聚N-羟乙基丙烯酰胺-明胶基水凝胶传感器的制备及性能
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福建省科技重大专项计划项目(2020HZ06019);福建省自然科学基金计划资助项目(2022J05224);福建省中青年教师教育科研项目(JAT190517);内蒙古自治区自然科学基金资助(2019BS08005)


Preparation and Properties of Poly(N-hydroxyethyl acrylamide)-Gelatin-Based Hydrogel Sensor
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    摘要:

    近年来,水凝胶在柔性可穿戴传感器领域展现出巨大的应用前景,但是如何通过简单高效的方法构建同时具有优异的拉伸性能、抗冻性能和黏附性能的水凝胶基传感器仍然具有挑战性。文中基于分子间的物理作用,采用简单高效的“一锅法”,以聚N-羟乙基丙烯酰胺(PHEAA)和明胶(GE)作为水凝胶的基体材料,通过向凝胶前驱体溶液中加入氯化钠(NaCl)和乙二醇(EG)制备了PHEAA-GE-EG-NaCl水凝胶。利用万能拉力机、红外光谱仪、差示扫描量热仪、旋转流变仪和电化学工作站对水凝胶进行了结构和性能的表征。结果表明,PHEAA-GE-EG-NaCl水凝胶的拉伸应变为1567%,并具有优异的抗冻性能;PHEAA-GE-EG-NaCl 水凝胶在-30 ℃的拉伸应变和电导率分别高达558%和0.21 S/m;同时,PHEAA-GE-EG-NaCl水凝胶对不同的基材都展现出优异的黏附性能;更为重要的是,PHEAA-GE-EG-NaCl水凝胶基应变传感器对大应变和小应变都具有优异的循环稳定性,能够在较宽的温度范围内(-30~25 ℃)稳定地检测人体大幅度的肢体运动和小幅度的生理信号。因此,PHEAA-GE-EG-NaCl水凝胶在柔性可穿戴传感器领域具有广阔的应用前景。

    Abstract:

    Recently, hydrogel has shown great application prospects in the field of flexible wearable sensor, but the simultaneous realization of remarkable tensile, anti- freezing and adhesion features via a facile method remains challenging. In this work, based on intermolecular physical interactions, poly(N-hydroxyethyl acrylamide) (PHEAA) and gelatin (GE) were employed to prepare PHEAA-GE-EG-NaCl hydrogel by adding sodium chloride (NaCl) and ethylene glycol (EG) into the gel precursor solution via a facile “one- pot” method. The universal tensile machine (UTA), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), rotational rheometer (DHR) and electrochemical workstation were used to characterize the structure and properties of hydrogels. The results show the tensile strain of PHEAA-GE- EG- NaCl hydrogel is 1567%. The PHEAA-GE- EG- NaCl hydrogel possesses outstanding anti- freezing capability, it can maintain the excellent stretchability (558%) and conductivity (0.21 S/m) at -30 ℃. Meanwhile, PHEAA-GE-EG-NaCl hydrogel exhibits the excellent adhesion property to different substrates. More importantly, the PHEAA- GE- EG- NaCl hydrogel- based strain sensor has the excellent strain sensitivity and cyclic stability for both large strain and small strain, and it is capable of stably detecting and monitoring both large-scale human motions and subtle physiological signals in a wide temperature range (-30~25 ℃). Therefore, the PHEAA-GE-EG-NaCl hydrogel holds promising potentials as wearable sensor.

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姜 旻,郝雪芳,叶 磊,罗水源,冀 峰.聚N-羟乙基丙烯酰胺-明胶基水凝胶传感器的制备及性能[J].高分子材料科学与工程,2022,38(7):149-158.

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  • 在线发布日期: 2022-09-26
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