CN106916248A - 一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法 - Google Patents

一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法 Download PDF

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CN106916248A
CN106916248A CN201710269281.4A CN201710269281A CN106916248A CN 106916248 A CN106916248 A CN 106916248A CN 201710269281 A CN201710269281 A CN 201710269281A CN 106916248 A CN106916248 A CN 106916248A
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马建军
徐世美
王丰
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Xinjiang University
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Abstract

本发明涉及一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法。其特征在于,包括下列步骤:将单体1和单体2溶解在水中,常温下搅拌至分散均匀;再加入钨酸钠溶液,混合均匀;之后依次加入交联剂和引发剂,搅拌至均匀;将上述混合液在室温下反应至复合水凝胶形成。单体1质量与单体2质量的摩尔比为5:5‑9:1;钨酸钠质量为体系中总水质量的0.1%‑5%;交联剂质量为单体质量的0.3%‑0.6%;引发剂质量为单体质量的0.3%‑0.6%。本发明提供的复合水凝胶的制备工艺简单,制得的水凝胶具有温度和pH双重响应,且响应可调,可满足更多领域需要。

Description

一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备 方法
技术领域
本发明涉及一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法。属于智能材料技术领域。
背景技术
智能水凝胶,是一种能够对外界刺激做出响应的水凝胶,也称环境响应性水凝胶,典型的外界刺激包括温度、pH和光等等。由于功能的多样性和良好的生物相容性,智能水凝胶被广泛应用在生物,医学,催化等领域。温敏性水凝胶是指可以随着外界温度的改变而发生响应行为的一类智能水凝胶。它在相转变温度之上和相转变温度之下表现出截然不同的性质,如透明度和体积的改变。如果温敏性水凝胶体系中还含有pH响应单元,则得到的凝胶除了具有温度响应以外还具有pH响应,称之为温度和pH双重响应性水凝胶。
过去十几年,为了提升水凝胶的性能,拓展应用范围,各国研究者采用多种方法对水凝胶改性。有机无机复合是一种常见的改性方式,即在原有的三维网络结构中引入无机粒子,通过无机粒子与聚合物官能团间的相互作用,构成物理交联网络。从而使网络内部的相互作用力形式发生改变,达到改性的目的。
发明内容
本发明的目的是提供一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法,其特征在于:该方法制备工艺简单,制得的水凝胶具有温度和pH双重响应,且响应可调,可满足更多领域需要。
为了达到上述目的,本发明的制备方法是:将单体1和单体2溶解在水中,常温下搅拌至分散均匀;再加入钨酸钠溶液,混合均匀;之后依次加入交联剂和引发剂,搅拌至均匀;将上述混合液在室温下反应至复合水凝胶形成。
所述单体1为N,N-二乙基丙烯酰胺、N-异丙基丙烯酰胺、甲基丙烯酸-N,N-二甲氨基乙酯、N-乙烯基吡咯烷酮中的一种。
所述单体2为甲基丙烯酸-N,N-二甲氨基乙酯、N-乙烯基吡咯烷酮、丙烯酸、甲基丙烯酸中的一种。
所述交联剂为N,N-亚甲基双丙烯酰胺。
所述引发剂为过硫酸铵、过硫酸钾、过硫酸铵-亚硫酸氢钠、过硫酸钾-亚硫酸氢钠、或过硫酸钾-四甲基乙二胺中的一种。
单体1质量与单体2质量的摩尔比为5:5-9:1。
钨酸钠质量为体系中总水质量的0.1%-5%。
交联剂质量为单体质量的0.3%-0.6%。
引发剂质量为单体质量的0.3%-0.6%。
本发明的原理是:采用一锅法通过自由基共聚制备了温度和pH双重响应性且均可调的聚合物/钨酸钠复合水凝胶。
有益效果
(1) 本发明利用单体与钨酸钠的配位作用,采用一锅法制备了温度和pH双重响应的聚合物/钨酸钠复合水凝胶;
(2) 本发明的制备工艺简单,制得的聚合物/钨酸钠复合水凝胶具有温度和pH双重响应,且响应可调。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术的描述中所需要使用的附图作简单地介绍,下面描述中的附图仅仅是本发明的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他附图。
图1为实施例1所得复合水凝胶的透光率随温度变化图;图2为实施例1所得复合水凝胶在不同pH下的溶胀度曲线图。
具体实施方式
下面结合具体实施例对本发明做进一步详细阐述。这些实施例仅用于说明本发明而不用于限制本发明的范围。此处应理解,在阅读本发明授权的内容之后,本领域技术人员可对本发明做各种改动或修改,这些等价形式同样落于本申请所附权利要求书所限定的范围。
实施例1
将2.8 g N,N-二乙基丙烯酰胺和1.5 g甲基丙烯酸-N,N-二甲氨基乙酯单体溶解14.8g水中,常温下搅拌至分散均匀后;再加入0.2 g质量浓度为16.7%的钨酸钠溶液,混合均匀后;依次加入0.02 g N,N-亚甲基双丙烯酰胺、0.02 g过硫酸钾和0.006 g亚硫酸氢钠,搅拌至均匀;将上述混合液在室温下反应24 h至复合水凝胶形成。其LCST为40.8°C。当pH=3时,溶胀度为298 g/g,当pH=7时,溶胀度为145 g/g,当pH=10时,溶胀度为189 g/g。
实施例2
同实施例1。所选用的N,N-二乙基丙烯酰胺为2.0 g和甲基丙烯酸-N,N-二甲氨基乙酯为2.4 g。其LCST为52.8°C。
实施例3
同实施例1。所选用的N,N-二乙基丙烯酰胺为2.4 g和甲基丙烯酸-N,N-二甲氨基乙酯为2.0 g。其LCST为46.8°C。
实施例4
同实施例1。所选用的N,N-二乙基丙烯酰胺为3.2 g和甲基丙烯酸-N,N-二甲氨基乙酯为1.0 g。其LCST为32.1°C。
实施例5
同实施例1。所选用的N,N-二乙基丙烯酰胺为3.6 g和甲基丙烯酸-N,N-二甲氨基乙酯为0.2 g。其LCST为19.7°C。
实施例6
同实施例1。所选用的质量浓度为16.7%的钨酸钠溶液为0.4 g。当pH=3时,溶胀度为274g/g,当pH=7时,溶胀度为104 g/g,当pH=10时,溶胀度为149 g/g。
实施例7
同实施例1。所选用的质量浓度为16.7%的钨酸钠溶液为0.6 g。当pH=3时,溶胀度为250g/g,当pH=7时,溶胀度为99 g/g,当pH=10时,溶胀度为118 g/g。
上述实施例为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他的任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。

