CN110534235A - 一种三代核电站严酷环境用电缆 - Google Patents
一种三代核电站严酷环境用电缆 Download PDFInfo
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Abstract
本发明公开了一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;其中,绝缘层的原料按重量份包括:聚乙烯70‑80份,乙烯‑醋酸乙烯共聚物30‑40份,改性蒙脱土10‑20份,抗冲击改性剂10‑15份,阻燃剂40‑60份,马来酸酐接枝聚乙烯相容剂1‑3份,三烯丙基羟脲酸酯0.2‑0.5份,增塑剂1‑2份,石蜡2‑3份,抗氧剂1‑1.5份,抗辐照剂1‑2份。本发明具有良好的阻燃、抗辐射和机械性能。
Description
技术领域
本发明涉及塑料技术领域,尤其涉及一种三代核电站严酷环境用电缆。
背景技术
自1954年前苏联建成电功率为5兆瓦的实验性核电站以来,核电技术不断进步,其发展进程可以划分为第一、二、三、四代。第一代核电站是指各国在上世纪五十年代开发建设的实验性原型核电站,证明了利用核能发电的技术可行性;第二代核电站是指上世纪七十年代到现在正在运行的大部分商业核电站,它证明了发展核电站在商业运行上是可行的,也使世界核电得到了较快发展;第三代核电站技术是指满足《美国用户要求文件(URD)》或《欧洲用户要求文件(EUR)》,具有更高安全性的新一代先进核电站技术;第四代核电技术是指目前正进行概念设计和研究开发的,在反应堆和燃料循环方面有重大创新的核电站,其安全性和经济性更加优越、废物量较少、无需厂外应急、具有防扩散能力。
第三代核电站的安全性明显优于第二代核电站。由于安全是核电发展的前提,世界各国除了对正在运行的第二代机组进行延寿与补充性建一些二代加的机组外,目前新一批的核电建设重点是采用更安全、更先进的第三代核电机组。由中国国家核电技术公司(现国家电力投资集团公司)引进的美国非能动AP1000核电站、中国广核集团公司引进的法国EPR核电站以及国家电力投资集团公司自主研发的CAP1400核电站都属于第三代核电站。
电缆是核电站运行必不可少的一环,由于核电站电缆常在高温环境下工作,因此电缆绝缘层、外护套层等电缆料需要具有长期耐热使用性能,要选用耐热性满足要求的聚合物;核电站用电缆受到大量射线时会使绝缘和护套材料变脆,力学性能变差,因此,作为核电站电缆用的绝缘和护套材料,必须具有优良的耐辐照性。
第三代核电站对电缆料提出了更高的耐辐照性能、耐热性和阻燃性能,以及低烟、无卤、低毒等特点。然而能生产该产品的企业却较少,为了保证核电站的正常运行和安全,需要提供耐三代核电站严酷环境的电缆。
发明内容
基于背景技术存在的技术问题,本发明提出了一种三代核电站严酷用环境电缆,本发明的绝缘层具有良好的阻燃、抗辐射和机械性能。
本发明提出的一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯70-80份,乙烯-醋酸乙烯共聚物30-40份,改性蒙脱土10-20份,抗冲击改性剂10-15份,阻燃剂40-60份,马来酸酐接枝聚乙烯相容剂1-3份,三烯丙基羟脲酸酯0.2-0.5份,增塑剂1-2份,石蜡2-3份,抗氧剂1-1.5份,抗辐照剂1-2份。
优选地,在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至55-60℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌4-6h,乳化,滴加丙烯酸甲酯,保温搅拌3-5h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂。
优选地,在抗冲击改性剂的制备过程中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕。
优选地,在抗冲击改性剂的制备过程中,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为1-2:100-120:12-12.5:13.5-14:11-13:0.3-0.35:22-25。
优选地,阻燃剂为氢氧化镁、硼酸锌、三聚氰胺。
优选地,氢氧化镁、硼酸锌、三聚氰胺的重量比为3-5:0.2-0.4:0.6-0.8。
优选地,抗辐照剂为氮化硼和稀土氧化物,其中,氮化硼和稀土氧化物的重量比为0.8-1.5:0.2-0.5。
优选地,抗氧剂为3,5-二乙基甲苯二胺和N’,N-二苯基对苯二胺。
优选地,增塑剂为苯二甲酸二丁酯。
优选地,改性蒙脱土为乙烯基三乙氧基硅烷偶联剂改性蒙脱土。
上述绝缘层材料的制备方法为:将聚乙烯、乙烯-醋酸乙烯共聚物、改性蒙脱土、抗冲击改性剂、阻燃剂、马来酸酐接枝聚乙烯相容剂、三烯丙基羟脲酸酯、增塑剂、石蜡、抗氧剂、抗辐照剂共混,密炼,再经双螺杆挤出机挤出,然后辐照得到三代核电站严酷环境用电缆的绝缘层材料。
