CN108102538A - 一种疏水涂层的制备方法及其在斜拉桥金属构件的应用 - Google Patents

一种疏水涂层的制备方法及其在斜拉桥金属构件的应用 Download PDF

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CN108102538A
CN108102538A CN201711402501.2A CN201711402501A CN108102538A CN 108102538 A CN108102538 A CN 108102538A CN 201711402501 A CN201711402501 A CN 201711402501A CN 108102538 A CN108102538 A CN 108102538A
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刘林华
王纯鸣
郭秀清
杨献洲
赵树昌
裴小龙
王佳财
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Abstract

本发明公开了一种疏水涂层的制备方法,其技术方案要点是包括有以下步骤:S1:先称取H2O和EtOH,混合均匀,得到溶液A;S2:加入酸性催化剂CH3COOH;S3:再将有机改性溶液逐滴加入到混合溶液中;S4:并逐滴加入到含有硅溶胶的三口烧瓶中;S5:去除未反应的有机改性溶液,并干燥;S6:基材表面处理;S7:将上述液体与硅树脂混合得到改性纳米SiO2溶液;S8:将金属构件浸入疏水涂层溶液并晾干,重复以上步骤3‑8次,达到了紧密结合基体,同时能够很好的起到对水份的隔离作用,减少基体表面出现的腐蚀情况。

