CN113510978B - 一种气凝胶防腐隔热柔性板及其制作方法 - Google Patents
一种气凝胶防腐隔热柔性板及其制作方法 Download PDFInfo
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Abstract
本发明涉及防腐绝热板制造领域,提供了一种气凝胶防腐隔热柔性板及其制作方法。该气凝胶防腐隔热柔性板包括芯层及设于芯层两侧的复合层,复合层包括导热层和气凝胶毡层,导热层和气凝胶毡层依次沿着远离芯层的方向设置;气凝胶毡层通过如下方法制得:将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;将硅酸铝陶瓷纤维毡浸入该浸泡液中以使纳米二氧化硅气凝胶粉末颗粒和聚氨酯粉末颗粒浸入该硅酸铝陶瓷纤维毡中,然后取出硅酸铝陶瓷纤维毡,于50~80℃下干燥20~60min;在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型。本发明提供的气凝胶防腐隔热柔性板能够适用于各种应用场景,防腐隔热效率高、实用性强。
Description
技术领域
本发明涉及防腐绝热板制造领域,更具体而言,涉及一种气凝胶防腐隔热柔性板及其制作方法。
背景技术
防腐绝热板是隔热保温材料中的一种,是由填充芯材与绝热耐热保护表层复合而成,它有效地减少了热量传导,因此导热系数可大幅度降低,具有环保和高效节能的特性,气凝胶保温隔热板是目前世界上最先进的高效保温耐温材料,其以极低的导热系数,在保温技术要求相同时有保温层厚度薄、体积小、重量轻的优点,适用于耐高温和对防腐要求较高的领域,具有较大的经济意义。
二十一世纪以来,随着经济的飞速发展,全世界的房屋桥梁建设成绩也有了很大飞跃。近一个世纪以来,桥梁、建筑火灾事故时常发生,造成建筑火灾的危害程度和范围都比较大,给政府和人民带来了巨大的经济和生命损失。同时每年暴露在外部环境的钢铁,建筑等也不断遭受侵蚀,以上领域均需要良好的保护措施,喷涂涂料和外加保护板是有效且常见的保护方式。
目前,市场上传统的气凝胶绝热板使用过程中均面临抵抗机械损伤性能差且高低温下隔热时抗畸变弱,吸声性能容易伴随板材机械结构损耗而失效等问题。同时,传统的隔热气凝胶板材表面容易掉粉,且表面疏散,防腐性能较弱,易受虫害和较快的老化,而且适用场景有限,应用单一。
发明内容
本发明提供一种气凝胶防腐隔热柔性板及其制作方法,以解决市场上传统的气凝胶防腐绝热板抵抗机械损伤性能差、高低温下隔热时抗畸变弱、防腐性能较弱、适用场景有限等问题。
为解决上述技术问题,本发明提供了以下技术方案:
本发明一方面提供了一种气凝胶防腐隔热柔性板,所述气凝胶防腐隔热柔性板包括芯层及设于所述芯层两侧的复合层,所述复合层包括导热层和气凝胶毡层,所述导热层和所述气凝胶毡层依次沿着远离所述芯层的方向设置;所述气凝胶毡层通过如下方法制得:
将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;
将硅酸铝陶瓷纤维毡浸入所述浸泡液中以使所述纳米二氧化硅气凝胶粉末颗粒和所述聚氨酯粉末颗粒浸入所述硅酸铝陶瓷纤维毡中,然后取出所述硅酸铝陶瓷纤维毡,于50~80℃下干燥20~60min;
在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型。
优选的,所述气凝胶毡层的厚度为0.5~20mm。
优选的,所述芯层的材料为化学交联聚乙烯发泡棉,所述芯层的厚度为0.5~10mm。
优选的,所述导热层为导热硅胶片,所述导热硅胶片的一面为磨砂面,所述磨砂面与所述气凝胶毡层连接,所述导热层的厚度为0.1~5mm。
优选的,所述纳米二氧化硅气凝胶粉末的平均粒径为15~100nm;和/或
所述聚氨酯粉末的颗粒粒径为10~100nm。
优选的,所述硅酸铝陶瓷纤维毡的孔隙率为85%~90%,所述硅酸铝陶瓷纤维毡的平均纤维直径为2.20~2.85 um,所述硅酸铝陶瓷纤维毡的纤维长度为50~250mm。
本发明另一方面提供了一种气凝胶防腐隔热柔性板制作方法,所述方法包括:
提供气凝胶毡和导热片,所述导热片的一面为磨砂面;将所述气凝胶毡粘合在所述导热片的磨砂面,然后在180~200℃、1~5Mpa条件下热压1~5min得到复合层;
提供芯层,在所述芯层的两侧分别粘合所述复合层,其中,将所述芯层与所述复合层的导热片侧进行粘合;然后在130~180℃,1~3Mpa条件下热压5~15min;其中,
所述气凝胶毡通过如下方法制得:
将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;
