CN112054147A - 一种应用于锂电池隔膜的复合膜材料的制备方法 - Google Patents
一种应用于锂电池隔膜的复合膜材料的制备方法 Download PDFInfo
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Abstract
本发明公开了一种应用于锂电池隔膜的复合膜材料的制备方法,主要包括:将聚酯多元醇、乙二醇、丁酮和甲苯二异氰酸酯在60~80℃,在N2保护条件下反应3~6h,得到预聚体;然后在预聚体中加入2,2‑二羟甲基丙酸进行扩链;扩链完成后加入三乙胺进行中和,再加入水乳化,最后的到水性聚氨酯乳液;将EVOH(聚乙烯‑乙烯醇)在强极性溶剂中溶解,配置成EVOH溶液;将以上两种溶液采用静电纺丝对喷的方法制备出所述复合膜。制备出的水性聚氨酯/EVOH纳米纤维复合膜材料,具有稳定性好,热尺寸收缩率小,拉伸强度大,吸液率高等优点,可以作为锂离子电池隔膜材料使用。
Description
技术领域
本发明属于膜材料制备领域,具体涉及一种应用于锂电池隔膜的复合膜材料 的制备方法。
背景技术
锂离子电池由于具有功率密度高、自放电率低、无记忆效应和放电电压稳定 等优点已逐渐成为研究的热点。隔膜材料作为电池的主要组成部分,对实际电池 性能有着至关重要的影响。电池隔膜必须是电子的非良导体但也要允许电解质离 子通过,并具备良好的化学、电化学稳定性对电解液保持高度浸润性,同时必须 具有一定的机械性能从而能够承受电池组装过程中的高张力。目前,商业化锂离 子电池隔膜大都采用聚烯烃高聚物拉伸成孔制得,但该方法制得的隔膜孔隙率和 吸液率较低,不能满足较大电流充放电的需要。
水性聚氨酯是以水作为分散介质的新型PU体系,又称水分散聚氨酯、水基 聚氨酯或者水洗聚氨酯。水性聚氨酯以水作为溶剂,有着安全可靠、无污染、相 容性较好等优点,是良好的电子绝缘体。将水性聚氨酯利用流延成膜法制备成的 薄膜相比较聚烯烃隔膜材料,有着优异的热稳定性、绿色环保、相容性较好、不 易燃烧等特点,有望成为新型锂离子电池隔膜材料。但该种薄膜在力学性能等方 面有所欠佳。EVOH是一种由乙烯和醋酸乙烯共聚、醇解得到的一种链状结构的 结晶性聚合物,EVOH的结构决定了其具有聚乙烯的透气性和聚乙烯醇的亲液性 双重优点,同时具有优良的化学,电化学稳定性,机械强度高,伸缩性好等特点。
高压静电纺丝技术是近年来兴起的一种制备纳米纤维膜的重要方法,其原理 是通过施加电场来拉伸聚合物溶液,经过细化与溶剂挥发后得到聚合物超细纤维。 其制得的纤维直径在纳米和微米之间,纤维堆积而成的层状膜有密度小、比表面 积大、孔隙率高、离子电导率高等特点,可以克服现有工艺制备的聚烯烃类隔膜 材料孔隙率低、吸液率少、浸润性能差的不足。
发明内容
本发明的目的是提供一种应用于锂电池隔膜的复合膜材料的制备方法,本发 明采用静电纺丝技术,制备出一种应用于锂离子电池隔膜的水性聚氨酯/EVOH 纳米纤维复合膜材料,该复合膜材料具有稳定性好,热尺寸收缩率小,拉伸强度 大,吸液率高等优点。
其技术方案如下:
将聚酯多元醇、乙二醇、丁酮和甲苯二异氰酸酯在N2保护条件下反应3~6h, 得到预聚体;然后在预聚体中加入2,2-二羟甲基丙酸进行扩链;扩链完成后加入 三乙胺进行中和,再加入水乳化,得到水性聚氨酯乳液;将聚乙烯-乙烯醇(EVOH) 在强极性混合溶剂中溶解,配置成EVOH溶液;将水性聚氨酯乳液和EVOH溶 液采用静电纺丝对喷的方法制备出所述复合膜材料。
本发明制备方法具体包括如下步骤:
S1:将聚酯多元醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然 后将其取出冷却至40℃,以备下步使用。
S2:将聚酯多元醇和乙二醇以质量比为50:1.1~1.6的比例加入到带有温度 计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让其进行 不间断的搅拌,然后加入丁酮,在45~60℃下反应10min,加入甲苯二异氰酸酯, 将温度升至65~80℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在65~80℃下继续反应1h;然 后将温度降至40~50℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌 1h进行乳化,得到水性聚氨酯乳液。
S4:将EVOH(聚乙烯-乙烯醇)加入到强极性混合溶剂中,配置成质量浓 度为10%~30%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组 成,A为N,N-二甲基甲酰胺,B为乙腈、甲醇、乙醇、异丙醇、乙酸乙酯中的 一种,并且A和B的体积比为10:1~3。
S5:将水性聚氨酯乳液和EVOH溶液分别加入到对喷静电纺丝设备的两个 注射泵中,置于收集轮两侧,其中水性聚氨酯乳液的纺丝电压为29kV,进射速 率为0.18mL/h,距离为16cm;EVOH溶液的纺丝电压为28kV,进射速率为 0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
优选的,所述聚酯多元醇为聚己二酸乙二醇酯二醇。
优选的,上述步骤S2和S3中,加入丁酮、甲苯二异氰酸酯、2,2-二羟甲基 丙酸、三乙胺和去离子水或蒸馏水的量应该和聚酯多元醇成一定比例。
