CN109384194A - 一种电子皮肤非固相生物压力传感器的制备方法 - Google Patents
一种电子皮肤非固相生物压力传感器的制备方法 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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Abstract
本发明采用同步聚合技术提供了一种电子皮肤非固相生物压力传感器的制造,其特征在于:1)两柔性基底;2)导电层位于两柔性基底上,做电极;3)一纳米级厚度的超疏层位于电极之上;4)一电解质液或高分子凝胶液滴封装于两超疏水电极中间,与之接触,并通过高分子粘结剂封装。该全新结构的基于超疏界面原理的电容式非固相生物压力传感器,所采用的柔性衬底使其具有高柔性,易弯曲,可穿戴等特点;超疏界面使所封装的液体具有良好的粘弹性,保证了传感器具有较高的灵敏度,低功耗和短响应等特点;制备过程中无任何复杂微加工过程,且所用原料易得,成本优势明显,实用性更强,可很好的应用于可穿戴电子皮肤,移动医疗和人工智能领域。
Description
技术领域
本发明涉压力传感器领域,特别是一种柔性非固相生物压力传感器的制备方法。
背景技术
信息、生物和新材料被认为是21世纪发展最快、最热门的研究领域。现代信息技术的三大支柱分别是信息的采集、传输和处理技术,分别对应于传感器技术、通讯技术和计算机技术。传感器技术作为信息的源头技术是现代科学发展的基础和标志,已被广泛应用于各个学科。近年来,生物力学和医学工程作为一门新兴的交叉学科,在世界范围内引起了广泛而深入的研究。电子皮肤正是将传感器技术应用于生物力学和医学工程的新兴研究热点,越来越受到康复医学、矫形外科、医疗器械等学科和行业的医生、科研工作者的重视。
在医疗领域,随着人们生活水平的不断提高,自我保健意识的增强,各种慢性病、常见病也逐步年轻化,特别是中国社会老龄化进程的加快,可穿戴的家用医疗、移动医疗电子产品逐步走入普通家庭。它主要通过体征数据(如心率、脉率、呼吸频率、体温、热消耗量、血压、血糖和血氧、激素和BMI指数,体脂含量)的动态监测来帮助用户管理重要的生理活动,提供全面的临床诊断数据,实现对疾病的早发现、早预防和早治疗。可穿戴的家用医疗、移动医疗电子产品为人们建立了变被动为主动的健康管理生活方式,营造了一种新的生活理念,市场前景非常广阔。
目前,可穿戴的家用医疗、移动医疗电子产品以其方便、实用和有效性逐步被家庭和个人所接受。但市场上的相关电子产品也种类繁多,良莠不齐。如Google glass,、苹果公司的iwatch,、心率监控器、可穿戴式健身追踪器、可分析人体成分的体重计等。这些产品都存在一些普遍性的问题:产品体积较大,并未实现真正的可穿戴;体征数据监测上也不够准确,娱乐性较强;硅基设备制备工艺复杂;非透明,成本较高,驱动电压较大等。
可穿戴医疗设备的核心部件是能够感知、收集并传输各种体征数据的生物传感器,各类生物传感器的小型化和精确度的提高。而医疗设备用生物压力传感器电子皮肤技术的发展,为新一代以“轻、薄、柔、透、准”为基本特征的可穿戴家用医疗、移动医疗电子产品提供了新的发展契机。电子皮肤技术所代表的生物传感器轻量化革新,为可穿戴医疗设备的小型化、微型化提供了可能。
中国发明专利2013103960094就提供了一种压阻式电子皮肤及其制备方法,其所述压阻式电子皮肤采用碳纳米管薄膜为导电层和具有微纳米图案的聚二甲基硅氧烷、聚苯二甲酸乙二酯、聚乙烯醇、聚乙烯醇缩甲醛、聚乙烯等材质为基底,使得基底具有高柔性易弯曲等优点。此外中国发明专利201310756674X也公布了一种凸起式柔软压敏元件,该压敏元件底层封装薄膜为边缘位置上覆合有一对薄型电极的绝缘薄膜,利用溶液混合法制备成的表面具有阵列式凸起块的导电高分子复合材料薄膜,顶层封装薄膜为表面具有阵列式凸起块的高分子材料薄膜。该压敏原件结构复杂,难以实现大规模生产。
