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Unleashing the Power of Bio-based Thermotropic Liquid Crystal Modifiers:Toughening and Reinforcing Petroleum-based Epoxy Resin without Compromising Other Properties

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Chinese Journal of Polymer Science 2024年第8期42卷 1093-1102页

作者： Qing-Yun Lu Hong-Wei Gu Jia-Hui Li Qian-Qian Fan Bei-Tao Liu yan kou Xi-Gao Jian Zhi-Huan Weng State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsLiaoning Technology Innovation Center of High Performance Resin MaterialsDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China Thermochemistry Laboratory Liaoning Province Key Laboratory of Thermochemistry for Energy and MaterialsDalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Toughening the petroleum-based epoxy resin blends with bio-based modifiers without compromising their modulus,mechanical strength,and other properties is still a big challenge in view of the *** this study,a bio-based liquid crystal epoxy resin(THMT-E P)with an s-triazine ring structure was utilized to modify a petroleum-based bisphenol A epoxy resin(E51)with 4,4'-diaminodiphenylsulfone(DDS)as a curing agent,and the blended systems were evaluated for their thermal stability,mechanical properties,and flame *** results showed that the impact strength of the blended system initially increased and then decreased with the increase in THMT-EP content,and it reached the a maximum value of 26.5 kJ/m^(2)when the THMT-EP content was 5%,which was 31.2%higher than that of E51/***,the flexural strength,modulus,and glass transition tem perature of the blended system were all simultaneously improved with the addition of *** the same time,the addition of THMT-EP enhanced the flame retardancy of the system by increasing the char yield at 700℃and decreasing the peak heat release rate and total heat release *** work paves the way for a more sustainable improvement in the comprehensive performance of epoxy resin.

关键词： Epoxy resin Toughening Bio-based Thermotropic liquid crystal

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双创教育背景下产教融合在高校课程改革与实践中的应用

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湖北开放职业学院学报 2024年第5期37卷 18-19,22页

作者：寇燕南阳农业职业学院河南南阳日473000

培养应用型、复合型、创新型人才是强国富民的重要举措,是教育现代化建设的价值旨归。借助产教融合举措,推进学校与企业的深度融合,能够切实增进产业发展与课程教学的内在联系,提升高校人才培育的实效性与针对性。而融入创新创业教育理... 详细信息

培养应用型、复合型、创新型人才是强国富民的重要举措,是教育现代化建设的价值旨归。借助产教融合举措,推进学校与企业的深度融合,能够切实增进产业发展与课程教学的内在联系,提升高校人才培育的实效性与针对性。而融入创新创业教育理念与要求,则能进一步深化产教融合的内涵,拓宽产教融合维度,提升高校课程改革与实践的效率。为此,本文结合双创教育与产教融合的内在联系,探究产教融合在高校课程改革与实践中的运行机制与原则,提出科学合理的实践策略,以期全面提升产教融合建设效率,提高高校人才培养的有效性,助推我国社会市场经济的健康发展。

关键词：双创教育产教融合课程改革实践应用

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河南传统文化传承与发展研究

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文化创新比较研究 2024年第9期8卷 51-55页

作者：寇燕安阳师范学院河南安阳455000

习近平文化思想的形成,标志着我们在历史自信、文化自信方面达到新的高度,中华优秀传统文化的传承与发展要自觉以习近平文化思想为指导。该文研究了文化的内涵,讨论了中华优秀传统文化的精神要义,分析了河南传统文化的内容和资源,提出... 详细信息

习近平文化思想的形成,标志着我们在历史自信、文化自信方面达到新的高度,中华优秀传统文化的传承与发展要自觉以习近平文化思想为指导。该文研究了文化的内涵,讨论了中华优秀传统文化的精神要义,分析了河南传统文化的内容和资源,提出了习近平文化思想指导下传统文化传承的指导原则:一是坚定文化自信,挖掘和传承优秀传统文化;二是坚持守正创新,实现传统与现代有机结合;三是秉持开放包容,增强中华文明影响力。最后针对河南传统文化传承与发展工作中的问题提出建设性的意见。

关键词：习近平文化思想河南传统文化文化产业传承发展保护与创新

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Derivation of Lower Critical Magnetic Field for Anisotropic Ginzburg-Landau Model in Superconductivity

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Acta Mathematica Sinica,English Series 2011年第5期27卷 953-982页

作者： yan Lei kou Shi Jin DING Department of Mathematics South China Normal University Guangzhou 510631 P. R. China

In this paper, the authors discuss the vortex structure of an anisotropic Ginzburg-Landau model for superconducting thin film proposed by Du. We obtain the estimate for the lower critical magnetic field Hc1 which is the first critical value of hex corresponding to the first phase transition in which vortices appear in the superconductor. We also find local minimizers of the anisotropic superconducting thin film with a large parameter k, and for the applied magnetic field near the critical field we discuss the asymptotic behavior of the local minimizers.

