under UV radiation, mechanical property, dispersity, and water permeability.
The concept of thermoregulating textiles
capable of providing personal
thermal management property (PTM) has attracted significant attention
in recent years. It is considered as an emerging approach to promote
the comfort and general well-being of wearers and also to mitigate
the energy consumption load for indoor living space conditioning.
Regulating the heat exchange between human body and environment has
been the core subject of many studies on introducing the PTM functionality
to textiles. This work provides an overview of the latest literature,
summarizing the recent innovations and state-of-the-art approaches
of controlling the heat gain and loss of textiles. To this end, methods
to control the fundamental aspects of heat gain and loss of fabrics
such as using near-infrared reflective materials and conductive nanomaterials,
designing photonic structures of fabrics, and engineering nanoporous
structures for passive cooling and heating effects will be discussed.
Moreover, specific attention is given to the application of phase
change materials in textiles, their integration methods, and the associated
mechanisms. Several commercial methods such as adapting the innovative
designs, introducing moisture management capability, and using air/liquid
thermoregulating systems will also be discussed. This review article
provides a clear picture of the concept of thermoregulating textiles
and recommends some future research trajectories for this emerging
field.
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