CN116285479B - 力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法 - Google Patents
力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法 Download PDFInfo
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Abstract
本发明属于高分子化学技术领域,具体涉及一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法。本发明自修复微胶囊的制备方法,包括制备TFXPUA大单体;以TFXPUA、1,6‑己二醇二丙烯酸酯(HDDA)、2‑羟基‑2‑甲基‑1‑苯基‑1‑丙酮(HMPP)为芯材,聚氨酯为壁材制备MTFXPUA。涂层的制备方法包括制备WPU;将制备的水性聚氨酯乳液与微胶囊混合均匀,制得MTFXPUA/WPU。本发明的优点是:制备方法简单,产物性能优异;具有优异的自修复性能,同时复合涂层的接触角可达101.50°、电化学低频阻抗值可达1.04×106;制得的MTFXPUA,外观呈球形,表面平整光滑,粒径为5‑60um;得到的MTFXPUA/WPU复合涂膜自修复效率高,具有良好的自修复性能,可实现对修复后材料的二次保护,涂层修复后力学性能和耐腐蚀性能优异。
Description
技术领域
本发明属于高分子化学技术领域,具体涉及一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法。
背景技术
水性聚氨酯涂料因绿色环保等优点被广泛应用在冶金、船舶、公路桥梁等领域。其不仅能够装饰物品,还能够赋予物品表面如绝缘、绝热、防腐、防霉、防锈等诸多优良性能。但是,由于老化、外界应力、外部环境腐蚀、紫外光长时间照射等原因,涂层在使用过程中会出现不同程度的微裂纹或其他类型的缺陷,这些缺陷会破坏涂层的外观、降低涂层的性能、缩短涂层的使用寿命。如果不及时修复涂层的微裂纹,就会导致涂层本身的加速损坏,降低涂层的各种优良性能,最终导致涂层的龟裂和剥落。因此,受仿生学的影响,有人提出了微胶囊技术可以对涂层微裂纹进行有效修复,可减缓对资源的消耗,从而起到节约资源的作用。
光引发型微胶囊因其在实现自主修复的基础上兼顾远程、高效和环保的优点,成为了研究微胶囊自修复体系中关注的热点。光引发自修复微胶囊是将光固化树脂、活性稀释剂、光引发剂等作为芯材包覆在微胶囊中,当将其与芯材修复液混合后,微胶囊破裂后,流出的芯材修复液经紫外光照射后在光引发剂的作用下固化,实现对材料的修复。
现有公知技术中所给出的光引发自修复微胶囊,普遍存在的技术问题是:1、因芯材原料单一,所以存在涂层修复后力学性能和耐腐蚀性能均下降的问题。2、制备方法采用原位聚合法,所以存在着微胶囊粒径较大的问题。
发明内容
为了解决上述现有技术中存在的涂层修复后力学性能和耐腐蚀性能均下降和微胶囊粒径较大的问题,本发明公开了一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法。
本发明是通过以下技术方案来实现:一种力学和耐腐蚀性能优异的自修复微胶囊的制备方法,包括以下步骤:
S1:制备含氟聚氨酯二甲基丙烯酸酯(TFXPUA)大单体;
S2:以TFXPUA、1,6-己二醇二丙烯酸酯(HDDA)、2-羟基-2-甲基-1-苯基-1-丙酮(HMPP)为芯材,聚氨酯为壁材制备含氟聚氨酯微胶囊(MTFXPUA)。
优选地,S1具体为:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、0-1.41份TFB、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后降温至室温后装瓶,避光保存得TFXPUA。
优选地,S2具体为:首先将0.75-3.75份PEG1000溶于150mlPVA溶液中,获得水相;然后再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相;最后将油相加入水相中在6000-10000rpm下分散5-25min,将乳液转移至三口烧瓶中,加入3份BDO反应2-6h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
进一步优选地,体系加入BDO后,反应搅拌速率为500rpm。
一种上述制备方法制得的一种力学和耐腐蚀性能优异的自修复微胶囊。
进一步的,涂层的制备方法包括以下步骤:
S1:制备水性聚氨酯乳液(WPU);
S2:将制备的水性聚氨酯乳液与质量分数为4%的微胶囊混合均匀,制得复合涂膜(MTFXPUA/WPU)。
优选地,S1具体为:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
进一步优选地,冰水乳化的速度为2000rpm。
