CN105524291A - 双层peek树脂复合材料模块及其制备方法 - Google Patents

双层peek树脂复合材料模块及其制备方法 Download PDF

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CN105524291A
CN105524291A CN201510736758.6A CN201510736758A CN105524291A CN 105524291 A CN105524291 A CN 105524291A CN 201510736758 A CN201510736758 A CN 201510736758A CN 105524291 A CN105524291 A CN 105524291A
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peek resin
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杨文光
陈佩民
靳予
孙克原
支永潮
杨勇
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NANJING COMPTECH NEW MATERIAL CO Ltd
NANJING KENTE COMPOSITE MATERIAL CO Ltd
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Abstract

本发明公开了一种双层PEEK树脂复合材料模块，包括内芯层以及喷涂在内芯层表面的外涂层，所述内芯层为短切玻璃纤维及碳纤维联合增强的PEEK树脂，所述外涂层为PEEK/PTFE树脂。本发明用短切玻璃纤维及碳纤维联合增强PEEK树脂，两者以一定比例填充到PEEK树脂中，能显著增强PEEK树脂的硬度和耐磨性。模块表面先用浓硫酸进行粗糙处理，然后用乙醇吹洗干净后，喷涂一薄层PEEK/PTFE树脂作为外涂层，制得的模块具有优异的机械性能，而且表面的纤维断裂头被PEEK/PTFE树脂所包裹，表面摩擦系数低，不会划伤与模块接触的材料表面。粗糙处理过的表面使喷涂的外涂层与内芯层结合的更紧密，长期使用后外涂层与内芯层之间不易剥离。

Description

双层PEEK树脂复合材料模块及其制备方法
技术领域
本发明涉及双层PEEK树脂复合材料模块及其制备方法，属于复合材料领域。
背景技术
聚醚醚酮(PEEK)是分子主链中含有链节的线性芳香族高分子化合物，是一种耐高温、高性能的热塑性特种工程塑料。PEEK有着良好的机械性能和耐化学品、耐磨损、耐水解等性能；比重轻，自润滑性能好，具有非常好的加工性能，可以应用到航空、机械、电子、化工、汽车等高科技工业领域。用玻璃纤维结合碳纤维增强PEEK制备的高性能复合材料，具有及其优秀的耐磨性能,同时抗冲击性能和抗压缩性能也更优良。良好的力学强度使其在某些零部件足以替代金属使用，因此，在航空航天、高铁、汽车等高科技领域中具有重要的应用前景。
在速度高达350KM/h的高速铁路列车领域，玻璃纤维增强及碳纤维增强的PEEK树脂由于其优异的机械性能，是制作导向块的最佳选择，硬度高，耐磨性好，耐高温，可以承受多次的高速往返运动而不产生形变，不开裂。但是，玻璃纤维及碳纤维增强PEEK树脂存在于表面的纤维断裂头容易划伤与导向块接触的滑轨，造成滑轨表面光滑度下降，影响滑动效率。
发明内容
本发明的目的是提供一种双层PEEK树脂复合材料模块，具有良好的机械性能，并且摩擦系数小，表面光滑，不易划伤与之接触的其他物品表面。
为达到上述目的，本发明采用的技术方案为：一种双层PEEK树脂复合材料模块，包括内芯层以及喷涂在内芯层表面的外涂层，所述内芯层为短切玻璃纤维及碳纤维联合增强的PEEK树脂，所述外涂层为PEEK/PTFE树脂。
更进一步的，所述内芯层中包括18-22％的短切玻璃纤维，4-8％的碳纤维，4-6％的石墨，61-72％的PEEK，2-3％的硅烷偶联剂。
更进一步的，所述短切玻璃纤维长度为1-3mm，直径为9-13μm。
更进一步的，所述外涂层中含有75-82％的PEEK，15-20％的PTFE和3-5％的纳米Si3N4。
本发明还公开了上述的双层PEEK树脂复合材料模块的制备方法，其步骤包括：
A、将短切玻璃纤维、碳纤维、石墨和PEEK干燥后混匀，加入硅烷偶联剂，加热注塑成型，制得内芯层；
B、用高压喷雾装置喷涂浓硫酸溶液在模块表面，控制喷雾液滴和喷雾量大小，使模块形成粗糙表面；
C、用高压喷雾装置喷涂乙醇溶液在模块表面，对模块表面进行吹洗；
D、将PEEK，PTFE和纳米Si3N4粉末混合均匀后，在400-430℃下熔融，熔融体通过高压喷雾装置喷涂到模块表面，形成外涂层，控制外涂层的厚度在200um-400um之间，250℃保温1-2h，制得成品。
本发明用短切玻璃纤维及碳纤维联合增强PEEK树脂，两者以一定比例填充到PEEK树脂中，能显著增强PEEK树脂的硬度和耐磨性。模块表面先用浓硫酸进行粗糙处理，然后用乙醇吹洗干净后，喷涂一薄层PEEK/PTFE树脂作为外涂层，制得的模块具有优异的机械性能，而且表面的纤维断裂头被PEEK/PTFE树脂所包裹，表面摩擦系数低，不会划伤与模块接触的材料表面。粗糙处理过的表面使喷涂的外涂层与内芯层结合的更紧密，长期使用后外涂层与内芯层之间不易剥离。外涂层采用添加了纳米Si3N4的PEEK/PTFE树脂，摩擦系数低，其稳定摩擦系数在0.2-0.3之间，而且添加的纳米Si3N4的在摩擦过程中可以发生摩擦化学反应，新的化合物的生成可增加转移膜与对摩擦面的结合强度，使得短切玻璃纤维及碳纤维联合增强的PEEK树脂模块具有更强的耐磨性能。
具体实施方式
实施例1
本双层PEEK树脂复合材料模块的制备方法，其步骤包括：
A、将18％短切玻璃纤维、4％碳纤维、4％石墨和72％PEEK干燥后混匀，加入2％硅烷偶联剂，常规工艺加热注塑成型，制得内芯层；
B、用高压喷雾装置喷涂浓硫酸溶液在模块表面，喷雾压力为300mmAq，控制喷雾液滴和喷雾量大小，使模块形成粗糙表面；
C、用高压喷雾装置喷涂乙醇溶液在模块表面，对模块表面进行吹洗；
D、将75％的PEEK，20％的PTFE和5％的纳米Si3N4粉末混合均匀后，在430℃下熔融，熔融体通过高压喷雾装置喷涂到模块表面，形成外涂层，控制外涂层的厚度在200um左右，250℃保温1-2h，制得成品。
对制得的双层PEEK树脂复合材料模块进行性能测试，测试结果见表1。
实施例2
本双层PEEK树脂复合材料模块的制备方法与实施例1一致，内芯层中各组分配比为：22％短切玻璃纤维、8％碳纤维、6％石墨、61％PEEK和3％硅烷偶联剂；外涂层中各组分配比为：PEEK82％，PTFE15％、纳米Si3N43％。对制得的双层PEEK树脂复合材料模块进行性能测试，测试结果见表1。
实施例3
本双层PEEK树脂复合材料模块的制备方法与实施例1一致，内芯层中各组分配比为：20％短切玻璃纤维、6％碳纤维、5％石墨、66.5％PEEK和2.5％硅烷偶联剂；外涂层中各组分配比为：PEEK78％，PTFE18％、纳米Si3N44％。对制得的双层PEEK树脂复合材料模块进行性能测试，测试结果见表1。
以上本发明中提到的百分比均为质量百分比。
表1双层PEEK树脂复合材料模块性能测试结果
备注：摩擦磨损试验条件：初始负荷196N，转速200r/min,干摩擦2h。对磨轮：45钢，42-45HRC。

