CN114836113A - 一种水性纳米耐高温保温隔热材料以及制备方法 - Google Patents
一种水性纳米耐高温保温隔热材料以及制备方法 Download PDFInfo
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Abstract
本发明公开了一种水性纳米耐高温保温隔热材料,由下述组分按质量百分比制成:水性树脂16‑22%、红外反射颜料3‑10%、二氧化硅气凝胶3‑26%、空心微珠19‑26%、水18‑38%、乳液6‑10%、助剂2‑5%;本发明添加镀钛纳米陶瓷空心微珠作为填料,镀钛纳米陶瓷空心微珠内部为气体,导热系数低,可以使涂料具有良好的隔热、保温性能,同时添加的苯乙烯和丙烯酸酯的共聚乳液可以填充镀钛纳米陶瓷空心微珠之间的缝隙,使涂料各组分之间连接更紧密,可以提高涂料的光反射率,添加远红外陶瓷粉与尖晶石粉制备的红外反射颜料使涂料具有较高的光反射率,可以减少材料表面的得热,从而达到隔热目的,添加的二氧化硅气凝胶为4%时涂料的附着力较好,且导热率低,可以降低二氧化硅气凝胶的用量。
Description
技术领域
本发明涉及涂料生产领域,尤其涉及一种水性纳米耐高温保温隔热材料以及制备方法。
背景技术
当前,世界能源紧缺问题日益严峻,各行各业对节能减排的要求越来越高。在建筑领域,因其能耗约占全社会总能耗30%,且仅仅是建筑物在建造和使用过程中消耗的能源比例,如果再加上建材生产过程中耗掉的能源,建筑相关能耗将占到社会总耗能的46.7%。建筑节能对实现“双碳”目标十分重要。
建筑保温隔热是减少能耗的重要措施之一,保温隔热涂料作为一种新型涂料,凭借其自身隔热节能、施工便利、适应性强等优势,在实现建筑节能过程中发挥了越来越强大的作用。然而,随着国民经济的发展和科学技术的进步,人们对保温隔热涂料的要求越来越高,薄薄一层的保温隔热涂料能否为建筑穿上防护外衣,成为值得思考的问题。
保温隔热的方法主要集中于两个类别:基于热传导原理的阻传导技术,基于表面反射原理的光反射技术;传导是热量传递的主要路径之一;
所谓“阻传导”是通过增加传导阻力、减缓热量在墙体两端的传递速度。采用导热系数较低的材料,减缓墙面两端由温差引起的热量传导,是这类材料的技术策略,最为典型也是应用最为广泛的是以各类由聚苯乙烯制成的保温材料。各类保温砂浆、保温腻子、无机发泡材料、气凝胶材料和岩棉保温材料,均采取同样的技术路径;
光反射技术在建筑隔热节能上应用,是基于太阳通过光辐射产生地球上主要热量来源的事实,以及“环境中的热量主要来自于太阳照射”的认知。根据物理学光反射原理,入射在材料表面的太阳辐射能被吸收、透射或反射,其吸收率a、透射率r和反射率p之间有如下的关系atr+p=1。在此前提下,通过提高材料表面对太阳光的反射率以减少材料表面的得热,从而达到隔热目的,是光反射技术的基本策略。
现有的水性纳米保温隔热涂料中的SiO气凝胶在一定范围内的添加量越大制备出的涂料隔热性能就越好,随着SiO气凝胶使用量的增大,导热系数下降,但是增加SiO气凝胶的用量,可能会导致其他原料的性能发生改变,且目前市场上没有将阻传导与光反射技术结合制备的保温隔热涂料。
发明内容
本发明的目的是提供一种水性纳米耐高温保温隔热材料以及制备方法,解决了上述问题。
为了达到上述目的,本发明是通过以下技术方案实现的:
本发明提供一种水性纳米耐高温保温隔热材料,由下述组分按质量百分比制成:水性树脂16-22%、红外反射颜料3-10%、二氧化硅气凝胶3-26%、空心微珠19-26%、水18-28%、乳液6-10%、助剂5-8%;
其中:所述水性树脂包括:水溶性酚醛改性醇酸树脂、水性聚氨酯树脂,所述红外反射颜料为远红外陶瓷粉与尖晶石粉的烧结物,所述空心微珠为镀钛纳米陶瓷空心微珠,所述镀钛纳米陶瓷空心微珠的制备方法为:将纳米陶瓷空心微珠混于装有去离子水的反应釜中,调整体系pH值和温度,控制pH值在2.4-2.7之间,控制温度为:80-90℃,缓慢滴加钛盐溶液,同时使用NaOH始终维持体系的pH值在2.4-2.7之间,滴加结束后,提高体系温度至90-98℃,继续反应1-2h后进行过滤,洗涤滤饼,滤饼在干燥箱中以110-130℃干燥2-4h后在马沸炉中煅烧2-3h,得到镀钛纳米陶瓷空心微珠。
