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Synthesis, Characterization of Polyethylene Ionomers and Their Antibacterial Properties

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CHINESE JOURNAL OF POLYMER SCIENCE 2024年第8期42卷 1077-1084页

作者： Wu, Jia-Jia wang, Fei wan, peng-Qi Pan, Li Xiao, Chun-Sheng Ma, Zhe Li, Yue-Sheng Tianjin Univ Sch Mat Sci & Engn Tianjin Key Lab Composite & Funct Mat Tianjin 300350 Peoples R China Chinese Acad Sci Key Lab Polymer Ecomat Changchun Inst Appl Chem Changchun 130022 Peoples R China

Owing to its high production volume and wide range of applications, polyethylene has gained a great deal of attention, but its low surface energy and non-polar nature have limited its application in some important fields. In this study, ethylene/11-iodo-1-undecene copolymers were prepared and used as the intermediates to afford a series of imidazolium-based ionomers bearing methanesulfonate (CH3SO3-), trifluoromethanesulfonate (CF3SO3-), or bis(trifluoromethane)sulfonimide (Tf2N-) counteranions. The tensile test results showed that the stress-at-break (7.8-25.6 MPa) and the elongation-at-break (445%-847%) of the ionomers could be adjusted by changing the counterion species and the ionic group contents. Most importantly, the ionomers exhibited marvelous antibacterial activities against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli). The ionomers bearing Tf2N- exhibited antibacterial activities >99% against both S. aureus and E. coli when ionic content reached 9.1%. The imidazolium-based ionomers prepared in this work demonstrated excellent comprehensive properties, especially high-efficient and broad-spectrum antibacterial ability, exhibiting the potential for the application as the antibacterial materials in packaging, medical, and other fields.

关键词： Polyethylene Ionomer Polymerization catalysis Imidazolium Antibacterial material HALO-ALPHA-ALKENES ETHYLENE COPOLYMERIZATION ISOTACTIC POLYPROPYLENE POLAR POLYOLEFINS CATALYSTS OLEFIN

Water-Driven Malleable,Weldable and Eco-Friendly Recyclable Carbon Fiber Reinforced Dynamic Composites

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Chinese Journal of Chemistry 2024年第5期42卷 516-522页

作者： Ping Yu Qirui Huang Yi wang wan peng Zichen Jia Haiyue wang Juanjuan Ma Chunyu wang Xuzhou Yan School of Environmental and Chemical Engineering Jiangsu Key Laboratory of Function Control Technology for Advanced MaterialsJiangsu Ocean UniversityLianyungangJiangsu222005 China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240 China

Traditional carbon fiber-reinforced polymers based on thermoset matrix have been extensively used in the fields of wind turbine blades,automotive sector,and aerospace,among many ***,there is still a major challenge of recycling those polymers due to the high cost and adverse impacts on the *** this work,we apply a polyimine network as matrix,which possess considerable tensile and thermal properties,to prepare the carbon fiber reinforced polyimine materials with trifluoromethyl diphenoxybenzene units(CFRFP)using a prepreg-based compression molding *** CFRFP can be reshaped or reprocessed by heat or with water rapidly,and exhibited multifunction,including welding,chemical recycling,*** unique findings gained from our study will facilitate the manufacturing capability and enrich the types of fiber-reinforced composites.

关键词： Dynamic chemistry Green chemistry Fiber-reinforced composites Fluoropolyimine Welding Reshaping Recycling Renewable resources

Research Progress of Detection Methods for Microplastics

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Asian Agricultural Research 2024年第3期16卷 29-32页

作者： peng wan Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010010China

Microplastics are plastic particles or fibers with a diameter of less than 5 mm,and they widely exist in the environment and pose potential risks to the ecosystem and human *** detection can provide basic data for formulating effective environmental protection *** this paper,the physical,chemical and biological detection methods of microplastics are reviewed,and the advantages and disadvantages of different methods are *** problems and challenges encountered in microplastics detection are analyzed,and the future research is discussed.

