Wearable Janus‐Type Film with Integrated All‐Season Active/Passive Thermal Management, Thermal Camouflage, and Ultra‐High Electromagnetic Shielding Efficiency Tunable by Origami Process

Abstract

Multifunctional films with integrated temperature adjustment, electromagnetic interference (EMI) shielding, and thermal camouflage are remarkably desirable for wearable products. Herein, a novel Janus-type multifunctional ultra-flexible film is fabricated via continuous electrospinning followed by spraying. Interestingly, in the polyvinyl alcohol (PVA)/phase change capsules (PCC) layer (P 1 ), the PCC is strung on PVA fibers to form a stable "candied haws stick" structure that obviates slipping or falling off. The film with sufficient melting enthalpy (141.4 J g −1 ) guarantees its thermoregulation capability. Simultaneously, its high mid-IR emissivity (90.15%) endows the film with radiative cooling properties (reducing temperature by 10.13 °C). Mechanical strength is significantly improved by superimposing a polylactic acid (PLA) layer (P 2 ) on its surface.

Biodegradable electrospun fibers as sustained‐release carriers of insect pheromones for field trapping of Spodoptera litura (Lepidoptera: Noctuidae)

“…This may be one of the reasons for the rapid release of TDDA from electrospun film in field environment. In the future, the UV resistance of electrospun films will be enhanced through fiber structure design 45 …”

“…In the future, the UV resistance of electrospun films will be enhanced through fiber structure design. 45 The release properties of electrospun films are the focus of this study, which is one of the cores of the development of sex attractants. In this study, the pheromone-loading efficiency, release profiles and half-lives of all carriers were relatively similar.…”

Carbonized Syndiotactic Polystyrene/Carbon Nanotube/MXene Hybrid Aerogels with Egg-Box Structure: A Platform for Electromagnetic Interference Shielding and Solar Thermal Energy Management

“…Phase-change capsules (PCCs) were also introduced within the MXene-based composites, possessing an EMI SE value of 43.1 dB and a thermal enthalpy of 136.8 J g –1 . A Janus-type multifunctional ultra-flexible film was fabricated by spray-coating a thin MXene layer onto one surface of a PCC-contained membrane, demonstrating satisfactory performances in low-voltage heating, photothermal conversion, and superior thermal camouflage . However, these PCMs were limited to hydrophilic polymers or PCCs, restricting their potential applications and latent heat values.…”

A Hierarchically Nanofibrous Self-Cleaning Textile for Efficient Personal Thermal Management in Severe Hot and Cold Environments

“…There have been some attempts to investigate the potential of functionalized textiles for personal thermal management, and most research has focused on localized temperature regulation through advanced textiles with single or dual-mode capabilities. − For instance, by adjusting the optical properties based on the surface of the textiles, single temperature-controlled textiles are prepared that can effectively achieve personal radiative cooling or radiative heating performances. − Additionally, dynamic temperature control textiles, such as Janus textiles, and temperature or humidity responsive textiles can meet personal thermal regulation. Nonetheless, these textiles are usually not appropriate for use in severely hot and cold environments owing to their limited temperature regulation capabilities, which could cause heat/cold stress and serious medical emergencies . Up to now, designing textiles that can achieve personal thermal management in severely high and low temperatures is highly desirable yet tremendously challenging.…”

“…Nonetheless, these textiles are usually not appropriate for use in severely hot and cold environments owing to their limited temperature regulation capabilities, which could cause heat/ cold stress and serious medical emergencies. 28 Up to now, designing textiles that can achieve personal thermal management in severely high and low temperatures is highly desirable yet tremendously challenging.…”