本发明选用聚乙烯、乙烯-醋酸乙烯共聚物以合适比例配合,作为绝缘层材料的主料,增加聚乙烯的机械性能;选用乙烯基三乙氧基硅烷偶联剂改性蒙脱土与聚乙烯、乙烯-醋酸乙烯共聚物以适宜比例复配,在增加绝缘材料机械性能的同时,可以增加绝缘材料的卡维软化点,提高其耐高温性能;选用DOPO、磷酸二(丙烯酸羟乙基)酯与丙烯酸丁酯、丙烯酸甲酯以合适比例加成共聚得到抗冲击改性剂,在抗冲击改性剂中引入了适宜含量的磷元素,而抗冲击改性剂与聚乙烯、乙烯-醋酸乙烯共聚物可以均匀分散,能大大增加绝缘材料的机械性能,并能时磷元素均匀分散在聚乙烯、乙烯-醋酸乙烯共聚物中,大大增加绝缘材料的阻燃性;选用氢氧化镁、硼酸锌、三聚氰胺以合适比例复配作为阻燃剂,与抗冲击改性剂相互配合,可以进一步增加绝缘材料的阻燃性,且低烟、无卤、低毒;氮化硼和稀土氧化物可以增加绝缘材料的抗辐射性能;3,5-二乙基甲苯二胺、N’,N-二苯基对苯二胺与氮化硼、稀土氧化物相互配合可以进一步增加绝缘材料的抗辐射性能;苯二甲酸二丁酯可以进一步调节绝缘材料的机械性能;石蜡与马来酸酐接枝聚乙烯相容剂、抗冲击改性剂相互配合可以促进各物质均匀分散,进一步增加绝缘材料的机械性能;苯二甲酸二丁酯和石蜡也能提高本发明的抗辐射性能;上述各物质相互配合使得本发明具有良好的阻燃、抗辐射和机械性能。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
实施例1
一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯75份,乙烯-醋酸乙烯共聚物35份,改性蒙脱土15份,抗冲击改性剂12份,阻燃剂50份,马来酸酐接枝聚乙烯相容剂2份,三烯丙基羟脲酸酯0.35份,增塑剂1.5份,石蜡2.5份,抗氧剂1.2份,抗辐照剂1.5份。
实施例2
一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯70份,乙烯-醋酸乙烯共聚物40份,乙烯基三乙氧基硅烷偶联剂改性蒙脱土10份,抗冲击改性剂15份,阻燃剂40份,马来酸酐接枝聚乙烯相容剂3份,三烯丙基羟脲酸酯0.2份,苯二甲酸二丁酯2份,石蜡2份,抗氧剂1.5份,抗辐照剂1份;
在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至60℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌4h,乳化,滴加丙烯酸甲酯,保温搅拌5h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂,其中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为1:120:12:14:11:0.35:22。
实施例3
一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯80份,乙烯-醋酸乙烯共聚物30份,乙烯基三乙氧基硅烷偶联剂改性蒙脱土20份,抗冲击改性剂10份,阻燃剂60份,马来酸酐接枝聚乙烯相容剂1份,三烯丙基羟脲酸酯0.5份,苯二甲酸二丁酯1份,石蜡3份,抗氧剂1份,抗辐照剂2份;
在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至55℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌6h,乳化,滴加丙烯酸甲酯,保温搅拌3h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂,其中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为2:100:12.5:13.5:13:0.3:25;
阻燃剂为氢氧化镁、硼酸锌、三聚氰胺,其中,氢氧化镁、硼酸锌、三聚氰胺的重量比为3:0.4:0.6;
抗辐照剂为氮化硼和稀土氧化物,其中,氮化硼和稀土氧化物的重量比为1.5:0.2;
抗氧剂为3,5-二乙基甲苯二胺和N’,N-二苯基对苯二胺。
实施例4
一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯72份,乙烯-醋酸乙烯共聚物38份,乙烯基三乙氧基硅烷偶联剂改性蒙脱土13份,抗冲击改性剂13份,阻燃剂45份,马来酸酐接枝聚乙烯相容剂2.5份,三烯丙基羟脲酸酯0.3份,苯二甲酸二丁酯1.8份,石蜡2.2份,抗氧剂1.3份,抗辐照剂1.2份;
在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至58℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌4.5h,乳化,滴加丙烯酸甲酯,保温搅拌4.5h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂,其中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为1.2:115:12.1:13.8:11.5:0.34:23;
