This study reported the fabrication of Ni50 and Ni50-WC coatings while employing laser cladding manufacture (LCM) technique. The surface cross-sectional morphologies, microhardness, phase structure, corrosion, wear resistances were measured using a scanning electron microscope (SEM), stereoscopic microscope, X-ray diffractometer (XRD), microhardness tester, electrochemical workstation, friction tester. These results illustrated emergence γ-(Ni, Fe), WC, W2C, M23C6, M7C3, Ni3Fe phases in...

In this paper, the corn-stalk cellulose (CSC) was extracted from pretreated by immobilized enzyme which prepared using xylanase and laccase. The immobilization rate strongly affected such conditions as carrier concentration carbodiimide (EDC) concentration. structure of CSC characterized Fourier infrared (FTIR). X-ray diffraction (XRD) used to verify crystallinity CSC. 74.13%, increased 25.95% than that corn-stalk. morphologies were confirmed scanning electron microscopy (SEM). experimental...

The potential to create new ecosystems in rivers is possible through the use of reclaimed water as a replenishment source, although long-term effects this method are unknown. In study, quality and aquatic ecological evolution newly constructed river replenished by Beijing (the Jing River) were investigated, conventional quality, phytoplankton indicators, submerged plant growth conditions from October 2018 December 2020 analyzed. Spearman's correlation redundancy analysis between influential...

At present, it is very necessary to select and prepare suitable positive negative electrode materials fabricate high-performance asymmetric supercapacitors. Metal–organic frameworks (MOFs) have garnered significant attention in the energy storage field due their high conductivity. As a branch, zirconium organic framework (UIO-66) promising porous material its large specific surface area abundant Zr centers. Graphene oxide (GO) MXene are as substrate for conducting an MOF active sites...

Abstract In this study, the binding of amine‐based hyperbranched macromolecular polyethyleneimine (PEI) to diatomite (DE) was carried out by using silane coupling agent KH560 (PEI‐KH560‐DE). Fourier infrared spectroscopy, scanning electron microscopy were used characterize structure modified DE. Then, composites prepared PEI‐KH560‐DE as filler in epoxy resin matrix and then cured with dimethylimidazole. The tested for impact resistance, flexural properties, tensile subjected DSC....

Abstract External plasticization is one of the effective ways to toughen epoxy resins. In this study, an inorganic filler (EMD) was prepared by chemical modification diatomite and used fill resin matrix. The effects different amounts (5%, 10%, 15%, 20%) raw (RD) modified‐diatomite on mechanical thermal properties composites were studied. results showed that impact strength, tensile bending strength EMD/EP higher than those RD/EP. EMD‐15/EP reached 5.39 KJ/m 2 , which 36.8% RD‐15/EP....

Corn straw/epoxy resin composites (CS/ECs) and maleic anhydride acetylated CS/ECs (MA-CS/ECs) were prepared through dry mixing high-temperature curing. straw is a kind of abundant, eco-friendly, low-cost biomass material. Unmodified modified corn straws characterized using Fourier transform infrared spectroscopy, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS). The interfacial affinity the composite was testified by contact angle. results XPS SEM demonstrated that...

Due to the sluggish kinetics of sulfur conversion and large volume change lithium anode, along with formation dendrites, lithium-sulfur batteries (LSBs) usually exhibit severe capacity decay poor cycle life. It is necessary consider factors associated cathodes, separators anodes in an integrated manner solve problems existing LSBs. In this paper, a vertically aligned porous carbon decorated transition metal sulfides was introduced between cathode anode comprehensively Widely natural wood...

In this paper, the high-efficiency degradation and alcoholysis recovery of waste polyurethane foam were realized using a combination alkali metal catalyst (CsOH) two-component mixed agents (glycerol butanediol) in different proportions, recycled polyether polyol one-step foaming to prepare regenerated thermosetting hard foam. The agent adjusted experimentally foam, series tests conducted on viscosity, GPC, hydroxyl value, infrared spectrum, time, apparent density, compressive strength, other...

The high reactivity and toxicity of isocyanates do not allow their storage use in one-component system aqueous polymer isocyanate adhesives. Blocked are a solution to protect the groups by blocking with suitable agent. In order obtain eco-friendly systems eliminate effect organic solvents on environment, blocked can be dispersed water using external emulsifier incorporating hydrophilic into backbone. this work, series waterborne polyisocyanate dispersions were prepared anionic modified...

A modified corn straw (CS)/epoxy resin (EP) composite was prepared using bisphenol EP (i.e., E-51) as matrix, 2-methylimidazole curing agent, and CS by 3-glycidyl ether oxypropyl trimethoxysilane (KHCS) filler. Its chemical structure characterized Fourier transform infrared spectroscopy (FTIR). The dynamic thermodynamic properties, mechanical flame retardant property, fracture morphology were studied analysis (DMA), a universal testing machine, micro combustion calorimeter, scanning electron...

Abstract A new soften curing agent for toughening epoxy resins was synthesized by m ‐phenylene diamine modified with epoxypropyl butyl ether. The processes of resin/modified were traced differential scanning calorimetry (DSC), then kinetic parameters, Δ E and n , deduced. Fourier transform infrared (FTIR) analysis showed that the longer reaction time was, smaller absorption peaks group were. results mechanical properties demonstrated impact property resin cured at moderate temperature better...

ABSTRACT A series of imidazole (MI) blocked 2,4‐toluene diisocyanate (TDI) with polyethylene glycol (PEG‐400) as soft segment (PEG‐MI‐ b ‐TDI) were synthesized for toughening and curing the bisphenol type epoxy resin (E‐44). Fourier transform infrared (FTIR) spectrum indicates that NCO groups isocyanate molecule are MI. For systems, elimination group formation urethane bonds studied by FTIR spectroscopy. The results mechanical property shown tensile shear impact strengths neat MI MI‐ ‐TDI...

Abstract In order to make full use of crop waste stalk, corn-stalk cellulose (CSC) was extracted by acid–base method and used as modifier epoxy resin (E51) prepare the self-extracted cellulose/epoxy composites (CSCEC). Differential scanning calorimeter (DSC), thermogravimetry (TG) analysis, dynamic mechanical analysis (DMA), morphology electron microscope (SEM), properties electronic universal testing machine impact were for characterization analysis. The experimental results showed that...

Abstract In this study, a series of sustainable eco‐friendly epoxy resin (EP)‐based biomass composites (DSA‐CS/EP) were prepared using bisphenol A EP as matrix, 2‐methylimidazole curing agent, and corn stalk (CS) esterified with dodecene succinic anhydride (DSA) filler. The static contact angle test results showed that the hydrophobicity CS after esterification DSA (DSA‐CS) was enhanced, which in compatibility DSA‐CS matrix improved. And then, DSA‐CSs dispersed homogeneously without...