软包锂离子电池封装铝塑膜材料保护机理分析及其测试方法

铝塑膜通过对电池内芯的封装形成软包电池,是电池内芯的重要保护材料。铝塑膜是一种多层复合材料,基于铝塑膜的自身特性,可将软包电池做成所需的任意形状,且不同材料的复合使铝塑膜具有良好的耐电解液、热封性、阻隔性、绝缘性及化学稳定性等多种功能,实现了对电池进行有效保护。首先讨论了铝塑膜的保护机理、铝塑膜复合层材料选择、制备工艺方法,并对铝塑膜测试方法进行了论述,最后展望了今后铝塑膜的研发、测试方法设计思路及未来发展方向。     

深冷工况下铝塑膜拉伸性能及抗疲劳性能的探讨

本文研究了室温与-196℃下(基于某产品的防潮层),江苏与瑞典两种不同型号铝塑膜的拉伸性能和抗疲劳性能。试验结果表明，在深冷工况下，江苏铝塑膜的性能作为防潮材料的可靠性优于瑞典铝塑膜的性能。江苏铝塑膜室温下的拉伸性能均优于瑞典铝塑膜；瑞典铝塑膜-196℃下的拉伸性能均优于江苏铝塑膜。江苏铝塑膜与瑞典铝塑膜在-196℃经过5000次曲挠试验后，表面均出现微观缺陷，但曲挠疲劳试验后江苏铝塑膜的拉伸性能基本保持不变，瑞典铝塑膜的拉伸性能略有上升，说明瑞典铝塑膜抗疲劳性能优于江苏铝塑膜。     

铝箔电镀铜和锡的工艺

对铝箔表面进行等离子体清洗并磁控溅射镍铜合金中间层后再电镀,得到了致密、结合力好的铜、锡电镀层.讨论了等离子清洗时的电压、磁控溅射时的负偏压及中间层的合金组成对后续镀层结合力的影响.指出了电镀铜时的电源波形及电镀锡时的温度对镀层性能的影响.采用该工艺制备的覆铜铝箔,其成本仅为普通铜箔的1/4,弱酸性镀锡后镀层的可焊性良...     

甲基磺酸亚锡与硫酸亚锡镀哑光锡的比较

从实验验证、成本分析两个方面对甲基磺酸亚锡和硫酸亚锡为主盐的镀哑光锡电解液在镀液性能和镀层性能进行比较,验证了甲基磺酸亚锡镀哑光锡在镀层和镀液方面的性能优势,在成本上,对甲基磺酸亚锡镀哑光锡和硫酸亚锡镀哑光锡做对比分析,发现二者成本接近,综合研究结论认为:甲基磺酸亚锡为主盐镀哑光锡在未来几年内,有取代硫酸亚锡的趋势。     

动力电池电解液对无卤阻燃增强聚丙稀性能的影响

本文通过分析PP+无卤阻燃剂+玻璃纤维+相溶剂的配方体系,测试该体系耐电解液性能的保持率及相对溶胀率。选用结晶度高的均聚PP,要好于结晶度低的共聚PP;百分之三十的玻璃纤维添加量,耐电解液性能是最好的;经过1000小时的电解液处理,材料的阻燃性能没有明显的变化。     

内墙釉面砖用哑光釉的性能特点

本文综述了内墙釉面砖用哑光釉的种类及性能特点,并详细分析对比了钡质哑光釉和钙质哑光釉在反应动力、烧成温度范围、釉面白度等方面的特性,指出钡质哑光釉更适合制备高档哑光釉,同时对哑光釉的其他工艺性能进行了分析,发现要制备出优质的高档艺术哑光釉,还需优化釉的防污性、可印刷性、耐急冷急热等性能.     

高度有序多孔阳极氧化铝模板制备工艺研究

在酸性电解液中,用二次阳极氧化法制备得到了高度有序的多孔阳极氧化铝(PAA)模板。采用金相显微镜观察了铝箔退火前后的表面形貌,并结合扫描电镜对多孔氧化铝薄膜的结构进行了表征。研究表明,高度有序多孔阳极氧化铝膜的制备依赖于铝箔是否经过预处理、氧化电压的大小、温度的稳定性和电解液的选择等。     

等离子清洗技术对铝合金阳极氧化膜层耐蚀性的影响

通过工艺实验研究,分析了等离子清洗对航空典型铝合金材料硫酸阳极氧化膜层耐蚀性的影响,对等离子清洗后的阳极氧化膜层进行中性盐雾试验。结果表明,该清洗方式不会降低铝合金阳极氧化膜层的耐蚀性能,确保了工件氧化膜层防护的可靠性。     

PET农药专用封口垫片

山东临淄全兴包装材料厂采用铝箔和美国杜邦公司PET农药专用膜、热封胶生产的PET农药专用封口垫片,可有效地防止因内盖封口不严造成的农药外漏和有效成分挥发.此外,这种新型铝塑复合垫片可在铝箔表面印刷商标文字防伪标志,一举解决了老式内盖封口的种种缺陷.     

