电池隔膜纸

电池隔膜纸摘要随着电池在人们生活中应用的重要性增加，高质量的电池生产越来越受到重视，电池隔膜纸是电池性能的重要影响因素之一，高质量电池隔膜纸的生产就显得尤为重要。

电池隔膜纸是以化学纤维为原料，通常采用湿法造纸的方法生产的一种特种纸，或者说是一种湿法无纺布的生产工艺。

与传统的造纸比较，湿法无纺布的生产有许多其特殊的工艺。

又因为电池隔膜纸的特殊的亲水性要求，采用化学纤维抄造的无纺布，往往要对其进行亲水化的处理。

本论文对电池隔膜纸的生产加工工艺做了一定的研究。

在对电池隔膜纸的生产过程中，化学纤维的分散往往采用较低的浓度，在水介质中加人适量的分散剂及相应的消泡剂等助剂。

最好在水介质中先加入分散剂和消泡剂再加人化学纤维，以促进纤维更好的分散效果，尽量减少分散好的纤维的转移次数和存储时间，并保证浆料输送管道的光滑性减少挂浆。

化学纤维间不存在类似植物纤维的氢键等结合键，只有纤维相互交织在一起，因而，在形成的纸页纤维间没有结合力，导致纸页强度极低，或者说根本不存在强度。

采用皮芯结构的低熔点纤维，在一定的热压条件下，皮层纤维熔化，纤维间相互粘结，提高纸页的强度。

采用分裂纤维和低熔点纤维抄造纸页，纤维配比的改变对纸页的吸收及强度性能有很大的影响。

改变纸页的结构，采用三层抄造纸页的方法，纸页综合性能的提高。

采用面层为100%的低熔点纤维，芯层为40%低熔点纤维与60%分裂纤维的配比抄成的纸页，其性能能够满足电池隔膜纸的要求，由于部分分裂纤维的溶出，导致纸页的碱溶出率较高，只适合于质量较低的电池的生产。

高质量的电池隔膜纸，宜采用100%低熔点纤维抄造的纸页，之后，采用亲水处理的方法对纸页进行处理，常用的亲水处理方法有强氧化剂法，强酸一重铬酸钾溶液处理的方法以及等离子体处理法。

通过实验表明，三种亲水化处理方法都是切实有效的，三种方法各有优缺点，在生产中应用哪种方法要根据具体的条件进行选择。

关键词:电池隔膜纸低熔点纤维分裂纤维抗张强度吸收性能亲水处理夕Study on High Performance Battery Separator of MH-Ni BatteryAbstractAs the increasing usage of the battery in daily life, people pay more attention on high capability battery. And so, the technology of battery producing has been advanced. The battery separator is located between the positive plates andnegative plates so as to provide a separation between the electrodes of opposite charge and an electrolyte reservoir. So the battery separator is one of the most important factors that influence battery capability. Constituted chemical fibers,the battery separator generally produced by wet一laid process. The production is accomplished on traditional paper machine, and the battery separator is called akind of special paper or wet一laid nonwoven. Compared with traditional paper manufacturing process, wet一laid process production of chemical fibers has many special manufacture methods. High required of hydrophilic character, the battery separator made from chemical fibers need to be treated to hydrophili亡.The production method of the battery separator was studied in this paper.The consistence of the stock of chemical fibers should be less than that of the plant fibers，and the dispersion and the deformer should be employed to the stock. We found that it better to add the additives into the water before the addition ofthe fibers.It should decrease the times of the transfer of the stock and ensure the lubricity of the stock piping.The hydrogen bonds，which exist in plant fibers paper, don't exist in the paper that made by chemical fibers. There is only interweavement of chemical fibers, so that, the tensile strength of the nonwoven fabric is very poor. The paper adopt the hot-melt fibers(ES fibers) which is sheath一core structure, at a certain pressure and temperature, the sheath of the fiber was melted and the fibers fused together, so that, the tensile strength of the paper is advanced.The paper is made by the dividable composite fibers(DCF) and ES fibers, the proportioning of the two kinds of fibers effects the absorption and tensile strengthof the paper distinctly. We elevae the allround performance of the paper by changing the structure of the paper, the experiment proved that the three一layers structure paper is functional. The paper, the face一layers of which are made by ES fibers and the core一layer is made by 40% ES fibers and 60% DCF, has a better performance, and it fits for the production of the battery. But the alkali stripping ratio of the paper is a little high.It is better producing the high performance battery separator by 100% ES fibers. Being hydrophobic, the ES fibers paper should be treated to hydrophilic. The usual hydrophilic treating methods are strong oxidizer treatment, strongacid一potassium dichromate treatment and plasma treatment. It is proved that the three hydrophilic treating methods are all efficiency. Every method has its own merit, and the one fitting the circumstances should be selected.Keyword:battery separator paper，light melting fiber，dividable composite fibers, tensile strength，absorption character，hydrophilic treatmentWang HuiliSupervised by Associate Pro. Zhou XiaofanDept. of Paper&Print ScienceNanjing Forestry University目录第一章绪论 (1)1.1MH-Ni电池简介 (1)1.1.1 MH-Ni电池的应用 (1)1.1.2 MH-Ni电池工作原理 (1)1.1.3 MH-Ni电池的结构....................。

(2)1.2 MH-Ni电池隔膜 (2)1.2.1电池隔膜的作用................................ (2)1.2.2 MH-Ni电池隔膜的要求 (3)1.2.3国内MH-Ni电池隔膜的生产现状、研究情况 (3)1.2.4国外MH-Ni电池隔膜的生产现状、研究情况 (3)1.3无纺布隔膜的生产工艺.......................... (4)1.3.1无纺布与造纸........................。

(4)1.3.2湿法非织造布生产与传统造纸方法的区别 (4)1.3.3湿法无纺布生产工艺 (5)1.3.3.1湿法无纺布用纤维.......... . (5)1.3.3.2湿法无纺布生产的纤维分散 (7)1.3.3.3湿法无纺布纸幅的干燥 (7)1.4合成纤维的亲水化处理 (7)1.4.1化学处理法. (7)1.4.2表面辐射改性..................……，..................……，1.4.3等离子体处理 (8)1.5本论文研究的目的、意义及主要内容..................... .. (8)第二章化学纤维湿法无纺布抄造方法的探讨 (9)2.1实验部分 (9)2.1.1实验原料及主要实验仪器 (9)2.1.2实验方法...............，. (9)2.1.2.1分裂纤维的解离..................。