高强度纤维素双网络导电水凝胶制备及其应变感应特性研究

doi:10.3969/j.issn.0253-2417.2023.03.004

林产化学与工业 ›› 2023, Vol. 43 ›› Issue (3): 25-33.doi: 10.3969/j.issn.0253-2417.2023.03.004

高强度纤维素双网络导电水凝胶制备及其应变感应特性研究

蹇均宇¹^,², 谢宜彤¹^,², 高士帅¹^,², 张代晖¹^,²^,*(), 储富祥¹^,²

1. 中国林业科学研究院林产化学工业研究所; 江苏省生物质能源与材料重点实验室; 国家林业和草原局林产化学工程重点实验室; 林木生物质低碳高效利用国家工程研究中心, 江苏南京 210042
2. 南京林业大学江苏省林业资源高效加工利用协同创新中心, 江苏南京 210037

收稿日期:2022-03-18 出版日期:2023-06-28 发布日期:2023-06-27
通讯作者: 张代晖 E-mail:zdh0824@163.com
作者简介:张代晖, 副研究员, 硕士生导师, 主要从事生物基新材料研究; E-mail: zdh0824@163.com
蹇均宇(1996-), 女, 重庆人, 硕士生, 从事生物基高分子材料方面研究
基金资助:
中央级公益性科研院所基本科研业务费专项资金(CAFYBB2021QB004)

Preparation and Strain Induction Characterization of High Strength Cellulose Dual-network Conductive Hydrogel

Junyu JIAN¹^,², Yitong XIE¹^,², Shishuai GAO¹^,², Daihui ZHANG¹^,²^,*(), Fuxiang CHU¹^,²

1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing 210042, China
2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China

Received:2022-03-18 Online:2023-06-28 Published:2023-06-27
Contact: Daihui ZHANG E-mail:zdh0824@163.com

摘要/Abstract

摘要：

将微晶纤维素(MCC)-氢氧化钠/尿素溶液通过乙醇蒸气诱导形成纤维素一级网络，以丙烯酸(AA)和丙烯酰胺(AM)为原料，N, N′-亚甲基双丙烯酰胺(MBAA)为交联剂，过硫酸铵(APS)为引发剂构建二级网络，随后采用浸泡法引入氯化铁，构筑了多交联的纤维素/聚丙烯酰胺-聚丙烯酸/铁离子(C/PAMAA/Fe³⁺)水凝胶，并对水凝胶的力学性能及电化学性能进行了探究。研究结果表明：Fe³⁺与—COO^-形成的配位键在形变时作为牺牲键断裂，这有助于C/PAMAA/Fe³⁺机械性能的提升，水凝胶的韧性和抗拉强度分别达到17.13 MJ/m³和4.59 MPa。循环拉伸测试的结果显示：随着Fe³⁺浓度的增加，C/PAMAA/Fe³⁺水凝胶的能量耗散效率增加，从56.86%增加到75.17%，且第二次循环后弹性恢复率接近85.0%。随着Fe³⁺用量的增加，离子电导率增大，Fe³⁺浓度为0.2 mol/L的C/PAMAA/Fe³⁺水凝胶电导率为1.03 S/m。将C/PAMAA/Fe³⁺水凝胶组装为应变感应器，感应器的灵敏度为4.0，其拉伸递增和拉伸循环的电阻变化结果表明该应变感应器具有较好的稳定性；实时监测关节活动的结果表明该感应器具有稳定的应变响应性。

关键词: 离子配位, 纤维素水凝胶, 双网络, 应变感应器

Abstract:

The primary network was formed by using ethanol vapor to induce the microcrystalline cellulose(MCC)-sodium hydroxide/urea solution. The acrylic acid(AA) and acrylamide(AM) were chosen as raw materials, together with N, N′-methylene bisacrylamide(MBAA) as a cross-linking agent, and ammonium persulfate(APS) as an initiator to fabricate the secondary network. Then, ferric chloride was introduced by soaking method to construct a multi-crosslinked cellulose/polyacrylamide-polyacrylic acid/ iron ion hydrogel(C/PAMAA/Fe³⁺). The mechanical and electrochemical properties of the hydrogel were investigated. The results showed that the coordination bond formed by Fe³⁺ and —COO^- acted as a sacrificial fracture during deformation, which contributed to the improvement of the mechanical properties of C/PAMAA/Fe³⁺. The hydrogel showed the toughness of 17.13 MJ/m³ and tensile strength of 4.59 MPa, respectively. Moreover, the results of the cyclic tensile loading-unloading test showed that the energy dissipation efficiency of the C/PAMAA/Fe³⁺ hydrogel increased with the increase of Fe³⁺ concentration, and the energy dissipation rate increased from 56.86% to 75.17%. Besides, the elastic recovery after the second cyclic loading-unloading could reach around 85.0%. As the increasing concentration of Fe³⁺, the ionic conductivity of the C/PAMAA/Fe³⁺ hydrogel increased, and a Fe³⁺ concentration of 0.2 mol/L was 1.03 S/m. The C/PAMAA/Fe³⁺ hydrogel was assembled as a strain sensor, and the sensitivity was 4.0. The resistance change results of the stretching increment and stretching cycle showed that the C/PAMAA/Fe³⁺ hydrogel strain sensor had good stability. The results of real-time monitoring of joint activities showed that the sensor had a stable strain response.

Key words: ion coordination, cellulose hydrogel, dual-network, strain sensor

中图分类号:

TQ35

蹇均宇, 谢宜彤, 高士帅, 张代晖, 储富祥. 高强度纤维素双网络导电水凝胶制备及其应变感应特性研究[J]. 林产化学与工业, 2023, 43(3): 25-33.

Junyu JIAN, Yitong XIE, Shishuai GAO, Daihui ZHANG, Fuxiang CHU. Preparation and Strain Induction Characterization of High Strength Cellulose Dual-network Conductive Hydrogel[J]. Chemistry and Industry of Forest Products, 2023, 43(3): 25-33.

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Fe³⁺/(mol·L^-1)	能量耗散/(MJ·m^-3)energy dissipation	韧性/(MJ·m^-3)toughness	能量耗散率/%energy dissipation rate
0.01	0.29	0.51	56.86
0.03	1.21	1.83	66.12
0.10	2.27	3.02	75.17

样品sample	韧性tenacity	参考文献ref.	样品sample	韧性tenacity	参考文献ref.
C/PAMAA/Fe³⁺-48 h	15.96	本研究this study	AMD-QCS^△	2.00	[14]
CBH^△	4.30	[4]	Cel₁₄/PAA-Fe_2.50³⁺^△	0.94	[15]
CMC-Fe³⁺/PAAm^△	6.52	[8]	PVA/PAANa(5)-Tb³⁺(0.5)*	0.93	[16]
PAM/CMC-Fe³⁺^△	5.23	[10]	κ-CG-K⁺/pHEAA*	11.90	[17]
poly(AA-co-SMA)/c-CNF/Fe³⁺^△	0.60	[11]	PAA-g-QCE1.5%/PVA8%*	2.60	[18]
PAA-CMC-Al³⁺^△	1.57	[12]	PAM-CS-A*	5.00	[19]
PAA/CMC_1.0-Fe³⁺-S^△	12.06	[13]	PAAm/PVA/CS/FeCl₃*	0.11	[20]

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高强度纤维素双网络导电水凝胶制备及其应变感应特性研究

Preparation and Strain Induction Characterization of High Strength Cellulose Dual-network Conductive Hydrogel

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