Abstract The sizing process is almost invariably performed after the manufacture of carbon fiber (CF) and agent takes effect protecting CF surface. However, traditional not suitable for processing continuous reinforced thermoplastic composites (CFRTPs) with high temperature. In this work, polyetherimide (PEI) chosen as polyetheretherketone (CF/PEEK) composites, content well type (including solvent‐based emulsion type) were systematically researched. After a series characterization surface...

As a kind of metal-organic frameworks (MOFs) which possess large specific surface area and excellent thermal stability, zeolitic imidazolate framework-67 (ZIF-67) shows great application potentials because it can be synthesized in aqueous solutions at room temperature. In this work, we propose synergistic strategy by taking advantages polyetherimide (PEI) ZIF-67 to enhance the interfacial strength carbon fiber (CF) reinforced polyetheretherketone (PEEK) composites via facile route. The bare...

In this paper, a two-dimensional MXene loaded with CeO2 nanoparticles was successfully synthesized through simple solvothermal sintering method. The nanocomposite obtained by mixing the CeO2/Ti3C2Tx paraffin at 30 wt % has high reflection loss of −47.27 dB thickness 1.9 mm and an effective absorption bandwidth up to 4.22 GHz which is higher than that similar absorbing system. By adjusting composition ratio system, almost all S, C, X, Ku bands can be covered. Its excellent performance...

In this study, a simple and rapid grafting method, without damage to carbon fiber (CF), is proposed graft MXene nanosheets onto the surface of CF via covalent bonds through electrochemical aryldiazonium salt reaction using p-phenylenediamine molecule as bridge so enhance interfacial properties CF/epoxy (EP) composites. The morphology, chemical activity wettability modified were characterized by scanning electron microscope, atomic force microscopy, X-ray photoelectron spectroscopy dynamic...

This paper focuses on the transverse tensile and compressive mechanical properties of T800-grade unidirectional (UD) carbon fiber-reinforced polymers (CFRPs). Firstly, tests were conducted UD composite laminates, yielding corresponding stress-strain curves. The results indicated that, for tension, modulus, strength, failure strain 8.7 GPa, 64 MPa, 0.74%, respectively, whereas compression, these values 8.4 197.1 3.43%, respectively. experimental curves brittle under loadings significant...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinding of cephalothin and cefotaxime to D-Ala-D-Ala-peptidase reveals a functional basis natural mutation in low-affinity penicillin-binding protein extended-spectrum .beta.-lactamasesAlexandre P. Kuzin, Hansong Liu, Judith A. Kelly, James R. KnoxCite this: Biochemistry 1995, 34, 29, 9532–9540Publication Date (Print):July 25, 1995Publication History Published online1 May 2002Published inissue 25 July...

Salacia chinensis (SC) is generally known as Saptrangi, which has been used an herb in Ayurvedic medicine and a broad range of biological applications. The current research was planned to develop chinensis-loaded gold nanoparticles (SC-AuNPs) assess the anti-obesity parameters high-fat diet (HFD) treated obese rats. SC-AuNPs were synthesized characterized using UV–visible spectroscopy, SEM, FTIR, EDX, XRD, TEM. Furthermore, bodyweight changes, BMI, adipose index, leptin, resistin,...

The toughening modification of epoxy resin has received widespread attention. addition the second-phase a good effect on resin. In order to investigate interphase composites, in this work interfacial properties carbon fiber (CF)/epoxy with structure were investigated. Methodologies including surface observation, chemical characteristics, energy CF, and micro-phase characterization tested, followed by micro-interfacial performance CF/epoxy composites before after hygrothermal treatment....

Carbon-fiber-reinforced polyimide (PI) resin composites have gained significant attention in the field of continuous-fiber-reinforced polymers, which interfacial bonding between carbon fiber and matrix has been an important research direction. This study designed prepared a water-soluble thermoplastic polyamide acid sizing agent to improve wettability fiber, enhance van der Waals forces strengthen chemical alkyne-capped by introducing alkyne-containing functional groups into agent. found...

In this work, the effect of preheat treatment on surface properties carbon fiber (CF) and interfacial CF‐reinforced polyether ether ketone (CF/PEEK) composites was investigated in detail. The sized T700SC CFs were preheated based practical thermoplastic processing conditions. obvious mass loss obtained due to sizing agent degradation. Fourier transform infrared spectroscopy X‐ray photoelectron demonstrated that concentration agents activated atoms decreased apparently for fibers. Preheat had...

The influence of cooling rate on the mechanical properties resistance-welded continuous carbon fiber/poly-ether-ether-ketone (CF/PEEK) joints and crystallization behavior PEEK in heating elements (HEs) was investigated. 6 kinds with different rates were designed prepared resistance welding processes. A lap shear strength (LSS) improvement 28% reported for lower relative to without controlled process, crystallinity degrees measured by differential scanning calorimetry (DSC) lower-cooling-rate...

Thyroid cancer is the most frequent endocrine tumor with a growing incidence worldwide. However, common diagnostic strategy for thyroid classification hardly to make proper diagnosis in some cases. To assist classical approach, this study used metabolomics screen and validate biomarkers from serum urinary papillary (PTC). Overall, 124 untreated PTC, 76 benign nodule (BTN), 116 healthy control (HC) were collected study. Thirty-six differential metabolites screened non-targeted discovery...

Physicochemical, surface, and mechanical properties of three batches T800 grade carbon fibers (CFs) treated with kinds sizing agents Toray T800H CFs were characterized to study the effect on surface properties. Scanning electron microscopy for morphology, atomic force calculations, results content showed that agent B improved roughness high always presented small in a certain range 1.2–1.6%. Surface energy was calculated by Young's contact angle using test water glycol, angles LY-1...

Objectives Periodontitis is associated with benign prostatic hyperplasia (BPH), whether it related to gut floramicrobiota and metabonomics unclear. Methods We established ligature-induced periodontitis (EP), testosterone-induced BPH, composite rat models. Fecal samples were collected detect microbiota by 16S rDNA sequencing detected liquid chromatography tandem mass spectrometry (LC-MS/MS). Results Sequencing results revealed differential composition between EP+BPH group other three groups....

Abstract The interaction between carbon fiber (CF) and thermoplastic resin presents weakened characteristic, which can be problematic of composites in structural applications. Therefore, it is great significance to research techniques CF surface modification strengthen the interface composites. Herein, based on optimization emulsion composition, polyetherimide (PEI) sizing involving nanotubes (CNTs) was applied enhance CF/polyetheretherketone (PEEK) morphology, chemical energy modified...

Vein identification plays a pivotal role in realizing automatic venipuncture, and it has become difficulty to segment the veins efficiently as well accurately research of full-automatic venipuncture robots. Most studies field vein segmentation have only focused on traditional image processing methods, accuracy generalization performance which are poor. Therefore, we propose an algorithm using U-Net model with attention mechanism (Attention-UNet) can suppress unnecessary features. Besides,...

This study aims to develop a venipuncture robot replace manual ease the heavy workload, lower risk of 2019-nCoV infection, and boost success rates.The is designed with decoupled position attitude. It consists 3-degree-of-freedom positioning manipulator locate needle end-effector that always vertical adjust yaw pitch angles needle. The near-infrared vision laser sensors obtain three-dimensional information puncture positions, while change in force detects state feedback punctures.The...