CN110105844B - 一种环保型防核辐射涂料及其制备方法 - Google Patents
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Abstract
本发明公开了一种环保型防核辐射涂料及其制备方法。所述防核辐射涂料为双组分室温固化涂料,其中A组分包括硅烷偶联剂改性的环氧树脂、无机硅酸盐溶液、石墨烯、钛白粉及少量助剂,去离子水调节粘度;B组分为水性胺类固化剂。该涂料的基体树脂通过有机‑无机杂化共混而成,其结构中含有的苯环能对核辐射起到一定屏蔽作用,同时掺杂的石墨烯能够有效的吸收γ射线。本发明制备的环保型防核辐射涂料具有良好的耐腐蚀性能,抗核辐射性能优异。
Description
技术领域
本发明属于防辐射材料领域,具体涉及一种环保型防核辐射涂料及其制备方法。
背景技术
核辐射是原子核从一种结构或一种能量状态转变为另一种结构或另一种能量状态过程中所释放出来的微观粒子流。其释放的γ射线波长短于0.01埃,是一种高频电磁波,穿透力极强。核辐射会加快运行机械设备的老化,对维修的工作人员危害极大,因此对于核辐射污染的防护不容小觑。目前,在各种机械设备、建筑物表面涂覆抗核辐射涂料是最常用的防护措施。CN102585697B,CN102850910A均制备了一种防核辐射涂料,使用有机溶剂型基料作为成膜物质,在生产和应用过程中溶剂的挥发会对环境造成污染。CN104804640B制备了一种钢结构用防核辐射涂料,需高温烘烤固化。CN1052382040B制备了一种水性环氧树脂涂料,可常温固化,但主要的防辐射填料为钛酸钾晶须,钛酸钾对快中子的散射和减速、慢中子的吸收及二次释放的共化粒子或γ射线的屏蔽和吸收效果不佳。因此,本发明旨在开发一种环保型高效防核辐射涂料。
发明内容
本发明目的在于针对目前现有技术,制备一种对核辐射具有较好屏蔽作用的环保型防核辐射涂料。
本发明解决其技术问题所采用的技术方案是:一种环保型防核辐射涂料,主要由2~4重量份的A组分和1重量份的B两组分组成;其中A组分由下法制得:在磁力搅拌作用下将1~10重量份的硅烷偶联剂改性的环氧树脂加入到10~20重量份的硅酸盐溶液中,充分搅拌0.5~1h,然后加入1~5重量份的石墨烯,5~10重量份的钛白粉,再添加0.1~0.5重量份的助剂充分混合均匀,加入去离子水调节粘度至10-200cp,即得到A组分;B组分为胺类固化剂。
本发明还提供了上述环保型防核辐射涂料的制备方法,包括以下步骤:
1)在磁力搅拌作用下将1~10重量份的硅烷偶联剂改性的环氧树脂加入到10~20重量份的硅酸盐溶液中,充分搅拌0.5~1h,然后加入1~5重量份的石墨烯,5~10重量份的钛白粉,添加0.1~0.5重量份的助剂充分混合均匀,用适量去离子水调节粘度至10-200cp,即得到A组分;
2)B组分为胺类固化剂;
3)边搅拌一边将步骤2)中的B组分加入到步骤1)所得A组分中,A组分和B组分的重量配比为2~4:1,在200~500rpm下搅拌0.5h即制得所述环保型防核辐射涂料。
按上述方案,所述的硅烷偶联剂改性的环氧树脂为氨丙基硅氧烷改性环氧树脂、缩水甘油醚氧基硅氧烷改性环氧树脂中的任意一种或它们的组合。
按上述方案,所述的硅酸盐溶液中的硅酸盐为硅酸钾、硅酸锂中的任意一种或它们的组合(如所述的硅酸盐溶液为硅酸锂溶液或硅酸锂溶液和硅酸钾溶液的混合物)。硅酸盐溶液的模数3.7~3.9、浓度5~10wt%。
按上述方案,所述的胺类固化剂为水性的脂肪族多元胺及其改性物、水性的聚酰胺及其改性物、水性的芳香族胺、脂环胺、酚醛胺中的任意一种或它们的组合。
按上述方案,所述的助剂包括润湿分散剂、流平剂、消泡剂中的一种或它们的组合。
按上述方案,所述的石墨烯为少层石墨烯、多层石墨烯或它们的任意组合。
按上述方案,所述的钛白粉为金红石型钛白粉。
本发明采用硅烷偶联剂改性的环氧树脂与无机硅酸盐溶液进行物理混拼,然后加入石墨烯材料,钛白粉,室温条件下用胺类水性环氧树脂固化剂固化,以此制备防核辐射涂料。本发明涂料的基体树脂(硅烷偶联剂改性的环氧树脂)通过有机-无机杂化共混而成,其结构中含有的苯环能对核辐射起到一定屏蔽作用,锂离子对快中子的散射和减速、慢中子的吸收及二次释放的共化粒子或γ射线的屏蔽和吸收效果好,同时根据石墨烯具有类苯环结构能吸收γ射线的特性,更进一步的防止了核辐射。然后配合胺类固化剂使用,能在室温条件下形成具有耐高温、优异致密性的抗核辐射涂层。
具体实施方式
下面通过具体实施例对本发明的具体实施方式作进一步详细的说明。
环保型防核辐射涂料的配方见下表:
实施例1