如上所述,尽管目前已经报道了很多基于有机场效应晶体管型、电容式和压阻式的电子皮肤,但却各有利弊,例如,复杂的加工工艺和器件结构、较大的驱动电压、较低的灵敏度、刚性硅基材料的使用使得器件具有非透明和非柔性等特点也限制了器件的使用范围。因此,确有必要提供一种结构简单、高灵敏度、高精确度和耐用的人工电子皮肤。
发明内容
本发明的目的是提供一种全新结构的,基于超疏界面原理的非固相压力传感器,具有柔性,可穿戴,低成本,高灵敏度,快速响应等特点。为了达到上述目的,本发明提供了一种电容式非固相压力传感器及制备方法,其包括一下特征方法:
在柔性基底上通过掩膜、气相沉积或在柔性薄膜表面通过喷墨打印导电材料等方法制备电极图案;
电极表面超疏水或超亲水层可以通过自组装疏水或亲水分子层,疏水或亲水高分子齐聚物分子膜转移,微加工制备微纳结构等方法制备;
将一定体积的电解质液或高分子凝胶滴等通过微型注射器、针式打印机,喷墨打印机等方法沉积到具有超疏界面的电极表面,并在上表面封装另一具有超疏界面的电极层,构成压力传感器。
本发明专利中所述超疏界面是指超疏水、超疏油或者双疏界面等疏液界面;
步骤中所述的柔性基底,包括但不限于具有柔性特性的聚二甲基硅氧烷,聚酯,聚乙烯,纸张,纤维膜等;
步骤中所述的电极图案是由金、银、铜、碳、铂、镁、铝、石墨烯、碳纳米管、ITO、导电高分子等导电性材料中的一种或一种以上材料组成;
步骤中所述的超疏层的材料,是其与非固相柔性体接触角大于80°的一类材料。包括但不限于表面能较低的含氟的小分子或高分子,聚二甲基硅烷。
步骤中所述的电解质液包括但不限于无机盐溶液和离子液体,如氯化钠,氯化钾,碳酸钠中的一种或者一种以上;
步骤中所述的高分子凝胶包括但不限于有机导电凝胶、导电溶胶;
步骤中所述的界面封装材料,包括但不限于有机硅类,聚氨酯类,环氧树脂类;
本发明所提供了一种电容式非固相压力传感器及制备方法,相对于现有技术,其发明的积极效果在于:
a.所采用的柔性衬底使其具有高柔性,易弯曲,可穿戴等特点;
b.超疏水界面使所封装的液体具有良好的粘弹性,保证了传感器具有较高的灵敏度,低功耗和短响应等特点;
c.本发明所述方法给柔性基底的选择提供了更高的空间;
d.该电子皮肤制备过程中无任何复杂微加工过程;
e.本发明制备的传感器实用性更强,可很好的应用于可穿戴电子皮肤,移动医疗和人工智能领域。
附图说明
图1为该新型超疏水非固相压力传感器结构的剖面示意图。其中,1 柔性基底;2 导电电极;3 施加外力;4. 粘结层;5. 疏水层;6. 电解液滴。
图2为该新型超疏水非固相压力传感器结构的结构示意图。其中,1 柔性基底;2导电电极;4. 粘结层;5. 疏水层;6. 电解液滴。
图3-a为该新型超疏水非固相压力传感器测试过程;图3-b为该新型超疏水非固相压力传感器在周期性外力作用下,电容时间变化曲线。
具体实施方案
下面的实施例将结合说明书附图对本发明予以进一步的说明。
实施案例1 一种应用于电子皮肤的超疏水非固相压力传感器结构的制备方法,具体为:1)PET基银导电膜的制备: 将纳米银导电墨水按照一定的图案,通过喷墨打印的方法沉积在PET基材上,在150 ℃条件下烧结30分钟;2)疏水层制备:将固化后的聚二甲基硅氧烷(PDMS)贴合在导电膜区域30分钟后,剥离即可。3)电解液制备:将一定量的氯化钠溶解在10 g去离子水中,直至饱和;4)饱和食盐水水滴(3 ul)沉积:将饱和食盐水通过微量注射器沉积在电极疏水区域;5) 水滴空腔(5 mm)的实现:双面胶通过打孔机打孔, 使水滴位于空腔中心;6)传感器封装:将另一疏水PET基电极通过环氧类双面胶来实现封装。
实施案例2 一种应用于电子皮肤的超疏水非固相压力传感器结构的制备方法,具体为:1)聚乙烯基碳纳米管导电膜的制备: 将碳纳米管按照一定的图案沉积在聚乙烯基材上;2)疏水层制备:将固化后的聚二甲基硅氧烷(PDMS)贴合在导电膜区域30分钟后,剥离即可。3)电解液制备:制备饱和氯化钠溶液;4)饱和食盐水水滴沉积:将饱和食盐水通过微量注射器沉积在电极疏水区域;5) 水滴空腔的实现:双面胶通过打孔机打孔, 使水滴位于空腔中心;6)传感器封装:将另一疏水聚乙烯基电极通过环氧胶封装。