Claims (3)

1.一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法,其特征是包括以下步骤:
将单体1和单体2溶解在水中,常温下搅拌至分散均匀;再加入钨酸钠溶液,混合均匀;之后依次加入交联剂和引发剂,搅拌至均匀;将上述混合液在室温下反应至复合水凝胶形成;
所述单体1为N,N-二乙基丙烯酰胺、N-异丙基丙烯酰胺、甲基丙烯酸-N,N-二甲氨基乙酯、N-乙烯基吡咯烷酮中的一种;
所述单体2为甲基丙烯酸-N,N-二甲氨基乙酯、N-乙烯基吡咯烷酮、丙烯酸、甲基丙烯酸中的一种;
所述交联剂为N,N-亚甲基双丙烯酰胺;
所述引发剂为过硫酸铵、过硫酸钾、过硫酸铵-亚硫酸氢钠、过硫酸钾-亚硫酸氢钠、或过硫酸钾-四甲基乙二胺中的一种。
2.如权利要求1所述一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法,其特征在于,采用一锅法通过自由基共聚的方法制备。
3.如权利要求1所述一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法,单体1质量与单体2质量的摩尔比为5:5-9:1;钨酸钠质量为体系中总水质量的0.1%-5%;交联剂质量为单体质量的0.3%-0.6%;引发剂质量为单体质量的0.3%-0.6%。
CN201710269281.4A 2017-04-24 2017-04-24 一种温度和pH双重响应聚合物/钨酸钠复合水凝胶的制备方法 Pending CN106916248A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108034073A (zh) * 2017-12-06 2018-05-15 北京服装学院 一种智能变化的颗粒及其制备方法
CN114989336A (zh) * 2022-06-17 2022-09-02 盐城工学院 一种小分子交联剂超吸水树脂材料及其制备方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108034073A (zh) * 2017-12-06 2018-05-15 北京服装学院 一种智能变化的颗粒及其制备方法
CN108034073B (zh) * 2017-12-06 2021-04-06 北京服装学院 一种智能变化的颗粒及其制备方法
CN114989336A (zh) * 2022-06-17 2022-09-02 盐城工学院 一种小分子交联剂超吸水树脂材料及其制备方法

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