优选的,所述红外反射颜料的制备方法为:通过电熔法或烧结法制备尖晶石备用,将20-31%尖晶石、16-20%石英、11-19%硼砂、23-31滑石粉、2-4%聚丙烯酰胺、余量为水,将尖晶石、石英、硼砂、滑石粉、滑石粉作为原料混合均匀,经湿法球磨14-28小时得到浆液,将浆液过100-180目筛后加入絮凝剂进行选择性絮凝,除掉絮凝物,干燥后在氧化性气氛下进行烧制,烧制阶段为:第一阶段:320~580℃下烧制20-40min,第二阶段:600~720℃下烧制30-42min,第三阶段:750~900℃下烧制50-60min,第四阶段:920~1100℃下烧制50-62min,第五阶段:1100~1250℃下烧制20-30min,然后随炉冷却至室温,将烧结后的混合料经干法球磨20-30小时,最后过200-320目筛得到红外反射颜料。
优选的,所述尖晶石包括:镁尖晶石、铁尖晶石、锌尖晶石、锰尖晶石。
优选的,所述絮凝剂为聚丙烯酰胺。
优选的,所述助剂包括乳化剂0.6-1.1%、增稠剂0.5-0.9%、颜料分散剂0.7-1.5%、消泡剂0.5-0.1.1%、流平剂0.2-0.5%,所述颜料分散剂选自日本诺普科助剂有限公司,所述增稠剂选自广州市沛凌贸易有限公司,规格为RM-2020,所述消泡剂选自广州市淬凌贸易有限公司,规格为:NXZ。
优选的,所述镀钛纳米陶瓷空心微珠制备过程中钛盐溶液滴加时间为3-5h,所述反应釜的搅拌速度为50-60r/min。
优选的,所述乳液为苯乙烯和丙烯酸酯的共聚乳液。
优选的,所述二氧化硅气凝胶为4%。
一种水性纳米耐高温保温隔热材料的制备方法,采用上述的水性纳米耐高温保温隔热材料进行制备:具体包括以下步骤:
(1)、将水、红外反射颜料、颜料分散剂加入分散缸中搅拌均匀,搅拌速度为120-160r/min,搅拌时间为5-10min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠、助剂、乳液缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为40-50r/min,搅拌时间为40-60min,得到混合物B;
(3)、将二氧化硅气凝胶、水性树脂加入步骤2得到的混合物B中继续以40-50r/min的转速搅拌20-30min得到所述的水性纳米耐高温保温隔热材料。
本发明的有益效果:
(1)、本发明添加镀钛纳米陶瓷空心微珠作为填料,镀钛纳米陶瓷空心微珠内部为气体,导热系数低,可以使涂料具有良好的隔热、保温性能,同时添加的苯乙烯和丙烯酸酯的共聚乳液可以填充镀钛纳米陶瓷空心微珠之间的缝隙,使涂料各组分之间连接更紧密,可以提高涂料的光反射率。
(2)、本发明通过添加远红外陶瓷粉与尖晶石粉制备的红外反射颜料使涂料具有较高的光反射率,可以减少材料表面的得热,从而达到隔热目的。
(3)、本发明添加的二氧化硅气凝胶为4%时涂料的附着力较好,且导热率低,在保证具有良好保温隔热的前提下可以降低二氧化硅气凝胶的用量。
(4)、本发明添加的水性树脂具有耐高温的作用。
具体实施方式
下面结合实施例,对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
实施例1
制备方法具体步骤如下:
(1)、将26%水、红外反射颜料4%、颜料分散剂0.8%加入分散缸中搅拌均匀,搅拌速度为120r/min,搅拌时间为8min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠19%、乳化剂0.6%、增稠剂0.8%、消泡剂0.5%、流平剂0.3%、乳液8%缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为45r/min,搅拌时间为50min,得到混合物B;