更优选的,上述步骤S2中加入聚酯多元醇和丁酮的重量比为5:2.5~3.3。
更优选的,上述步骤S2中加入聚酯多元醇和甲苯二异氰酸酯的重量比为 1:0.4~0.45。
更优选的,上述步骤S3中加入预聚体、2,2-二羟甲基丙酸、三乙胺和去离 子水或蒸馏水的重量比为1:0.1~0.15:0.075~0.08:4。
优选的,配置EVOH溶液所用强极性混合溶剂为N,N-二甲基甲酰胺/乙腈、 N,N-二甲基甲酰胺/乙醇、N,N-二甲基甲酰胺/异丙醇、N,N-二甲基甲酰胺/乙酸 乙酯。
优选的,配置EVOH溶液所用混合溶剂地体积比为10:1~2。
优选的,配置EVOH溶液的浓度为10%~20%。
本发明具有如下有益效果:
(1)本发明所制备的复合膜是采用高压静电纺丝制备,制得的纤维直径在 纳米和微米之间,纤维堆积的层状膜密度小,孔隙率高,膜的厚度均匀,具备高 吸液率特点。
(2)本发明所用的水性聚氨酯和EVOH溶液都具有较强的极性,两种液体 通过静电纺丝制备的复合膜,能够很好地亲和,层状之间有较高的亲和力,使得 整个膜层与层之间连接紧密。
(3)利用EVOH溶液制得的薄膜有很好的吸液率,且水性聚氨酯薄膜在吸 液率上也有优异的性能,通过本发明地制备方法制备的复合膜,兼具两种膜的优 异性能,其吸液率达到381%。
(4)本发明制备的纳米复合膜有效的克服了水性聚氨酯膜的拉伸强度差, 力学性能差的特点,因为EVOH属于高分子树脂,通过复合之后弥补了水性聚 氨酯膜该方面的缺点。
(5)本发明制备的纳米复合膜,由于水性聚氨酯薄膜有着良好的热稳定性, 因此该复合膜在160℃时,复合膜不会大面积的收缩,经测试仅为0.6%左右,具 备了电子隔膜的要求。
附图说明
图1为本发明中使用的对喷静电纺丝设备示意图;
图2为本发明实施例6所制备的复合膜材料的SEM图图谱;
图3为本发明实施例6所制备的复合膜材料与对比例膜材料的吸液率图;
图4为本发明实施例6所制备的复合膜材料与对比例膜材料的拉伸强度图;
图5为本发明实施例6所制备的复合膜材料与对比例膜材料的热尺寸横向收 缩率图;
附图标记:1为接收辊、2为第一高压发生器、3为第二高压发生器、4为第 一注射泵、5为第二注射泵。
具体实施方式
下面对本发明实施例作具体详细的说明,本实施例在本发明技术方案为前提 下进行实施,给出了详细的实施方式和具体的操作过程,但本发明的保护范围不 限于下述的实施例。
实施例1
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.1的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在45℃下反应10min,加入甲苯二异氰酸 酯,将温度升至65℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在65℃下继续反应1h;然后将 温度降至40℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为 1:0.1:0.075:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为10%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为乙腈,并且A和B的体积比为10:1。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
实施例2
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.6的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在60℃下反应10min,加入甲苯二异氰酸 酯,将温度升至80℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在80℃下继续反应1h;然后将 温度降至50℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为1:0.15:0.08:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为30%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为甲醇,并且A和B的体积比为10:3。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
实施例3
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.2的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在45~60℃下反应10min,加入甲苯二异 氰酸酯,将温度升至70℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在70℃下继续反应1h;然后将 温度降至45℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为 1:0.11:0.076:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为12%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为乙醇,并且A和B的体积比为10:1.2。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
