CN108178866B - 一种远红外辐射发热pe-rt管 - Google Patents
一种远红外辐射发热pe-rt管 Download PDFInfo
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Abstract
本发明涉及远红外辐射发热PE‑RT管,用于低温地板辐射采暖、墙壁采暖及天棚采暖系统,其特征在于管道采用双层复合结构,管道内层为Ⅰ型或Ⅱ型PE‑RT,管道外层采用远红外辐射发热复合材料。本发明的优点是内层结构保证产品在采暖温度下具有优异的静液压强度和使用寿命,外层结构可产生波长为0.4‑40μm的远红外线,发射率大于0.87,该红外线可显著提升采暖效率,降低能耗,改善人体血液循环和大气环境。
Description
【技术领域】
本发明涉及PE-RT管道改性技术,具体地说,是一种在采暖过程中的远红外辐射发热PE-RT管。
【技术背景】
随着我国经济的发展和人民生活水平的提高,环保、舒适、健康的采暖方式成为越来越多人的需求,北方的集中供暖和南方是否需要采暖成为焦点。低温地板辐射采暖凭借房间温度分布均匀、节省建筑空间、使用寿命长及环保健康等优势逐步取代散热器采暖,雨后春笋般的占领了市场。在地暖管道产品中,Ⅰ型PE-RT和Ⅱ型PE-RT的份额高于53%,占据了管道产品市场的半壁江山。但PE-RT导热系数低,热量辐射效率慢,大量热能浪费在供回水路上;且随着采暖范围的扩大,采暖和空气污染的矛盾问题也日益突出,前两年北方区域连续出现“雾霾”天,对人的身体和心理造成严重影响。
为解决上述问题,国家加大环境综合治理力度,倡导节能环保。同时,国家能源局会同财政、环保、住房城乡建设等相关部门编制《北方地区冬季清洁取暖规划(2017年~2021年)》,从环境保护和能源利用效率的角度出发,提倡采用新技术,在保证采暖效果的前提下促进节能减排。
【发明内容】
本发明的目的是克服现有PE-RT管道的热辐射效率低,提供一种可辐射波长为0.4-40μm远红外线的PE-RT采暖管道。
本发明的内容的实现主要通过下述技术方案:
一种远红外辐射发热PE-RT管道,其特征在于,由外层和内层复合共挤而成;其中内层的材料为Ⅰ型PE-RT或Ⅱ型PE-RT材料;外层为远红外辐射发热复合材料。
PE-RT为耐热聚乙烯。
所述的远红外辐射发热复合材料,其原料的质量百分比为:5~10%的石墨烯,1~3%的二氧化锆,2~5%的陶瓷粉,1~2%的三氧化二钴,4~10%的相容剂,及0.5%抗氧剂,PE-RT为余量。
所述的石墨烯,二氧化锆,陶瓷粉,三氧化二钴的粒径范围分别为50~200nm,100~500nm,10~100nm,80~400nm;远红外粉体均为纳米级。
偶联剂为硅烷偶联剂、钛酸酯偶联剂及铝酸酯偶联剂中的一种或几种。
相容剂为马来酸酐接枝PE、马来酸酐接枝POE或马来酸酐接枝LLDPE中的一种或几种,接枝率≥0.6%,熔体流动速率≥0.5g/10min(5kg,190℃)。
所述的远红外粉体在复合前进行表面改性处理,将偶联剂在PH=4的无水乙醇和水的溶液中,无水乙醇与水的体积比为3:1,超声分散20~30分钟;然后加入石墨烯,二氧化锆,陶瓷粉及三氧化二钴粉体,超声分散10~20分钟,在65~70℃的水浴中反应35~45分钟;最后放入烘箱干燥1~60分钟,得到表面改性处理的远红外粉体。
所述的远红外辐射发热复合材料,其制备方法为:采用密炼机将表面改性处理后的远红外粉体、PE-RT、相容剂混炼均匀,然后采用双螺杆造粒机进行造粒,造粒机长径比≥40:1。
一种远红外辐射发热PE-RT管道,其制备方法为:采用两台单螺杆挤出机共同挤出,挤出机加工温度为170~190℃,管道内外层壁厚的比例为9:1~10:1。
与现有技术相比,本发明的积极效果是:
1.本发明所制备的PE-RT管材在采暖过程中,显著增大了试样在40℃全波长和分段波长远红外的发射率,而0.4-40μm波段的电磁波可提供人体细胞组织所需要的微弱能量,能提升人的体感温度,从而提升室内采暖效率。其次,远红外线是一种对人体有益的光,远红外线对细胞的共振效用、渗透作用、温热效果在养生健康行业得到广泛应用。
2.本发明所制备的PE-RT管材在30~50℃时,可辐射波长在0.4-40μm的远红外线,且发射率大于0.87。