实施案例3 一种应用于电子皮肤的超疏水非固相压力传感器结构的制备方法,具体为:1)PET基银导电膜的制备: 将纳米银导电墨水按照一定的图案,通过喷墨打印的方法沉积在PET基材上,在150 ℃条件下烧结30分钟;2)疏水层制备:自组装聚二甲基硅烷与导电电极膜表面。3)电解液制备:制备饱和氯化钠溶液;4)饱和食盐水水滴沉积:将饱和食盐水通过微量注射器沉积在电极疏水区域;5) 水滴空腔的实现:双面胶通过打孔机打孔,使水滴位于空腔中心;6)传感器封装:将另一PET基电极通过环氧胶封装。
实施案例4 一种新型,应用于电子皮肤的超疏水非固相压力传感器结构的制备方法,具体为:1)聚二甲基硅氧烷基银导电膜的制备: 将纳米银导电墨水按照一定的图案,通过喷墨打印的方法沉积在聚二甲基硅氧烷基材上;2)疏水层制备:将固化后的聚二甲基硅氧烷(PDMS)贴合在导电膜区域30分钟后,剥离即可。3)电解液制备:将一定量的氯化钠溶解在10 g去离子水中,直至饱和;4)饱和食盐水水滴(3 ul)沉积:将饱和食盐水通过微量注射器沉积在电极疏水区域;5)水滴空腔的实现:双面胶通过打孔机打孔, 使水滴位于空腔中心;6)传感器封装:将另一疏水聚二甲基硅氧烷基电极通过环氧类双面胶来实现封装。
Claims (9)
1.一种电子皮肤基非固相压力传感器的制备方法,其特征在于,包括:
两柔性基底;
一定图案的导电层位于两柔性基底上,做电极;
一纳米级或微米级厚度的超疏层位于电极之上;
一电解质液或高分子凝胶液滴封装于两超疏水电极中间,与之接触;
按照上述各层结构封装构成压力传感器。
2.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述至少有一层柔性基底,包括但不限于聚对苯二甲酸乙二醇酯,聚氯乙烯,聚二甲氧基硅烷,聚碳酸酯,聚丙烯薄膜等。
3.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的电极图案材料包括但不限于金、银、铜、碳、铂、镁、铝、石墨烯、碳纳米管、ITO,导电高分子等中的一种或几种。
4.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的电极图案在制备工艺包括但不限于掩膜光刻,气相沉积,喷墨打印,丝网印刷,纳米压印,凸版印制等及相应的Roll-2-Roll印制工艺。
5.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的超疏层材料上包括但不限于含氟的小分子或高分子,表面能较低的聚二甲基硅烷及其衍生物等。
6.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的超疏层是指具有超疏水、超疏油或者双疏特性的疏液界面,其液体接触角需大于80°。
7.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的液体电解质包括但不限于无机盐溶液,如氯化钠,氯化钾,碳酸钠,等一种或者几种,可以为离子液体,也可以为有机导电凝胶等。
8.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,中所述的电解质液或高分子凝胶液滴在沉积方法包括但不限于喷墨打印,针式打印,微量注射器等。
9.按照权利要求1所述的一种电子皮肤基非固相压力传感器的制备方法,其特征在于,⑤中所述的用于传感器封装的胶黏剂包括但不限于有机硅类,聚氨酯类,环氧树脂类等。
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