夏季作战靴鞋帮内层功能面料的制备及性能

制备植物中药抗菌黏胶纤维与迭代涤纶纤维混纺抗菌纱;筛选出制备作战靴鞋帮内层鞋头、鞋面部位针织面料所使用的混纺抗菌纱与其他不同功能长丝的最佳配比,以及鞋垫部位植物中药抗菌黏胶纤维与迭代涤纶纤维(60∶40)混合制成的非织造布与迭代涤纶网眼面料复合的最佳配比,并分别对上述不同部位的内层面料进行性能测试。结果表明,最佳配比下的鞋头部位内层面料的顶破强力为728.50 N,透气率为1 182.72 mm/s,透湿量为152.827 g/(m^(2)·h),抑菌率达99.42%;最佳配比下的鞋面部位内层面料的透气率为742.80 mm/s,透湿量为156.183 g/(m^(2)·h),磨损质量损失率为0.002 5 g/cm^(2);最佳配比下的鞋垫部位的内层面料透气率为1 129.39 mm/s,透湿量为199.647 g/(m2·h),接触角为24°,亲水性能良好。

Recent progress in Mg-Li matrix composites

Mg-Li matrix composites are one of the ideal structural materials in the fields of aerospace and military due to their high specific strength and stiffness, good damping and wear resistance, and small thermal expansion coefficient. The preparation technologies of Mg-Li matrix composites including powder metallurgy, pressure infiltration, stir-casting, foil metallurgy, and in-situ synthesis were introduced, and their advantages and disadvantages were compared. The common matrix alloys and reinforcements for Mg-Li matrix composites as well as the structure and performance of typical composites were mainly summarized. Then the interface chemistry between matrix and reinforcement was briefly reviewed. Finally, some problems existing at present and the possible solutions were discussed.

Preparation and performance evaluation of resin-derived carbon spheres for desulfurization of fuels

A polystyrene-based ion-exchange resin was employed as the precursor for preparation of resin-derived carbon spheres （RCSs） through KOH activation with various impregnation ratios. Pore structure, yield and hardness, surface functional groups of the samples and their adsorption performance towards dibenzothiophene （DBT） were investigated. The RCSs with large surface areas （up to 2696 m2/g） and total pore volumes （up to 1.46 cm3/g） exhibited larger adsorption capacities than a commercial ac- tivated carbon, F400. Polanyi-Dubinin-Mane （PDM） model was applied to fit the adsorption data, which proved that micropore filling was involved during the adsorption process. Moreover, a good linear relationship was observed between the ex- tra-micropore volume and adsorption capacity. Intra-particle diffusion （IPD） model was used to describe the kinetic data of DBT onto the adsorbents. The adsorption processes were divided into three stages according to the different diffusion parame- ter. The selective adsorption towards DBT in the presence of competing compounds was also investigated and the high selec- tivity of the RSCs towards DBT may be attributed to the large quantity of acidic oxygen-containing groups.

Bioinspired robust nanocomposites of cooper ions and hydroxypropyl cellulose synergistic toughening graphene oxide

The hierarchical micro/nanoscale layered formation of organic and inorganic components of natural nacre, results in abundant interracial interactions, providing an inspiration for fabricating bioinspired nanocomposites through constructing the interfacial interactions. Herein, we demonstrated the synergistic interfacial interactions of hydrogen bonding from hydroxypropyl cellu- lose and ionic bonding from copper ions upon the reduced graphene oxide based bioinspired nanocomposites, which show the integrated tensile strength, toughness and excellent fatigue-resistant property, as well as high electrical conductivity. These ex- traordinary properties allow this kind of bioinspired nanocomposites to potentially utilize in the fields of aerospace, flexible electronics devices, etc. This study also opens a door for fabricating excellent mechanical performance graphene-based bioin- spired nanocomposites via synergistic interfacial interactions in the future.

Morphology-Controlled Fabrication of Sulfonated Graphene/Polyaniline Nanocomposites by Liquid/Liquid Interfacial Polymerization and Investigation of their Electrochemical Properties

A novel morphology-controlled strategy has been developed to fabricate sulfonated graphene/polyaniline （SGEP） nanocomposites by liquid/liquid interracial polymerization. Sulfonated graphene （SGE） sheets were synthesized and used as both a macromolecular acid dopant and substrate for the polymerization of polyaniline （PANI）, affording the SGEP nanocomposites. The morphology of PAN! in the nanocomposites can be controlled to be either nanorods or nanogranules by varying the synthesis conditions. The morphology of SGEP and the shape of PANI can be tuned by adding an additional dopant and varying the amount of SGE used, and this had a significant influence on the electrochemical performance of the nanocomposites as supercapacitor electrode materials. The SGEP nanocomposite with PANI nanorods exhibited a specific capacitance of 763 F/g with a capacity retention of 96% after 100 cycles and good rate properties. Composites obtained with HCI as an additional acid dopant with two different ratios of SGE to PANI showed higher specific capacitances of 793 and 931 F/g, but lower capacity retention after 100 cycles of 77% and 76%, respectively.