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Chinese Journal of Chemical Engineering 2024年第3期67卷 27-38页

作者： Shanghong Ma Jianbo Qu Haitao Zhang Xiubin Cui Peng Ye qingfei hu Mingzhen Chao State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China Faculty of Light Industry Qilu University of TechnologyShandong Academy of SciencesJinan 250353China

A series of adsorbent materials(WPU-HAx-y)with a three-dimensional porous structure,green sustainability,and excellent performance were prepared and evaluated for the removal of methylene blue using nontoxic and environmentally friendly waterborne polyurethane as the matrix material and humic acid,a biomass material,as the functional *** newly synthesized adsorbents were characterized by infrared spectroscopy,scanning electron microscopy,specific surface area,and *** effects of contact time(0-8 h),starting concentration(10-100 mg·L^(-1)),pH(3-11),solution temperature(30-60℃),and coexisting ions(Ca2+,Na+,K+,Mg2+)on the performance were ***-first-order,pseudo-second-order,elovich,and intra-particle diffusion models were used to analyze the adsorption kinetics;the Langmuir,Freundlich,Temkin,and Dubin-Radushkovich adsorption isotherms were evaluated;and the adsorption behavior of the adsorbent materials was found to be more appropriate for the pseudo-second-order model for chemical pollutant removal than the Langmuir model,which depends on monolayer ***-HA2-3 stood out with a maximum adsorption capacity of 813.0081 mg·g^(-1) fitted to the pseudo-second-order and 309.2832 mg·g^(-1) fitted to the Langmuir model,showing superior adsorption performance and regenerability.

关键词： Porous media Bioenergy Sustainability Waste water

Preparation of waterborne polyurethane/β-cyclodextrin composite nanosponge by ion condensation method and its application in removing of dyes from wastewater

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Chinese Journal of Chemical Engineering 2023年第6期58卷 124-136页

作者： Shanghong Ma Haitao Zhang Jianbo Qu Xiuzhong Zhu qingfei hu Jianyong Wang Peng Ye Futao Sai Shiwei Chen State Key Laboratory of Biobased Material and Green Papermaking Qilu University of TechnologyShandong Academy of SciencesJinan 250353China Institute of Material Science and Technology Qilu University of TechnologyShandong Academy of SciencesJinan 250353China

Currently,polymer nanosponges have received extensive ***,developing new synthetic techniques for novel nanosponges remains a ***,to date,composite nanosponge adsorbents based on waterborne polyurethane(WPU)andβ-cyclodextrin(β-CD)have not been ***,a novel green method,ion condensation method,was developed in this study for the preparation of polymer nanosponge adsorbents for efficient removal of dyes from *** on the principle of charge repulsion between nanoparticles to maintain emulsion stability,waterborne polyurethane/β-cyclodextrin composite nanosponges(WPU-x,y)were prepared by coagulating the emulsions synthesized from 2,2-dimethylolpropionic acid,polypropylene glycol and hexamethylene diisocyanate as raw materials in a mixture of hydrochloric acid and anhydrous *** structure and appearance of WPU-x,y were characterized by attenuated total reflectance Fourier transform infrared spectroscopy,thermal gravimetric analyzer,scanning electron microscope and mercury intrusion *** adsorption capacity of WPU-x,y was tested by parameters such as cross-linking degree,β-CD dosage,contact time,initial dye concentration and p H *** study found that WPU-4,4.62 had the best adsorption effect on methylene blue(MB),the maximum removal rate was 93.42%,and the maximum adsorption capacity was 136.03 mg·g^(-1).Moreover,the Sips isotherm and pseudo-second-order-model were suitable for MB ***,this study provides some perspectives for the fabrication of nanosponge adsorbents.

关键词： Ion condensation Composites Nanomaterials Waterborne polyurethane(WPU) β-Cyclodextrin(β-CD) Adsorption

表面碳化的硅纳米孔柱阵列的H2S室温电容传感特性

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传感技术学报 2012年第1期25卷 1-5页

作者：王海燕王伶俐胡青飞李新建郑州大学物理工程学院材料物理教育部重点实验室郑州450052 郑州轻工业学院技术物理系郑州450002

通过将硅纳米孔柱阵列(Si-NPA)进行高温碳化处理,制备出一种SiC/Si-NPA复合纳米体系。对SiC/Si-NPA的表面形貌和结构表征揭示,生长于Si-NPA上的SiC薄膜由具有立方结构的SiC纳米颗粒组成,厚度为～200 nm。SiC/Si-NPA整体上保持了Si-NPA... 详细信息

