CN110079011A - 氮化物改性的导电母粒及其制备方法和应用 - Google Patents

氮化物改性的导电母粒及其制备方法和应用 Download PDF

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CN110079011A
CN110079011A CN201910322754.1A CN201910322754A CN110079011A CN 110079011 A CN110079011 A CN 110079011A CN 201910322754 A CN201910322754 A CN 201910322754A CN 110079011 A CN110079011 A CN 110079011A
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nitride
conductive
agglomerate
conductive filler
fluoropolymer resin
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孙侠
张堂俊
丁利忠
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Zhejiang Jin Cai New Material Co Ltd
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Abstract

本发明公开了氮化物改性的导电母粒及其制备方法和应用，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为聚丙烯、聚乙烯、丙烯腈‑丁二烯‑苯乙烯、乙烯‑醋酸乙烯酯、聚氯乙烯或聚氨酯，导电填料为氮化钒、六方氮化硼中的至少一种，加工助剂为甘油、PE蜡、蒙旦蜡中的至少一种；聚合物树脂、导电填料和加工助剂的重量比为10:0.5‑1.2:0.01‑0.05。(1)本发明所述氮化物改性的导电母粒通过在聚合物树脂中填入导电填料，改善了母粒的导电性能；(2)采用该母粒制备获得的锂硫电池隔膜具有良好的抑制穿梭效应，从而提高了电池的循环稳定性，有利于加快锂硫电池电化学反应动力学；(3)本发明所述方法生产工艺简单，可操作性强。

Description

氮化物改性的导电母粒及其制备方法和应用
技术领域
本发明属于高分子材料技术领域，涉及一种功能性高分子材料，具体为氮化物改性的导电母粒及其制备方法和应用。
背景技术
聚丙烯、聚乙烯等高分子材料由于具有优异的力学、隔热、阻燃和轻质等性能，正在受到人们极大的关注。在EPP系列产品中，导电EPP有其特殊的应用而倍受重视。通常情况下，在聚合物中加入导电材料可以制备导电聚合物。但是，由于导电EPP存在以下几个方面的原因，而使常规方法失效。一个问题是，EPP是由特殊性能的PP，经过物理、化学方法发泡而得到。如果将导电PP直接用于发泡，不仅发泡性能恶化，而且导电性能也得不到保证。另一个问题是，由于导电材料质轻、比重小，因此很难做到在聚合物中均匀分散。将导电材料采用特殊加工手段制备成导电母粒，再将导电母粒添加至可适合于发泡工艺的PP母粒中，制成EPP是切实可行的方法。
另外，隔膜作为锂电池体系中的重要组成部分之一，其性能的优劣对电池性能有着重要的影响。锂硫电池由于充放电反应过程的复杂性及电解液的多样性，传统的聚烯烃隔膜不能很好地抑制锂硫电池中间产物聚硫化物的扩散。因此，开发更高品质隔膜材料成为改善锂硫电池整体性能重要方向之一。研究发现，采用极性金属氧化物例，能够对多硫化物进行更为可靠的化学吸附，有望进一步抑制多硫化物的穿梭效应。遗憾的是绝缘的氧化物会阻碍电子和锂离子的传输，降低硫的利用率和倍率性能。良好的导电性与可靠的化学吸附难以两全。
发明内容
解决的技术问题：为了克服现有技术的不足，获得一种导电填料分散均匀，导电性能稳定，且能够很好的应用与锂硫电池中，提高锂硫电池的循环稳定性，本发明提供了氮化物改性的导电母粒及其制备方法和应用。
技术方案：氮化物改性的导电母粒，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为聚丙烯、聚乙烯、丙烯腈-丁二烯-苯乙烯、乙烯-醋酸乙烯酯、聚氯乙烯或聚氨酯，导电填料为氮化钒、六方氮化硼中的至少一种，加工助剂为甘油、PE蜡、蒙旦蜡中的至少一种；聚合物树脂、导电填料和加工助剂的重量比为10:0.5-1.2:0.01-0.05。
优选的，所述导电母粒中聚合物树脂、导电填料和加工助剂的重量比为10:1:0.03。
优选的，所述导电填料为氮化钒和六方氮化硼的混合物，且氮化钒与六方氮化硼的质量比为1-3:1-2。
优选的，所述导电填料为纳米氮化钒或纳米六方氮化硼。
以上任一所述氮化物改性的导电母粒的制备方法，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、100-200rpm条件下密炼15-20min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
优选的，步骤(1)中将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、160rpm条件下密炼20min。
以上任一所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
以上任一所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
有益效果：(1)本发明所述氮化物改性的导电母粒通过在聚合物树脂中填入导电填料，改善了母粒的导电性能；(2)采用该母粒制备获得的锂硫电池隔膜具有良好的抑制穿梭效应，从而提高了电池的循环稳定性，有利于加快锂硫电池电化学反应动力学；(3)本发明所述方法生产工艺简单，可操作性强。
具体实施方式
以下实施例进一步说明本发明的内容，但不应理解为对本发明的限制。在不背离本发明精神和实质的情况下，对本发明方法、步骤或条件所作的修改和替换，均属于本发明的范围。若未特别指明，实施例中所用的技术手段为本领域技术人员所熟知的常规手段。
实施例1
氮化物改性的导电母粒，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为聚丙烯，导电填料为氮化钒，加工助剂为甘油；聚合物树脂、导电填料和加工助剂的重量比为10:0.5:0.01。
所述导电填料为纳米氮化钒或纳米六方氮化硼。
以上所述氮化物改性的导电母粒的制备方法，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、100rpm条件下密炼15min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
以上所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
以上所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
本实施例制备获得的导电母粒导电率达到103Ω·m。
实施例2
氮化物改性的导电母粒，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为聚乙烯，导电填料为六方氮化硼，加工助剂为PE蜡；聚合物树脂、导电填料和加工助剂的重量比为10:0.7:0.02。
所述导电填料为纳米氮化钒或纳米六方氮化硼。
以上所述氮化物改性的导电母粒的制备方法，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、150rpm条件下密炼18min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
以上所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
以上所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
本实施例制备获得的导电母粒导电率达到103Ω·m。
实施例3
氮化物改性的导电母粒，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为丙烯腈-丁二烯-苯乙烯，导电填料为氮化钒和六方氮化硼的混合物，加工助剂为蒙旦蜡；聚合物树脂、导电填料和加工助剂的重量比为10:1:0.03。
所述导电填料为氮化钒和六方氮化硼的混合物，且氮化钒与六方氮化硼的质量比为1-3:1-2。
所述导电填料为纳米氮化钒或纳米六方氮化硼。
以上所述氮化物改性的导电母粒的制备方法，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、200rpm条件下密炼20min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
以上所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
以上所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
本实施例制备获得的导电母粒导电率达到103Ω·m。
实施例4
氮化物改性的导电母粒，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为乙烯-醋酸乙烯酯、聚氯乙烯或聚氨酯，导电填料为氮化钒和六方氮化硼的混合物，加工助剂为甘油、PE蜡、蒙旦蜡中的至少一种；聚合物树脂、导电填料和加工助剂的重量比为10:1:0.03。
所述导电填料为氮化钒和六方氮化硼的混合物，且氮化钒与六方氮化硼的质量比为1-3:1-2。
所述导电填料为纳米氮化钒或纳米六方氮化硼。
以上任一所述氮化物改性的导电母粒的制备方法，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、160rpm条件下密炼20min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
以上任一所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
以上任一所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
本实施例制备获得的导电母粒导电率达到104Ω·m。

