Research progress in preparation and application of nanocellulose-based sensors
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摘要: 可再生纳米纤维素近年来备受关注,纳米纤维素的优势在于来源广泛、制备方法多样、可生物降解、安全无毒、高比表面积、较高强度、较低密度和良好的热稳定性等。本论文主要针对纳米纤维素的制备方法、基于纳米纤维素制备的2D膜材料传感器与3D凝胶材料传感器的应用研究进展进行分析,重点介绍了纳米纤维素基传感器在接近传感、pH传感、电化学传感、葡萄糖传感以及离子传感检测等方面的应用。研究结果表明,纳米纤维素基传感器在灵敏度、力学性能、稳定性、特异性和环境友好性等方面优于一些传统材料制备的传感器,纳米纤维素基传感器具有广阔的潜在应用前景。Abstract: Renewable nanocellulose has attracted much attention in recent years. The advantages of nanocellulose include wide sources, diverse preparation methods, biodegradability, safe and non-toxic, high specific surface area, high strength, low density and good thermal stability. The preparation methods of nanocellulose, and the application research progress of 2D membrane material sensors and 3D gel material sensors based on nanocellulosic materials are mainly introduced. The applications of nanocellulose-based sensors in proximity sensing, pH sensing, electrochemical sensing, glucose sensing and ion sensing detection are highlighted. The results show that the sensitivity, mechanical properties, stability, specificity and environmental friendliness of nanocellulose based sensors are better than those prepared by some traditional materials. Nanocellulose based sensors have broad potential applications.
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Key words:
- nanocellulose /
- preparation /
- sensor /
- application /
- detection
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图 1 自支撑纤维素纳米纤丝(CNF) 薄膜及显示其弯曲强度的照片(a), 侧面示意图((b), (c))和组装传感器的照片(d)[30] (经许可转载)
Figure 1. Pictures of a fabricated self-standing cellulose nanofibril (CNF) film and its bending strength (a), schematic side view ((b), (c)) and a picture of assembled sensor (d)[30] (Reprinted with permission)
PET—Polyethylene terephthalate
图 3 导电聚 3, 4-乙烯二氧噻吩/聚苯乙烯磺酸/纤维素纳米纤丝(PEDOT/PSS/CNF)气凝胶[45]:(a) PEDOT/PSS中CNF表面羧酸盐的质子化及其与PSS的氢键作用; (b)质子化、冷冻/冻干和乙二醇(EG)蒸汽退火工艺示意图;(c) CNF气凝胶和PEDOT/PSS/CNF气凝胶在加州罂粟上面的图片和不同直径的圆柱形PEDOT/PSS/CNF气凝胶的照片 (经许可转载)
Figure 3. Conductive poly(3, 4-ethylenedioxythiophene)/poly(styrene sulfonate)/cellulose nanofibrils (PEDOT/PSS/CNF) aerogels[45]: (a) Protonation of CNF surface carboxylates and their hydrogen bonding with PSS in PEDOT/PSS; (b) Process schematic of protonation, freezing/lyophilization, and ethylene glycol (EG) vapor annealing processes; (c) Pictures of CNF and PEDOT/PSS/CNF aerogels on top of California poppy and cylindrical PEDOT/PSS/CNF aerogels in different diameters (Reprinted with permission)
图 4 纤维素纳米片增强的柔性多键交联聚丙烯酸水凝胶(Celn/PAA-Fem3+)的制备及其网络结构图解[53] (经许可转载)
Figure 4. Preparation of cellulose nanosheet enhanced flexible multibond cross-linked poly(acrylic acid) hydrogel (Celn/PAA-Fem3+) and their network structure diagram[53] (Reprinted with permission)
AA—Acrylic acid; MBA—N, N′-Methylenebisacrylamide; CNS—Cellulose nanosheet; PAA—Poly(acrylic acid)
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