Description

一种疏水涂层的制备方法及其在斜拉桥金属构件的应用
技术领域
本发明涉及金属构件技术领域,特别涉及一种疏水涂层的制备方法及其在斜拉桥金属构件的应用。
背景技术
斜拉桥又称斜拉桥,是将主梁用许多拉索直接拉在桥塔上的一种桥梁,是由承压的塔、受拉的索和承弯的梁体组合起来的一种结构体系。其可看作是拉索代替支墩的多跨弹性支承连续梁。其可使梁体内弯矩减小,降低建筑高度,减轻了结构重量,节省了材料。斜拉桥主要由索塔、主梁、斜拉索组成。
斜拉桥中大量的使用了钢结构件,对斜拉桥起到支撑、固定和连接的作用,但是钢结构的使用容易出现腐蚀现象,尤其在桥梁涉及的江、河、湖、海地区,而选用耐蚀材料,例如选用耐候钢、不锈钢,不过价格过于昂贵,因此开发用于钢结构件的表面处理技术仍然是目前桥梁结构中重要的开发方向。
发明内容
本发明的目的是提供一种疏水涂层的制备方法,起到了紧密结合基体,同时能够很好的起到对水份的隔离作用,减少基体表面出现的腐蚀情况。
本发明的上述技术目的是通过以下技术方案得以实现的:一种疏水涂层的制备方法,包括有以下步骤:
S1:先称取H2O和EtOH,将二者混合均匀,得到溶液A;
S2:在搅拌均匀后的A溶液中加入酸性催化剂CH3COOH,并用精密数显酸度计将pH值调节为2.6-3.4时截止;
S3:再将A溶液0.6倍-2倍重量的有机改性溶液逐滴加入到已调好pH的混合溶液中,使其预水解25-35min,并得到溶液B;
S4:将溶液B在25-35min内用分液漏斗逐滴加入到含有硅溶胶的三口烧瓶中,20-30℃恒温水浴反应24h后静置,得到样品C;
S5:S4中,得到的样品C首先经过离心,并再分散于去离子水中,循环三次去除未反应的有机改性溶液,冷冻干燥24h后于80-120℃真空干燥10-16h;
S6:基材表面处理选取金属板材为基材,分别先用洗涤剂洗后再用溶剂超声20-40min洗去表面的油脂杂质,然后用乙醇超声30min,最后用蒸馏水冲洗干净并于60℃下干燥1h,得到物品D;
S7:将物品D与硅树脂混合得到改性纳米SiO2溶液;
S8:将金属构件浸入改性纳米SiO2溶液中30min,室温晾干后于60℃干燥10min,重复以上步骤3-8次,待表面完全干燥后置于具有一定温度的烘箱中干燥12h。
较佳的,有机改性溶液包括有MTMS、GPTS、KH-570或者G617中的一种或几种。
较佳的,有机改性溶液包括有MTMS和G617的混合溶液。
较佳的,MTMS和G617混合的质量比为1:2。
较佳的,溶液A中以1:4的质量比对H2O和EtOH进行混合。
通过上述技术方案,对二氧化硅进行改性后制备成疏水涂层,疏水涂层与金属接触面进行紧密的结合,同时疏水的二氧化硅作为疏水因子,能够很好的起到对水份的隔离作用,减少基体表面出现的腐蚀情况。
本发明的目的二:一种如权利要求1-5任意一项所述的疏水涂层在斜拉桥金属构件的应用。
本发明的目的三:一种斜拉桥用钢结构梁,包括有如权利要求1-5任意一项所述的疏水涂层和钢结构本体,疏水涂层附着在钢结构本体表面。
较佳的,疏水涂层的厚度为0.2-0.6mm。
说明:
GPTSγ-缩水甘油醚氧丙基三甲氧基硅烷
G617全氟辛基三乙氧基硅烷
MTMS甲基三甲氧基硅烷
KH-570γ-(2,3-环氧丙氧)丙基三甲氧基硅烷。
综上所述,本发明具有以下有益效果:
1、同时改性过程中选用多种改性有机物来进行复合改性,复合改性的SiO2与有机物的相容性优于单独改性,并且具有良好的分散稳定性;
2、对于采用被发明制备的防腐蚀涂层还具有良好的自清洁性能,应用于钢结构件中能够让桥梁在服役过程中看起来更加新;
3、采用二氧化硅改性后的表面还具有减反射的功能,减少桥梁两侧金属构件在阳光直射情况下发生反射,增加行车人员自身的安全;
4、防覆冰也是防腐蚀涂层的另外一个重要效果,对于很多北方地区,减少钢结构件上的覆冰问题能够增加行人和检修人员的人身安全。
具体实施方式
以下对本发明作进一步详细说明。
实施例1、一种疏水涂层的制备方法,包括有以下步骤:
S1:先以1:4的质量比称取H2O和EtOH,将二者混合均匀,得到溶液A;
S2:在搅拌均匀后的A溶液中加入酸性催化剂CH3COOH,并用精密数显酸度计将pH值调节为3.4时截止;
S3:再将A溶液2倍重量的有机改性溶液逐滴加入到已调好pH的混合溶液中,其中有机改性溶液为MTMS和G617按照1:2的质量比进行配合,使其预水解35min,并得到溶液B;S4:将溶液B在35min内用分液漏斗逐滴加入到含有硅溶胶的三口烧瓶中,30℃恒温水浴反应24h后静置,得到样品C;
S5:S4中,得到的样品C首先经过离心,并再分散于去离子水中,循环三次去除未反应的有机改性溶液,冷冻干燥24h后于120℃真空干燥16h;
S6:基材表面处理选取金属板材为基材,分别先用洗涤剂洗后再用溶剂超声40min洗去表面的油脂杂质,然后用乙醇超声30min,最后用蒸馏水冲洗干净并于60℃下干燥1h,得到物品D;
S7:将物品D与硅树脂混合得到改性纳米SiO2溶液;
S8:将金属构件浸入改性纳米SiO2溶液中30min,室温晾干后于60℃干燥10min,重复以上步骤8次,待表面完全干燥后置于具有一定温度的烘箱中干燥12h。
实施例2、一种疏水涂层的制备方法,包括有以下步骤:
S1:先以1:4的质量比称取H2O和EtOH,将二者混合均匀,得到溶液A;
S2:在搅拌均匀后的A溶液中加入酸性催化剂CH3COOH,并用精密数显酸度计将pH值调节为2.6-3.4时截止;
S3:再将A溶液0.6倍重量的有机改性溶液逐滴加入到已调好pH的混合溶液中,其中有机改性溶液为MTMS,使其预水解25min,并得到溶液B;
S4:将溶液B在25min内用分液漏斗逐滴加入到含有硅溶胶的三口烧瓶中,20℃恒温水浴反应24h后静置,得到样品C;
S5:S4中,得到的样品C首先经过离心,并再分散于去离子水中,循环三次去除未反应的有机改性溶液,冷冻干燥24h后于80℃真空干燥10h;
S6:基材表面处理选取金属板材为基材,分别先用洗涤剂洗后再用溶剂超声20min洗去表面的油脂杂质,然后用乙醇超声30min,最后用蒸馏水冲洗干净并于60℃下干燥1h,得到物品D;
S7:将物品D与硅树脂混合得到改性纳米SiO2溶液;
S8:将金属构件浸入改性纳米SiO2溶液中30min,室温晾干后于60℃干燥10min,重复以上步骤3次,待表面完全干燥后置于具有一定温度的烘箱中干燥12h。
实施例3、一种疏水涂层的制备方法,包括有以下步骤:
S1:先以1:4的质量比称取H2O和EtOH,将二者混合均匀,得到溶液A;
S2:在搅拌均匀后的A溶液中加入酸性催化剂CH3COOH,并用精密数显酸度计将pH值调节为3时截止;
S3:再将A溶液1.3倍重量的有机改性溶液逐滴加入到已调好pH的混合溶液中,其中有机改性溶液为G617,使其预水解30min,并得到溶液B;
S4:将溶液B在30min内用分液漏斗逐滴加入到含有硅溶胶的三口烧瓶中,25℃恒温水浴反应24h后静置,得到样品C;
S5:S4中,得到的样品C首先经过离心,并再分散于去离子水中,循环三次去除未反应的有机改性溶液,冷冻干燥24h后于100℃真空干燥13h;
S6:基材表面处理选取金属板材为基材,分别先用洗涤剂洗后再用溶剂超声30min洗去表面的油脂杂质,然后用乙醇超声30min,最后用蒸馏水冲洗干净并于60℃下干燥1h,得到物品D;
S7:将物品D与硅树脂混合得到改性纳米SiO2溶液;
S8:将金属构件浸入改性纳米SiO2溶液中30min,室温晾干后于60℃干燥10min,重复以上步骤5次,待表面完全干燥后置于具有一定温度的烘箱中干燥12h。
对比试验
对比例1、采用传统钢结构件来作为斜拉桥的钢结构梁。
摩擦实验:
超疏水涂层在400#的砂纸上摩擦100m后,是否保持超疏水的特性。
粘贴实验
在使用胶带粘贴测试重复500次后,超疏水涂层的接触角和滚动角是否有发生显著变化。
表一:防腐蚀涂层检测数据表。
实施例1 实施例2 实施例3 对比例1
接触角 148.3° 147.7° 147.3° 78.98°
摩擦实验 具有 具有 具有 不具有
粘贴实验 无变化 无变化 无变化 无变化
通过上表可以发现,经过改性的疏水涂层涂覆在金属上后,接触角与普通钢铁构件有很大的变化,接触角的范围在147°-148°之间,这种角度的接触角能够让表面具有良好的疏水性能,而疏水性能应用在钢铁构件上则能够很好的起到防腐蚀的效果;同时通过摩擦实验和粘贴实验可以发现该疏水涂层具有很好的机械性能,而良好的机械性能更是该涂层应用与钢结构件上的重要因素,只有拥有良好的机械性能,才能够减少钢结构件维护疏水涂层的次数,这对体积超大的斜拉桥来说尤其重要,很多钢结构的使用位置是维修人员很难达到的,因此良好的机械性能减少了维修的可能,降低了维修成本,增加了桥梁的使用寿命。
本具体实施例仅仅是对本发明的解释,其并不是对本发明的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本发明的权利要求范围内都受到专利法的保护。