将硅酸铝陶瓷纤维毡浸入所述浸泡液中以使所述纳米二氧化硅气凝胶粉末颗粒和所述聚氨酯粉末颗粒浸入所述硅酸铝陶瓷纤维毡中,然后取出所述硅酸铝陶瓷纤维毡,于50~80℃下干燥20~60min;
在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型。
优选的,所述提供气凝胶毡步骤中,控制所述气凝胶毡的湿度不超过5%。
优选的,所述将所述气凝胶毡粘合在所述导热片的磨砂面步骤中,使用硅酮密封胶在常温下将所述气凝胶毡粘合在所述导热片的磨砂面;和/或
所述在所述芯层的两侧分别粘合所述复合层步骤中,使用环氧树脂胶黏剂将所述芯层与所述复合层的导热片侧进行粘合。
优选的,所述制作方法还包括:
在130~180℃,1~3Mpa条件下热压5~15min后,在所述复合层的表面喷涂厚度为100~500μm的防腐层。
与现有技术相比,本发明提供的气凝胶防腐隔热柔性板,通过在芯层两侧复合一层导热层,可以防止局部过热对芯层板材造成损害;然后在导热层外继续复合一层气凝胶毡层,气凝胶毡层可以有效防止截止外界机械损伤,同时具有优异的耐高温、防火、防腐性能,这些功能可以延长整个柔性板在低环温或高环温中的使用寿命,可以提升其抵抗外界温度变化的性能。此外,隔热板具有较优异的柔性,因此适用于各种应用场景,如室内外隔热、桥梁保护、机械应用等领域。防护效率高,实用性强。
附图说明
图1是本发明实施例气凝胶防腐隔热柔性板的一种结构示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,下面结合附图和具体实施例对本发明作进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
请参阅图1所示,本发明一实施例提供了一种呈夹心结构的气凝胶防腐隔热柔性板100,包括芯层10及设于该芯层10两侧的复合层,该复合层包括导热层20和气凝胶毡层30,导热层20和气凝胶毡层30依次沿着远离该芯层10的方向设置。
在一些实施例中,气凝胶毡层30通过如下方法制得:先将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;然后将硅酸铝陶瓷纤维毡浸入该浸泡液中以使纳米二氧化硅气凝胶粉末颗粒和聚氨酯粉末颗粒浸入该硅酸铝陶瓷纤维毡中,再然后取出所述硅酸铝陶瓷纤维毡并于50~80℃下干燥20~60min;最后在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型。
在一些实施例中,采用超声工艺使纳米二氧化硅气凝胶粉末与聚氨酯粉末充分分散于溶剂中,比如超声15分钟,从而有利于后期这些颗粒均匀浸入到硅酸铝陶瓷纤维毡中。
在一些实施例中,溶剂可以选自石油醚、环己烷、己烷、戊烷等混合烃类溶剂中的任意一种或几种的组合。
在一些实施例中,将硅酸铝陶瓷纤维毡浸入浸泡液后,继续采用超声分散技术以使纳米二氧化硅气凝胶粉末颗粒和聚氨酯粉末颗粒浸入该硅酸铝陶瓷纤维毡中。
优选的,将硅酸铝陶瓷纤维毡从浸泡液中取出后于60~70℃下干燥25~40min。更优选的,于65℃下干燥30min。
在一些实施例中,纳米二氧化硅气凝胶粉末的平均粒径为15~100nm,溶解性好,易加工。
在一些实施例中,聚氨酯粉末的颗粒粒径为10~100目,溶解性好,易加工。
在一些实施例中,硅酸铝陶瓷纤维毡为双面针刺工艺成型的,厚度在10mm~50mm之间,长度和宽度可以自由剪裁,孔隙率在85%~90%之间,平均纤维直径2.20~2.85 (um),纤维长度 50~250(mm)。便于填充填料如纳米二氧化硅气凝胶粉末,易操作,抗撕裂,具有良好的综合性能。
在一些实施例中,气凝胶毡层30的厚度为0.5~20mm。
在一些实施例中,芯层10的材料为化学交联聚乙烯发泡棉,化学交联聚乙烯发泡棉具有优异的减震、抗击、耐热性能,可以进一步提升气凝胶防腐隔热柔性板的整体性能。进一步的,芯层10的厚度为0.5~10mm。
在一些实施例中,导热层20为导热硅胶片,该导热硅胶片的一面为磨砂面,用于与气凝胶毡层30连接。进一步的,导热层20的厚度为0.1~5mm。
在一些实施例中,气凝胶防腐隔热柔性板100的厚度为8~200mm。
本实施例提供的气凝胶防腐隔热柔性板100,通过在芯层10两侧复合一层导热层20,可以防止局部过热对芯层10板材造成损害;然后在导热层20外继续复合一层气凝胶毡层30,气凝胶毡层30可以有效防止截止外界机械损伤,同时具有优异的耐高温、防火、防腐性能,这些功能可以延长整个柔性板在低环温或高环温中的使用寿命,可以提升其抵抗外界温度变化的性能。此外,隔热板具有较优异的柔性,因此适用于各种应用场景,如室内外隔热、桥梁保护、机械应用等领域。防护效率高,实用性强。