关键词： Critical magnetic field anisotropic Ginzburg-Landau model vortices

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Internal force and deformation matrixes and their applications in load path

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第8期11卷 563-570页

作者： Qi CHEN Xin-jian kou yan-meng ZHANG Department of Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

This paper deals with the internal force and the deformation matrixes, both of which can be used to analyze the topological relationship of a structure. Based on the reciprocal theorem, the relationship between the two matrixes is established, which greatly simplifies the computation of the internal force matrix. According to the characteristics of the internal force matrix, the transfer law of the matrix itself (due to the removal of components) is established based on the principle of linear superposition. With the relation of the two matrixes, the transfer law of the deformation matrix is also obtained. The transfer law illuminates the change regularity of internal force or deformation of the remnant structure when certain members are cut off one after another. The results of numerical examples show that the proposed methods are correct, reliable and effective.

关键词： Truss structure Redundancy Robustness Topological relationship of structure Removal of members Transfer law

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A novel epoxy methacrylate resin containing phthalazinone moiety for UV coatings

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Chinese Chemical Letters 2007年第5期18卷 598-600页

作者： yan kou Jin yan Wang Xi Gao Jian Department of Polymer Science and Materials Dalian University of TechnologyLiaoning High Performance Resin Engineering Research Center Dalian 116012 China

A novel ohthalazinone modified epoxy acrylate resin for the high temperature resistant ultravioet （UV） curable *** *** methacrylated epoxy resins obtained were utilized to UV radiation curing by taking 2.5% （wt%） of photoinitiator in combination with 20% （wt%） of diluent, and generated the interpenetraring polymer networks. The cured film had good thermal and chemical stability.

关键词： UV curable Epoxy acrylate Phthalazione Crosslinking

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High-performance sandwiched hybrid solid electrolytes by coating polymer layers for all-solid-state lithium-ion batteries

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Rare Metals 2021年第11期40卷 3175-3184页

作者： Zhi-yan kou yan Lu Chang Miao Jie-Qiong Li Cheng-Jin Liu Wei Xiao College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China School of Mechanical MaterialsMechatronic and Biomedical EngineeringAustralian Institute for Innovative MaterialsInstitute for Superconducting and Electronic MaterialsUniversity of WollongongWollongongNSW 2522Australia

Poly(vinylidenefluoride-co-hexafluoropropylene)(P(VDF-HFP))/Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)/P(VDFHFP) sandwiched hybrid solid electrolytes were precisely tailored and successfully fabricated to assemble into allsolid-state lithium-ion batteries,which were systematically evaluated on microstructure,morphology,thermal stability and electrochemical *** sandwiched hybrid solid electrolytes can achieve intimate contact with cathode and anode electrodes to present an excellent interfacial ***,the sandwiched hybrid solid electrolytes possess flexible surface,wide electrochemical working window of 4.7 V,high ionic conductivity of 0.763 mS·cm^(-1) and high thermal stability of 460℃,which may contribute to realizing the practical application in all-solid-state lithium-ion *** assembled cells with the hybrid solid electrolytes can quickly stabilize at a specific discharge capacity of 145.4 mAh·g^(-1) at 0.1 C after only 5 cycles and present admirable rate *** addition,morphology characterizations of the sandwiched hybrid solid electrolytes after long-term cycles show a relatively integrated structure coating with a compact LATP *** investigations afford a promising strategy that the sandwiched hybrid solid electrolytes can overcome the mechanical limitations of the interface between electrodes and inorganic solid electrolytes to provide favorable properties for all-solid-state lithium-ion batteries.

关键词： Sandwiched hybrid solid electrolytes Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) Polymer layer All-solid-state lithium-ion batteries

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Application of unified protocol as a transdiagnostic treatment for emotional disorders during COVID-19: An internet-delivered randomized controlled trial

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World Journal of Clinical Cases 2022年第24期10卷 8599-8614页

作者： kou yan Mohammad Hassan Yusufi Nabi Nazari School of Humanities and Education Xi'an Eurasia UniversityXi'an 710065Shaanxi ProvinceChina Education Administration Bamyan UniversityBamyan 22502Afghanistan Department of Psychology Faculty of Human SciencesLorestan UniversityKhorramabadLorestanIran

BACKGROUND The coronavirus disease 2019(COVID-19)pandemic has been an emotionally challenging time,especially for young *** is associated with a substantial increase in the prevalence of mental health problems,negative symptoms,and stressful experiences that compromise *** low-income countries,internet-delivered psychological services could have a remarkable impact on the population’s mental health,given the lack of mental health *** To investigate the efficacy of internet-delivered cognitive-behavior therapy(CBT)-transdiagnostic intervention for adults with emotional *** In this internet-delivered randomized controlled trial,102 students with an emotional disorder(mean age=28.20 years,standard deviation=5.07)were randomly allocated to receive unified protocol(UP)(n=51)or treatment as the usual *** a semi-structured clinical interview,participants completed an online survey including the Overall Anxiety Severity and Impairment Scale,Overall Depression Severity and Impairment Scale,Difficulties in Emotion Regulation Scale,Positive and Negative Affect Schedule,and Emotional Style *** The participants showed a high degree of *** total,78%(n=40)of the experimental group participants completed the UP *** the intention to treat procedure,the results of the analysis of covariance indicated that participants who received UP showed statistically significant changes in depression symptoms[Cohen’s d=-1.50 with 95%confidence interval(CI):-1.90 to-1.10],anxiety(Cohen’s d=-1.06 with 95%CI:-1.48 to-0.65),difficulties with emotion regulation(Cohen’s d=-0.33 with 95%CI:-0.7 to-0.06),positive affect(Cohen's d=1.27 with 95%CI:0.85 to 1.68),negative affect(Cohen’s d=-1.04 with 95%CI:-1.46 to-0.63),and healthy emotionality(Cohen’s d=0.53 with 95%CI:0.09 to 0.13)compared with the control *** This study’s findings highlight the potential value of transdiagnostic interne

