CN109136895A - 一种钴-镍-磷磁性复合纤维及制备方法 - Google Patents
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Abstract
一种钴‑镍‑磷非晶合金复合纤维长度可连续,复合纤维断面为圆形、异形等形状,复合纤维的外径为0.01‑0.2mm,复合纤维芯丝直径为0.005‑0.08mm;复合纤维的包覆层为钴‑镍‑磷磁性金属,具体成分为Co为40‑85%,Ni为10‑20%,P为6‑20%,复合纤维的芯丝材质为聚合物。一种钴‑镍‑磷磁性复合纤维的制备方法步骤为:(1)采用碱性溶液,对聚合物纤维进行除油脱脂;(2)采用铬酐和硫酸溶液进行纤维表面的粗化;(3)采用酸性的锡盐溶液进行纤维的敏化;(4)采用硝酸银和氨水溶液进行纤维表面的活化;(5)纤维的化学镀钴‑镍‑磷合金;(6)纤维电刷镀钴‑镍‑磷合金。
Description
技术领域
本发明涉及到金属复合纤维的生产领域,尤其是涉及一种钴-镍-磷磁性复合纤维及制备方法。
背景技术
软磁材料的功能主要是导磁、电磁能量的转换与传输。目前,应用于软磁材料大体上可分为四类:合金薄带或薄片;非晶态合金薄带;磁介质粉料,经电绝缘介质包覆和粘合后按要求压制成形;铁氧体。以过渡金属(铁、钴、镍)为基质的非晶合金具有优异的软磁性,饱和磁感应强度高和交流损耗低,可广泛应用于高、低频变压器(部分代替硅钢片和坡莫合金)、磁传感器、记录磁头、磁屏蔽材料等。随着电子工程技术的迅速发展,先进软磁材料的研制和开发逐渐成为该领域的一个热点。采用过渡金属(铁、钴、镍)为基质的纤维制备磁介质粉体材料,可显著提高器件的软磁性能。同时,对钴镍磷合金的研究表明,具有较高的析氢催化活性,有利于降低槽压,提高效率。目前,对钴镍磷合金的相关研究更多集中工艺以及平板类镀层的相关领域。
针对以上不足,提出一种钴-镍-磷磁性复合纤维及其制备方法,钴-镍-磷磁性复合纤维可用来织成布作于催化剂,可极大的增加钴镍磷催化剂反应器表面积,同时,此纤维可广泛应用于磁介质粉体、电磁波吸收剂等。
发明内容
本发明要解决的技术问题是提供一种钴-镍-磷非晶合金复合纤维,复合纤维长度可连续,断面为圆形、异形等形状,复合纤维的外径为0.01-0.2mm,复合纤维芯丝直径为0.005-0.08mm;复合纤维的包覆层为钴-镍-磷磁性金属,具体成分为Co为40-85%,Ni为10-20%,P为6-20%,复合纤维的芯丝材质为聚合物。
一种钴-镍-磷磁性复合纤维的制备方法,其生产工艺流程为:对聚合物纤维进行表面处理(除油脱脂、粗化、敏化、活化)、聚合物纤维的化学镀钴-镍-磷、电镀钴-镍-磷合金镀层制成复合纤维。
本发明解决其技术问题所采用的方案,具体步骤为:
(1) 采用碱性溶液,对聚合物纤维进行除油脱脂;
(2) 采用铬酐和硫酸溶液进行纤维表面的粗化;粗化液组成为铬酐30-100g/L 、200-400ml/L 硫酸,:
(3) 采用酸性的锡盐溶液进行纤维的敏化;敏化液组成为氯化锡5-15g/L,盐酸20-50ml/L :
(4) 采用硝酸银和氨水溶液进行纤维表面的活化;
(5) 纤维的化学镀钴-镍-磷合金,溶液组成为:硫酸钴0.05-0.5mol/L,硫酸镍0.05-0.3mol/L,次磷酸钠0.1-0.5mol/L,羧酸盐0.1-0.5 mol/L,铵盐5-15g/L,滴定氨水溶液Ph值为8-10,化学镀时溶液温度为50-85℃,化学镀时间为0.5-2min;
(6) 纤维电刷镀钴-镍-磷合金
电刷镀溶液组成:可溶性钴盐1-4.5mol/L(优选2-3.5mol/L)、酸0.2-1mol/L、可溶性镍盐0.2-1.5mol/L、亚磷酸或次磷酸盐0.3-1.2mol/L、 络合剂0.5-15g/L、余量水;
上述酸包括硼酸、磷酸、羧酸等多元中强酸;
上述络合剂包括糖精、羧酸盐等;
制备工艺参数为:阳极采用石墨板,电极的电流密度为0.05-0.5A/mm2,电刷镀纤维,电极相对运动速度为5-20m/min(优选10-15m/min),滴定强酸溶液使镀液Ph值1-3,施镀温度为30-80℃。
本发明的优点是:
(1)选择不同直径或异形截面的聚丙烯纤维,可制备不同规铬和断面形状的连续钴-镍-磷磁性合金包覆复合纤维;
(2)可通过调整电镀工艺的时间,可获得具有不同比例构成的钴-镍-磷磁性合金复合纤维;
(3)与传统制备方法相比,可制备超长的钴-镍-磷复合纤维,纤维长度不受本工艺条件的限制,仅取决于原聚合物纤维的长度;
(4)采用复合纤维结构制备电磁波吸收剂时,有利于减轻材料的重量,并由于复合界面的不平整导致的反射和散射,进一步增强复合材料的吸波性能;