本发明另一实施例还提供上述气凝胶防腐隔热柔性板制作方法,该方法包括:先制作气凝胶毡,具体的制作方法同前述,为简约起见,在此不再赘述。然后将气凝胶毡粘合在导热硅胶片的磨砂面,具体可以使用硅酮密封胶在常温下两者进行粘合。粘合后在180~200℃、1~5Mpa条件下热压1~5min得到复合层,然后在芯层的两侧均粘合该复合层,具体可以使用环氧树脂胶黏剂将芯层与复合层的导热硅胶片侧进行粘合。最后在130~180℃,1~3Mpa条件下热压5~15min即可完成制作。
在一些实施例中,将气凝胶毡与导热片粘合前,可以先对气凝胶毡进行自然干燥,干燥后的湿度控制在5%以内。进一步的,将气凝胶毡与导热硅胶片粘合时,将粘合剂施加到气凝胶毡表面,然后将气凝胶毡和导热硅胶片接触,在常温下进行15分钟左右的粘合。
在一些实施例中,在完成上述制作过程后,继续在复合层的表面喷涂厚度为100~500μm的防腐层,比如氟碳面漆,以提升材料的防腐性能。
本实施例提供的制作方法简单易实现,制得的气凝胶防腐隔热柔性板能够适用于各种应用场景,防腐隔热效率高、实用性强。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种气凝胶防腐隔热柔性板,其特征在于,所述气凝胶防腐隔热柔性板包括芯层及设于所述芯层两侧的复合层,所述复合层包括导热层和气凝胶毡层,所述导热层和所述气凝胶毡层依次沿着远离所述芯层的方向设置;所述气凝胶毡层通过如下方法制得:
将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;
将硅酸铝陶瓷纤维毡浸入所述浸泡液中以使所述纳米二氧化硅气凝胶粉末颗粒和所述聚氨酯粉末颗粒浸入所述硅酸铝陶瓷纤维毡中,然后取出所述硅酸铝陶瓷纤维毡,于50~80℃下干燥20~60min;
在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型;
所述芯层的材料为化学交联聚乙烯发泡棉;
所述导热层为导热硅胶片,所述导热硅胶片的一面为磨砂面,所述磨砂面与所述气凝胶毡层连接。
2.如权利要求1所述的气凝胶防腐隔热柔性板,其特征在于,所述气凝胶毡层的厚度为0.5~20mm。
3.如权利要求1所述的气凝胶防腐隔热柔性板,其特征在于,所述芯层的厚度为0.5~10mm。
4.如权利要求1所述的气凝胶防腐隔热柔性板,其特征在于,所述导热层的厚度为0.1~5mm。
5.如权利要求1所述的气凝胶防腐隔热柔性板,其特征在于,所述纳米二氧化硅气凝胶粉末的平均粒径为15~100nm;和/或
所述聚氨酯粉末的颗粒粒径为10~100目。
6.如权利要求5所述的气凝胶防腐隔热柔性板,其特征在于,所述硅酸铝陶瓷纤维毡的孔隙率为85%~90%,平均纤维直径为2.20~2.85um,纤维长度为50~250mm。
7.一种如权利要求1所述的气凝胶防腐隔热柔性板制作方法,其特征在于,所述方法包括:
提供气凝胶毡层和导热硅胶片,所述导热硅胶片的一面为磨砂面;将所述气凝胶毡层粘合在所述导热硅胶片的磨砂面,然后在180~200℃、1~5Mpa条件下热压1~5min得到复合层;
提供芯层,在所述芯层的两侧分别粘合所述复合层,其中,将所述芯层与所述复合层的导热硅胶片侧进行粘合;然后在130~180℃,1~3Mpa条件下热压5~15min;其中,
所述气凝胶毡层通过如下方法制得:
将纳米二氧化硅气凝胶粉末与聚氨酯粉末混溶于溶剂中,搅拌后得到浸泡液;
将硅酸铝陶瓷纤维毡浸入所述浸泡液中以使所述纳米二氧化硅气凝胶粉末颗粒和所述聚氨酯粉末颗粒浸入所述硅酸铝陶瓷纤维毡中,然后取出所述硅酸铝陶瓷纤维毡,于50~80℃下干燥20~60min;
在80~120℃、3~10MP条件下热压15~50min后,冷却至常温并保持压力持续压制8~24h成型。
8.如权利要求7所述的气凝胶防腐隔热柔性板制作方法,其特征在于,所述提供气凝胶毡层步骤中,控制所述气凝胶毡层的湿度不超过5%。
9.如权利要求7所述的气凝胶防腐隔热柔性板制作方法,其特征在于,所述将所述气凝胶毡层粘合在所述导热硅胶片的磨砂面步骤中,使用硅酮密封胶在常温下将所述气凝胶毡层粘合在所述导热硅胶片的磨砂面;和/或
所述在所述芯层的两侧分别粘合所述复合层步骤中,使用环氧树脂胶黏剂将所述芯层与所述复合层的导热硅胶片侧进行粘合。
10.如权利要求7所述的气凝胶防腐隔热柔性板制作方法,其特征在于,所述制作方法还包括:
在130~180℃,1~3Mpa条件下热压5~15min后,在所述复合层的表面喷涂厚度为100~500μm的防腐层。
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