Claims (5)

1.一种双层PEEK树脂复合材料模块，其特征在于：包括内芯层以及喷涂在内芯层表面的外涂层，所述内芯层为短切玻璃纤维及碳纤维联合增强的PEEK树脂，所述外涂层为PEEK/PTFE树脂。
2.根据权利要求1所述的双层PEEK树脂复合材料模块，其特征在于：所述内芯层中包括18-22％的短切玻璃纤维，4-8％的碳纤维，4-6％的石墨，61-72％的PEEK，2-3％的硅烷偶联剂。
3.根据权利要求2所述的双层PEEK树脂复合材料模块，其特征在于：所述短切玻璃纤维长度为1-3mm，直径为9-13μm。
4.根据权利要求1所述的双层PEEK树脂复合材料模块，其特征在于：所述外涂层中含有75-82％的PEEK，15-20％的PTFE和3-5％的纳米Si3N4。
5.一个权利要求1-4中任一项所述的双层PEEK树脂复合材料模块的制备方法，其步骤包括：
A、将短切玻璃纤维、碳纤维、石墨和PEEK干燥后混匀，加入硅烷偶联剂，加热注塑成型，制得内芯层；
B、用高压喷雾装置喷涂浓硫酸溶液在模块表面，控制喷雾液滴和喷雾量大小，使模块形成粗糙表面；
C、用高压喷雾装置喷涂乙醇溶液在模块表面，对模块表面进行吹洗；
D、将PEEK，PTFE和纳米Si3N4粉末混合均匀后，在400-430℃下熔融，熔融体通过高压喷雾装置喷涂到模块表面，形成外涂层，控制外涂层的厚度在200um-400um之间，250℃保温1-2h，制得成品。
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CN107474478A (zh) * 2017-09-22 2017-12-15 南京肯特复合材料股份有限公司 耐磨防自转十字滑环peek树脂复合材料及其制备方法
WO2018233349A1 (zh) * 2017-06-20 2018-12-27 方达能源集团有限公司 偏航刹车片及其制备方法
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