关键词： Microplastics Detection method Research progress

Research Progress of Microplastics Pollution in Environment

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Asian Agricultural Research 2024年第4期16卷 19-22页

作者： peng wan Zhen ZHAO Guoyan WEN Yunshuang FU Cuizhi LI Xiaoli WU Inner Mongolia Yili Industrial Group Co. Ltd.Hohhot 010010China

Microplastics pollution has become one of the focuses of global environmental science *** include micro plastic particles and nano-plastic particles,which come from the decomposition of plastic products,the release of microfibers and the industrial process of plastic *** distribution of microplastics in water,soil and atmosphere is summarized,and the widespread existence of microplastics in different environmental media is *** paper also summarizes the potential impact of microplastics on ecosystems and organisms,and pays attention to the transmission and accumulation of microplastics in the food chain,as well as its potential threat to human ***,the paper discusses the methods and technologies of microplastics treatment and monitoring at present,and puts forward the direction of further research on microplastics pollution in order to formulate more effective management and mitigation strategies.

关键词： Microplastics Environment Pollution

Programmed cell death 1 inhibitor sintilimab plus concurrent chemoradiotherapy for locally advanced pancreatic adenocarcinoma

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World Journal of Clinical Oncology 2024年第7期15卷 859-866页

作者： Shi-Qiong Zhou peng wan Sen Zhang Yuan Ren Hong-Tao Li Qing-Hua Ke Department of Chemoradiotherapy The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina

BACKGROUND Pancreatic adenocarcinoma,a malignancy that arises in the cells of the pancreas,is a devastating disease with unclear etiology and often poor *** advanced pancreatic cancer,a stage where the tumor has grown significantly but has not yet spread to distant organs,presents unique challenges in *** article aims to discuss the current strategies,challenges,and future directions in the management of locally advanced pancreatic adenocarcinoma(LAPC).AIM To investigate the feasibility and efficacy of programmed cell death 1(PD-1)inhibitor sintilimab plus concurrent chemoradiotherapy for *** Eligible patients had LAPC,an Eastern cooperative oncology group performance status of 0 or 1,adequate organ and marrow functions,and no prior anticancer *** the observation group,participants received intravenous sintilimab 200 mg once every 3 wk,and received concurrent chemoradiotherapy(concurrent conventional fractionated radiotherapy with doses planning target volume 50.4 Gy and gross tumor volume 60 Gy in 28 fractions and oral S-140 mg/m2 twice daily on days 1-14 of a 21-d cycle and intravenous gemcitabine 1000 mg/m2 on days 1 and 8 of a 21-d cycle for eight cycles until disease progression,death,or unacceptable toxicity).In the control group,participants only received concurrent *** April 2020 to November 2021,64 participants were finally enrolled with 34 in the observation group and 30 in the control *** Thirty-four patients completed the scheduled course of chemoradiotherapy,while 32(94.1%)received sintilimab plus concurrent chemoradiotherapy with 2 patients discontinuing sintilimab in the observation *** patients completed the scheduled course of chemoradiotherapy in the control *** on the Response Evaluation Criteria in Solid Tumors guidelines,the analysis of the observation group revealed that a partial response was observed in 11 patients(32.4%),stable disease was evident in 19 pa

关键词： Immunotherapy Concurrent chemoradiotherapy Locally advanced pancreatic adenocarcinoma Programmed cell death 1 Sintilimab

考虑热管理约束的柴电混动系统能量再分配策略

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北京理工大学学报 2024年第5期44卷 476-483页

作者：刘波澜李奔万鹏范文浩唐静娴北京理工大学机械与车辆学院北京100081

针对传统能量管理策略缺乏对恶劣工况下热约束的考虑问题,提出了一种能量再分配策略.该策略创建并验证了带有热管理子系统的柴电混动系统模型,并基于邻域分量分析确定了冷却能力指标各自的权重系数,进而得到能够反映系统热状态的综合热... 详细信息

针对传统能量管理策略缺乏对恶劣工况下热约束的考虑问题,提出了一种能量再分配策略.该策略创建并验证了带有热管理子系统的柴电混动系统模型,并基于邻域分量分析确定了冷却能力指标各自的权重系数,进而得到能够反映系统热状态的综合热评价体系.结合热评价体系,提出了基于动量梯度下降法的能量再分配方法.以高海拔和电池冷却系统恶化两种典型工况为例对能量再分配策略进行实时仿真分析,两种工况下该策略均以牺牲较少综合油耗的代价明显改善了系统热状态,保障了车辆的可靠运行.结果证明了考虑热管理约束的能量再分配策略具有良好的效果.

