CN112280551B - 基于pda和双(6-甲酰基苯氧基)-二吡啶铜的热致可逆变色复合材料的制备 - Google Patents

基于pda和双(6-甲酰基苯氧基)-二吡啶铜的热致可逆变色复合材料的制备 Download PDF

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CN112280551B
CN112280551B CN202011175583.3A CN202011175583A CN112280551B CN 112280551 B CN112280551 B CN 112280551B CN 202011175583 A CN202011175583 A CN 202011175583A CN 112280551 B CN112280551 B CN 112280551B
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常玥
田丽君
曹珊珊
唐忠家
李德丽
查飞
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Abstract

本发明提供了一种基于PDA和双(6‑甲酰基苯氧基)‑二吡啶铜的热致可逆变色复合材料的制备方法,是将二乙炔单体和双(6‑甲酰基苯氧基)‑二吡啶铜(II)溶解于二甲基亚砜‑去离子水混合溶剂中形成溶液;20~80℃下超声该混合溶液30~80 min,冷却至室温后进行低温自组装,最后置于波长254 nm的紫外光下照射聚合15~55min,得到具有热致可逆变色复合材料PDA/双(6‑甲酰基苯氧基)‑二吡啶铜。本发明复合材料在室温~80℃区间,随着温度的不断升高,材料的颜色由室温的蓝色→紫色→红色→橙黄色;停止加热冷却至室温后,复合材料颜色恢复至紫色。复合材料具有极佳的热敏性并在室温~80℃间多次热致可逆变色,可作为温度传感器在众多领域得到运用。

