Defect inspection of braided carbon fiber reinforced polymer (CFRP) is very difficult due to its nonhomogeneity, anisotropy, and sensitivity to coupling agents. This paper presents a hybrid system for detecting microstructure and defects in braided CFRP that combines the advantages of laser-ultrasound and air-coupled ultrasonic testing. Through the finite element method, the ultrasonic field propagating

In order to improve the mechanical properties and solvent resistance of silicone rubber (SR) without its sacrificing insulation, it is proposed to use molybdenum disulfide (MoS2) nanosheets to reinforce the SR. The MoS2 nanosheets were prepared by lithium ion intercalation method, and then the MoS2 was modified with 3-mercaptopropyl trimethoxysilane (KH580) to improve the compatibility and interface

Three-dimensional six-directional (3D6d) braided composites with different braiding angles were prepared, and the influences of temperature and braiding angle on tensile properties and failure mechanisms were studied. The results show that both temperature and braiding angle have significant effects on the tensile properties of 3D6d braided composites. As temperature increases, due to the weakening

Miniaturized electronic devices with high power-density are a key contributor to the booming electronics field, which requires effective heat removal through polymer-based composites. However, their low thermal conductivity remains a great challenge. Herein, we have developed a new Cu-plated PEEK/carbon fiber felt (PEEK/CF-Cu) based e-composite material with excellent heat dissipation properties through

Polymer matrix composites that also contain carbon fiber reinforcement can be given a secondary function in addition to load bearing due to the electrical conductivity of the reinforcing fiber. We investigated how to measure the deformation of a composite by measuring the resistance of the carbon fiber and indicate its current or previous overload. We found that the resistance of the carbon fiber bundle

Molecular dynamics simulations have been performed to explore the effect of intrinsic defects of carbon nanotubes (CNTs) on the mechanical properties of CNTs/polyethylene (PE) composites. Three kinds of defects including single adatom defect, single vacancy defect and an adatom-vacancy pair defect have been considered here. The longitudinal Young's moduli of individual CNTs and CNTs/PE composites with

This paper presents the quasi-static crush performance of newer resin-infused thermoplastic 3D fibre reinforced composites (FRC) under axial load. The main objective is to make an assessment of the energy absorption capability of novel 3D composites for improved energy absorbing applications. Flat specimens of resin-infused thermoplastic (TP) and thermoset (TS) 3D composites with three trigger angles

The increasing demand for low-cost reinforcements emboldens the use of waste byproducts such as chicken eggshells. The chemical composition of the waste eggshell (contains 95% CaCo3) with low density, high hardness, high melting point and its easiest availability makes it a suitable alternative reinforcement to use in the metal matrix composites (MMCs). In this work, the ball-milled and carbonized

In this paper, a novel porous polyetheretherketone-hydroxyapatite (P-PEEK-HA) composite is designed and fabricated by powder mixing-heat press-alkali cleaning method. FTIR and XRD are employed to determine the component and molecular structure of the P-PEEK-HA composite. The porous layer morphology is evaluated using mercury intrusion porosimetry. FTIR and XRD suggest that there are no new crystalline

Organic metal chalcogenides (OMCs) refer to coordination polymers (CPs) with continuous one, two or three dimensional metal-chalcogen (M-X) networks formed by metal nodes and chalcogen atoms from the organic ligands. Among the conductive CPs ever reported, OMCs display superior electrical transport behaviors with conductivities ranging from 10-6 to over 2000 Scm-1, especially those derived from benzenehexathiol

Extra to serving as the reinforcement in polymer-based composites, glass fibres (GFs) are decorated with dense and uniform carbon nanotubes (CNTs) via chemical vapor deposition at a low CNT growth temperature (500 °C). The hairy CNT-decorated GF bundles measure the dynamic variation in electrical resistance using CNT-formed piezoresistive networks in the bundles, with which the resin flow front and