Claims (8)

1.一种疏水涂层的制备方法,其特征在于:包括有以下步骤:
S1:先称取 H2O 和EtOH,将二者混合均匀,得到溶液A;
S2:在搅拌均匀后的A溶液中加入酸性催化剂 CH3COOH,并用精密数显酸度计将pH值调节为2.6-3.4时截止;
S3:再将A溶液0.6倍-2倍重量的有机改性溶液逐滴加入到已调好pH的混合溶液中,使其预水解25-35min,并得到溶液B;
S4:将溶液B在25-35min内用分液漏斗逐滴加入到含有硅溶胶的三口烧瓶中,20-30℃恒温水浴反应24h后静置,得到样品C;
S5:S4中,得到的样品C首先经过离心,并再分散于去离子水中,循环三次去除未反应的有机改性溶液,冷冻干燥24 h后于80-120℃真空干燥10-16h;
S6:基材表面处理 选取金属板材为基材,分别先用洗涤剂洗后再用溶剂超声20-40min洗去表面的油脂杂质,然后用乙醇超声30 min,最后用蒸馏水冲洗干净并于60℃下干燥 1h ,得到物品D;
S7: 将物品D与硅树脂混合得到改性纳米 SiO2溶液;
S8:将金属构件浸入改性纳米 SiO2溶液中30 min,室温晾干后于 60℃干燥10 min,重复以上步骤3-8次,待表面完全干燥后置于具有一定温度的烘箱中干燥12 h。
2.根据权利要求1所述的一种疏水涂层的制备方法,其特征在于:有机改性溶液包括有MTMS、GPTS、KH-570或者G617中的一种或几种。
3.根据权利要求2所述的一种疏水涂层的制备方法,其特征在于:有机改性溶液包括有MTMS和G617的混合溶液。
4.根据权利要求3所述的一种疏水涂层的制备方法,其特征在于:MTMS和G617混合的质量比为1:2。
5.根据权利要求1所述的一种疏水涂层的制备方法,其特征在于:溶液A中以 1:4 的质量比对H2O 和EtOH进行混合。
6.一种如权利要求1-5任意一项所述的疏水涂层在斜拉桥金属构件的应用。
7.一种斜拉桥用钢结构梁,其特征在于:包括有如权利要求1-5任意一项所述的疏水涂层和钢结构本体,疏水涂层附着在钢结构本体表面。
8.根据权利要求7所述的一种斜拉桥用钢结构梁,其特征在于:疏水涂层的厚度为0.2-0.6mm。
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