CN112086218A - 一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法 - Google Patents
一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法 Download PDFInfo
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Abstract
本发明提出了一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，以实验室废弃的纤维素透析袋为原料，通过简单的超声透析在透析袋表面合成一层聚苯胺，成功制备具有两亲性以及超敏感的生物信号捕捉的纤维素基仿生皮肤。该材料具有优异的导电性、两亲性以及超敏感的生物信号捕捉，电阻率低，材料两侧表现出不同的亲水性,可对快速捕捉温度、光照、气体以及人体形变的信号；该仿生皮肤材料对多种生物信号有极其快速的捕捉能力，且制备简单反应条件温和，该材料在仿生皮肤领域有广阔的应用的前景。
Description
技术领域
本发明涉及一种纤维素基仿生皮肤的制备方法，特别涉及两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法。
背景技术
随着5G信息时代的到来，人类生活中的智能程度不断提高，可穿戴式人工智能电子皮肤(e-skin)将在人类生活中大量使用。通过响应外部刺激(压力，温度和湿度)生成电信号的电子皮肤可以模仿皮肤的机械和感官特性。由于良好的柔韧性，优异的导电性，高强度，长周期稳定性和轻巧性，电子皮肤已广泛用于健康监测，机器人***，人机交互和生物医学领域。
目前，仿生皮肤大多由生物相容性较差的是石油化工材料作为基底材料。MeihongLiao等人在期刊Advanced Functional Materials上发表的《Wearable,Healable,andAdhesive Epidermal Sensors Assembled from Mussel-Inspired Conductive HybridHydrogel Framework》文章(Adv.Funct.Mater.2017,1703852)介绍了聚丙烯酰胺水凝胶仿生皮肤的制备与其在人机交互和医疗保健监控应用。但是聚丙烯酰胺生物相容性差，水凝胶易失水，制约了其在人工智能传感、柔性电容器等领域的发展。
因此本发明以商业化的纤维素透析袋为原料，通过界面聚合在透析袋表面聚合一层导电聚合物。制备简单高效且复合材料具有更灵敏的信号捕捉能力以及更好的生物相容性。
发明内容
本发明的目的在于提供一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，该方法制备简单，操作简便，绿色无污染，且方便大规模生产。
本发明以商业化的纤维素透析袋为原料，通过界面聚合，制得快速捕捉多重生物信号的纤维素基仿生皮肤。
一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其具体步骤如下：
1)将纤维素透析袋置于适当温度的水浴锅中，并加热一段时间，得到预备透析袋；
2)将适当浓度的导电聚合物单体稀酸溶液加入至步骤1)得到的预备透析袋中，密封好放之装有适当浓度氧化剂稀酸溶液的烧杯，将烧杯置于低温的超声清洗仪，超声适当时间，置于25-30℃的真空烘箱烘干3-5h，得到纤维素基仿生皮肤。
所述步骤1)中所述适当温度为65-95℃，一段时间为10-60min。
所述步骤2)中所述导电聚合物单体稀酸溶液的适当浓度为0.01-0.3mol/L；导电聚合物单体为噻吩(C4H4S)，吡咯(C4H5N)，苯胺(C6H7N)和3,4-乙烯二氧噻吩(C6H6O2S)等中的一种；稀酸溶液为0.1-30wt％的盐酸(HCl)、硫酸(H2SO4)和稀硝酸(HNO3)等中的一种。
所述步骤2)中所述氧化剂稀酸溶液的适当浓度为0.01-0.3mol/L；氧化剂为过硫酸铵(APS,(NH4)2S2O8)，氯化铁(FeCl3)，过硫酸钾(K2S2O8)等中的一种；稀酸溶液为0.1-30wt％的盐酸(HCl)、硫酸(H2SO4)和稀硝酸(HNO3)等中的一种。
所述步骤2)中所述超声清洗仪的低温为-15-0℃。
所述步骤2)中所述超声适当时间为1-5h。
对本发明所获得的纤维素基仿生皮肤使用场发射扫描电镜(FF-SEM)观察复合材料的形貌；使用傅里叶红外光谱(FTIR)分析复合物的化学结构；使用水接触角使用万能电表测试其电阻变化；乙醇、甲醛以及甲苯测试其气体响应的能力，其结果如下：
(1)场发射扫描电镜(FF-SEM)测试表明纤维素基仿生皮肤中透析袋表面聚苯胺形貌粗糙，参见附图1。
(2)傅里叶红外光谱(FTIR)测试表明聚苯胺成功的聚合在透析袋上，参见附图2。
(3)纤维素基仿生皮肤具有优异的气体响应，参见附图3。