取18g硅酸钾溶液至烧杯中,在磁力搅拌作用下缓慢加入2g氨丙基硅氧烷改性环氧树脂(市售产品),充分搅拌0.5~1h,然后边搅拌边加入1g石墨烯,5g钛白粉(金红石型),添加0.2g消泡剂(台湾德谦W0506)、0.2g流平剂(海川化工的DSX2000),去离子水适量(用于调节粘度至涂4#杯≥30s),500rpm下继续搅拌0.5h得到A组分;然后用5gB组分改性聚酰胺(TY-650)室温固化,即得所需防辐射涂料。
本发明所述缓慢加入是指控制加入速度使氨丙基硅氧烷改性环氧树脂更好地溶于硅酸钾溶液中。
实施例2
取16g硅酸钾溶液至烧杯中,在磁力搅拌作用下缓慢加入4g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入2g石墨烯,8g钛白粉,添加少量助剂(0.1g消泡剂、0.2流平剂、0.1g抗沉剂),去离子水适量(涂4#杯≥30s),500rpm下继续搅拌0.5h得到A组分;然后用5gB组分TAC-900脂环胺固化剂室温固化,即得所需防辐射涂料。
实施例3
取12g硅酸钾溶液至烧杯中,在磁力搅拌作用下缓慢加入8g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入3g石墨烯,,10g钛白粉,添加少量助剂(消泡剂、流平剂、抗沉剂0.1%-0.5%),去离子水适量(调节粘度至50cp),200rpm下继续搅拌0.5h得到A组分;然后用5gB组分TZ-50酚醛胺固化剂室温固化,即得所需防辐射涂料。
实施例4
分别取10g硅酸钾溶液(模数3.7~3.9、浓度8wt%)、8g硅酸锂溶液(模数3.7~3.9、浓度8wt%)至烧杯中,在磁力搅拌作用下缓慢加入2g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入5g石墨烯,10g钛白粉,添加0.2g消泡剂(台湾德谦W0506)、0.2g流平剂(海川化工的DSX2000),去离子水适量(调节粘度至80cp),500rpm下继续搅拌0.5h得到A组分;然后用4gB组分改性聚酰胺TY-650室温固化,即得所需防辐射涂料。
实施例5
分别取10g硅酸钾溶液、5g硅酸锂溶液至烧杯中,在磁力搅拌作用下缓慢加入5g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入5g石墨烯,10g钛白粉,添加少量助剂(0.1-0.5g),去离子水适量(涂4#杯≥30s),500rpm下继续搅拌0.5h得到A组分;然后用5gB组分改性聚酰胺TY-650室温固化,即得所需防辐射涂料。
实施例6
分别取8g硅酸钾溶液、8g硅酸锂溶液至烧杯中,在磁力搅拌作用下缓慢加入4g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入5g石墨烯,5g钛白粉添加少量助剂(消泡剂、流平剂、抗沉剂:0.1-0.5g),去离子水适量(涂4#杯≥30s),500rpm下继续搅拌0.5h得到A组分;然后用5gB组分改性聚酰胺TY-650室温固化,即得所需防辐射涂料。
实施例7
分别取5g硅酸锂溶液、5g硅酸钾溶液至烧杯中,在磁力搅拌作用下缓慢加入10g氨丙基硅氧烷改性环氧树脂,充分搅拌0.5~1h,然后边搅拌边加入5g石墨烯,5g钛白粉,添加少量助剂(0.1-0.5g),去离子水适量(涂4#杯≥30s),500rpm下继续搅拌0.5h得到A组分;然后用2gB组分改性聚酰胺TY-650室温固化,即得所需防辐射涂料。
所制备的水性有机/无机杂化防辐射涂料性能见表2
Claims (4)
1.一种环保型防核辐射涂料的制备方法,其特征在于:制备步骤如下:
1)在磁力搅拌作用下将1~10重量份的硅烷偶联剂改性的环氧树脂加入到10~20重量份的硅酸盐溶液中,充分搅拌0.5~1h,然后加入1~5重量份石墨烯,5~10重量份钛白粉,添加0.1~0.5重量份助剂充分混合均匀,加入去离子水调节粘度至10-200cP,即得到A组分;
2)B组分为胺类固化剂;
3)边搅拌边将B组分加入步骤1)所得A组分中,A组分和B组分的重量配比为2~4:1,在200~500rpm下搅拌0.5h即制得所述环保型防核辐射涂料;
所述的硅烷偶联剂改性的环氧树脂为氨丙基硅氧烷改性环氧树脂;
所述的硅酸盐溶液中的硅酸盐为硅酸锂和硅酸钾的混合物;
所述硅酸盐模数3.7-3.9;所述硅酸盐溶液的浓度为8wt%。
2.根据权利要求1所述的一种环保型防核辐射涂料的制备方法,其特征在于所述的胺类固化剂为脂肪族多元胺及其改性物、聚酰胺及其改性物、芳香族胺、脂环胺、酚醛胺中的任意一种或它们的组合。
3.根据权利要求1所述的一种环保型防核辐射涂料的制备方法,其特征在于所述的助剂包括水性润湿分散剂、水性流平剂、水性消泡剂中的一种或它们的组合。
4.根据权利要求1所述的一种环保型防核辐射涂料的制备方法,其特征在于所述的钛白粉为金红石型钛白粉。
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