CN113696391A - 一种微针离子凝胶压力传感器件的制备方法 - Google Patents

一种微针离子凝胶压力传感器件的制备方法 Download PDF

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CN113696391A
CN113696391A CN202111053671.0A CN202111053671A CN113696391A CN 113696391 A CN113696391 A CN 113696391A CN 202111053671 A CN202111053671 A CN 202111053671A CN 113696391 A CN113696391 A CN 113696391A
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李秋瑾
董裕
巩继贤
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Abstract

本发明涉及一种微针离子凝胶压力传感器件的制备方法，属于复合材料领域。这种具有特殊结构传感器的主要特点是应变范围广、灵敏度高和响应及时等，不仅能够实现对人体大运动的实时监测，还能对人体微小的生理信号进行监测。本发明中微针离子凝胶压力传感器件的制备方法为，先将含有大量离子液体的前驱体溶液导入模具中，然后通过紫外聚合的方法制得微棱锥结构的离子凝胶，最后在其两端连接导线制备得到。本发明不仅制备方法简单，绿色环保，且制得的压力传感器具有较高的灵敏度和较宽的压力响应范围，为未来柔性压力传感器在人体运动监测和医疗健康监测等领域的广泛应用提供了研究思路。

Description

一种微针离子凝胶压力传感器件的制备方法
技术领域
本发明涉及一种微针离子凝胶压力传感器件的制备方法，属于复合材料领域。
背景技术
近年来，随着新型医疗监测、人机交互、可穿戴电子产品等领域的蓬勃发展，柔性压力传感器备受关注。传统的薄膜基传感器的研究已经取得了一定的研究进展，但通常为了方便压力传感器的应用，传感器的厚度只有几十到几百微米，能够被压缩的距离非常有限，因此薄膜基压力传感器一般表现出较低的灵敏度。那么制备出高灵敏度的压力传感器不能通过简单的薄膜结构来实现。在薄膜上构建微结构，通过增加其受力时的接触面积，从而大大增加其受力的形变范围，达到提高传感器灵敏度的效果。具有微棱锥阵列的离子凝胶因其独特的结构在柔性压力传感器领域研究广泛。
发明内容
本发明所要解决的问题在于针对现有薄膜基传感器灵敏度低、应变范围小的不足，提供了一种微针离子凝胶压力传感器件的制备方法。这种具有特殊结构传感器的主要特点是应变范围广、灵敏度高和响应及时等，不仅能够实现对人体大运动的实时监测，还能对人体微小的生理信号进行监测。本发明中微针离子凝胶压力传感器件的制备方法为，先将含有大量离子液体的前驱体溶液导入模具中，然后通过紫外聚合的方法制得微棱锥结构的离子凝胶，最后在其两端连接导线制备得到。本发明不仅制备方法简单，绿色环保，且制得的压力传感器具有较高的灵敏度和较宽的压力响应范围，为未来柔性压力传感器在人体运动监测和医疗健康监测等领域的广泛应用提供了研究思路。
为实现上述目的，本发明采用的技术方案如下：
(1)前驱体溶液的制备：依次加入正硅酸四乙酯(TEOS)、1-丁基-3-甲基咪唑四氟硼酸盐([Bmim][BF4])、N，N’-亚甲基丙烯酰胺(MBA)、N，N-二甲基丙烯酰胺、酮戊二酸和盐酸溶液，在氮气通入的条件下，磁力搅拌一定时间得到混合均匀的离子溶液，将此离子溶液避光放置在恒定温度的烘箱中持续加热一段时间，得到前驱体溶液；
(2)模具的选择：选择具有特定尺寸、特定材质的模具；
(3)微针阵列离子凝胶的制备：将上述步骤(1)制得的前驱体溶液滴入选定的膜具中，在烘箱中放置一段时间，用一定强度的紫外光照射使其充分聚合。最后，通过一段时间的干燥得到微针阵列离子凝胶；
(4)微针阵列的离子凝胶基传感器的制备：将上述步骤(3)中的离子凝胶作为传感元件，通过在其两端连接导线得到离子凝胶基传感器。
作为优选，步骤(1)中正硅酸四乙酯(TEOS)的用量为0.1-1g，1-丁基-3甲基-咪唑四氟硼酸盐的用量为5-10g，N，N’-亚甲基丙烯酰胺(MBA)的用量为1-2g，N，N-二甲基丙烯酰胺的用量为0.4％MBA，酮戊二酸用量为1-3mg，盐酸溶液的浓度为1-20mmol/L，用量为0.1-1mL。氮气通入时间为10-30min，磁力搅拌时间为1-2h，恒定烘箱温度条件为10-60℃，加热时间为1-30h；
作为优选，步骤(2)中模具的尺寸为，微针高度为1-500μm，微针底边长度为1-500μm，微针底边宽度为1-500μm，微针阵列为10×10，材质为具有强疏水性的PDMS材料；
作为优选，步骤(3)中滴入前驱体溶液的用量为1-5mL，烘箱放置一段时间应在真空烘箱中放置1-60min，紫外光光源强度为75％，照射时间为1-30min。离子凝胶的干燥方式为真空干燥，干燥温度为10-60℃，干燥时间为1-30h。
由于采用上述技术方案，具有以下有益效果：
(1)前躯体溶液的制备过程所使用的主要原料为离子液体，离子液体具有不易挥发、热稳定性好、难燃、电导率高和绿色无污染等特点，制得的前驱体溶液不仅能提供良好的导电性，还具有较好的环境友好性；
(2)本发明制备的传感元件为离子凝胶，离子凝胶是由离子液体与聚合物复合而成并可以在极端温度下保持优异导电性的一种新型柔性透明材料，不仅具有独特的离子导电性和热稳定性，还兼备良好的力学性能与高传感性能；
(3)本发明制得的特定微针阵列结构的离子凝胶具有高灵敏度和宽的应变响应范围等优异的性能，且其制备方法简单，绿色环保；
(4)本发明制备的离子凝胶基传感器在人体实时运动监测、医疗健康检测等领域表现出广阔的应用前景。
附图说明
以下附图仅旨在于对本发明做示意性说明及解释，并不限于本发明的范围。其中：
图1：为本发明中实施例1的结果图。
图2：为本发明中实施例2的结果图。
图3：为本发明中实施例3的结果图。
具体实施方式
下面结合附图与具体的实施方案叙述本发明。除非特别说明，本发明中所用的技术手段均为本领域技术人员所公知的方法。另外，实施方案应理解为说明性的，而非限制本发明的范围，本发明的实质和范围仅由权利要求书所限定。对于本领域技术人员而言，在不背离本发明实质和范围的前提下，对这些实施方案中的物料成分和用量进行的各种改变或改动也属于本发明的保护范围。
实施例1：选用特定的模具，采用紫外聚合的方法制得微针阵列离子凝胶。如图1所示，前驱体溶液在紫外灯照射下完全固化，形成整齐的微针阵列离子凝胶。
实施例2：将所制得的特定形状的离子凝胶两端连接导线得到离子凝胶基传感器，将其贴于人体手腕处，进行手腕处脉搏信号的收集。如图2所示，所制得的离子凝胶基传感器具有一定的柔性，能够与人体很好的接触。
实施例3：采用此微针阵列的离子凝胶基传感器件对人体手腕处脉搏进行实时监测。如图3所示，该传感器能够将人体的脉搏信号转换成电信号，并且能够对每次的脉搏快速响应，从而实现对人体手腕处脉搏的实时监测。