本发明制备纤维素基仿生皮肤拥有优异气体响应能力，在电子皮肤方面有广阔的应用的前景。
本发明具有的有益效果是：
本发明利用商业化的透析袋为原料制备纤维素基仿生皮肤，具有可商业化，价格低廉等优点。
附图说明
图1为实施例1制备纤维素基仿生皮肤的场发射扫描电镜(FF-SEM)测试图。
图2为实施例1制备纤维素基仿生皮肤的傅里叶红外光谱(FTIR)测试图。
图3为实施例1制备纤维素基仿生皮肤的气体响应图。
具体实验案例
下面结合具体实例，进一步阐述本发明。这些实施案例仅用于说明本发明而不用于限制本发明的范围。此外，在阅读了本发明讲授的内容之后，本领域技术人员可以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
将纤维素透析袋置于适当90℃的水浴锅中，并加热20min；将0.2mol/L C6H7N稀硫酸(10wt％)加入至透析袋中；将透析袋密封好放入之装有0.1mol/L APS稀硫酸溶(10wt％)的烧杯中；将烧杯置于-5℃的超声清洗仪中；超声2h后，置于25℃的真空烘箱烘干3h；使用乙醇测试气体响应。
实施例2
将将纤维素透析袋置于适当95℃的水浴锅中，并加热60min；将0.3mol/L C4H5N稀盐酸(30wt％)加入至透析袋中；将透析袋密封好放入之装有0.3mol/L FeCl3稀盐酸溶(30wt％)的烧杯中；将烧杯置于0℃的超声清洗仪中；超声5h后，置于30℃的真空烘箱烘干5h；使用乙醇测试气体响应。
实施例3
将将纤维素透析袋置于适当65℃的水浴锅中，并加热10min；将0.01mol/L C6H6O2S稀硫酸(0.1wt％)加入至透析袋中；将透析袋密封好放入之装有0.01mol/L K2S2O8稀硫酸溶(0.1wt％)的烧杯中；将烧杯置于-15℃的超声清洗仪中；超声3h后，置于27℃的真空烘箱烘干3h；使用乙醇测试气体响应。
实施例4
将将纤维素透析袋置于适当75℃的水浴锅中，并加热30min；将0.1mol/L C4H4S稀硝酸(20wt％)加入至透析袋中；将透析袋密封好放入之装有0.1mol/L K2S2O8稀硝酸溶(20wt％)的烧杯中；将烧杯置于-10℃的超声清洗仪中；超声4h后，置于28℃的真空烘箱烘干4h；使用乙醇测试气体响应。
实施例5
将将纤维素透析袋置于适当85℃的水浴锅中，并加热40min；将0.15mol/L C6H6O2S稀硝酸(25wt％)加入至透析袋中；将透析袋密封好放入之装有0.15mol/L K2S2O8稀硝酸溶(25wt％)的烧杯中；将烧杯置于-12℃的超声清洗仪中；超声1h后，置于29℃的真空烘箱烘干3.5h；使用乙醇测试气体响应。
Claims (6)
1.一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于，包括以下步骤：
1)将纤维素透析袋置于适当温度的水浴锅中，并加热一段时间，得到预备透析袋；
2)将适当浓度的导电聚合物单体稀酸溶液加入至步骤1)得到的预备透析袋中，密封好放之装有适当浓度氧化剂稀酸溶液的烧杯，将烧杯置于低温的超声清洗仪，超声适当时间，置于25-30℃的真空烘箱烘干3-5h，得到纤维素基仿生皮肤。
2.根据权利要求1所述的一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于：所述步骤1)中所述适当温度为65-95℃，一段时间为10-60min。
3.根据权利要求1所述的一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于：所述步骤2)中所述导电聚合物单体稀酸溶液的适当浓度为0.01-0.3mol/L；导电聚合物单体为噻吩(C4H4S)，吡咯(C4H5N)，苯胺(C6H7N)和3,4-乙烯二氧噻吩(C6H6O2S)中的一种；稀酸溶液为0.1-30wt％的盐酸(HCl)、硫酸(H2SO4)和稀硝酸(HNO3)中的一种。
4.根据权利要求1所述的一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于：所述步骤2)中所述氧化剂稀酸溶液的适当浓度为0.01-0.3mol/L；氧化剂为过硫酸铵(APS,(NH4)2S2O8)，氯化铁(FeCl3)，过硫酸钾(K2S2O8)中的一种；稀酸溶液为0.1-30wt％的盐酸(HCl)、硫酸(H2SO4)和稀硝酸(HNO3)中的一种。
5.根据权利要求1所述的一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于：所述步骤2)中所述超声清洗仪的低温为-15-0℃。
6.根据权利要求1所述的一种兼具两亲性与快速捕捉生物信号的纤维素基仿生皮肤的制备方法，其特征在于：所述步骤2)中所述超声适当时间为1-5h。
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