阻燃剂为氢氧化镁、硼酸锌、三聚氰胺,其中,氢氧化镁、硼酸锌、三聚氰胺的重量比为5:0.2:0.8;
抗辐照剂为氮化硼和稀土氧化物,其中,氮化硼和稀土氧化物的重量比为0.8:0.5;
抗氧剂为3,5-二乙基甲苯二胺和N’,N-二苯基对苯二胺。
实施例5
一种三代核电站严酷环境用电缆,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯78份,乙烯-醋酸乙烯共聚物32份,乙烯基三乙氧基硅烷偶联剂改性蒙脱土17份,抗冲击改性剂11份,阻燃剂55份,马来酸酐接枝聚乙烯相容剂1.5份,三烯丙基羟脲酸酯0.4份,苯二甲酸二丁酯1.2份,石蜡2.8份,抗氧剂1.1份,抗辐照剂1.8份;
在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至56℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌5.5h,乳化,滴加丙烯酸甲酯,保温搅拌3.5h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂,其中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为1.8:105:12.3:13.6:12.5:0.32:24;
阻燃剂为氢氧化镁、硼酸锌、三聚氰胺,其中,氢氧化镁、硼酸锌、三聚氰胺的重量比为4:0.3:0.7;
抗辐照剂为氮化硼和稀土氧化物,其中,氮化硼和稀土氧化物的重量比为1.2:0.4;
抗氧剂为3,5-二乙基甲苯二胺和N’,N-二苯基对苯二胺。
对照例1:不加抗冲击改性剂,其他同实施例5绝缘层配方。
对照例2:不加乙烯基三乙氧基硅烷偶联剂改性蒙脱土,其他同实施例5绝缘层配方。
试验例1
检测实施例5、对照例1-2的绝缘层性能,结果如下:
由上表可以看出,本发明的绝缘材料具有良好阻燃、抗辐射和机械性能。
以上所述,仅为本发明较佳的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种三代核电站严酷环境用电缆,其特征在于,包括:导线、绝缘层、填充层、绕包层、屏蔽层、铠装层和外护套层,其中,绝缘层包覆于导线表面,填充层包覆于绝缘层表面,绕包层包覆于填充层表面,屏蔽层包覆于绕包层表面,铠装层包覆于屏蔽层表面,外护套层包覆于铠装层表面;
其中,绝缘层的原料按重量份包括:聚乙烯70-80份,乙烯-醋酸乙烯共聚物30-40份,改性蒙脱土10-20份,抗冲击改性剂10-15份,阻燃剂40-60份,马来酸酐接枝聚乙烯相容剂1-3份,三烯丙基羟脲酸酯0.2-0.5份,增塑剂1-2份,石蜡2-3份,抗氧剂1-1.5份,抗辐照剂1-2份。
2.根据权利要求1所述三代核电站严酷环境用电缆,其特征在于,在抗冲击改性剂的制备过程中,在氮气氛围中,将OP-10、DOPO加入乙醇中溶解,升温至55-60℃,加入磷酸二(丙烯酸羟乙基)酯,然后滴加丙烯酸丁酯,再加入偶氮二异丁腈,保温搅拌4-6h,乳化,滴加丙烯酸甲酯,保温搅拌3-5h,破乳,离心,用水和乙醇洗涤沉淀,干燥得到抗冲击改性剂。
3.根据权利要求2所述三代核电站严酷环境用电缆,其特征在于,在抗冲击改性剂的制备过程中,丙烯酸丁酯和丙烯酸甲酯均在1h以内滴加完毕。
4.根据权利要求2或3所述三代核电站严酷环境电缆,其特征在于,在抗冲击改性剂的制备过程中,OP-10、乙醇、DOPO、磷酸二(丙烯酸羟乙基)酯、丙烯酸丁酯、偶氮二异丁腈、丙烯酸甲酯的重量比为1-2:100-120:12-12.5:13.5-14:11-13:0.3-0.35:22-25。
5.根据权利要求1-4任一项所述三代核电站严酷环境电缆,其特征在于,阻燃剂为氢氧化镁、硼酸锌、三聚氰胺。
6.根据权利要求5所述三代核电站严酷环境电缆,其特征在于,氢氧化镁、硼酸锌、三聚氰胺的重量比为3-5:0.2-0.4:0.6-0.8。
7.根据权利要求1-6任一项所述三代核电站严酷环境电缆,其特征在于,抗辐照剂为氮化硼和稀土氧化物,其中,氮化硼和稀土氧化物的重量比为0.8-1.5:0.2-0.5。
8.根据权利要求1-7任一项所述三代核电站严酷环境电缆,其特征在于,抗氧剂为3,5-二乙基甲苯二胺和N’,N-二苯基对苯二胺。
9.根据权利要求1-8任一项所述三代核电站严酷环境电缆,其特征在于,增塑剂为苯二甲酸二丁酯。
10.根据权利要求1-9任一项所述三代核电站严酷环境电缆,其特征在于,改性蒙脱土为乙烯基三乙氧基硅烷偶联剂改性蒙脱土。
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