3D copper nanowires-thermally annealed graphene aerogel (CuNWs-TAGA) framework is firstly prepared by freeze-drying followed by thermal annealing from CuNWs, graphene oxide (GO) and L-ascorbic acid. Epoxy resin is then poured back into the above 3D CuNWs-TAGA framework to fabricate the CuNWs-TAGA/epoxy nanocomposites. CuNWs with average diameter of about 120 nm and length of approximate 10 μm are successfully prepared. When the mass fraction of CuNWs-TAGA is 7.2 wt% (6.0–1.2 wt% CuNWs-TAGA), the thermal conductivity coefficient (λ) value of the CuNWs-TAGA/epoxy nanocomposites reaches the maximum of 0.51 W/mK. Meantime, the CuNWs-TAGA/epoxy nanocomposites exhibit the maximum electromagnetic interference shielding effectiveness (EMI SE) value of 47 dB and electrical conductivity (σ) of 120.8 S/m, ascribed to perfect 3D CuNWs-TAGA conductive network structures. Meanwhile, the corresponding elasticity modulus, hardness, glass transition temperature (Tg) and heat-resistance index (THRI) of the CuNWs-TAGA/epoxy nanocomposites increase to 4.69 GPa, 0.33 GPa, 126.3 °C and 181.7 °C, respectively.

Synchronously improved electromagnetic interference shielding and thermal conductivity for epoxy nanocomposites by constructing 3D copper nanowires/thermally annealed graphene aerogel framework

Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.

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Nanocellulose: From Fundamentals to Advanced Applications

Electrospun nanofiber membranes for wastewater treatment applications

A review of melting and freezing processes of PCM/nano-PCM and their application in energy storage

Melamine foam/reduced graphene oxide supported form-stable phase change materials with simultaneous shape memory property and light-to-thermal energy storage capability

The invention relates to a composite filler of polyimide and barium titanate, a preparation method of the composite filler, a composite dielectric material and a preparation method of the composite dielectric material. The method for preparing the composite filler of polyimide and barium titanate comprises the following steps that the barium titanate is subjected to ultrasonic dispersion in a N,N-dimethylacetamide solution; under the inert gas protection, dispersed barium titanate suspension and 4,4'-diaminodiphenyl ether are mixed; then, pyromellitic dianhydride is added for reaction. The polyimide in the composite filler prepared by the method can be better wrapped at the barium titanate surface to form a core-shell structure using barium titanate as a core and using polyimide as a shell; the conductivity of the composite filler can be improved by the structure.

Composite filler of polyimide and barium titanate, preparation method of composite filler, composite dielectric material and preparation method of composite dielectric material

Multistimuli Responsive and Thermoregulated Capability of Coaxial Electrospun Membranes with Core-sheath Structure and Functional Polypyrrole Layer

The invention relates to the field of materials, in particular to a composite material with both high toughness and high thermal conductivity as well as a preparation method and application thereof and an electronic packaging material. The composite material with both high toughness and high thermal conductivity is prepared from a fiber made of a fiber-forming polymer, carbon nanofibers and an ethylene copolymer, wherein the mass ratio of the fiber made of the fiber-forming polymer to the ethylene copolymer is (1-9):1; the mass of the carbon nanofibers accounts for 5 to 30 percent of the totalmass of the fiber made of the fiber-forming polymer and the ethylene copolymer. The composite material not only has good thermal conductivity, but also has good toughness.

Composite material with both high toughness and high thermal conductivity as well as preparation method and application thereof and electronic packaging material

The invention provides polylactic acid porous film and a preparation method thereof, and mainly relates to the field of waste water treatment. The preparation method of the polylactic acid porous filmhas the advantages that not only is the technology simple, but also the reaction condition is mild, equipment is in common use, and the preparation cost is low; in addition, according to the preparation method, modification treatment is carried out on polylactic acid, so that the prepared polylactic acid porous film has the advantage of large oil absorption amount, and then the polylactic acid porous film has a better purification effect on oily wastewater; therefore, the polylactic acid porous film and the preparation method thereof have important popularization and application value.

Polylactic acid porous film and preparation method thereof

The invention discloses an organic photo-thermoelectric composite material, a preparation method and application thereof, a photo-thermoelectric battery and an optical delay control system, and relates to the technical field of battery materials. The organic photo-thermoelectric composite material comprises a carbon nano tube and an organic polymer loaded on the carbon nano tube, wherein the organic polymer is doped with a dopant. The preparation method of the organic photo-thermoelectric composite material comprises the following steps: mixing the carbon nano tube, the dopant solution and a polymerization monomer to form a reaction mixed solution; and mixing the reaction mixed solution with an initiator, and performing polymerizing. The composite material has good photo-thermal and thermoelectric conversion performances, and compared with a traditional photo-thermal-thermoelectric conversion system, the photo-thermal-thermoelectric conversion capability and efficiency are greatly improved. The photo-thermoelectric battery is prepared from the composite material, and the conversion of photo-thermoelectricity can be more efficiently realized. A control system is formed by utilizing the photo-thermoelectric battery, the delay control is realized by controlling illumination, and the control system has the characteristics of short history list, stable operation, high sensitivity and the like.

Organic photo-thermoelectric composite material, preparation method and application thereof, photo-thermoelectric battery and optical delay control system

Xiao-dong Qi

Papers

Composite filler of polyimide and barium titanate, preparation method of composite filler, composite dielectric material and preparation method of composite dielectric material

Multistimuli Responsive and Thermoregulated Capability of Coaxial Electrospun Membranes with Core-sheath Structure and Functional Polypyrrole Layer

Composite material with both high toughness and high thermal conductivity as well as preparation method and application thereof and electronic packaging material

Polylactic acid porous film and preparation method thereof

Organic photo-thermoelectric composite material, preparation method and application thereof, photo-thermoelectric battery and optical delay control system