镁合金新型阳极氧化工艺的研究

采用Na3PO4、Na2WO4、成膜添加剂A及有机胺组成的碱性电解液,对AZ91D镁合金阳极氧化进行研究.结果表明:在无铬、无氟的电解液中,镁合金表面形成的氧化膜光滑致密,具有优良的耐酸碱性,并就电解液中各组分在成膜过程中的作用及电解工艺参数对成膜过程和膜层性能的影响进行了探讨.     

铝材表面的等离子微弧氧化技术研究

以工业级硅权钠为电解液,铝材在交流电压作用下进行等离子微弧氧化反应,电压升高,膜厚增大。用Ｘ－射线衍射分析法和扫措是镜法检测,氧化膜９为非晶态氧化铝陶瓷膜。硬度试验和腐蚀试验表明;该膜硬度高、耐强碱腐蚀性强。     

Chemistry of the Interface Between Aluminum and Polyester Films

It has been observed that the adhesion between vacuum-evaporated aluminum and poly(ethylene isophthalate-co-ethylene sodium sulfoisophthalate) copolymer is approximately five times greater than the adhesion between vacuum-evaporated aluminum and biaxially-oriented poly(ethylene terephthalate) film. To describe the interface between the aluminum and these polymeric substrates, thermoanalytical, spectroscopic and microscopic techniques have been applied. Definite changes in surface elemental composition and chemical functionality occur upon metallization of the polymer films. Aluminized samples contained two new oxygen functionalities; one due to the aluminum oxide and the other due to an organoaluminum species. Thermal degradation, as may occur during vacuum evaporation, would be expected to yield a carboxylic acid endgroup and a vinyl endgroup for each chain scission reaction that occurred. Reaction of aluminum with these carboxylic acid endgroups is thought to be responsible for the organoaluminum oxygen peak that was observed. Based on the XPS data, however, the level of this new functionality was comparable for both types of polyester film. Thus, this new functionality may be involved in promoting aluminum/polyester adhesion, but by itself cannot explain the differences in the level of adhesion that are attained. It appears, based on the transmission electron micrographs, that the aluminum deposit penetrates the copolymer coating to a greater depth than it does the PET. The greater level of penetration could be responsible for the greater adhesion obtained between vacuum-evaporated aluminum and the copolymer film compared with the level of adhesion obtained with the PET film. Based on this work, it appears that the adhesion of the vacuum-evaporated aluminum to both polyesters has a similar chemical component (type and amount) but a different extent of the mechanical component.     

Chemistry of the Interface Between Aluminum and Polyester Films

It has been observed that the adhesion between vacuum-evaporated aluminum and poly(ethylene isophthalate-co-ethylene sodium sulfoisophthalate) copolymer is approximately five times greater than the adhesion between vacuum-evaporated aluminum and biaxially-oriented poly(ethylene terephthalate) film. To describe the interface between the aluminum and these polymeric substrates, thermoanalytical, spectroscopic and microscopic techniques have been applied. Definite changes in surface elemental composition and chemical functionality occur upon metallization of the polymer films. Aluminized samples contained two new oxygen functionalities; one due to the aluminum oxide and the other due to an organoaluminum species. Thermal degradation, as may occur during vacuum evaporation, would be expected to yield a carboxylic acid endgroup and a vinyl endgroup for each chain scission reaction that occurred. Reaction of aluminum with these carboxylic acid endgroups is thought to be responsible for the organoaluminum oxygen peak that was observed. Based on the XPS data, however, the level of this new functionality was comparable for both types of polyester film. Thus, this new functionality may be involved in promoting aluminum/polyester adhesion, but by itself cannot explain the differences in the level of adhesion that are attained. It appears, based on the transmission electron micrographs, that the aluminum deposit penetrates the copolymer coating to a greater depth than it does the PET. The greater level of penetration could be responsible for the greater adhesion obtained between vacuum-evaporated aluminum and the copolymer film compared with the level of adhesion obtained with the PET film. Based on this work, it appears that the adhesion of the vacuum-evaporated aluminum to both polyesters has a similar chemical component (type and amount) but a different extent of the mechanical component.     