Description

基于PDA和双(6-甲酰基苯氧基)-二吡啶铜的热致可逆变色复 合材料的制备
技术领域
本发明涉及一种热致可逆变色材料的制备方法,尤其涉及一种基于聚二乙炔(PDA)和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,属于智能传感领域。
技术背景
热致变色材料是一种新型的智能材料,在不同的外界刺激下发生色度转变,其已被广泛用于温度传感器、激光警告、有色服装、温度敏感涂料等领域。许多研究表明,热致变色材料根据环境温度改变颜色,可用于设计低成本的温度传感器。按照元素组成分类,热致变色材料分为无机热致变色材料和有机热致变色材料,在众多有机热致变色材料中,对聚二乙炔的研究最为广泛。
聚二乙炔(PDA)是一种烯炔交联的共轭聚合物,其是由二炔单体(DA)自组装后经紫外线诱导的聚合作用形成的有序的超分子结构。PDA吸收可见光并在外部刺激下显示不可逆的蓝到红的颜色转变,这种独特的颜色转换特性可使它作为比色传感器,但由于它的色度转换不可逆,限制了它的可持续使用,所以需要对它进行改性以得到热致可逆变色的复合材料。
发明内容
本发明的目的是提供一种基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法。
一、PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备
本发明基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,是将二乙炔单体溶于二甲基亚砜-去离子水混合溶剂中;将双(6-甲酰基苯氧基)-二吡啶铜(II)溶于二甲基亚砜后加入到二乙炔单体溶液中形成混合溶液;然后将混合溶液在20~80℃下超声30~80 min,冷却至室温后进行低温自组装8~16 h,得绿色悬浮液;最后将绿色悬浮液置于波长254 nm的紫外光下照射聚合15~55min,得到均匀的蓝色热致可逆变色复合材料PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)。
所述二乙炔单体(DA)为10,12-二十五碳二炔酸(PCDA)或10,12-二十三碳二炔酸(TCDA)。
所述二乙炔单体与双(6-甲酰基苯氧基)-二吡啶铜(II)的质量比为1:0.2~1:1.6。
所述二甲亚砜-去离子水混合溶剂中,二甲亚砜与去离子水的体积比为1:5~1:9。
所述混合溶液中,二乙炔单体与双(6-甲酰基苯氧基)-二吡啶铜(II)的总量为0.5~1.6 mg/mL。
二、PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的热致可逆变色性能测试
将PDA/ 双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料在室温~80℃水浴加热逐渐升温,并对悬浮液颜色变化进行拍摄。室温下,PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料呈现蓝色;随着温度的不断升高,复合材料的颜色逐渐由蓝色过渡为紫色,然后变为红色,最后变为橙黄色;停止加热冷却到室温后,复合材料返回至紫色。因此,PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料具有热致可逆变色的性能,具有温敏性,颜色能够实现多次可逆转变,具备很好的温度传感器条件。
本发明复合材料PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)热致可逆变色性的机理:通过引入铜配体,PDA和铜配体之间的相互作用,使得加热后无序的PDA构象冷却后可以恢复到初始的有序构象排列,从而使复合材料从橙黄色在一定时间内返回至紫色。
综上所述,本发明PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料复合材料制备方法简便,成本低廉。该复合材料在室温~80℃区间,随着温度的不断升高,材料的颜色由室温的蓝色→紫色→红色→橙黄色;停止加热冷却至室温后,复合材料颜色恢复至紫色。复合材料具有极佳的热敏性并在室温~80℃间多次热致可逆变色,变色颜色多样,可作为温度传感器在众多领域得到运用。
附图说明
图1为不同温度下聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的紫外-可见吸收光谱。
图2为不同温度下聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的紫外-可见吸收光谱。
具体实施方式
下面通过具体实施例对本发明PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备及热致可逆变色性能作进一步说明。
实施例1、聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备和可逆热致变色性能
(1)双(6-甲酰基苯氧基)-二吡啶铜(II)的制备:在三乙胺存在下,将0.244g邻羟基苯甲醛加入20mL乙醇中形成溶液,再加入0.09g吡啶混合后,30℃下将混合溶液搅拌30~60 min,再加入0.199g Cu(OAc)2 .H2O继续搅拌30~60 min。从母液中回收晶体,将其滤出,用乙醇洗涤,然后在真空下干燥即得。
(2)聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备:取10 mg 10,12-二十五碳二炔酸(PCDA)溶解在10 mL二甲亚砜-去离子水混合溶剂(二甲亚砜与去离子水体积比为1:9),得PCDA溶液;将该溶液与10 mL 分散了6 mg双(6-甲酰基苯氧基)-二吡啶铜(II)的去离子水溶液混合,在20~80℃超声30~80 min,冷却至室温后低温静置8~16 h,得到绿色悬浮液;将绿色悬浮液置于波长为254 nm紫外光下照射聚合45 min,得到蓝色悬浮液—聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料。
(3)聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)的可逆热致变色性能的测试:将聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料在30~80℃水浴逐渐加热升温,测UV-vis吸收光谱,同时拍照记录颜色变化。随着体系温度升高,聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料均由蓝色过渡为紫色再变为红色最后为变为橙黄色,完全变为橙黄色后再自然冷却降温,橙黄色在一定时间内返回至紫色。
图1为聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料在不同温度下紫外-可见吸收光谱。由图1可知,室温下,聚(PCDA)/ 双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料呈现蓝色,在610nm处有最大吸收峰,随着温度的不断升高,复合材料的颜色逐渐由蓝色过渡为紫色,然后变为红色,最后变为橙黄色,同时吸收峰发生蓝移伴随吸光强度上升,吸收峰移至520nm。停止加热冷却至室温后,复合材料由橙黄色恢复至紫色。
实施例2、聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备和可逆热致变色性能
(1)双(6-甲酰基苯氧基)-二吡啶铜(II)的制备:同实施例1;
(2)聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料的制备:称取纯化后的10,12-二十三碳二炔酸(TCDA)10 mg,溶解于10 mL二甲亚砜-去离子水混合溶剂(二甲亚砜与去离子水体积比为1:9),得TCDA溶液。将该溶液与10 mL 分散了6 mg 双(6-甲酰基苯氧基)-二吡啶铜(II)的去离子水溶液混合,20~80℃超声30~80 min,冷却至室温后低温静置8~16 h,得到绿色悬浮液;将其置于波长为254 nm紫外光下照射聚合45min,得到蓝色悬浮液—聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)。
可逆热致变色性能的测试结果表明:聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)与聚(PCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)有相似的热致可逆变色性能。
图2为聚(TCDA)/双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料在不同温度下紫外-可见吸收光谱。由图2可知,室温下,聚(TCDA)/ 双(6-甲酰基苯氧基)-二吡啶铜(II)复合材料呈现蓝色,在610 nm左右处有最大吸收峰,随着温度的不断升高,复合材料的颜色逐渐由蓝色过渡为紫色,然后变为红色,最后变为橙红色,同时吸收峰发生蓝移伴随吸光强度上升,吸收峰移至520 nm左右。冷却至室温,复合材料由橙红色返回至紫色。

Claims (5)

1.基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,将二乙炔单体 DA溶于二甲基亚砜-去离子水混合溶剂中;将双(6-甲酰基苯氧基)-二吡啶铜(II)溶于二甲基亚砜后加入到二乙炔单体溶液中形成混合溶液;然后将混合溶液在20~80℃下超声30~80 min,冷却至室温后进行低温自组装8~16 h,得绿色悬浮液;最后将绿色悬浮液置于波长254 nm的紫外光下照射聚合15~55min,得到均匀的蓝色热致可逆变色复合材料PDA/双(6-甲酰基苯氧基)-二吡啶铜(II)。
2.如权利要求1所述基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,其特征在于:所述二乙炔单体为10,12-二十三碳二炔酸或10,12-二十五碳二炔酸。
3.如权利要求1所述基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,其特征在于:所述二乙炔单体与双(6-甲酰基苯氧基)-二吡啶铜(II)的质量比为1:0.2~1:1.6。
4.如权利要求1所述基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,其特征在于:所述二甲基亚砜-去离子水混合溶剂中,二甲亚砜与去离子水的体积比为1:5~1:9。
5.如权利要求1所述基于PDA 和双(6-甲酰基苯氧基)-二吡啶铜(II)的热致可逆变色复合材料的制备方法,其特征在于:所述混合溶液中,二乙炔单体与双(6-甲酰基苯氧基)-二吡啶铜(II)的总量为0.5~1.6 mg/mL。
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