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无模板插层-剥离勃姆石合成具有优异稳定性的多孔硅掺杂氧化铝二维纳米片

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Science China Materials 2024年第1期67卷 261-271页

作者：赵振祥杨军王春霖薛岩涛吴浩谢威龙吴萍萍王纯正邢伟汪毅庞春霞庞泉德王晓化南军白鹏阎子峰 State Key Laboratory of Heavy Oil Processing CNPC Key Laboratory of CatalysisCollege of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China PetroChina Lanzhou Petrochemical Research Center Lanzhou 730060China Shandong Xinbo Chemical Technology Co. LtdWeifang 262404China Petrochemical Research Institute PetroChina Company LimitedBeijing 100195China CNOOC Tianjin Chemical Research and Design Institute Co. LtdTianjin 300131China

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板... 详细信息

高比表面积和大孔容的多孔氧化铝已被广泛应用在各种领域,但不使用有机模板合成多孔氧化铝仍面临巨大挑战.在此,我们报道了基于插层-剥离策略的多孔氧化铝合成方法,利用硅物种削弱勃姆石(氧化铝前体)的层间作用力,从而在不使用有机模板的情况下将勃姆石剥离成二维纳米片.该合成过程可放大到3 L,并获得厚度为2 nm的二维纳米片.此外,这些二维纳米片可组装成比表面为542 m^(2)g^(-1)和孔容为2.43 cm^(3)g^(-1)的勃姆石.在不同温度下对二维纳米片进行热/水热处理得到的多孔氧化铝其孔结构优于多数有机模板法合成的氧化铝,并表现出优异的吸附性能.本研究为合成二维勃姆石纳米片和多孔氧化铝材料提供了一种新策略.

关键词：多孔氧化铝纳米片模板合成勃姆石水热处理层间作用插层硅掺杂

Structure and Properties of PLA Composite Enhanced with Biomass Fillers from Herbaceous Plants

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Journal of Renewable Materials 2023年第2期11卷 491-503页

作者： Haining Na Juncheng Huang Hongguang Xu Fei Liu Liangke Xie Baoqing Zhu Jiuchen Wang Jin Zhu Key Laboratory of Bio-Based Polymeric Materials of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China weifang Yunding New Material Technology company Limited Weifang262100China Jilin Hwood Technology company Limited Dunhua133712China

PLA composites containing biomass fillers from the three herbaceous plants such as reed,wheat stalk,and coco-nut fiber with length and diameter at the scale of several millimeters were prepared without using additives.The reinforcement effect on the properties of PLA/biomass filler composites is investigated.The research results show that the PLA/biomass filler composites exhibit good stiffness,flexural strength,and impact toughness.Among the three kinds of biomass fillers,reed reinforced PLA composites show optimal mechanical properties.When filled with 40%–50%reed,the flexural moduli of the composites are over 7000 MPa.Flexural strength retains at the same level of pure PLA.The notch impact strength reaches to 4.50±0.73 kJ/m^(2),which is 2.06 times higher than that of pure PLA.Furthermore,the introduction of biomass fillers increases the crystallization ability of PLA and does not increase the water absorption of the composites.This research demonstrated that PLA composites prepared with biomass fillers from the herbaceous plants(namely herb plastic composites,HPCs)is a material with good comprehensive mechanical properties while retaining the intrinsic particularity of biological sources.

关键词： PLA biomass filler herb plastic composites

Inorganic hollow mesoporous spheres-based delivery for antimicrobial agents

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Frontiers of Materials Science 2023年第1期17卷 51-68页

作者： Yunping Qiao Yanyang Han Rengui Guan Shiliang Liu Xinling Bi Shanshan Liu Wei Cui Tao Zhang Tao He Department of Applied Chemistry School of Chemistry and Chemical EngineeringYantai UniversityClearspring RD 3OthLaishanYantai 264005China weifang branch company Shandong Hl-speed Transportation Construction Group Co.Ltd.Qingzhou 262500China Shandong Jinhai Titanium Resources Technology Co. Ltd.Binzhou 256600China

Microorganisms coexist with human beings and have formed a complex relationship with us.However,the abnormal spread of pathogens can cause infectious diseases thus demands antibacterial agents.Currently available antimicrobials,such as silver ions,antimicrobial peptides and antibiotics,have diverse concerns in chemical stability,biocompatibility,or triggering drug resistance.The“encapsulate-and-deliver”strategy can protect antimicrobials against decomposing,so to avoid large dose release induced resistance and achieve the controlled release.Considering loading capacity,engineering feasibility,and economic viability,inorganic hollow mesoporous spheres(iHMSs)represent one kind of promising and suitable candidates for real-life antimicrobial applications.Here we reviewed the recent research progress of iHMSs-based antimicrobial delivery.We summarized the synthesis of iHMSs and the drug loading method of various antimicrobials,and discussed the future applications.To prevent and mitigate the spread of an infective disease,multilateral coordination at the national level is required.Moreover,developing effective and practicable antimicrobials is the key to enhancing our capability to eliminate pathogenic microbes.We believe that our conclusion will be beneficial for researches on the antimicrobial delivery in both lab and mass production phases.