优选地,S2具体为:将制备的30份水性聚氨酯乳液与2份微胶囊混合均匀,制得复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
与现有技术相比,本发明具有以下有益的技术效果:
1、本发明制备方法简单,产物性能优异:本发明公开的含氟聚氨酯微胶囊(MTFXPUA)的制备方法,采用缩聚法制得含氟聚氨酯丙烯酸酯芯材(TFXPUA),以TFXPUA、1,6-己二醇二丙烯酸酯(HDDA)、2-羟基-2-甲基-1-苯基-1-丙酮(HMPP)为芯材的含氟聚氨酯微胶囊。自制的TFXPUA引入到微胶囊中,当涂层因外力作用出现微裂纹时,随微胶囊破裂而流出的含有TFXPUA的芯材在紫外灯照射下经2-羟基-2-甲基-1-苯基-1-丙酮(HMPP)引发聚合,通过TFXPUA的交联作用以及F原子对C-C主链很强的屏蔽作用实现对修复后材料的二次保护,可使材料的损伤区域在修复后不易受环境影响而再次破坏,从而显著提高涂层的自修复性能,延长涂层的使用寿命。
2、本发明的产物成功应用到水性聚氨酯涂层(WPU)中,使环保型水性聚氨酯涂层具有优异的自修复性能,同时复合涂层的接触角可达101.50°、电化学低频阻抗值可达1.04×106。
3、本发明制备过程中温度高达85℃,其目的是为了使IPDI和PTMG1000聚合反应充分进行;高速搅拌并保持15min是为了使油水相充分混合,形成大小均一且较小的小油滴;同时在制备过程有目的地加入TMP,来增强聚氨酯涂膜的力学性能。这些特定细节的选择,首先成功制备杂质较少的TFXPUA大单体,其次制备粒径较小且大小均一的微胶囊,最终制备力学性能优异的聚氨酯涂层。本发明制备方法制得的含氟聚氨酯微胶囊(MTFXPUA),外观呈球形,表面平整光滑,粒径为5-60um。
4、制备的微胶囊通过与适量的水性聚氨酯混合,再在聚四氟乙烯板上流延成膜,50℃下放置72h,得到的MTFXPUA/WPU复合涂膜自修复效率高,具有良好的自修复性能,可实现对修复后材料的二次保护,涂层修复后力学性能和耐腐蚀性能优异。
附图说明
图1为本发明制得的MTFXPUA微胶囊的红外谱图;
图2为本发明制得的MTFXPUA微胶囊的扫描、粒径图;
图3为本发明制得的MTFXPUA/WPU复合涂膜的扫描图;
图4为本发明制得的MTFXPUA/WPU复合涂膜的接触角;
图5为本发明制得的MTFXPUA/WPU复合涂膜的电化学测试。
具体实施方式
下面结合具体的实施例对本发明做进一步的详细说明,所述是对本发明的解释而不是限定。
本发明中的IPDI为异佛尔酮二异氰酸酯,DBTDL为二月桂酸二正丁基锡,HDI为六亚甲基二异氰酸酯,BDO为1,4-丁二醇,TFB为四氟对苯二甲醇,PTMG1000为聚四氢呋喃醚二醇,HEMA为甲基丙烯酸羟乙酯,HDDA为1,6-己二醇二丙烯酸酯,HMPP为2-羟基-2-甲基-1-苯基-1-丙酮。
实施例1
一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法,包括以下步骤:
步骤一:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后装瓶,避光保存得TFXPUA。
步骤二:将0.75份PEG1000溶于150ml PVA溶液中,获得水相。再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相。将油相加入水相中在6000rpm下分散5min,将乳液转移至三口烧瓶中,加入3份BDO反应2h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
步骤三:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
步骤四:将制备的30份WPU与2份MTFXPUA混合均匀,制得复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
实施例2
一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法,包括以下步骤:
步骤一:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、0.26份TFB、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后装瓶,避光保存得TFXPUA。
步骤二:将1.50份PEG1000溶于150ml PVA溶液中,获得水相。再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相。将油相加入水相中在7000rpm下分散10min,将乳液转移至三口烧瓶中,加入3份BDO反应3h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
步骤三:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