(5)可把复合纤维来回缠绕于架子之上用作于液态与气态反应的催化剂,既增大了反应面积,又保证了反应物质的流动与交换,可极大提高催化效率。
具体实施方式:
以下结合实施例对本发明作进一步说明:
实施例1:钴-镍-磷磁性复合纤维的成形工艺
(1)纤维的表面处理:采用φ0.01 mm的聚丙烯纤维,采用氢氧化钠溶液进行化学除油脱脂;
(2)粗化的水溶液配比为80g/L 铬酐、300ml/L 硫酸,粗化处理温度为60℃,粗化处理时间20min;
(3)纤维的敏化,敏化液组成为氯化锡8g/L,盐酸40ml/L ,敏化处理时间3min;
(4)采用硝酸银和氨水溶液进行纤维表面的活化,活化后的纤维经甲醛溶液还原;
(5) 纤维的化学镀钴-镍-磷合金,溶液组成为:硫酸钴0.15mol/L,硫酸镍0.08mol/L,次磷酸钠0.2mol/L,羧酸盐0.15 mol/L,铵盐5g /L,滴定氨水溶液Ph值为8.5,化学镀时溶液温度为75℃,化学镀时间为0.5min;
(6) 纤维电刷镀钴-镍-磷合金
电刷镀溶液组成:可溶性钴盐2.5mol/L(优选2-3.5mol/L)、硼酸0.6 mol/L、可溶性镍盐0.7 mol/L、亚磷酸或次磷酸盐0.55 mol/L、柠檬酸钠5g/L、糖精1 g/L、余量水;
制备工艺参数为:阳极采用石墨板,电极的电流密度为0.05A/mm2,电刷镀纤维,电极相对运动速度为10m/min,滴定强酸溶液使镀液Ph值1-3,施镀温度为45℃。
实施例2:钴-镍-磷磁性复合纤维的成形工艺
(1)纤维的表面处理:采用φ0.01 mm的聚丙烯纤维,采用氢氧化钠溶液进行化学除油脱脂;
(2)粗化的水溶液配比为65g/L 铬酐、250ml/L 硫酸,粗化处理温度为60℃,粗化处理时间30min;
(3)纤维的敏化,敏化液组成为氯化锡6.5g/L,盐酸30ml/L ,敏化处理时间2min;
(4)采用硝酸银和氨水溶液进行纤维表面的活化,活化后的纤维经甲醛溶液还原;
(5) 纤维的化学镀钴-镍-磷合金,溶液组成为:硫酸钴0.1mol/L,硫酸镍0.05mol/L,次磷酸钠0.1mol/L,羧酸盐0.2 mol/L,铵盐8g /L,滴定氨水溶液Ph值为9,化学镀时溶液温度为70℃,化学镀时间为0.5min;
(6) 纤维电刷镀钴-镍-磷合金
电刷镀溶液组成:可溶性钴盐3mol/L(优选2-3.5mol/L)、磷酸0.4mol/L、可溶性镍盐1mol/L、亚磷酸0.4mol/L、 糖精4g/L、余量水;
制备工艺参数为:阳极采用石墨板,电极的电流密度为0.1A/mm2,电刷镀纤维,电极相对运动速度为5m/min,滴定强酸溶液使镀液Ph值3,施镀温度为50℃。
Claims (4)
1.一种钴-镍-磷非晶合金复合纤维,其特征在于,纤维长度可连续,复合纤维断面为圆形、异形等形状,复合纤维的外径为0.01-0.2mm,复合纤维芯丝直径为0.005-0.08mm;复合纤维的包覆层为钴-镍-磷磁性金属,具体成分为Co为40-85%,Ni为10-20%,P为6-20%,复合纤维的芯丝材质为聚合物。
2.一种钴-镍-磷磁性复合纤维的制备方法,其特征在于,生产步骤为:(1) 采用碱性溶液,对聚合物纤维进行除油脱脂;(2) 采用铬酐和硫酸溶液进行纤维表面的粗化; (3) 采用酸性的锡盐溶液进行纤维的敏化; (4) 采用硝酸银和氨水溶液进行纤维表面的活化;(5) 纤维的化学镀钴-镍-磷合金;(6) 纤维电刷镀钴-镍-磷合金。
3.权利要求2所述,化学镀镀液组成为:硫酸钴0.05-0.5mol/L,硫酸镍0.05-0.5mol/L,次磷酸钠0.1-0.3mol/L,羧酸盐0.1-0.5mol/L,添加剂5-15g/L,滴定氨水溶液Ph值为8-10,化学镀时溶液温度为50-85℃,化学镀时间为0.5-2min。
4.权利要求2所述,电刷镀镀液组成为:可溶性钴盐1-4.5mol/L(优选2-3.5mol/L)、酸0.2-1mol/L、可溶性镍盐0.2-1.5mol/L、亚磷酸或次磷酸盐0.3-1.2mol/L, 络合剂0.5-15g/L、余量水;
上述酸包括硼酸、磷酸、羧酸等多元中强酸;
上述络合剂包括糖精、羧酸盐等;
其制备工艺参数为:阳极采用石墨板,电极的电流密度为0.05-0.5A/mm2,在布线平面两侧电刷镀纤维,电极相对运动速度为5-20m/min(优选10-15m/min),滴定强酸溶液使镀液Ph值1-3,施镀温度为30-80℃。
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