An insightful understanding of the isothermal cold crystallization, melting behavior, and kinetics of the novel PHB-rubber copolymer (PHB-di-rub)-reinforced polylactide (PLA) were determined. Incorporating 10 wt% PHB-di-rub significantly reduces the crystallization half-times (t1/2) by 32-fold, lowers the kinetic parameter (Kg) and folding surface energy (σe), which show the rapid polymer chains folding

Previously, we developed a simple method to fabricate a composite film of a conducting polymer (PEDOT:PSS) and single-walled carbon nanotubes (SWCNTs) that exhibited high thermoelectric performance. In the present work, the carrier density of the composite film was controlled using an electrochemical method. The thermoelectric performances of the obtained composite films were analyzed in terms of their

Herein, three hybrids of metal Phthalocyanine complexes (MPc, M=Ni, Cu, Co) with single-walled carbon nanotubes (SWCNTs) were prepared by ball milling combined with cold pressing method and their thermoelectric (TE) properties were studied. The electrical conductivity of the MPc/SWCNT hybrids remarkably increased with increasing SWCNT content and was higher than the values calculated based on the mixture

Directly, edge-propylene graphitic nanoplatelets (EPGnPs) are made easily using only solid graphite and propylene gas via the mechanical chemistry without additional reactions. The edge-propylene functionalization is confirmed using various analytical techniques (e.g. FT-IR, EA, and TEM). The hydrophobic characteristic and outstanding properties of the EPGnPs make it suitable as a new reinforcing additive

Herein, we prepared Ga doped Ag2Se flexible films on porous nylon membrane. First, Se nanowires (NWs) were wet chemically synthesized, then different amounts of Ga doped Ag2Se (Ag2-xGaxSe, x = 0.01, 0.02, 0.04) NWs were prepared using the Se NWs as templates in solution at 80 °C, and finally the Ga doped Ag2Se films on porous nylon membrane were fabricated by vacuum assisted filtration and then hot

A novel fully bio-based Poly (Glycerol-Itaconic acid) (PGI) was designed and highly efficiently synthesized by solvent-free polycondensation. The Poly (ethylene glycol) (PEG) was used as the phase change material (PCM) working substance and encapsulated by the sustainable PGI supporter. PEG chains were tightly encapsulated with the PGI supporting material mainly under hydrogen bonds due to the structural

In this study, a multiscale cellulose fiber interlayer consisting of chopped flax fibers (FFs) and cellulose nanofiber (CNFs) was proposed for enhancing the interlaminar fracture toughness of carbon fiber/epoxy composites. The cellulose fiber interlayer was treated by waterborne epoxy to improve the interfacial compatibility with the epoxy matrix. The end-notched flexure results showed that the addition

In this paper, we synthesized bionic bone hierarchical porous AlN ceramics which encapsulate polyethylene glycol2000 (PEG2000) to form a new composite phase change material. Argon adsorption and SEM demonstrate that the AlN ceramic has hierarchical structure with most probable diameters of 2.4 nm and 27.3 nm. Raman spectroscopy show that no aluminum vacancies are formed inside the material, which effectively

Over the past decades, poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) has emerged as one of the most attractive conducting polymers for organic electronics. In particular, PEDOT:PSS based composites have demonstrated its high potential as thermoelectrics. In this review, we aim to summarize the latest developments of PEDOT:PSS-based composite materials focusing on PEDOT:PSS/carbon

Flexible and cost-effective MXene-cigarette filter (MCF) based pressure sensors are fabricated by dip-coating cigarette filters with Ti3C2Tx MXene nanosheets in the aqueous dispersion. The resultant MCF sensors exhibit fast response to compression, and show excellent cycling stability (2500 cycles at 10% compression strain) in the radial direction, which is attributed to the highly intrinsic conductivity

The research on the organic hybrid composites have been regarded as important developing direction in the field of thermoelectric fields, which combine the advantages of organic thermoelectric materials and inorganic thermoelectric materials. In this paper, the thermoelectric properties of Tellurium (Te) and Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid composite thin film

