锂离子电池陶瓷隔膜用水性粘合剂的合成研究

Study on the Synthesis for Lithium-ion Battery Ceramic Diaphragm of Water-based Adhesive

以聚合物多元醇、异氟尔酮二异氰酸酯、二羟甲基丙酸和混合丙烯酸酯为主要原料,采用无溶剂预聚体法和丙烯酸酯溶胀聚合的方法,合成具有核壳结构的丙烯酸酯改性水性聚氨酯陶瓷隔膜粘合剂。研究了R值、亲水扩链剂用量、聚合物多元醇种类、聚合物多元醇分子量、PA单体比例、PA玻璃化转变温度对粘合剂性能的影响。结果表明:采用R值为1.2,亲水扩链剂用量为7%,分子量为2000的半结晶型聚酯二元醇,核层聚丙烯酸酯Tg点为40℃,且比例为20%时,合成的陶瓷隔膜粘合剂具有最佳应用性能。采用了纳米粒度仪对乳胶颗粒进行分析,表明采用此工艺合成的的乳胶颗粒为核壳结构。

Use Polymer diol, isophorone diisocyanate, dihydroxymethyxyl and hybrid acrylic are the main raw materials, Methods of solvent pre-polyettes and acrylate bloating polymerization, Ceramic septum adhesive with synthetic nuclear shell structure that acrylate modified water polyurethane. The R value, water dilation agent, the effects of polymer multi-alcohol type, polymer multi-alcohol molecular weight, PA monomer ratio, and PA glassization transformation temperature on adhesives on the application performance. The results show that: The R value is 1.2, and the amount of hydrophilic chain dilation agent is 7 %, a semi-crystal polyester dual alcohol with a molecular weight of 2000, When the Tg of the nuclear layer polyacrylate is 40 ℃, and the proportion is 20 %, The synthetic ceramic diaphragm adhesive has the best performance. Analysis of the nano-granular meter is used, indicating that the product synthesized by this process is a nuclear shell structure.