实施例4
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.3的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在50℃下反应10min,加入甲苯二异氰酸 酯,将温度升至75℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在75℃下继续反应1h;然后将 温度降至40℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为 1:0.12:0.077:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为15%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为异丙醇,并且A和B的体积比为10:1.5。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
实施例5
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.4的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在60℃下反应10min,加入甲苯二异氰酸 酯,将温度升至80℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在70℃下继续反应1h;然后将 温度降至50℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为 1:0.13:0.078:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为20%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为乙酸乙酯,并且A和B的体积比为10:2。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
实施例6
一种应用于锂电池隔膜的复合膜材料的制备方法,具体包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.5的比例加入到带 有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让 其进行不间断的搅拌,然后加入丁酮,在60℃下反应10min,加入甲苯二异氰酸 酯,将温度升至70℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在80℃下继续反应1h;然后将 温度降至50℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行 乳化,其中预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为 1:0.14:0.079:4,得到水性聚氨酯乳液。
S4:将聚乙烯-乙烯醇(EVOH)加入到强极性混合溶剂中,配置成质量浓 度为25%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A 为N,N-二甲基甲酰胺,B为乙醇,并且A和B的体积比为10:2.5。
S5:将水性聚氨酯乳液加入到对喷静电纺丝设备的第一注射泵中,将EVOH 溶液加入到对喷静电纺丝设备的第二注射泵中,置于接收轮两侧,其中控制水性 聚氨酯乳液对应的第一高压发生器的纺丝电压为29kV,进射速率为0.18mL/h, 距离为16cm;控制EVOH溶液对应的第二高压发生器的纺丝电压为28kV,进 射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
对比例1
水性聚氨酯薄膜的制备,包括如下步骤:
S1:将聚己二酸乙二醇酯二醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用。
S2:将聚己二酸乙二醇酯二醇和乙二醇以质量比为50:1.3的比例加入到带有 温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让其 进行不间断的搅拌,然后加入丁酮,在45℃下反应10min,加入甲苯二异氰酸酯, 将温度升至70℃,反应3h,得到预聚体。
S3:将2,2-二羟甲基丙酸加入到预聚体中,在70℃下继续反应1h;然后将 温度降至40℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h,得 到水性聚氨酯乳液。
S4:将水性聚氨酯乳液通过流延成膜法在玻璃板上自然干燥2~4天成膜,得 到水性聚氨酯薄膜。
对比例2
纯EVOH薄膜的制备,包括以下步骤:
S1:将聚乙烯-乙烯醇(EVOH)加入N,N-二甲基甲酰胺/异丙醇的混合溶剂 中,两种溶剂体积比为10:1,配置成浓度为18%的EVOH溶液。