(3)、将二氧化硅气凝胶26%、水性树脂16%加入步骤2得到的混合物B中继续以45r/min的转速搅拌27min得到所述的水性纳米耐高温保温隔热材料。
实施例2
制备方法具体步骤如下:
(1)、将18%水、红外反射颜料10%、颜料分散剂0.8%加入分散缸中搅拌均匀,搅拌速度为120r/min,搅拌时间为8min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠19%、乳化剂0.6%、增稠剂0.8%、消泡剂0.5%、流平剂0.3%、乳液8%缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为45r/min,搅拌时间为50min,得到混合物B;
(3)、将二氧化硅气凝胶26%、水性树脂16%加入步骤2得到的混合物B中继续以45r/min的转速搅拌27min得到所述的水性纳米耐高温保温隔热材料。
实施例3
制备方法具体步骤如下:
(1)、将38%水、红外反射颜料4%、颜料分散剂0.8%加入分散缸中搅拌均匀,搅拌速度为120r/min,搅拌时间为8min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠19%、乳化剂0.6%、增稠剂0.8%、消泡剂0.5%、流平剂0.3%、乳液10%缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为45r/min,搅拌时间为50min,得到混合物B;
(3)、将二氧化硅气凝胶4%、水性树脂22%加入步骤2得到的混合物B中继续以45r/min的转速搅拌27min得到所述的水性纳米耐高温保温隔热材料。
实施例4
制备方法具体步骤如下:
(1)、将32%水、红外反射颜料10%、颜料分散剂0.8%加入分散缸中搅拌均匀,搅拌速度为120r/min,搅拌时间为8min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠19%、乳化剂0.6%、增稠剂0.8%、消泡剂0.5%、流平剂0.3%、乳液10%缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为45r/min,搅拌时间为50min,得到混合物B;
(3)、将二氧化硅气凝胶4%、水性树脂22%加入步骤2得到的混合物B中继续以45r/min的转速搅拌27min得到所述的水性纳米耐高温保温隔热材料。
对比例:
以中国发明专利:一种超疏水自清洁保温隔热建筑物外墙涂料,专利号为:CN108997873 B实施例1作为对比。
为进一步验证本发明的技术效果,将本发明实施例将制备出的样品涂在水泥板做成的样板上,图层厚度均为20/μm,分别进行如下测试,测试结果与对比例进行比较,其中各项检测依据或标准为:
(1)表干时间:检验依据GB/T 1728——1979(1989);(2)实干时间:检验依据GB/T1728——1979(1989);(1)表面太阳反射比测试,依据JG/T235-2008《建筑反射隔热涂料》检测;(3)导热率:使用导热系数测试仪,按照GB/T10294-2008《绝热材料稳态热阻及有关特性的测定防护热板法》;(4)、附着力检测:检验依据GB/T5210-2006进行;(5)反射率测试:依据JG/T235-2008《建筑反射隔热涂料》检测;
表1
从表1可以看出,实施例1-4的反射率均优于对比例,表明添加的红外反射颜料可以减少材料表面的得热,从而达到隔热目的;
从实施例1-4可以看出在添加的二氧化硅气凝胶为4%时涂料的附着力较好,且导热率均优于对比例。
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 (9)
