气相色谱/质谱联用分析橡胶制品喷霜析出物

用气相色谱/质谱联用(GC/MS)对汽车门窗密封条、橡胶手套、白胶板、轮胎等喷霜析出物进行分析。从GC/MS总离子流色谱分析得出,橡胶制品喷霜析出物主要为防焦剂、促进剂、防老剂、防护蜡和硬脂酸等。GC/MS分离效果好,测试效率高,可以较准确地分析橡胶制品的喷霜析出物。     

不同炼胶工艺对半钢轮胎磨耗性能的影响

分析对比不同生产工艺条件下轮胎胎面胶的各项性能,可以看出SSM混炼工艺生产的胎面胶白炭黑和炭黑分散度提升,胶料流动性向好,成品轮胎外观缺陷(花纹圆角、胎冠缺胶等)出现的几率降低;轮胎胎面的疲劳磨耗、胎面的磨损磨耗降低;胎面胶的磨耗体积量,SSM混炼工艺较传统法工艺整体有大幅度降低,相比传统法提升量大于50%。     

Rapid fabrication of microstructure on PMMA substrate by the plate to plate Transition‐Spanning isothermal hot embossing method nearby glass transition temperature

Generally, the hot embossing cycle time for fabricating microfeatures on the surface of polymer takes no <10 min because the mold needs to be firstly heated to 10–40°C above T_g and then cooled to temperature below T_g after certain time of holding pressing force. In this article, the Plate to Plate (P2P) Transition‐Spanning Isothermal Hot Embossing method was proposed, specific of which was relatively short embossing cycle time of 15–60 s by setting and holding constant mold temperature in a narrow temperature interval around T_g in whole cycle of embossing substrate of PMMA. The experiment hot embossing device satisfied the needs of isothermal embossing process was designed and built up, on which the micro V‐cut array with a pitch of 49 µm was successfully fabricated on the PMMA substrate. The experiments gave a confirmation of possibility for fabricating microfeatures by P2P Transition‐Spanning Isothermal Hot Embossing method. POLYM. ENG. SCI., 57:268–274, 2017. © 2016 Society of Plastics Engineers     

全自动挂式除湿袋包装生产线设计

目前挂式除湿袋挂钩组装只能通过手工压合来完成。鉴于此,设计一条全自动包装生产线,可为除湿袋挂钩组装提供一种结构简单、操作方便和生产率高的自动化设备。该生产线采用矩形闭合布局,使挂式除湿袋的包装变得循环紧凑;同时,采用可编辑逻辑控制器(PLC)和人机界面(HMI)对生产线进行有序控制,保证了生产线的可靠性和稳定性。     

原位力学测量仪测试参数修正算法

从试件夹持变形、机体加载变形和同轴度三方面分析各个因素对拉伸测试结果参数的影响量,以试件夹持变形和机体加载变形的修正理论建立了整体的修正算法公式,求出了算法公式的修正系数值。使用典型材料进行拉伸力学试验,经算法修正后得到材料的弹性模量值,与标准试样相差均在5%范围以内,验证了本修正算法的合理性和可靠性。本研究为其它相似结构的测量仪器建立修正算法公式提供了可参考的方法。     

基于CAXA平台的三维数字化人机检测技术研究

为解决产品开发过程中缺乏人机检测手段的问题,本文研究了工业设计过程涉及到的人机工程学内容,提出了一种新的人机检测技术,即在设计软件平台上建立人机检测模型库,用以帮助设计师对其设计进行人机合理性判断,并通过三维建模和软件编程的方法将人机检测模型库移植到数字化设计软件CAXA实体设计中,并且初步实现了这一设想。最后,通过产品实例验证了该技术在设计中的应用。     

Enhanced treatment for cerebral ischemia-reperfusion injury of puerarin loading liposomes through neutrophils-mediated targeted delivery

Nano Research - The recovery of blood circulation following cerebral infarction-associated thrombolysis brings new damage to the brain, which is cerebral ischemia-reperfusion injury (CIRI)....     

基于自适应邻居图的离群点检测方法

离群点检测的目标是识别数据集中与其他样本明显不同的个体,以便检测数据中的异常或异常状态。现有的方法难以有效应对复杂、非线性分布的数据,并且面临参数敏感性和数据分布多样性的问题。为此,现提出一种新型图结构——自适应邻居图,以边为导向,通过迭代的方式对数据进行特征提取,并计算近邻可达度对离群点进行识别,减小了参数的影响,同时可适用于不同分布类型的数据。为了充分验证其性能,将该方法在多个合成与真实数据集上同其他方法进行了比较分析。实验结果表明,该方法在所有19个数据集中平均排名第一,在保持高精度的同时表现出稳定性。     

Boosting Kinetics of Ce3+/Ce4+ Redox Reaction by Constructing TiC/TiO2 Heterojunction for Cerium-Based Flow Batteries

Cerium, a unique rare earth element, possesses a relatively high abundance, low cost, and high redox voltage, making it an attractive candidate for redox flow batteries. However, the sluggish kinetics and corrosion nature of the Ce³⁺/Ce⁴⁺ electrolyte result in overpotential and degradation of carbon felt (CF) electrodes, which hinders the development of cerium-based flow batteries. Therefore, it is essential to develop an electrode with high catalytic activity and corrosion resistance to the Ce³⁺/Ce⁴⁺ electrolyte. Herein, a TiC/TiO₂ coated carbon felt (TiC/TiO₂-CF) electrode is proposed. Remarkably, the TiC/TiO₂ coating effectively minimizes the exposure of the CF to the highly corrosive cerium electrolyte, consequently enhancing the electrode's corrosion resistance. Additionally, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy characterizations reveal the formation of a heterojunction between TiC and TiO₂, which significantly enhances the redox reaction kinetics of the Ce³⁺/Ce⁴⁺ redox couple. Eventually, the practical application of TiC/TiO₂-CF catalytic electrode in a Ce–Fe flow battery is demonstrated. This study sheds light on the synthesis conditions of the TiC/TiO₂-CF electrode, elucidates its heterojunction structure, and presents a novel Ce–Fe flow battery system.