关键词： antimicrobial inorganic hollow mesoporous sphere encapsulate-and-deliver drug delivery

Dose-dependent effects of procyanidin on nerve growth factor expression following cerebral ischemia/reperfusion injury in rats

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Neural Regeneration Research 2008年第4期3卷 390-393页

作者： Feng Li Hai Xie Ying Gao Tongxia Zhan Department of Health Weifang Renmin Hospital Weifang 261041 Shandong Province Chiina Department of Nuclear Medicine Weifang Medical College Weifang 261041 Shandong Province China

BACKGROUND： Recently, grape seed procyanidin （GSP） has been shown to be exhibit antioxidant effects, effectively reducing ischemia/reperfusion injury and inhibiting brain cell apoptosis. OBJECTIVE： To study the effects of GSP on nerve growth factor （NGF） expression and neurological function following cerebral ischemia/reperfusion injury in rats. DESIGN： Randomized controlled study based on SD rats. SETTING： weifang Municipal People＇s Hospital. MATERIALS： Forty-eight healthy adult SD rats weighing 280-330 g and irrespective of gender were provided by the Experimental Animal Center of Shandong University. GSP derived from grape seed was a new high-effective antioxidant provided by Tianjin Jianfeng Natural Product Researching company （batch number： 20060107）. Rabbit-anti-rat NGF monoclonal antibody was provided by Beijing Zhongshan Biotechnology Co., Ltd., and SABC immunohistochemical staining kit by Wuhan Boster Bioengineering Co., Ltd. METHODS： The present study was performed in the Functional Laboratory of weifang Medical College from April 2006 to January 2007. Forty-eight SD rats were randomly divided into the sham operation group, ischemia/reperfusion group, high-dose GSP （40 mg/kg） group, or low-dose GSP （10 mg/kg） group （n = 12 per group）. Ischemia/reperfusion injury was established using the threading embolism method of the middle cerebral artery. Rats in the ischemia/reperfusion model group were given saline injection （2 mL/kg i.p.） once daily for seven days pre-ischemia/reperfusion, and once more at 15 minutes before reperfusion. Rats in the high-dose and low-dose GSP groups were injected with GSP （20 or 5 mg/mL i.p., respectively, 2 mL/kg） with the same regime as the ischemia/reperfusion model group. The surgical procedures in the sham operation group were as the same as those in the ischemia/reperfusion model group, but the thread was approximately 10 mm long, thus, the middle cerebral artery was not blocked. MAIN OUTCOME MEASURES： NGF expression in the ischemic penumbra of the temporal cortex was detec

关键词： procyanidin cerebral ischemia/reperfusion injury nerve growth factor

[Ca^(2+)]_i change in hippocampal neurons influenced by preconditioning of etomidate fat emulsion following cerebral ischemia in rats

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Neural Regeneration Research 2007年第11期2卷 645-648页

作者： Xiuhua Li Er Gao Yan Zhang Division of Cntical Care Medicine Department of Anesthesiology Weifang Medical College Weifang 261042 Shandong Province China

