CN105524291A - 双层peek树脂复合材料模块及其制备方法 - Google Patents
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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
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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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 |
US11592069B2 (en) | 2017-06-20 | 2023-02-28 | Forda Energy Uk Limited | Yaw brake pad and method of producing the same |
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 |
WO2022039955A1 (en) * | 2020-08-18 | 2022-02-24 | Illinois Tool Works Inc. | Composite material and fastening nut made of that composite material |
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