微弧氧化电解液配方改良的初步研究

微弧氧化技术由于电解液的稳定性而需要进行配方改进。本文针对电解液混浊的原因加入EDTA和SDBS作为稳定剂。采用增重法测量氧化成膜速率，络合滴定法测量电解液中铝的含量，并对膜层的性能进行测试。结果表明，这2种稳定剂的加入可以延长电解液的使用寿命，提高其成膜速率，不影响膜层的耐蚀性和硬度。     

电流密度对铝合金瓷质阳极氧化膜性能的影响

在草酸钛钾电解液中采用恒流模式对铝合金进行瓷质阳极氧化处理,研究了电流密度对瓷质阳极氧化膜的耐蚀性、厚度以及硬度的影响。结果表明:随着电流密度的增加,瓷质阳极氧化膜的耐蚀性、厚度以及硬度都有所提高;当电流密度为2.5A/dm2时,瓷质阳极氧化膜的耐蚀性最佳,厚度最大。     

压铸铝合金防护技术在装备中的应用

介绍了压铸铝合金镀锌彩钝和无色化学氧化工艺.分析了镀锌层附着力差、耐蚀性差的原因,并给出了解决办法.经测试,镀锌彩钝膜附着力和耐蚀性均合格,压铸铝合金无色化学氧化膜的耐蚀性合格.     

阳极氧化铝的表面参数对硅酮结构的装锒密封胶长期黏结性的影响(连载一)

硅酮密封胶对阳极氧化铝的黏结质量千差万别.影响黏结性的关键因素是铝材表面的封孔程度、氧化层的着色情况、清洁剂的特性以及基材表面清洁与打胶之间允许的时间间隔.由于清洁剂将有机污染物从阳极氧化铝表面去除的效果不同,所以此效果并不和黏结质量有必然联系.据猜测,吸附在阳极氧化铝表面的清洁溶剂会改善基材表面从而提高硅酮胶的黏结性,但这种改善效果会随着清洁溶剂随时间的的挥发而降低.对于给定的溶剂,最佳的黏结效果取决于材料表面的封孔程度.依照ISO 2143酸刻蚀方法测量材料表面的封孔程度,可以预测未着色的阳极氧化铝基材的黏结性.对于着色的阳极氧化铝表面,依照ISO 2931的测试标准,用电相位漂移方法可以用来预测黏结质量.一种控制阳极氧化铝表面的方法被提了出来,此方法是测量不同频率下基材的电阻抗并将它成功地和硅酮密封胶与该材料表面的长期黏接性联系起来.     

Adhesion enhancement of thermally evaporated aluminum to surface graft copolymerized poly(tetrafluoroethylene) film

Surface modifications of Ar plasma-pretreated poly(tetrafluoroethylene) (PTFE) film via UV-induced graft copolymerization with glycidyl methacrylate (GMA) and 1-vinylimidazole (VIDz) were carried out to improve the adhesion with evaporated aluminum metal. The surface compositions of the graft copolymerized PTFE films were studied by X-ray photoelectron spectroscopy (XPS). The adhesion strength of the evaporated aluminum to the surface graft copolymerized PTFE film was affected by the type of monomer used for graft copolymerization, the graft concentration, the plasma post-treatment of the graft copolymerized PTFE surface prior to metallization, and the extent of thermal treatment after metallization. The optimum T-peel adhesion strengths of the Al/PTFE laminates were in excess of 10 and 5 N/cm, respectively, for the GMA and VIDz graft copolymerized PTFE films. These adhesion strengths are significantly higher than those obtained between the evaporated aluminum and the pristine or plasma-pretreated PTFE film. The mechanism of adhesion enhancement and the failure of the metal-polymer assembly were also investigated. It was observed that the failure occurred within the PTFE film. The strong adhesion between Al and PTFE arises from the charge-transfer interaction between the Al atom and the epoxide moiety of the grafted GMA polymer, as well as from the fact that the graft chains are covalently tethered on the PTFE film surface as a result of the grafting process.     

聚氨酯包覆铝片红外性能研究

通过对原始粉的研磨、聚氨酯包覆,制备出包覆铝片,然后加入聚氨酯清漆里,制备低红外发射率漆膜。研究表明,在8～14μm波段红外窗口,其红外发射率达到0.41,与添加没有包覆铝片漆膜红外发射率相近,但漆膜的物理化学性能有明显的提高,其耐候性优异。同时研究了包覆铝片的径厚比和含量对漆膜的红外发射率影响,当铝片的尺寸为50～70μm,径厚比为30～35,含量为35%(质量百分比)时,漆膜红外发射率最低。     

高效抗污卷铝涂料的研制

通过对各个原材料的深度筛选,合理搭配,研制出高效抗污卷铝涂料。着重研究了主体树脂的改性及各种助剂的应用,制得的涂料具有高效抗污性和抗菌性,同时漆膜具有优异的附着力、机械加工性、耐化学品性和耐腐蚀性,特别适合用于室内外装潢、幕墙、天花吊顶等场合。