CN104419199A - 一种芳纶浆粕增强pa66复合材料及其制备方法 - Google Patents
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Abstract
本发明涉及一种芳纶浆粕增强PA66复合材料及其制备方法,属于高分子材料制备技术领域。本发明中的PA66复合材料由以下质量百分数的原料组成:PA66(88%-98%)、表面处理的芳纶浆粕(1%-10%)、偶联剂(0.4%-1%)、抗氧剂(0.5%-1%)制成。本发明通过添加表面改性的芳纶浆粕,提高了复合材料的力学性能以及耐摩擦性能,得到的PA66复合材料拉伸强度大于80MPa,弯曲强度大于140MPa,弯曲模量大于4000MPa,摩擦系数0.2左右,可以替代比重大、对加工设备磨损严重的玻璃纤维增强尼龙复合材料,广泛适用于汽车工业、仪器壳体以及其它有抗冲击性、高强度、高耐磨性要求的产品,例如齿轮、风扇叶片、垫片和各种把手等。
Description
技术领域
本发明属于高分子材料制备技术领域,具体涉及一种芳纶浆粕增强PA66复合材料及其制备方法。
背景技术
PA66即聚己二酸己二胺,具有优良的耐磨性、韧性、耐热性等,但其机械性能还存在缺陷,例如吸湿性大、耐强酸强碱性差、制品尺寸稳定性差、耐光性差等缺点。目前,针对PA66增强改性的纤维有玻璃纤维、碳纤维、硼纤维、和芳纶纤维等。
近年来新开发的芳纶浆粕是对芳纶纤维进行表面原纤化处理之后得到的,其独特的表面结构极大地提高了混合物的相容性,具有优良的物理机械性能和良好的化学性能。如高强度、高模量、高耐磨、质轻、尺寸稳定、热稳定性好等等。在形态结构上,芳纶浆粕具有长度短、长径比高、纤化、毛羽丰富、表面积大等特点。是一种高强度、高模量、低密度和耐磨性好的有机合成的高科技纤维,广泛用于航天航空、高速列车、电子设备等领域。
芳纶纤维增强PA66复合材料是一种高比强度,高比模量,低密度,抗冲击,耐疲劳,耐烧蚀性能好的结构材料。广泛用于航空航天、舰船,高速列车,体育运动器材等领域。通过添加芳纶浆粕增强PA66,得到的复合材料力学性能优异,耐摩擦性良好,可以进一步替代比重大、对加工设备磨损严重的玻璃纤维增强PA66复合材料,广泛用于汽车工业中,例如齿轮、滑轮、风扇叶片、离合器踏板、刹车片等。
发明内容
本发明所要解决的技术问题是提供了一种芳纶浆粕增强PA66复合材料及其制备方法。
本发明是通过以下技术方案实现的:
步骤一、芳纶浆粕的表面预处理:
(1)将芳纶浆粕浸入到丙酮中1.5小时,再浸入到无水乙醇中加热煮沸1.5小时;然后将芳纶浆粕放置于去离子水中洗涤,完毕后在110℃下干燥2.5小时;(2)等离子体处理:将预处理后的芳纶浆粕放入等离子体处理设备空腔内,等离子体气体源为氧气,输出功率100W,偏压为100V,处理时间为5min,工作压力为20Pa。即得到表面改性的芳纶浆粕。
步骤二、按以下组份称取原料后经高混机混合制备预混料:
PA66 88%-98%
表面处理的芳纶浆粕 1%-10%
偶联剂 0.4%-1%
抗氧剂 0.5%-1%
步骤三、预混料经同向双螺杆挤出机挤出,挤出工艺为一区260~270℃、二区260~270℃、三区260~270℃、四区260~270℃、五区245~255℃、六区245~255℃、七区245~255℃、八区245~255℃、九区245~255℃、十区245~255℃;主机转速为300~500rpm;主喂料喂料转数为20~30rpm。经水冷、风冷、造粒后得到芳纶浆粕增强PA66复合材料。
本发明提供的芳纶浆粕增强PA66复合材料力学性能优异,耐磨性提高,可以广泛用于摩擦产品中。
具体实施方式
实施例一
首先将芳纶浆粕进行表面预处理,然后称取以下质量百分数的原料:PA66(95%)、表面处理的芳纶浆粕(3%)、偶联剂(0.4%)、抗氧剂(0.5%),经高混机混合制备预混料,最后将预混料经双螺杆挤出机挤出,挤出工艺为一区260~270℃、二区260~270℃、三区260~270℃、四区260~270℃、五区245~255℃、六区245~255℃、七区245~255℃、八区245~255℃、九区245~255℃、十区245~255℃;主机转速为300~500rpm;主喂料喂料转数为20~30rpm。经水冷、风冷、造粒后得到芳纶浆粕增强PA66复合材料。
实施例二
首先将芳纶浆粕进行表面预处理,然后称取以下质量百分数的原料:PA66(93%)、表面处理的芳纶浆粕(5%)、偶联剂(0.6%)、抗氧剂(0.7%),经高混机混合制备预混料,最后将预混料经双螺杆挤出机挤出,一区260~270℃、二区260~270℃、三区260~270℃、四区260~270℃、五区245~255℃、六区245~255℃、七区245~255℃、八区245~255℃、九区245~255℃、十区245~255℃;主机转速为300~500rpm;主喂料喂料转数为20~30rpm。经水冷、风冷、造粒后得到芳纶浆粕增强PA66复合材料。
