With Ag-loading MWNTs antibacterial agent as functional material, the antibacterial wool fibers were prepared by ultraviolet irradiation method. The morphologies of the samples were observed by scanning electron micro...
详细信息
With Ag-loading MWNTs antibacterial agent as functional material, the antibacterial wool fibers were prepared by ultraviolet irradiation method. The morphologies of the samples were observed by scanning electron microscopy. The structures of specimens were characterized by X-ray diffraction. Moreover, the mechanical properties, thermal stability and antibacterial wash-resistant properties were measured. The results showed that a compact antibacterial lay was coated on the surface of antibacterial wool fiber;compared with original wool fiber, the crystallization index, the force, the strength and the thermal stability were increased, but the elongation was decreased;it exhibited excellent antibacterial properties against *** after repeated washing (at least 20 times).
Carbon microspheres(CMSs) were oxidized by a mixture of concentrated sulfuric and nitric acids. Then oxidized CMSs were modified by 3-methacryloxypropyl trimethoxysilane. The morphologies and microstructures of all sa...
详细信息
Carbon microspheres(CMSs) were oxidized by a mixture of concentrated sulfuric and nitric acids. Then oxidized CMSs were modified by 3-methacryloxypropyl trimethoxysilane. The morphologies and microstructures of all samples were characterized by fourier transformation infra-red spectrometry, field emission scanning electron microscopy, X-ray photoelectron spectroscopy and thermogravimetry. The results indicate that oxygen-containing groups and KH-570 were successfully grafted on the surface of CMSs after oxidation and silanization treatment, which resulted in a much improved dispersion of CMSs in ethanol. This lays an experimental foundation for the further functionalization of CMSs.
With Ag/MWNTs antibacterial agent as functional material, antibacterial wool fiber was prepared by the method of ultraviolet irradiation. The morphologies of samples were observed by scanning electron microscopy. The ...
详细信息
With Ag/MWNTs antibacterial agent as functional material, antibacterial wool fiber was prepared by the method of ultraviolet irradiation. The morphologies of samples were observed by scanning electron microscopy. The structures of specimens were characterized by Fourier transformation infrared spectrum. Moreover, the characteristics of wool fiber were measured before and after antibacterial treatments. The results show that wool fiber could firmly combine with the Ag/MWNTs composite which had excellent antibacterial effect. Furthermore, an antibacterial layer was formed on the surface of wool fiber by covalent bonding through the bridge action of coupling agent. Compared with original wool fiber, the Ag/MWNTs-wool fiber was longer and thinner with higher crimp recovery and crimp elasticity.
Achiral diacetylene 10,12-pentacosadinoic acid (PCDA) and a chiral low-molecular-weight organogelator could form co-gel in organic solvent and it could be polymerized in the presence of Zn(II) ion or in the correspond...
详细信息
Achiral diacetylene 10,12-pentacosadinoic acid (PCDA) and a chiral low-molecular-weight organogelator could form co-gel in organic solvent and it could be polymerized in the presence of Zn(II) ion or in the corresponding xerogel under UV-irradiation. Optically active polydiacetylene (PDA) were subsequently obtained. Supramolecular chirality of PDA could be controlled by the chirality of gelators. Left-handed and right-handed helical fibers were obtained by using Land D-gelators in xerogels respectively, and CD spectra exhibited mirror-image circular dichroism. The PDA in xerogel exhibited typical blue-to-red transition responsive to the temperature and pH, while the supramolecular chirality of PDA showed a corresponding change.
In order to improve wear resistance of parts, a Ni-Cr-B-Si alloy coating was prepared on 15 CrMo steel surface by pre-placing a Ni-Cr-B-Si alloy powder layer of 0.4 mm in thickness using flame spraying and then meltin...
详细信息
In order to improve wear resistance of parts, a Ni-Cr-B-Si alloy coating was prepared on 15 CrMo steel surface by pre-placing a Ni-Cr-B-Si alloy powder layer of 0.4 mm in thickness using flame spraying and then melting the layer by micro-beam plasma arc (MBPA). The interface of the coating to substrate, microstructure, composition distribution, micro-hardness, wear and corrosion resistance of the Ni-Cr-B-Si cladding layer and substrate were examined. The results show that the Ni-Cr-B-Si cladding layer is compact with a good metallurgical bonding to substrate. Under optimizing process parameters, a large number of equiaxed grains are observed on the surface of the cladding layer. The micro-hardness from substrate to cladding layer exhibits step distribution. As compared with the base metal, the micro-hardness of cladding layer increases obviously by about 3 times. The electrochemical test results show that the corrosion resistance of the Ni-Cr-B-Si alloy cladding layer in 3.5% NaCl solution is significantly higher than that of the base metal.
Generally,a microemulsion consists of oil,water,surfactant and sometimes ***,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular s...
详细信息
Generally,a microemulsion consists of oil,water,surfactant and sometimes ***,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional *** phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase *** electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） *** sizes of the microemulsion droplets are in the range of 20-50 nm.
Bamboo-shoot-like oriented carbon micromaterials(BOCMs)were synthesized by a solvothermal method at 450°C for 4 h using deoiled asphalt(DOA)as carbon source,toluene as solvent,ferrocene as catalyst precursor and ...
详细信息
Bamboo-shoot-like oriented carbon micromaterials(BOCMs)were synthesized by a solvothermal method at 450°C for 4 h using deoiled asphalt(DOA)as carbon source,toluene as solvent,ferrocene as catalyst precursor and amphiphilic triblock copolymer P123 as *** morphology and structure of the products were characterized by X-ray diffraction,field emission scanning electron microscopy,high resolution transmission electron microscopy and Fourier transform infrared *** results reveal that the obtained products have good distribution with uniform diameters of about 0.5 ?m and the lengths of 1-1.5 μm,and hydrogen-carbon bonds are observed on the surface of *** growth mechanism of BOCMs is discussed,in which that the catalysis of ferrocene and the dispersion and assembly of the aromatic molecules of DOA directed by P123 are critical to the formation of the *** coercivity value(231.91 Oe)from the measurement of a vibrating sample magnetometer shows that the BOCMs have an obvious ferromagnetic behavior.
The adsorption of cysteine molecule on intrinsic and Pt-doped graphene sheets was studied by density functional theory calculations. Compared with the intrinsic graphene, Pt-doped graphene strongly adsorbs cysteine mo...
详细信息
暂无评论