关键词：能量管理混动系统综合热评价体系热管理实时仿真

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胰腺导管腺癌免疫相关基因预后风险模型的构建与评估

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中国医学科学院学报 2024年第3期46卷 354-360页

作者：张昱任瑞平万鹏贺晓兰宁波大学附属人民医院肿瘤放化疗中心浙江宁波315040

目的构建整合胰腺导管腺癌(PDAC)分子亚型和免疫相关基因的风险评估模型。方法以GSE71729数据集(n=145)为训练集,整合PDAC鳞状和非鳞状亚型之间差异表达基因和差异免疫相关基因构建调控网络,筛选发挥主调控鳞状亚型的5个免疫标志基因。... 详细信息

目的构建整合胰腺导管腺癌(PDAC)分子亚型和免疫相关基因的风险评估模型。方法以GSE71729数据集(n=145)为训练集,整合PDAC鳞状和非鳞状亚型之间差异表达基因和差异免疫相关基因构建调控网络,筛选发挥主调控鳞状亚型的5个免疫标志基因。基于患者生存信息和免疫标志基因构建整合免疫评分(IIS)模型来预测PDAC患者的临床预后,并在5个验证集(n=758)中检验其预测效能。结果根据IIS将PDAC患者分为高危组和低危组。在训练集和验证集中,高危组患者的总体生存期均短于低危组(P均<0.001)。多变量Cox回归分析显示IIS是PDAC的独立预后因子(HR=2.16,95%CI=1.50~3.10,P<0.001)。结论IIS可用于PDAC患者的危险分层,并可能成为PDAC潜在的预后标志物。

关键词：胰腺导管腺癌免疫相关基因预后

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商业载人航天器测控通信模式初步构想

载人航天 2024年第2期30卷 233-238页

作者：汤达王志生万鹏北京跟踪与通信技术研究所北京100094

随着商业航天的快速发展与可重复使用等前沿技术应用的逐步成熟,以往以国家行为为主体的载人航天领域已开始积极吸纳商业航天力量融合发展。针对载人航天高可靠性要求与商业航天低成本控制之间的矛盾,梳理分析了现役载人航天器测控需求... 详细信息

随着商业航天的快速发展与可重复使用等前沿技术应用的逐步成熟,以往以国家行为为主体的载人航天领域已开始积极吸纳商业航天力量融合发展。针对载人航天高可靠性要求与商业航天低成本控制之间的矛盾,梳理分析了现役载人航天器测控需求、链路配置与使用模式,在此基础上,综合考虑载人航天传统需求与商业航天特点,提出了标配+选配的测控链路配置模式;针对在轨关键事件与常态化运行场景,设计了中继、对地等传统链路与卫星互联网系统、北斗短报文系统等非传统链路相结合,支持遥测、遥控、图像、话音等多样化业务的载人航天器测控通信模式。相关研究成果可为商业载人航天器测控通信设计提供借鉴参考。

关键词：商业载人航天器测控通信链路配置非传统测控

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智能化在板材下料切割中的应用研究

自动化应用 2024年第S01期65卷 40-43页

作者：万鹏中煤北京煤矿机械有限责任公司北京102400

在现代工业生产中,板材下料切割是制造过程中的重要环节,其效率和精度直接影响产品的质量和生产效率。随着人工智能技术的不断发展,智能化在板材下料切割中的应用越来越广泛。介绍了智能化在板材下料切割中的基本原理,探讨了智能化在板... 详细信息

在现代工业生产中,板材下料切割是制造过程中的重要环节,其效率和精度直接影响产品的质量和生产效率。随着人工智能技术的不断发展,智能化在板材下料切割中的应用越来越广泛。介绍了智能化在板材下料切割中的基本原理,探讨了智能化在板材下料切割中的应用方法,同时分析了其优点和不足之处,提出了未来智能化在板材下料切割中的应用前景和发展方向。

关键词：智能化板材下料切割人工智能技术