A new concept of producing natural rubber (NR) based pressure-sensitive adhesive (PSA) using solid particles relatively at a low-cost as tack enhancer has been proposed. The effect of tack enhancer (i.e., xyloglucan (XG), rice flour (RF), calcium carbonate (CaCO3), and silica (SiO2)) on the adhesion properties of the PSA was investigated. Moreover, stress relaxation, tan δ, initial plasticity (Po)

Thermoelectric (TE) composites are emerging materials with unique capability to directly convert heat to electricity. Poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) has received increasing attention for TE application. Relative to inorganic counterparts, organic polymers and their composites have various advantages of low heat conductivity, element richness and high adjustability

The co-cure manufacturing process effectively merges the various composites parts in wings, fuselage, and frames in aerospace applications. The current study investigates the combined effects of co-cure manufacturing technique and multi-wall carbon nanotubes (MWCNTs) reinforcement on shear strength and fundamental natural frequency of single lap joints (SLJs). In continuation, results were compared

In Resin Transfer Molding (RTM) a dry fibrous reinforcement is placed in a mold and a thermosetting resin system is then injected. Ever faster curing resins have been developed to minimize cycle times. For a thorough process design, the time- and temperature-dependent viscosity behavior needs to be known. However, the short curing times of sometimes less than 2 min often exceed the limitations of conventional

Aniline tetramer-b-polyethylene glycol-b-aniline tetramer (APA), a kind of conjugated triblock copolymer, has attracted attention in the thermoelectric (TE) conversion field owing to its typical n-type property, well-defined molecular structure and excellent dissolvability. Here, APA is used as n-type dopant for tuning the TE properties of the single-walled carbon nanotubes (SWCNTs), and APA/SWCNT TE

Efficient electromagnetic interference (EMI) shielding materials with high flexibility, thin thickness, excellent mechanical property, and superior EMI shielding performance are urgently needed for modern electronic devices in areas of aerospace, military, and wireless communication systems. Herein, highly flexible multi-walled carbon nanotubes (MWCNTs)/aramid fibers (ANFs) composite papers with ordered

Promoting the feasibility of thermoelectric (TE) devices toward wearable power generator application has sparked extensive interest for next-generation electronics. However, the lack of air-stable and high-performance n-type TE materials, which lag far behind those of p-type TE materials, and the deficiency of reasonable device structure design have always restricted the development of wearable thermoelectrics

With the supply of lithium resources beginning to dwindle, rechargeable aqueous zinc-ion batteries (AZIBs) have attracted research interests as alternatives to lithium-ion batteries. Developing high-performance and cost-effective cathodes can promote the commercialisation process of AZIBs. Transition metal-based materials, including different phases of vanadium oxides, manganese oxides and Prussian

Nano-structured membranes with great properties are promising alternatives for water purification. However, it remains a challenge to develop such materials, especially for purifying water contaminated by pathogenic microbes. In this work, a newly-designed nanofibrous membrane with rechargeable biocidal function was prepared through grafting poly(vinyl alcohol-co-ethylene) (EVOH) with poly[5,5-dim

Recently, naturally derived cellulose nanofibers (CNFs) has absorbed abundant of attention due to its renewable, biodegradable, and remarkable performances with high strength, high surface area, and tunable surface chemistry, which permits its interaction with other polymers and nanomaterials in a controlled manner. Hence, the CNFs were employed as the shell nanomaterials to coat the core energetic

A nano-polymer (IL@SiO2) was synthesized by double bond polymerization and creatively applied to polyurethane elastomer (PUE-IL@SiO2). The mechanical properties and energy absorption of PUE-IL@SiO2 at static compression and dynamic impact were studied, respectively. The results show that: compared with pure PUE, the static compressive properties and dynamic impact resistance of PUE with a loading of