步骤四:将制备的30份WPU与2份MTFXPUA混合均匀,制得MTFXPUA/WPU复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
实施例3
一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法,包括以下步骤:
步骤一:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、0.53份TFB、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后装瓶,避光保存得TFXPUA。
步骤二:将2.25份PEG1000溶于150ml PVA溶液中,获得水相。再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相。将油相加入水相中在8000rpm下分散15min,将乳液转移至三口烧瓶中,加入3份BDO反应4h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
步骤三:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
步骤四:将制备的30份WPU与2份MTFXPUA混合均匀,制得MTFXPUA/WPU复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
实施例4
一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法,包括以下步骤:
步骤一:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、0.81份TFB、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后装瓶,避光保存得TFXPUA。
步骤二:将3份PEG1000溶于150ml PVA溶液中,获得水相。再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相。将油相加入水相中在9000rpm下分散20min,将乳液转移至三口烧瓶中,加入3份BDO反应4h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
步骤三:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
步骤四:将制备的30份WPU与2份MTFXPUA混合均匀,制得MTFXPUA/WPU复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
实施例5
一种力学和耐腐蚀性能优异的自修复微胶囊及涂层的制备方法,包括以下步骤:
步骤一:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份IPDI、5.66份PTMG1000、1.41份TFB、0.02份DBTDL,于85℃反应3h。80℃加入0.98份HEMA反应3h,反应结束后装瓶,避光保存得TFXPUA。
步骤二:将3.75份PEG1000溶于150ml PVA溶液中,获得水相。再将2份TFXPUA、0.20份HDDA、1份HMPP加入到烧杯中搅拌均匀,获得油相。将油相加入水相中在10000rpm下分散25min,将乳液转移至三口烧瓶中,加入3份BDO反应6h,反应结束后取出冷却、离心、干燥,获得含氟聚氨酯微胶囊(MTFXPUA)。
步骤三:将10份PTMG1000、7份IPDI、1.08份DMPA加入到装有搅拌器的250mL三口烧瓶中,以5份NMP为溶剂、0.04份DBTDL为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3h,降至60℃以下,再加入0.20份TMP,于80℃下恒温反应4h,冷却至40℃以下,加入1.20份TEA中和0.5h,43.28份冰水高速乳化15min,即制得水性聚氨酯乳液(WPU)。
步骤四:将制备的30份WPU与2份MTFXPUA混合均匀,制得MTFXPUA/WPU复合乳液。将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72h,即可而获得MTFXPUA/WPU复合涂膜。
实施例3为最佳实施例。
图1为以TFXPUA、HDDA、HMPP为芯材,聚氨酯为壁材的MTFXPUA的红外谱图。由图可知,3591cm-1为HMPP中羟基的伸缩振动峰,3376cm-1为氨基甲酸酯基的伸缩振动峰,2932cm-1、2852cm-1为-CH3、-CH2的伸缩振动峰,1745cm-1为C=O的伸缩振动峰,1689cm-1为芯材中含氟聚氨酯丙烯酸酯中的C=C的伸缩振动峰,1463cm-1、761cm-1为光引发剂中苯环的伸缩振动峰,1236cm-1、1091cm-1为-CF的伸缩振动峰,综上表明成功制得MTFXPUA。