通过将硅纳米孔柱阵列(Si-NPA)进行高温碳化处理,制备出一种SiC/Si-NPA复合纳米体系。对SiC/Si-NPA的表面形貌和结构表征揭示,生长于Si-NPA上的SiC薄膜由具有立方结构的SiC纳米颗粒组成,厚度为～200 nm。SiC/Si-NPA整体上保持了Si-NPA原有的柱状阵列结构特征。对浓度介于0～1 200×10-6的H2S气体的室温传感性能测试表明,SiC/Si-NPA对H2S气体的电容响应灵敏度可高达790%,而其对400×10-6浓度H2S气体的响应和恢复时间则分别为170 s和200 s,元件具有较好的测量重复性和稳定性。SiC/Si-NPA可能是一种室温条件下较为理想的H2S气体传感材料。

关键词： H2S气体传感器 SiC 硅纳米孔柱阵列高温碳化

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纳米碳化硅/硅纳米孔柱阵列湿敏性能研究

传感技术学报 2011年第5期24卷 638-641页

作者：王海燕陈红彦胡青飞孟晓波韩昌报李新建郑州大学物理工程学院材料物理实验室郑州450052 郑州轻工业学院技术物理系郑州450002

以硅纳米孔阵列(S i-NPA)为衬底,采用化学气相沉积法分别制备了S iC纳米颗粒/S i-NPA(nc-S iC/S i-NPA)和S iC纳米线/S i-NPA(nw-S iC/S i-NPA)复合体系,并对其表面成分和形貌、室温湿敏性能进行了表征。实验结果表明,nc-S iC/S i-NPA和... 详细信息

以硅纳米孔阵列(S i-NPA)为衬底,采用化学气相沉积法分别制备了S iC纳米颗粒/S i-NPA(nc-S iC/S i-NPA)和S iC纳米线/S i-NPA(nw-S iC/S i-NPA)复合体系,并对其表面成分和形貌、室温湿敏性能进行了表征。实验结果表明,nc-S iC/S i-NPA和nw-S iC/S i-NPA均对水蒸气表现出灵敏的电容响应。当环境相对湿度从11%增加到95%,在100 Hz的测试频率下nc-S iC/S i-NPA的电容增加了750%,而nw-S iC/S i-NPA的电容增加了1050%。通过升湿和降湿动态过程,测得nc-S iC/S i-NPA的响应和恢复时间均为10 s,nw-S iC/S i-NPA的响应和恢复时间分别为100 s和150 s。分析表明,nc-S iC/S i-NPA、nw-S iC/S i-NPA对湿度的高度敏感性主要源于nc-S iC、nw-S iC所引起感应面积的巨大增加,而其较短的响应和恢复时间则归因于阵列结构为水蒸气提供了有效的传输通道。

关键词：湿度传感器 SiC/硅纳米孔柱阵列化学气相沉积

恶意注册近似商标法律规制的域外经验和国内实践

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河南科技 2023年第18期42卷 123-126页

作者：杨颐嘉胡清飞张元祎郑州商标审查协作中心河南郑州450000 河南财经政法大学河南郑州450000

【目的】我国《商标法》前后进行了四次修改,但当前《商标法》的部分规定仍与社会发展状况之间存在差距,导致商标领域仍长期存在恶意抢注、囤积及挟持等问题,这些问题亟待通过借鉴域外经验进行规制。【方法】通过分析恶意注册近似商标... 详细信息

【目的】我国《商标法》前后进行了四次修改,但当前《商标法》的部分规定仍与社会发展状况之间存在差距,导致商标领域仍长期存在恶意抢注、囤积及挟持等问题,这些问题亟待通过借鉴域外经验进行规制。【方法】通过分析恶意注册近似商标法律规制的研究背景、意义、方法及国内外研究现状,明确恶意注册近似商标的法律规制理论基础,梳理我国恶意注册近似商标的法律规制现状及存在问题,并对域外特色制度,如美国意图使用制、日本防护商标制、德国“明显恶意”制等制度进行分析。【结果】针对我国法律规制现状中存在的问题,提出完善建议。【结论】通过落实完善相关制度和措施,遏制恶意注册近似商标行为,促进经济高质量发展。

关键词：恶意注册近似商标法律规制

A novel heat-resistant Al–Si–Cu–Ni–Mg base material synergistically strengthened by Ni-rich intermetallics and nano-AlN_p microskeletons