1.一种水性纳米耐高温保温隔热材料,其特征在于:由下述组分按质量百分比制成:水性树脂16-22%、红外反射颜料3-10%、二氧化硅气凝胶3-26%、空心微珠19-26%、水18-38%、乳液6-10%、助剂2-5%;
其中:所述水性树脂包括:水溶性酚醛改性醇酸树脂、水性聚氨酯树脂,所述红外反射颜料为远红外陶瓷粉与尖晶石粉的烧结物,所述空心微珠为镀钛纳米陶瓷空心微珠,所述镀钛纳米陶瓷空心微珠的制备方法为:将纳米陶瓷空心微珠混于装有去离子水的反应釜中,调整体系pH值和温度,控制pH值在2.4-2.7之间,控制温度为:80-90℃,缓慢滴加钛盐溶液,同时使用NaOH始终维持体系的pH值在2.4-2.7之间,滴加结束后,提高体系温度至90-98℃,继续反应1-2h后进行过滤,洗涤滤饼,滤饼在干燥箱中以110-130℃干燥2-4h后在马沸炉中煅烧2-3h,得到镀钛纳米陶瓷空心微珠。
2.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述红外反射颜料的制备方法为:通过电熔法或烧结法制备尖晶石备用,将20-31%尖晶石、16-20%石英、11-19%硼砂、23-31滑石粉、2-4%聚丙烯酰胺、余量为水,将尖晶石、石英、硼砂、滑石粉、滑石粉作为原料混合均匀,经湿法球磨14-28小时得到浆液,将浆液过100-180目筛后加入絮凝剂进行选择性絮凝,除掉絮凝物,干燥后在氧化性气氛下进行烧制,烧制阶段为:第一阶段:320~580℃下烧制20-40min,第二阶段:600~720℃下烧制30-42min,第三阶段:750~900℃下烧制50-60min,第四阶段:920~1100℃下烧制50-62min,第五阶段:1100~1250℃下烧制20-30min,然后随炉冷却至室温,将烧结后的混合料经干法球磨20-30小时,最后过200-320目筛得到红外反射颜料。
3.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述尖晶石包括:镁尖晶石、铁尖晶石、锌尖晶石、锰尖晶石。
4.根据权利要求2所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述絮凝剂为聚丙烯酰胺。
5.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述助剂包括乳化剂0.6-1.1%、增稠剂0.5-0.9%、颜料分散剂0.7-1.5%、消泡剂0.5-0.1.1%、流平剂0.2-0.5%,所述颜料分散剂选自日本诺普科助剂有限公司,所述增稠剂选自广州市沛凌贸易有限公司,规格为RM-2020,所述消泡剂选自广州市淬凌贸易有限公司,规格为:NXZ。
6.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述镀钛纳米陶瓷空心微珠制备过程中钛盐溶液滴加时间为3-5h,所述反应釜的搅拌速度为50-60r/min。
7.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述乳液为苯乙烯和丙烯酸酯的共聚乳液。
8.根据权利要求1所述的一种水性纳米耐高温保温隔热材料,其特征在于:所述二氧化硅气凝胶为4%。
9.一种如权利要求1-8任一项所述的一种水性纳米耐高温保温隔热材料的制备方法,其特征在于:具体包括以下步骤:
(1)、将水、红外反射颜料、颜料分散剂加入分散缸中搅拌均匀,搅拌速度为120-160r/min,搅拌时间为5-10min,得到混合物A;
(2)、将镀钛纳米陶瓷空心微珠、乳化剂、增稠剂、消泡剂、流平剂、乳液缓慢加入步骤1的混合物A中低速搅拌均匀,搅拌速度为40-50r/min,搅拌时间为40-60min,得到混合物B;
(3)、将二氧化硅气凝胶、水性树脂加入步骤2得到的混合物B中继续以40-50r/min的转速搅拌20-30min得到所述的水性纳米耐高温保温隔热材料。
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