Novel Amphiphilic Polymer Gel Electrolytes Based on PEG-b-GMA-co-MMA

1 Results Gel polymer electrolytes for lithium battery have been widely investigated recently because of their high ion conductivity at room temperature. We synthesized and characterized novel gel electrolytes based on amphiphilic copolymethacrylates containing different lengths of ethylene oxide (EO) chain as ionophilic units and methyl methacrylate (MMA) chain as ionophobic units[1]. Their electrochemical properties were also measured.1H NMR and FTIR analysis results elucidated that PEG-b-glycidyl met...     

某铜厂洗净残渣的浸出工艺条件研究

为处理某火法炼铜厂的洗净残渣，提出了湿法两矿一步法。对本工艺中浸出机理进行了叙述。对此工艺中浸出部分的工艺条件进行了摸索，结果表明：温度、浸出时间、液固比分别为80℃、3h、5时浸出结果较好。在浸出过程中，溶液中铁离子的含量对铜锰的浸出起了至关重要的作用，机理有待于进一步研究，可能由于铁离子在反应中起了催化作用，反应呈现出自催化氧化反应的特征。     

全钒液流电池正极和负极材料的处理方法

为了获得大反应电流,全钒氧化还原液流电池使用聚丙烯腈基碳毡为电极活性材料.在空气中热处理碳毡可以增加其表面含氧官能团浓度,改善碳毡的亲水性,降低反应过电位.实验表明:电池的过电位主要由正极反应造成;热处理正极碳毡可以大大降低电池极化内阻,负极碳毡热处理后降低了析氢过电位,从而降低了电池的电流效率;正极使用热处理后的碳毡,负极使用未经处理的原毡,可以获得更好的电池能量效率.     

浅谈废电池的处理与综合利用

介绍了废电池的种类及其污染危害,分析了国内外废电池处理的现状,论述了几种常见废旧电池处理的新技术和新工艺。     

0.2μm聚焦离子束系统中电源稳定度的研究

为了在所研制的二级透镜聚焦离子束系统中获得直径小于０．２μｍ的稳定束斑，并进行亚微米微细加工，分析了影响束斑大小及稳定性的因素，并着重从像差、散焦和漂移的角度，利用理论分析和模拟计算，研究了决定系统光学性能的离子源、离子引出极、预聚焦极、聚焦极所用高压电源及电对中、消像散透镜、偏转器所用低压电源的稳定度对离子束径的影响，得到了束直径小于０．２μｍ时电源必须达到的稳定度，即高压电源的纹波系数１×１０－４～１×１０－５，低压电源的纹波系数６×１０－４～１×１０－４。     

离子交换树脂催化合成乙酸叶醇酯的研究

本文选用不同型号的苯乙烯系阳离子交换树脂对叶醇的乙酰化反应进行催化， 合成出调香用香原料乙酸叶醇酯， 此外对催化剂的种类以及用量、醇酐比、反应时间等因素进行讨论， 产物最佳收率为９３ ％ ．     

鸡场坪膨润土矿物化性能的测定及其属性划分的研究

膨润土矿尚属本省缺门矿种。本文通过对贵州西部鸡场坪膨润土矿的物化性能测试,对所获得的实际资料进行分析研究,确定了该区矿石的属性及工业价值。经过野外对该区局部地段的地质评价,肯定了该矿的经济价值。鸡场坪嘭润土矿对地方经济的发展具有一定的实际意义。     

简论电的认识史

电的本性,在人类认识的发展过程中,是一部曲折的、辩证的、充满争鸣的历史。本文以简论的形式,从实验发现的角度来说明电的认识经过,阐述实验在电认识史的地位和作用,期望能从前辈科学家的实践活动中,吸取有益的经验和启迪。     

High resolution imaging using scanning ion conductance microscopy with improved distance feedback control

Microscopy is an essential technique for observation on living cells. There is currently great interest in apply scanning probe microscopy to image living biological cells in their natural environment at the nanometer scale. Scanning ion conductance microscopy is a new form of scanning probe microscopy, which enables non-contact high resolution imaging of living biological cells. Based on a scanned nanopipette in physiological buffer, the distance feedback control uses the ion current to control the distance between the pipette tip and the sample surface. However, this feedback control has difficulties over slopes on convoluted cell surfaces, which limits its resolution. In this study, we present an improved form of feedback control that removes the contribution of up to the third order slope from the ion current signal, hence providing a more accurate signal for controlling the distance. We show that this allows faster and lower noise topographic high resolution imaging.