Claims (4)

1.一种微针离子凝胶压力传感器件的制备方法，包括以下步骤：
(1)前驱体溶液的制备：依次加入正硅酸四乙酯(TEOS)、1-丁基-3-甲基咪唑四氟硼酸盐([Bmim][BF4])、N，N’-亚甲基丙烯酰胺(MBA)、N，N-二甲基丙烯酰胺、酮戊二酸和盐酸溶液，在氮气通入的条件下，磁力搅拌一定时间得到混合均匀的离子溶液，将此离子溶液避光放置在恒定温度的烘箱中持续加热一段时间，得到前驱体溶液；
(2)模具的选择：选择具有特定尺寸、特定材质的模具；
(3)微针阵列离子凝胶的制备：将上述步骤(1)制得的前驱体溶液滴入选定的膜具中，在烘箱中放置一段时间，用一定强度的紫外光照射使其充分聚合。最后，通过一段时间的干燥得到微针阵列离子凝胶；
(4)微针阵列的离子凝胶基传感器的制备：将上述步骤(3)中的离子凝胶作为传感元件，通过在其两端连接导线得到离子凝胶基传感器。
2.根据权利要求1所述一种微针离子凝胶压力传感器件的制备方法，其特征在于，上述步骤(1)中正硅酸四乙酯(TEOS)的用量为0.1-1g，1-丁基-3甲基-咪唑四氟硼酸盐的用量为5-10g，N，N’-亚甲基丙烯酰胺(MBA)的用量为1-2g，N，N-二甲基丙烯酰胺的用量为0.4％MBA，酮戊二酸用量为1-3mg，盐酸溶液的浓度为1-20mmol/L，用量为0.1-1mL，氮气通入时间为10-30min，磁力搅拌时间为1-2h，恒定烘箱温度条件为10-60℃，加热时间为1-30h。
3.根据权利要求1所述一种微针离子凝胶压力传感器件的制备方法，其特征在于，上述步骤(2)中模具的尺寸为，微针高度为1-500μm，微针底边长度为1-500μm，微针底边宽度为1-500μm，微针阵列为10×10，材质为具有强疏水性的PDMS材料。
4.根据权利要求1所述一种微针离子凝胶压力传感器件的制备方法，其特征在于，上述步骤(3)中滴入前驱体溶液的用量为1-5mL，烘箱放置一段时间应在真空烘箱中放置1-60min，紫外光光源强度为75％，照射时间为1-30min，离子凝胶的干燥方式为真空干燥，干燥温度为10-60℃，干燥时间为1-30h。
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CN114324153A (zh) * 2021-12-16 2022-04-12 河海大学 基于机器压觉的结构物表面裂缝检测装置和检测识别方法

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