实施例三
首先将芳纶浆粕进行表面预处理,然后称取以下质量百分数的原料:PA66(91%)、表面处理的芳纶浆粕(8%)、偶联剂(0.8%)、抗氧剂(0.9%),经高混机混合制备预混料,最后将预混料经双螺杆挤出机挤出,一区260~270℃、二区260~270℃、三区260~270℃、四区260~270℃、五区245~255℃、六区245~255℃、七区245~255℃、八区245~255℃、九区245~255℃、十区245~255℃;主机转速为300~500rpm;主喂料喂料转数为20~30rpm。经水冷、风冷、造粒后得到芳纶浆粕增强PA66复合材料。
实施例四
首先将芳纶浆粕进行表面预处理,然后称取以下质量百分数的原料:PA66(88%)、表面处理的芳纶浆粕(10%)、偶联剂(1%)、抗氧剂(1%),经高混机混合制备预混料,最后将预混料经双螺杆挤出机挤出,一区260~270℃、二区260~270℃、三区260~270℃、四区260~270℃、五区245~255℃、六区245~255℃、七区245~255℃、八区245~255℃、九区245~255℃、十区245~255℃;主机转速为300~500rpm;主喂料喂料转数为20~30rpm。经水冷、风冷、造粒后得到芳纶浆粕增强PA66复合材料。
由上述实施例一至实施例四得到的芳纶浆粕增强PA66复合材料检测结果列于下表:
检测项目 | 单位 | 检测标准 | 实施例一 | 实施例二 | 实施例三 | 实施例四 |
简支梁无缺口冲击强度 | KJ/㎡ | ISO 179 | 42 | 40 | 38.5 | 37.6 |
简支梁缺口冲击强度 | KJ/㎡ | ISO 179 | 9.1 | 8.6 | 8.2 | 8.0 |
拉伸强度 | MPa | ISO 527 | 190 | 195 | 185.5 | 180.2 |
断裂伸长率 | % | ISO 527 | 6.6 | 7.1 | 6.5 | 5.9 |
弯曲强度 | MPa | ISO 178 | 236 | 245 | 231.5 | 229.6 |
弯曲模量 | MPa | ISO 178 | 4150 | 4300 | 4060 | 3910 |
摩擦系数 | GB 3960 | 0.25 | 0.23 | 0.21 | 0.20 | |
体积磨损率 | 10-14m3.(Nm)-1 | GB 3960 | 1.12 | 1.08 | 1.05 | 1.01 |
Claims (5)
1.一种芳纶浆粕增强PA66复合材料,其特征在于由以下质量百分数的原料组成:PA66(88%-98%)、表面处理的芳纶浆粕(1%-10%)、偶联剂(0.4%-1%)、抗氧剂(0.5%-1%)。
2.根据权利要求1所述的芳纶浆粕增强PA66复合材料,其特征在于:所述的芳纶浆粕是指对芳纶纤维进行表面原纤化处理后得到的,所用的芳纶纤维为长径为4:1到40:1的短切芳纶纤维。
3.根据权利要求1所述的芳纶浆粕增强PA66复合材料,其特征在于:所述的表面处理的芳纶浆粕是由下述步骤制备的:一、将芳纶浆粕浸入到丙酮中煮沸1.5小时,再浸入到无水乙醇中加热1.5小时;然后将芳纶浆粕放置于去离子水中洗涤,完毕后在110℃下干燥2.5小时;二、等离子体处理:将预处理后的芳纶浆粕放入等离子体处理设备空腔内,等离子体气体源为氧气,输出功率100W,偏压为100V,处理时间为5min,工作压力为20Pa,即得到表面改性的芳纶浆粕。
4.根据权利要求1所述的芳纶浆粕增强PA66复合材料,其特征在于:所述的偶联剂为KH560即r-(2,3-环氧丙氧)丙基三甲氧基硅烷。
5.根据权利要求1所述的芳纶浆粕增强PA66复合材料,其特征在于:所述的抗氧剂为四【B-(3,5-二叔丁基-4-羟基苯基)丙酸】季戊四醇酯,三【2,4-二叔丁基苯基】亚磷酸酯。
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CN105908483A (zh) * | 2016-06-02 | 2016-08-31 | 江苏顺远新材料科技股份有限公司 | 一种芳纶纤维表面接枝改性方法 |
CN105908483B (zh) * | 2016-06-02 | 2018-03-27 | 江苏顺远新材料科技股份有限公司 | 一种芳纶纤维表面接枝改性方法 |
CN110982263A (zh) * | 2019-12-25 | 2020-04-10 | 贵州凯科特材料有限公司 | 导热尼龙材料及其制备方法和应用、散热器件 |
WO2022270807A1 (ko) * | 2021-06-25 | 2022-12-29 | 코오롱인더스트리 주식회사 | 섬유 강화 복합재 및 이를 포함하는 물품 |
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