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

Multifunctional shape memory foam composites integrated with tunable electromagnetic interference shielding and sensing

The invention relates to the field of material preparation and particularly relates to cellulose composite hydrogel for dye adsorption, a preparation method thereof, aerogel and a preparation method thereof. The preparation method of the cellulose composite hydrogel comprises: adding microcrystalline cellulose into an aqueous solution of LiBr, carrying out stirring in an oil bath at 110 to 130 DEGC until the microcrystalline cellulose is completely dissolved so that cellulose hydrogel is obtained, immersing the cellulose hydrogel in a ferric chloride solution, carrying out oscillation until swelling equilibrium so that first hydrogel is obtained, immersing the first hydrogel into a pyrrole monomer, and carrying out oscillation for a reaction until the first hydrogel and the pyrrole monomer are polymerized. The preparation method is easy to operate and has strong feasibility. The cellulose composite hydrogel maximally retains the polypyrrole structure and has excellent dye adsorption performances.

Cellulose composite hydrogel for dye adsorption, preparation method thereof, aerogel and preparation method thereof

Design of super-toughened, heat-resistant and antistatic polyethylene terephthalate-based blend composites by constructing a tenacious interface

Dependence of the dielectric response of PVDF-based nanocomposites on the size of MoS2

Developing multifunctional phase change materials (PCMs) with room-temperature flexibility, moderate photothermal therapy, and antibacterial activity still remains an enormous challenge. In this study, phase change hydrated salts (Na2SO4·10H2O, SSD) were packaged into a sodium alginate (SA) and polyacrylamide (PAM) double-network hydrogel with the addition of [email protected] (MA) nanosheets. The PAM/SA/SSD/MA hydrogels showed high enthalpy (176.0 J/g) and high size retention. Besides, the hydrogel-based sensor exhibited a wide strain sensing range, good sensitivity, and fatigue resistance (800 tensile cycles) due to the robust double-network and electrical [email protected] nanosheets, which can monitor subtle and intense human motion. More importantly, benefiting from the synergetic photothermal effect of MXene and Ag, the hydrogel exhibited good photo-thermal energy storage and antibacterial performances, which can be applied in moderate photo-thermal therapy to relieve pain. This research provides a potential avenue for multifunctional phase change hydrogels toward wearable thermal management and human healthcare devices. 

MXene/Ag doped hydrated-salt hydrogels with excellent thermal/light energy storage, strain sensing and photothermal antibacterial performances for intelligent human healthcare

Xiao-dong Qi

Papers

Multifunctional shape memory foam composites integrated with tunable electromagnetic interference shielding and sensing

Cellulose composite hydrogel for dye adsorption, preparation method thereof, aerogel and preparation method thereof

Design of super-toughened, heat-resistant and antistatic polyethylene terephthalate-based blend composites by constructing a tenacious interface

Dependence of the dielectric response of PVDF-based nanocomposites on the size of MoS2

MXene/Ag doped hydrated-salt hydrogels with excellent thermal/light energy storage, strain sensing and photothermal antibacterial performances for intelligent human healthcare