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Journal of Materials Science & Technology 2019年第3期35卷 306-312页

作者： Kaiqi hu qingfei Xu Xia Ma Qianqian Sun Tong Gao Xiangfa Liu Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University

In this work, nano-AlN particle(nano-AlN_p) microskeletons were introduced into an Al–Si–Cu–Ni–Mg alloy by Al–8 AlN master alloy in which the nano-AlN_p reinforcements connect with each other to form three-dimensional networks. It is found that these nano-AlN_p microskeletons mainly distribute in the binary Al–Si eutectic zones resulting in flaky eutectic Si phases being modified to particulates. Meanwhile,the microskeletons strengthen the matrix synergistically with semi-continuous Ni-rich intermetallics in three dimensions. The tensile mechanical properties, micro-hardness and thermal expansion properties of the alloy at different temperatures are significantly improved. Especially, the ultimate tensile strength(UTS) at 350℃ increases from 85MPa to 106MPa, rising by 24.7%, which is ascribed to nano-AlN_p microskeletons assisting intermetallics with undertaking mechanical loading, and to the modification of eutectic Si phases to reduce the stress concentration at elevated temperatures.

关键词： Al–Si alloy Heat-resistant Al alloy Mechanical properties at high temperatures Nano-AlN_p microskeletons

Coaxial-printed small-diameter polyelectrolyte-based tubes with an electrostatic self-assembly of heparin and YIGSR peptide for antithrombogenicity and endothelialization

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Bioactive Materials 2021年第6期6卷 1628-1638页

作者： Zhiwen Zeng Chengshen hu qingfei Liang Lan Tang Delin Cheng Changshun Ruan Research Center for human Tissue and Organs Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055PR China University of Chinese Academy of Sciences Beijing100049PR China

Low patency ratio of small-diameter vascular grafts remains a major challenge due to the occurrence of thrombosis formation and intimal hyperplasia after *** developing the functional coating with release of bioactive molecules on the surface of small-diameter vascular grafts are reported as an effective strategy to improve their patency ratios,it is still difficult for current functional coatings cooperating with spatiotemporal control of bioactive molecules release to mimic the sequential requirements for antithrombogenicity and ***,on basis of 3D-printed polyelectrolyte-based vascular grafts,a biologically inspired release system with sequential release in spatiotemporal coordination of dual molecules through an electrostatic self-assembly was first described.A series of tubes with tunable diameters were initially fabricated by a coaxial extrusion printing method with customized nozzles,in which a polyelectrolyte ink containing of ε-polylysine and sodium alginate was ***,dual bioactive molecules,heparin with negative charges and Tyr-Ile-Gly-Ser-Arg(YIGSR)peptide with positive charges were layer-by-layer assembled onto the surface of these 3D-printed *** to the electrostatic interaction,the sequential release of heparin and YIGSR was demonstrated and could construct a dynamic microenvironment that was thus conducive to the antithrombogenicity and *** study opens a new avenue to fabricate a small-diameter vascular graft with a biologically inspired release system based on electrostatic interaction,revealing a huge potential for development of small-diameter artificial vascular grafts with good patency.

关键词： Coaxial extrusion printing Electrostatic self-assembly Sequential release Antithrombogenicity Endothelialization

Ample dietary fat reduced the risk of primary vesical calculi by inducing macrophages to engulf budding crystals in mice

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Acta Pharmaceutica Sinica B 2022年第2期12卷 747-758页

作者： huiling Chen Kaiqiang hu Yaru Liang Yuqi Gao Chenye Zeng Kang Xu Xiaojin Shi Liyuan Li Yuemiao Yin Yi Qiao Ying Qiu qingfei Liu Zhao Wang School of Pharmaceutical Sciences Tsinghua UniversityBeijing 100084China Urology Department Peking Union Medical College HospitalBeijing 100730China School of Medicine Tsinghua UniversityBeijing 100084China