关键词： Unified protocol COVID-19 Internet-delivered Emotion regulation Transdiagnostic Depression Anxiety

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Spatiotemporal phase change materials for thermal energy long-term storage and controllable release

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Journal of Energy Chemistry 2023年第5期80卷 228-236,I0006页

作者： yangeng Li yan kou Keyan Sun Jie Chen Chengxin Deng Chaohe Fang Quan Shi Thermochemistry Laboratory Liaoning Province Key Laboratory of Thermochemistry for Energy and MaterialsDalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China College of Petroleum Engineering Liaoning Petrochemical UniversityFushun 113000LiaoningChina CNPC Research Institute of Petroleum Exploration&Development Bejing 100083China

Phase change materials(PCMs)have attracted much attention in the field of solar thermal utilization recently,due to their outstanding thermal energy storage ***,PCMs usually release their stored latent heat spontaneously as the temperature below the phase transition temperature,rendering thermal energy storage and release uncontrollable,thus hindering their practical application in time and ***,we developed erythritol/sodium carboxymethylcellulose/tetrasodium ethylenediaminetetraacetate(ERY/CMC/EDTA-4Na)composite PCMs with novel spatiotemporal thermal energy storage properties,defined as spatiotemporal PCMs(STPCMs),which exhibit the capacity of thermal energy long-term storage and controllable *** results show that the composite PCMs are unable to lose latent heat due to spontaneous crystallization during cooling,but can controllably release thermal energy through cold crystallization during *** cold-crystallization temperature and enthalpy of composite PCMs can be adjusted by proportional addition of EDTA-4Na to the *** the mass fractions of CMC and EDTA-4Na are both 10%,the composite PCMs can exhibit the optical coldcrystallization temperature of 51.7℃ and enthalpy of 178.1 J/*** supercooled composite PCMs without latent heat release can be maintained at room temperature(10-25℃)for up to more than two months,and subsequently the stored latent heat can be controllably released by means of thermal triggering or heterogeneous *** findings provide novel insights into the design and construction of new PCMs with spatiotemporal performance of thermal energy long-term storage and controllable release,and consequently open a new door for the development of advanced solar thermal utilization techniques on the basis of STPCMs.

关键词： Phase change materials Long-term thermal storage Controllable release Erythritol

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PBL联合翻转课堂在中医内科学临床实习中的应用研究

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中国继续医学教育 2024年第10期16卷 76-80页

作者：王燕丽位珍珍寇焰首都医科大学附属北京中医医院综合科北京100010

目的评价以问题为基础的教学法(problem-based learning,PBL)联合翻转课堂在中医内科学临床实习中的效果。方法选取2021年2月—2023年2月于首都医科大学附属北京中医医院综合科实习的80名学生,随机分为PBL联合翻转课堂组(n=40)与传统... 详细信息

目的评价以问题为基础的教学法(problem-based learning,PBL)联合翻转课堂在中医内科学临床实习中的效果。方法选取2021年2月—2023年2月于首都医科大学附属北京中医医院综合科实习的80名学生,随机分为PBL联合翻转课堂组(n=40)与传统教学组(n=40)。传统教学组采用传统的教学方法,PBL联合翻转课堂组给予PBL联合翻转课堂教学方法。比较2组学生的笔试成绩、学生满意度问卷、参与度评分,评价2种教学方法的教学效果。结果 PBL联合翻转课堂组的总成绩[(88.45±3.93)分]和病例分析成绩[(44.93±2.71)分]高于传统教学组[(82.88±5.99)分、(39.73±4.27)分],差异有统计学意义(P 0.05)。PBL联合翻转课堂组在加深理论知识记忆(100%)、掌握必要临床技能(97.5%)、增强医患沟通能力(97.5%)、提高文献查阅等学习能力(97.5%)、提高中医临床实习兴趣(95.0%)、培养中医临床思维(100%)、对教学方法是否满意(100%)7个维度的满意度均高于传统教学组(60.0%、52.5%、65.0%、50.0%、62.5%、75.0%、67.5%),差异有统计学意义(P <0.05)。学生参与度方面,PBL联合翻转课堂组学生的课前学习及课上表现评分与总成绩呈正相关,差异有统计学意义(P <0.05)。结论 PBL联合翻转课堂在中医内科学临床实习中的应用效果显著,能够提高教学效果,且学生满意度较高。

关键词： PBL 翻转课堂中医内科学临床实习教学法

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