图2为制备的MTFXPUA的SEM形貌图和粒径分布图。由图2a可知,所得微胶囊MTFXPUA表面光滑,形貌规整,大小较为均一,且具有较好的分散性。由图2b可知,制得的MTFXPUA其平均粒度为24.05μm,其粒径大小与图2a相符。
图3为MTFXPUA/WPU复合涂膜修复前后的SEM谱图。图3a为MTFXPUA/WPU复合涂膜被刀片划刻之后的SEM图。由图3b可知,涂层受损部位已被聚合物修复。
图4为芯材TFXPUA中TFB用量为6%,MTF6PUA修复处的接触角达到96.80°,具有疏水性。当TFB用量大于6%时,接触角增加趋势变缓。
图5为引入6%的TFB时,MTF6PUA/WPU低频阻抗值由2.67×105Ω·cm2增加到8.97×105,Nyquist曲线半径增长幅度较大,继续增加TFB用量,半径变化不明显。因此,当TFB添加量为6%时,涂层的自修复性能最优,使用寿命最长久。
以上对本发明的具体实施例进行了详细的说明描述,且对不同的实施例的产物现象进行了描述,但其只是作为范例,本发明并不限制于以上描述的具体实施例。对于本领域技术人员而言,任何对本发明进行的等同修改和替代也都在本发明的范畴之中。因此,在不脱离本发明的精神和范围下所作的均等变换和修改,都应涵盖在本发明的范围内。
Claims (3)
1.一种力学和耐腐蚀性能优异的自修复微胶囊的制备方法,其特征在于,包括以下步骤:
S1:制备含氟聚氨酯二甲基丙烯酸酯大单体;
S2:以含氟聚氨酯二甲基丙烯酸酯、1,6-己二醇二丙烯酸酯、2-羟基-2-甲基-1-苯基-1-丙酮为芯材,聚氨酯为壁材制备含氟聚氨酯微胶囊;
S1具体为:向带有搅拌器、冷凝管和滴液漏斗的三口烧瓶中加入6份异佛尔酮二异氰酸酯、5.66份聚四氢呋喃醚二醇、0-1.41份四氟对苯二甲醇、0.02份二月桂酸二正丁基锡,于85℃反应3 h,80℃加入0.98份甲基丙烯酸羟乙酯反应3h,反应结束后降温至室温后装瓶,避光保存得含氟聚氨酯二甲基丙烯酸酯;
S2具体为:首先将0.75-3.75份聚乙二醇溶于150 ml聚乙烯醇溶液中,获得水相;然后再将2份含氟聚氨酯二甲基丙烯酸酯、0.20份1,6-己二醇二丙烯酸酯、1份2-羟基-2-甲基-1-苯基-1-丙酮加入到烧杯中搅拌均匀,获得油相;最后将油相加入水相中在6000-10000rpm下分散5-25min,将乳液转移至三口烧瓶中,加入3份1,4-丁二醇反应2-6h,反应结束后取出冷却、离心、干燥,获得微胶囊;
体系加入1,4-丁二醇后,反应搅拌速率为500rpm。
2.根据权利要求1所述的一种上述制备方法制得的力学和耐腐蚀性能优异的自修复微胶囊。
3.根据权利要求1所述的力学和耐腐蚀性能优异的自修复微胶囊涂层的制备方法,其特征在于,包括以下步骤:
S1:制备水性聚氨酯;
S2:将制备的水性聚氨酯乳液与质量分数为4 %的微胶囊混合均匀,制得复合涂膜;
S1具体为:将10份聚四氢呋喃醚二醇、7份异佛尔酮二异氰酸酯、1.08份二羟甲基丙酸加入到装有搅拌器的250mL三口烧瓶中,以5份N-甲基-2-吡咯烷酮为溶剂、0.04份二月桂酸二丁基锡为催化剂,将三口烧瓶置于85℃水浴锅中,恒温反应3 h,降至60℃以下,再加入0.20份三羟甲基丙烷,于80 ℃下恒温反应4h,冷却至40℃以下,加入1.20份三乙胺中和0.5h,43.28份冰水高速乳化15 min,即制得水性聚氨酯乳液;
冰水乳化的速度为2000rpm;
S2具体为:将制备的30份水性聚氨酯乳液与2份微胶囊混合均匀,制得复合乳液,将静置后的复合乳液在聚四氟乙烯板上流延成膜,50℃下放置72 h,即可而获得复合涂膜。
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CN108912870A (zh) * | 2018-07-26 | 2018-11-30 | 成都新柯力化工科技有限公司 | 一种自修复防腐户外建筑石墨烯涂料及制备方法 |
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KR101168038B1 (ko) * | 2011-12-15 | 2012-07-27 | 한국건설생활환경시험연구원 | 마이크로캡슐, 자기치유 코팅재 형성용 조성물, 및 캡슐 분산형 자기치유 코팅재와 그의 제조방법 |
CN102702838A (zh) * | 2012-06-28 | 2012-10-03 | 中国船舶重工集团公司第七二五研究所 | 微裂纹自修复微胶囊及其制备方法 |
CN107312435A (zh) * | 2017-07-13 | 2017-11-03 | 洛阳双瑞防腐工程技术有限公司 | 一种超耐水自修复型水性丙烯酸聚氨酯涂料及其制备方法 |
CN108912870A (zh) * | 2018-07-26 | 2018-11-30 | 成都新柯力化工科技有限公司 | 一种自修复防腐户外建筑石墨烯涂料及制备方法 |
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