Claims (8)

1.氮化物改性的导电母粒，其特征在于，所述导电母粒包括聚合物树脂、导电填料和加工助剂；其中聚合物树脂为聚丙烯、聚乙烯、丙烯腈-丁二烯-苯乙烯、乙烯-醋酸乙烯酯、聚氯乙烯或聚氨酯，导电填料为氮化钒、六方氮化硼中的至少一种，加工助剂为甘油、PE蜡、蒙旦蜡中的至少一种；聚合物树脂、导电填料和加工助剂的重量比为10:0.5-1.2:0.01-0.05。
2.根据权利要求1所述的氮化物改性的导电母粒，其特征在于，所述导电母粒中聚合物树脂、导电填料和加工助剂的重量比为10:1:0.03。
3.根据权利要求1所述的氮化物改性的导电母粒，其特征在于，所述导电填料为氮化钒和六方氮化硼的混合物，且氮化钒与六方氮化硼的质量比为1-3:1-2。
4.根据权利要求1所述的氮化物改性的导电母粒，其特征在于，所述导电填料为纳米氮化钒或纳米六方氮化硼。
5.权利要求1-4任一所述氮化物改性的导电母粒的制备方法，其特征在于，所述方法包括以下步骤：
(1)将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、100-200rpm条件下密炼15-20min；
(2)将步骤(1)密炼后的混合料经双螺杆挤出压片机压成片材，片材经切粒后制成氮化物改性的导电母粒。
6.根据权利要求5所述的氮化物改性的导电母粒的制备方法，其特征在于，步骤(1)中将聚合物树脂、导电填料和加工助剂加入密炼机中混合，常温、160rpm条件下密炼20min。
7.权利要求1-4任一所述氮化物改性的导电母粒在制备锂硫电池用功能性复合隔膜中的应用。
8.权利要求1-4任一所述氮化物改性的导电母粒在制备防静电塑料包装材料中的应用。
CN201910322754.1A 2019-04-22 2019-04-22 氮化物改性的导电母粒及其制备方法和应用 Pending CN110079011A (zh)

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