S2:将EVOH溶液加入到静电纺丝设备的注射泵中,EVOH溶液的纺丝电 压为28kV,进射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纯 EVOH膜。
对比例3
市售某一品牌薄膜材料(商业膜)。
试验例:
对实施例6制备的复合膜材料、对比例1制备的水性聚氨酯薄膜、对比例2 制备的纯EVOH薄膜和对比例3的商业膜,分别测试吸液率、拉伸强度和热尺 寸横向收缩率,得到结果如图3-5所示。
由图3-5可以看出,本发明制备的复合膜材料其性能优于对比例1-3的膜材 料。
Claims (9)
1.一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,将聚酯多元醇、乙二醇、丁酮和甲苯二异氰酸酯在N2保护条件下反应3~6h,得到预聚体;然后在预聚体中加入2,2-二羟甲基丙酸进行扩链;扩链完成后加入三乙胺进行中和,再加入水乳化,得到水性聚氨酯乳液;将聚乙烯-乙烯醇(EVOH)在强极性混合溶剂中溶解,配置成EVOH溶液;将水性聚氨酯乳液和EVOH溶液采用静电纺丝对喷的方法制备出所述复合膜材料。
2.根据权利要求1所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,制备方法包括以下步骤:
S1:将聚酯多元醇和乙二醇先分别置于110℃的烘箱中加热干燥50min,然后将其取出冷却至40℃,以备下步使用;
S2:将聚酯多元醇和乙二醇以质量比为50:1.1~1.6的比例加入到带有温度计、磁力搅拌器、回流冷凝管和N2保护的三颈瓶中,打开磁力搅拌器让其进行不间断的搅拌,然后加入丁酮,在45~60℃下反应10min,加入甲苯二异氰酸酯,将温度升至65~80℃,反应3h,得到预聚体;
S3:将2,2-二羟甲基丙酸加入到预聚体中,在65~80℃下继续反应1h;然后将温度降至40~50℃,加入三乙胺中和,然后加去离子水或者蒸馏水高速搅拌1h进行乳化,得到水性聚氨酯乳液;
S4:将EVOH加入到强极性混合溶剂中,配置成质量浓度为10%~30%的EVOH溶液;其中所述强极性混合溶剂由A和B两种物质组成,A为N,N-二甲基甲酰胺,B为乙腈、甲醇、乙醇、异丙醇、乙酸乙酯中的一种,并且A和B的体积比为10:1~3;
S5:将水性聚氨酯乳液和EVOH溶液分别加入到对喷静电纺丝设备的两个注射泵中,置于收集轮两侧,其中水性聚氨酯乳液的纺丝电压为29kV,进射速率为0.18mL/h,距离为16cm;EVOH溶液的纺丝电压为28kV,进射速率为0.27mL/h,距离为19cm,采用以上参数进行纺丝得到纳米复合膜材料。
3.根据权利要求1或2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,配置EVOH溶液所用强极性混合溶剂为N,N-二甲基甲酰胺/乙腈、N,N-二甲基甲酰胺/乙醇、N,N-二甲基甲酰胺/异丙醇和N,N-二甲基甲酰胺/乙酸乙酯中的一种。
4.根据权利要求2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,上述步骤S2中加入聚酯多元醇和丁酮的重量比为5:2.5~3.3。
5.根据权利要求2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,上述步骤S2中加入聚酯多元醇和甲苯二异氰酸酯的重量比为1:0.4~0.45。
6.根据权利要求1所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,所述聚酯多元醇为聚己二酸乙二醇酯二醇。
7.根据权利要求2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,上述步骤S3中加入预聚体、2,2-二羟甲基丙酸、三乙胺和去离子水或蒸馏水的重量比为1:0.1~0.15:0.075~0.08:4。
8.根据权利要求2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,上述步骤S4中A和B的体积比为10:1~2。
9.根据权利要求1或2所述的一种应用于锂电池隔膜的复合膜材料的制备方法,其特征在于,配置EVOH溶液的质量浓度为10%~20%。
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CN114447522A (zh) * | 2021-12-30 | 2022-05-06 | 广东粤港澳大湾区黄埔材料研究院 | 一种聚氨酯隔膜及其制备方法与应用 |
CN118213539A (zh) * | 2024-05-17 | 2024-06-18 | 江苏源氢新能源科技股份有限公司 | 抗冷冻的膜电极的制备工艺 |
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CN114447522A (zh) * | 2021-12-30 | 2022-05-06 | 广东粤港澳大湾区黄埔材料研究院 | 一种聚氨酯隔膜及其制备方法与应用 |
CN118213539A (zh) * | 2024-05-17 | 2024-06-18 | 江苏源氢新能源科技股份有限公司 | 抗冷冻的膜电极的制备工艺 |
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