Sustainable ultra‐strong thermally conductive wood‐based antibacterial structural materials with anti‐corrosion and ultraviolet shielding

Abstract

In light of the uprising global development on sustainability, an innovative and environmental friendly wood‐based material derived from natural pinewood has been developed as a high‐performance alternative to petrochemical‐based materials. The wood‐based functional material, named as BC‐CaCl2, is synthesized through the coordination of carboxyl groups (−COOH) present in pinewood with calcium ions (Ca2+), which facilitates the formation of a high‐density cross‐linking structure through the combined action of intermolecular hydrogen bonds. The as‐prepared BC‐CaCl2 exhibits excellent tensile strength (470.5 MPa) and flexural strength (539.5 MPa), establishing a robust structural basis for the materials. Meanwhile, BC‐CaCl2 shows good water resistance, thermal conductivity, thermal stability, UV resistance, corrosion resistance, and antibacterial properties. BC‐CaCl2 represents a viable alternative to petrochemical‐based materials. Its potential application areas include waterproof enclosure structure of buildings, indoor underfloor heating, outdoor UV resistant protective cover, and anti‐corrosion materials for installation engineering, and so forth.image

Photo‐thermo‐electric hydrogel with interlocking photothermal layer and hydrogel for enhancement of thermopower generation

“…The PA‐PEI‐Fe photothermal film prepared via the oxidation of PA (0.1 mol L −1 ) and PEI (0.2 g L −1 ) by [Fe(CN) 6 ] 3− is thus used as the prototype in all experiments. In the UV diffuse reflection spectra (Figure 3B), the PA‐PEI‐Fe photothermal film shows an enhanced absorbance coefficient compared with the pure PA‐PEI film ranging from the UV to NIR region 44 . We compared the photothermal conversion effect of the PA‐PEI and PA‐PEI‐Fe film in this work and the classic commercially available photothermal materials of carbon nanotubes (CNT).…”

“…In the UV diffuse reflection spectra (Figure 3B), the PA-PEI-Fe photothermal film shows an enhanced absorbance coefficient compared with the pure PA-PEI film ranging from the UV to NIR region. 44 We compared the photothermal conversion effect of the PA-PEI and PA-PEI-Fe film in this work and the classic commercially available photothermal materials of carbon nanotubes (CNT). CNT and pure PA film have a similar increase in temperature (rising to $57 C), whereas the temperature of the PA-PEI-Fe photothermal film rises to a higher temperature of $66 C (Figure 3C,D).…”

Laser‐induced graphene formation on recycled woods for green smart furniture

“…8,9 These also include wood-based antibacterial structural material production technology, achieved through chemical treatment and heat pressure treatment, as well as 3D molded wood production technology, which manipulates the wood cell wall structure. 10,11 Moreover, transparent wood production technology, achieved through delignification and polymer infiltration, represents another avenue of ongoing research. 12 Collectively, these diverse technological advancements signify a continuous pursuit towards optimizing the utilization of wood resources.…”

Highly Thermally Conductive Aramid Nanofiber Composite Films with Synchronous Visible/Infrared Camouflages and Information Encryption

“…[5][6][7] Notably, equipment employed for battlefield information gathering must possess stealth and camouflage capabilities under visible light/infrared reconnaissance conditions to enhance its survival capabilities, [8,9] making it imperative to encrypt the transmitted information data to ensure the security of battlefield information. [10,11] Therefore, the development of highly thermally conductive and electrical insulating composites with both visible light/infrared camouflage and information encryption is deemed to play a pivotal role in expediting the application of 5G communication technology in military fields. [12,13] Polymeric materials, known for their lightweight, excellent weatherability, and good processability, etc., are extensively employed as the matrix for thermally conductive composites.…”

“…Nevertheless, the elevated data transmission bandwidth, increased terminal link equipment, and heightened real‐time data exchange inherent in 5G will result in huge heat accumulation, [3,4] urging and necessitating the advancement of highly thermally conductive and electrical insulating materials to guarantee the working stability and reliability of 5G equipment [5–7] . Notably, equipment employed for battlefield information gathering must possess stealth and camouflage capabilities under visible light/infrared reconnaissance conditions to enhance its survival capabilities, [8,9] making it imperative to encrypt the transmitted information data to ensure the security of battlefield information [10,11] . Therefore, the development of highly thermally conductive and electrical insulating composites with both visible light/infrared camouflage and information encryption is deemed to play a pivotal role in expediting the application of 5G communication technology in military fields [12,13] …”