BACKGROUND： It is known that intravenous anesthetic etomidate fat emulsion has cerebral protection. Now many scholars focus on the research of its cerebral protection from molecular biology, but the mechanism of cerebral protection is still fully unclear. OBJECTIVE： To observe the influence of etomidate fat emulsion on the [Ca^2＋]i in hippocampal neurons during the transient cerebral ischemia injury in rats. DESIGN： Randomized controlled observation. SETTING： weifang Medical College. MATERIALS： This study was carried out in the functional laboratory of weifang Medical College between October 2005 and March 2006. Twenty-four male healthy Wistar rats, aged 3 to 4 months, were involved. Etomidate fat emulsion was provided by the limited company of En-hua Medical Bloc in Jiangsu Province （code of H200205l l） and the other agents and materials were provided by Laboratory Center of weifang Medical College. METHODS： The 24 Wistar rats were randomized into 3 groups： sham-operation group, model group and etomidate preconditioning group, with 8 rats in each. Rat models of transient cerebral ischemia injury were made by the ligation of bilateral carotid arteries combined with descending blood pressure in the latter two groups. Before ischemia （ligation of bilateral common carotid artery）, rats in the etomidate preconditioning group were intraperitoneally injected with 12 mg/kg etomidate fat emulsion and then persistently intraperitoneally injected with etomidate fat emulsion at 1.0 mg/kg per minute. Rats in the model group were not administrated. Rats in the sham-operation group were only performed bilateral common carotid artery isolation. When rats were modeled, their brain tissues were quickly taken out and detected. MAIN OUTCOME MEASURES： Change of the fluorescence pixel value of the [Ca^2＋]i in each group by the laser scanning confocal microscope. RESULTS： Twenty-four rats were involved in the final analysis. Fluorescence pixel value in the sham-operation group was in the low level. Fluorescence pixel value i

关键词： etomidate fat emulsions [Ca^2＋]i

Novel transient-energy-based directional pilot protection method for HVDC line

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Protection and Control of Modern Power Systems 2017年第1期2卷 159-168页

作者： Guibin Zou Qiang Huang Shenglan Song Bingbing Tong Houlei Gao Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJi’nanChina. State Grid weifang Electric Power company Weifang 261021China. State Grid Langfang Electric Power company Langfang 065000China.

This paper proposes a novel directional pilot protection method based on the transient energy for bipolar HVDC line.Supposing the positive direction of current is from DC bus to the DC line,in the case of an internal line fault,the transient energies detected on both sides of the line are all negative within a short time,which denotes the positive direction fault;while for an external fault,the transient energy on one end is positive,which means a negative direction fault,but the transient energy on the opposite end is negative,which indicates that the fault direction is positive.According to these characteristics,an integration criterion identifying fault direction is constructed.In addition,through setting a fixed energy threshold,the faulted line and lightning disturbance can also be discriminated.Simulation results from UHVDC transmission system show the validity of the proposed protection method.

关键词： Transient energy HVDC line Directional pilot protection Fault direction Lightning stroke

Model experiment on anti-deformation performance of a self-supporting transmission tower in a subsidence area

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International Journal of Mining Science and Technology 2012年第1期22卷 57-61页

作者： Yuan Guanglin Shu Qianjin Zhang Yunfei Liu Tao Ji Yongsheng Xu Guoan Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering Xuzhou 221008China School of Mechanics&Civil Engineering China University of Mining&TechnologyXuzhou 221008China CXuzhou Power Supply company Xuzhou 221006China Shandong Xinxing Architecture Planning&Design Institute Weifang 261200China

A large number of high-voltage power transmission towers have recently been constructed in mining areas prone to subsidence. In order to ensure the safety of the transmission towers and the safe operation of transmission systems, it is imperative to carry out research on the anti-deformation performance of transmission towers. In our study, we performed experiments on the anti-deformation performance of a transmission tower in a subsidence area on a scale model with a geometric scale ratio of 1:5 and analyzed the failure mechanism of the tower members. The results show that, when the axial distance between two supports changes, destabilization failure most likely occurs in the members of the bottom transverse layer because some parts of the main diagonal member bars yield under the action of compression. The failure mechanism of the tower members basically coincides with the lever principle.

关键词：模型试验变形性能发射塔塌陷区高压输电塔安全运行传输系统破坏机理

Short-term load forecasting based on support vector regression considering cooling load in summer

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Short-term load forecasting based on support vector regressi...

Optimal Configuration of Energy Storage Capacity for Fast Charging Stations Oriented to Electric Taxis

第32届中国控制与决策会议

作者： Li Hu Lei Zhang Tao Wang Kai Li weifang Power Supply company

With the rapid development of the economy and society, short-term load forecasting is becoming increasingly important in power system dispatch and demand response. Firstly, we analyze the daily load characteristics of Jinan in the summer of 2016. Then, a cooling maximum load prediction LS-SVM model is established based on meteorological factors considering accumulated temperature effect. Although the summer load is greatly influenced by meteorological factors, the daily load curves are still similar. Therefore, each point load is calculated by similarity of daily load curve and daily maximum and minimum load. The experimental results prove the effectiveness of the developed prediction algorithm.

关键词： Support vector regression short-term load forecasting cooling load

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Optimal Configuration of Energy Storage Capacity for Fast Ch...