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材料科学技术（英文版）
材料科学技术（英文版）

胡壮麟

月刊

1005-0302

jmst@imr.ac.cn

024-83978208

110016

沈阳市沈河区文化路72号

材料科学技术（英文版）/Journal Journal of Materials Science & TechnologyCSCDCSTPCD北大核心EISCI
查看更多>>本刊简称《JMST》，（ISSN 1005-0302，CN 21-1315/TG）。1985年创刊。是中国科协主管，中国金属学会，中国材料研究学会和中国科学院金属研究所联合主办的国际性英文期刊，以“加强国际交流，扩大学术影响，服务经济建设”为办刊宗旨，刊登世界各国的具有创新性和较高学术水平的原始性论文，并设有物约综述、快报、简讯及国内外材料界杰出学者简介等栏目，内容包括金属材料、无机非金属材料、复合材料及有机高分子材料等。
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    Two-dimensional porous zinc cobalt sulfide nanosheet arrays with superior electrochemical performance for supercapatteries

    Yang LiZiyang LuoShunfei LiangHuizhen Qin...
    199-208页
    查看更多>>摘要：Unique two-dimensional (2D) porous nanosheets with overwhelmingly rich channels and large specific surface area exhibit superior electrochemical capacitance performance,as compared to the conventional zero-and one-dimensional counterparts.As ternary transition metal sulfides (TMSs) are well recognized for their high electrochemical activity and capacity,and the replacement of oxygen with sulfur may result in high stability and flexible properties of the nanomaterials,as compared to transition metal oxides,herein we report the synthesis of 2D porous nanosheet arrays of ZnxCo1-xS (x =0,0.25,0.5,0.75,and 1)via a facile hydrothermal process.Due to the synergistic effect of the metal components and a unique 2D porous structure,the Zn0.5Co0.5S electrode was found to stand out as the best among the series,with a high specific capacity of 614 C g-1 at 1 A g-1 and excellent cycle retention rate of 90 ％ over 10,000 cycles at 10 A g-1.Notably,a supercapattery based on a Zn0.5Co0.5S positive electrode and an activated carbon (AC) negative electrode (Zn0.5Co0.5S//AC) was found to display a 1.6 V voltage window,a 61 mA h g-1 specific capacity at 1 A g-1,a 49 Wh kg-1 energy density at 957 W kg-1 power density,and excellent cycling performance (88 ％ over 10,000 cycles),suggesting tremendous potential of Zn0.5Co0.5S in the development of high-performance supercapattery devices.
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    Progress and prospects in chitosan derivatives:Modification strategies and medical applications

    Sheng DingYuanfeng WangJianna LiShiguo Chen...
    209-224页
    查看更多>>摘要：Chitosan (CS) is the only natural alkaline polysaccharide originated from deacetylation of chitin that is the main component of shell from marine organisms.It has great potential medical application due to its broad-spectrum antimicrobial activity and good water solubility originated from its protonated amino groups under acidic condition and abundant hydroxyl groups.However,unprotonated NH2 group of CS leads to its poor solubility under physiological condition and limits its diverse applications.Therefore,it is highly necessary to summarize the modification strategies of CS derivatives systematically to help researchers select the most appropriate strategies for their specific applications.Herein,we have sum-marized the modification strategies of CS derivatives for improving their antimicrobial activity,water solubility,biocompatibility,and mechanical property by chemical reaction and physical integration.And then we have reviewed the CS derivatives in hydrogels,nanoparticles,or coatings for medical applica-tion in wound dressing,drug delivery,medical implant.Last but not the least,we have put forward the future perspectives of deep studies about structure-activity relationship and clinical applications of CS derivatives.
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    Novel antibacterial cellulose diacetate-based composite 3D scaffold as potential wound dressing

    Wencheng LiangMingli JiangJunyong ZhangXiaoming Dou...
    225-232页
    查看更多>>摘要：In this work,novel antibacterial cellulose diacetate/poly(ethylenimine)/hyaluronic acid (CDA/PEI/HA)composite three-dimension (3D) scaffolds were prepared through electrospinning and post-processing.Firstly,CDA/PEI 2D composite nanofiber membranes were prepared by electrospinning,and then the CDA/PEI/HA 3D composite scaffolds were fabricated by post-processing and freeze-drying of CDA/PEI membranes.In particular,HA was added to improve the biocompatibility of composite scaffolds.Com-pared with CDA/PEI scaffolds,CDA/PEI/HA composite scaffolds showed higher water absorbing rate,higher water retention rate and higher mechanical strength.Moreover,CDA/PEI/HA composite scaffolds with abundant positive charge were benefit for improving antibacterial activity.CDA/PEI/HA scaffolds with biology function of HA were benefit for improving hemocompatibility and cell proliferation of CDA/PEI scaffolds.In summary,antibacterial CDA/PEI/HA scaffolds could protect wound from bacterial infection,improve cellular behavior and accelerate wound healing.Thus,CDA/PEI/HA scaffolds could be potential application for wound dressing.
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    Mechanically durable antibacterial nanocoatings based on zwitterionic copolymers containing dopamine segments

    Jingzhi YangHongchang QianJunpeng WangPengfei Ju...
    233-241页
    查看更多>>摘要：Developing an effective and durable antibacterial surface is important for surgical tools and biomedical implants.In this work,a zwitterionic copolymer containing catechol groups as biomimetic anchoring segments was coated onto 316 L stainless steel via drop-casting.Energy-dispersive X-ray spectroscopy(EDS) and water contact angle (WCA) measurements indicated that the coatings made of the copolymers containing zwitterionic and dopamine segments at the molar ratios of 8:2 and 6:4 exhibited stronger stability and mechanical durability than the one at 9:1 after inducing tape-peeling and ultrasonication damage.The mechanically durable nanocoatings exhibited excellent antibacterial performance against Staphylococcus aureus and Escherichia coli in a period of 3 days.The nanocoatings with zwitterionic and dopamine segments at the molar ratio of 8:2 were further evaluated and demonstrated durable antibacterial performance after tape-peeling and ultrasonication treatments.
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    Laser additive manufactured high-performance Fe-based composites with unique strengthening structure

    Hongyu ChenDongdong GuLiang DengTiwen Lu...
    242-252页
    查看更多>>摘要：Steel matrix composites (SMCs),reinforced by ceramic particles,have received a consistent attention in recent years.Using conventional methods to prepare SMCs is generally challenging,and the mechanical properties of conventionally fabricated SMCs are limited.In this study,we successfully fabricated high-performance SMCs by laser powder bed fusion (LPBF) of a composite powder consisting of Fe-based alloy powder and submicron-sized WC particles.The effect of laser energy density on the phase formation,microstructural evolution,overall density and resulting mechanical properties of LPBF-fabricated com-posites was investigated.The present results show that a novel Fe2W4C carbidic network precipitates in the solidified microstructure entailing segregations along the boundaries of cellular sub-grains.The presence of this carbidic network hampers the growth of sub-grains even at elevated temperatures,and hence,stabilizes the grain size though prepared at a broad range of different energy densities.The exact distribution of the Fe2W4C carbides depends on the employed laser energy densities,as for instance they are more uniformly distributed at higher energy input.The density of LPBF samples reaches the maxi-mum value of 99.4 ％ at 150J/mm3.In this parameter set,high microhardness of ～753 HV,compression strength of ～3350 MPa and fracture strain of ～24.4 ％ are obtained.The enhanced mechanical properties are ascribed to less metallurgical defects,higher volume fraction of the martensitic phase and increasing pile-up dislocations resulting from the pinning effect by Fe2W4C carbide.
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