3.本发明通过加入酸酐接枝物,增强了远红外辐射发热复合材料不同成分之间的界面结合力度,使得远红外功能粉在基体中分散的更加均一。
【附图说明】
图1为远红外辐射发热PE-RT管的径向和轴向剖面图;1a为径向剖面图,1b为轴向剖面图;
附图中的标号分别为:1、Ⅰ型PE-RT或Ⅱ型PE-RT内层;2、远红外辐射发热外层;
【具体实施方式】
以下提供本一种远红外辐射发热PE-RT管的具体实施方式。
首先,将偶联剂在PH=4的溶液(无水乙醇:水=3:1)中,超声分散20~30分钟,加入纳米级石墨烯、二氧化锆、陶瓷粉和三氧化二钴粉体,超声分散10~20分钟,在65~70℃的水浴中反应35~45分钟,最后放入烘箱干燥1~60分钟,装袋备用。
然后,将PE-RT、表面改性后的远红外粉体和界面相容剂按一定的比例添加到密炼机中混炼均匀,采用长径比为40:1的双螺杆造粒机,在工艺温度为170~190℃的条件下进行反应造粒,造粒后的粒子为生产管道外层的原料。
最后,采用两台挤出机共同挤出成型,一台挤出机采用Ⅰ型PE-RT或Ⅱ型PE-RT作为原料挤出内管;一台挤出机采用造粒后的粒料作为原料挤出外管,两台挤出机的熔体在模具中按内层与外层壁厚的比例为9:1~10:成型为双层管材结构。
实施例1
一种远红外辐射发热PE-RT管,内层壁厚占总壁厚的90%,外层壁厚占总壁厚的10%。内层采用Ⅰ型PE-RT,外层复合材料的配方为偶联剂采用硅烷偶联剂KH570,相容剂为马来酸酐接枝聚乙烯5%、石墨烯8%、二氧化锆1%、陶瓷粉3%、三氧化二钴1%,抗氧剂0.5%,PE-RT载体81.5%。
经检测,样品远红外波长范围为0.9~18μm,在温度为30℃时,红外发射率为0.88。
实施例2
一种远红外辐射发热PE-RT管,内层壁厚占总壁厚的90%,外层壁厚占总壁厚的10%。内层采用Ⅱ型PE-RT,外层复合材料的配方为偶联剂采用硅烷偶联剂KH570,相容剂为马来酸酐接枝聚乙烯7.2%、石墨烯9%、二氧化锆3%、陶瓷粉5%、三氧化二钴2%,抗氧剂0.5%,PE-RT载体73.3%。
经检测,样品远红外波长范围为0.6~32μm,在温度为45℃时,红外发射率为0.93。
以上所述仅是本发明的2种实施方式,应当指出,在不脱离本发明构思的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围内。
Claims (5)
1.一种远红外辐射发热PE-RT管道,其特征在于,由外层和内层复合共挤而成;其中内层的材料为Ⅰ型PE-RT或Ⅱ型PE-RT材料;外层为远红外辐射发热复合材料;
所述的远红外辐射发热复合材料,其原料的质量百分比为:5~10%的石墨烯,1~3%的二氧化锆,2~5%的陶瓷粉,1~2%的三氧化二钴,4~10%的相容剂,及0.5%抗氧剂, PE-RT为余量;
所述的石墨烯,二氧化锆,陶瓷粉,三氧化二钴的粒径范围分别为50~200nm,100~500nm,10~100nm,80~400nm。
2.根据权利要求1所述的一种远红外辐射发热PE-RT管道,其特征在于,所述的相容剂为马来酸酐接枝PE、马来酸酐接枝POE或马来酸酐接枝LLDPE中的一种或几种,接枝率≥0.6%,熔体流动速率≥0.5g/10min。
3.根据权利要求1所述的一种远红外辐射发热PE-RT管道,其特征在于,远红外辐射发热复合材料中的远红外粉体,远红外粉体为石墨烯,二氧化锆,陶瓷粉及三氧化二钴粉体;
远红外粉体在复合前进行表面改性处理,将偶联剂在PH=4的无水乙醇和水的溶液中,无水乙醇与水的体积比为3:1,超声分散20~30分钟,加入石墨烯,二氧化锆,陶瓷粉及三氧化二钴粉体,超声分散10~20分钟,在65~70℃的水浴中反应35~45分钟,最后放入烘箱干燥1~60分钟,得到表面改性的远红外粉体。
4.根据权利要求3所述的一种远红外辐射发热PE-RT管道,其特征在于,所述的远红外辐射发热复合材料,其制备方法为:采用密炼机将表面改性处理后的远红外粉体,PE-RT,相容剂混炼均匀,然后采用双螺杆造粒机进行造粒,造粒机长径比≥40:1。
5.根据权利要求1所述的一种远红外辐射发热PE-RT管道的制备方法,其特征在于,对原料采用两台单螺杆挤出机共同挤出,挤出机加工温度为170~190℃,管道内外层壁厚的比例为9:1~10:1。
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