CN108484973B - 一种采用铁酸钡做交联剂制备水凝胶的方法 - Google Patents
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Abstract
本发明涉及一种采用铁酸钡做交联剂制备水凝胶的方法。本发明通过采用铁酸钡纳米颗粒制备出聚丙烯酸体系的水凝胶，研究成果对该体系复合水凝胶在传感器元件等电子设备领域的应用具有一定的理论意义和应用价值。采用铁酸钡纳米颗粒（0.001 g‑5.000 g）作为交联剂，过硫酸铵（0.2 g‑3.0 g）做氧化剂，将丙烯酸（2 mL‑20 mL）单体与去离子水（50 mL‑300 mL）混合在一起于50℃‑70℃下机械和超声相结合的方法搅拌1 h‑6 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
Description
技术领域
本发明属于材料制备技术领域，具体涉及一种采用铁酸钡做交联剂制备水凝胶的方法。
背景技术
水凝胶是一种可在水中溶胀并保持大量水分而又不溶解的交联聚合物。具有优良的理化性质和生物学性能，在化妆品、医药、农用、建筑以及石油化工等行业领域都具有广泛的应用。而普通化学交联的水凝胶一般力学性能较差，响应速度较慢，将无机纳米材料填加到水凝胶中制备出纳米复合水凝胶，不仅保持了纳米材料原有的功能性质，还将纳米材料的热稳定性和尺寸稳定性，以及与水凝胶吸水特性和响应性能相融合，进而大大改善了水凝胶的物理机械性能、化学特性、光电特性以及引入其他性能。如何制备出高强度高响应的智能型纳米复合水凝胶成为近期的研究热点。
铁酸钡是一种硬磁材料、高磁晶，属于M型磁铅石，是一种简单的磁铅石铁氧体，具有对称性，属于六角晶系。而磁铅石型铁氧体的晶体对称性所带有的特性是区别于其他两类立方对称型铁氧体的。M型磁铅石钡铁氧体自1952年被首次公告成功合成出来，就因其较高的单磁晶各向异性、高矫顽力、高饱和磁化强度和非常好的化学稳定性，材料成本低，而成为最为常用的永磁性材料之一。由于它特异的表观磁性特点，近年来正倍受关注，特别是在传感元件、光电材料、磁敏光记录材料、微波吸收材料等许多材料上得到了广泛的应用。由于铁酸钡是由原子半径较大的稀土元素钡和过渡金属铁元素组成，因此有潜力与聚丙烯酸中的羧酸跟形成配位键，通过交联形成丙烯酸体系水凝胶。
发明内容
本发明要解决普通化学交联的水凝胶一般力学性能较差，响应速度较慢的技术问题，提供一种采用铁酸钡做交联剂制备水凝胶的方法。
为了实现上述目的，本发明采用以下技术方案：
一种采用铁酸钡做交联剂制备水凝胶的方法，具体步骤如下：
采用铁酸钡纳米颗粒（0.001 g-5.000 g）作为交联剂，过硫酸铵（0.2 g-3.0 g）做氧化剂，将丙烯酸（2 mL -20 mL）单体与去离子水（50 mL -300 mL）混合在一起于50℃-70℃下机械和超声相结合方法搅拌1 h-6 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
本发明中，所述纳米铁酸钡的直径为40 nm -90 nm。
本发明具有以下有益效果：
本发明通过采用铁酸钡纳米颗粒做交联剂制备出水凝胶，以解决普通化学交联的水凝胶一般力学性能较差，响应速度较慢的技术问题。
附图说明
图1为采用铁酸钡纳米颗粒制备的水凝胶图片。其中：(a)为水凝胶照片，(b)为制备的水凝胶直径为25mm。
具体实施方式
下面结合实施例进一步说明本发明。
本发明通过采用铁酸钡纳米颗粒做交联剂制备出水凝胶，包括以下步骤：
采用铁酸钡纳米颗粒（0.001 g-5.000 g）作为交联剂，过硫酸铵（0.2 g-3.0 g）做氧化剂，将丙烯酸（2 mL -20 mL）单体与去离子水（50 mL -300 mL）混合在一起于50℃-70℃下机械和超声相结合方法搅拌1 h-6 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
实施例1
将0.1 g铁酸钡纳米颗粒，1.0 g过硫酸铵，10 mL丙烯酸单体加入到100 mL去离子水中，在水浴锅中60℃下加热反应6 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
实施例2
将0.3 g铁酸钡纳米颗粒，1.0 g过硫酸铵，10 mL丙烯酸单体加入到100 mL去离子水中，在水浴锅中70℃下加热反应4 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
实施例3
将1.0 g铁酸钡纳米颗粒，1.0 g过硫酸铵，10 mL丙烯酸单体加入到100 mL去离子水中，在水浴锅中70℃下加热反应3 h后，倒入聚四氟乙烯模具中得到铁酸钡纳米颗粒作为交联剂的水凝胶材料。
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和应用本发明。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本发明不限于这里的实施例，本领域技术人员根据本发明的揭示，不脱离本发明范畴所做出的改进和修改都应该在本发明的保护范围之内。
Claims (2)
1.一种采用铁酸钡做交联剂制备水凝胶的方法，其特征在于具体步骤如下：
采用0.001 g-5.000 g铁酸钡纳米颗粒作为交联剂，0.2 g-3.0 g过硫酸铵作为氧化剂，将2 mL -20 mL丙烯酸单体与50 mL -300 mL去离子水混合在一起于50℃-70℃下，采用机械和超声相结合方法搅拌1h-6h，倒入聚四氟乙烯模具中，得到铁酸钡纳米颗粒作为交联剂的水凝胶。
2.根据权利要求1所述的采用铁酸钡做交联剂制备水凝胶的 方法，其特征在于：所述纳米铁酸钡的直径为40nm -90nm。
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| DE10163399A1 (de) * | 2001-12-21 | 2003-07-10 | Sustech Gmbh & Co Kg | Nanopartikuläre Zubereitung |
| CN101921443B (zh) * | 2010-08-06 | 2011-09-28 | 浙江大学 | 纳米粒子均相掺杂的高强度智能化水凝胶的制备方法 |
| CN101935070B (zh) * | 2010-09-17 | 2012-05-09 | 东华大学 | 丙烯酸类聚合物纳米水凝胶诱导原位合成超顺磁性四氧化三铁纳米粒子的方法 |
| CN102093045B (zh) * | 2010-12-01 | 2013-01-02 | 北京航空航天大学 | 一种核壳结构钛酸钡-钡铁氧体复合粉体材料及制备方法 |
| CN102432972A (zh) * | 2011-09-28 | 2012-05-02 | 东华大学 | 一种具有磁性功能的纳米复合水凝胶的制备方法 |
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