Although primary vesical calculi is an ancient disease,the mechanism of calculi formation remains *** this study,we established a novel primary vesical calculi model with D,L-choline tartrate in *** with commonly used melamine and ethylene glycol models,our model was the only approach that induced vesical calculi without causing kidney *** studies suggest that proteins in the daily diet are the main contributors to the prevention of vesical calculi,yet the effect of fat is *** assay the relationship of dietary fat with the formation of primary vesical calculi,D,L-choline tartrate-treated mice were fed a high-fat,low-fat,or normal-fat *** changes in the mouse bladder were detected with transcriptome analysis.A high-fat diet remarkably reduced the morbidity of primary vesical *** fatty acid levels in serum and urine were observed in the high-fat diet group,and more intact epithelia in bladder were observed in the same group compared with the normal-and low-fat diet groups,suggesting the protective effect of fatty acids on bladder epithelia to maintain its normal histological *** analysis revealed that the macrophage differentiation-related gene C-X-C motif chemokine ligand 14(Cxcl14)was upregulated in the bladders of high-fat diet-fed mice compared with those of normal-or low-fat diet-fed mice,which was consistent with histological *** expression of CXCL14 significantly increased in the bladder in the high-fat diet ***14 enhanced the recruitment of macrophages to the crystal nucleus and induced the transformation of M2 macrophages,which led to phagocytosis of budding crystals and prevented accumulation of *** human bladder epithelia(HCV-29)cells,high fatty acid supplementation significantly increased the expression of *** fat is essential for the maintenance of physiological functions of the bladder and for the prevention of primary vesical calculi,whic

关键词： Primary vesical calculi Diet High-fat D,L-Choline tartrate Macrophage CXCL14 Fatty acid Urothelium

Exact Penalty Method for the Nonlinear Bilevel Programming Problem

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Wuhan University Journal of Natural Sciences 2010年第6期15卷 471-475页

作者： PAN qingfei AN Zhonghua QI hui Department of Physics and Mechanics-Electronic Engineering Sanming University Sanming 365004 Fujian China Department of Mathematics and Measure Economics Hu-bei University of Education Wuhan 430205 Hubei China Department of Mathematics and Computer SanmingUniversity Sanming 365004 Fujian China

In this paper,following the method of replacing the lower level problem with its Kuhn-Tucker optimality condition,we transform the nonlinear bilevel programming problem into a normal nonlinear programming problem with the complementary slackness constraint ***,we get the penalized problem of the normal nonlinear programming problem by appending the complementary slackness condition to the upper level objective with a *** prove that this penalty function is exact and the penalized problem and the nonlinear bilevel programming problem have the same global optimal solution ***,we propose an algorithm for the nonlinear bilevel programming *** numerical results show that the algorithm is feasible and efficient.

关键词： convex-quadratic programming nonlinear bilevel programming Kuhn-Tucker optimality condition penalty function method optimal solution

Oldroyd-B黏弹性液滴碰撞过程的数值模拟

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力学学报 2022年第3期54卷 644-652页

作者：关新燕富庆飞刘虎杨立军北京航空航天大学宇航学院北京100191 北京宇航系统控制研究所北京100076

复杂的流变特性使凝胶推进剂的雾化过程存在一定困难,这制约了它的发展.聚合物胶凝剂的加入使凝胶推进剂具有黏弹性,从而在雾化时会产生黏弹性液滴,因此为了进一步认识凝胶推进剂的雾化机理、提高凝胶推进剂的雾化性能,对黏弹性液滴的... 详细信息

复杂的流变特性使凝胶推进剂的雾化过程存在一定困难,这制约了它的发展.聚合物胶凝剂的加入使凝胶推进剂具有黏弹性,从而在雾化时会产生黏弹性液滴,因此为了进一步认识凝胶推进剂的雾化机理、提高凝胶推进剂的雾化性能,对黏弹性液滴的碰撞行为进行数值模拟研究.针对凝胶推进剂雾化过程中出现的液滴撞击现象,考虑流体具有的黏弹性效应,采用流体体积法(VOF)、自适应网格细化技术(AMR)和对数构象张量方法相结合,使用Oldroyd-B本构模型描述液滴的黏弹性,对两个相等体积的黏弹性液滴的碰撞过程进行直接数值模拟,主要关注黏弹性液滴的正撞过程,研究了松弛时间、黏度比、韦伯数对液滴正撞的影响,并对不同参数下黏弹性液滴的撞击过程进行能量计算,另外观察了不同偏心度下的液滴碰撞行为.通过改变撞击速度,得到了合并和反弹的碰撞结果,结果表明增大松弛时间有利于合并液滴的挤压和回缩程度,并且延迟液滴的变形过程,这与牛顿流体得到的结果不同.增大黏度比会阻碍合并液滴的振荡行为,碰撞的偏心程度较大时会出现拉伸旋转,偏心度越大时拉伸距离越长,偏心度越小时动能耗散的速率越快,并且耗散的动能越多.

关键词：液滴碰撞黏弹性数值模拟流体体积法