何鑫,胡建全,刘玉新.纤维素纳米纤维基抗冻双网络凝胶的制备及其应变传感性能研究[J].中国造纸,2025,44(10):114-122 本文二维码信息
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纤维素纳米纤维基抗冻双网络凝胶的制备及其应变传感性能研究
Preparation of Cellulose Nanofiber-based Antifreeze Double Network Gel and Its Strain Sensing Properties
收稿日期：2025-03-20  修订日期：2025-04-11
DOI：10.11980/j.issn.0254-508X.2025.10.013
关键词:  纤维素纳米纤维  双网络凝胶  抗冻性能  人体运动监测
Key Words:cellulose nanofibers  double network gel  antifreeze performance  human movement monitoring
基金项目:国家自然科学基金（22068017，22468028）；云南省教育厅可降解塑料工程研究中心（KKPU202205001）；云南省基础研究项目（202301BE070001-034，202401AU070141）。
作者单位邮编
何鑫* 昆明理工大学化学工程学院,云南昆明,650500 650500
胡建全 昆明理工大学化学工程学院,云南昆明,650500 650500
刘玉新* 昆明理工大学化学工程学院,云南昆明,650500
云南省教育厅教学塑料工程研究中心,云南昆明,650000 		650000
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摘要:本研究采用乙二醇（EG）和氯化锌（ZnCl2）制备低共熔溶剂（DES），并代替水作溶剂，以丙烯酰胺（AM）为单体，在紫外光照射下引发聚合制得聚丙烯酰胺（PAM），引入纤维素纳米纤维（CNF）和聚乙烯醇（PVA）以增强力学性能，最终制得DES-PVA/PAM/CNF双网络抗冻凝胶。结果表明，当ZnCl2与EG的物质的量比为1∶5时，所制DES-PVA/PAM/CNF抗冻双网络凝胶表现出最佳的抗冻性能，冰点低至-73.03 ℃。进一步探究CNF含量对凝胶性能的影响，当CNF含量为0.4%（以EG质量计）时，凝胶的综合性能最优。在常温条件下，该凝胶的断裂强度可达0.94 MPa，断裂伸长率为844.5%；而在低温环境下，其断裂强度仍能保持在0.92 MPa，具有优异的低温适应性。此外，将该凝胶组装为应变传感器后，成功实现了对人体皮肤贴附式运动的监测。
Abstract:In this study， a deep eutectic solvent (DES) was prepared by ethylene glycol (EG) and zinc chloride (ZnCl₂), and it was used as solvent replacing water. Acrylamide (AM) was used as a monomer， and polyacrylamide (PAM) was polymerized under UV irradiation. Then， the cellulose nanofiber (CNF) and polyvinyl alcohol (PVA) were introduced to enhance mechanical properties， resulting in a DES-PVA/PAM/CNF antifreeze double network gel. The results showed that the prepared DES-PVA/PAM/CNF antifreeze double network gels exhibited the best antifreeze performance with freezing point as low as -73.03 ℃ when the molar ratio of ZnCl2 to EG was 1∶5. Further investigation of the effects of CNF content on the gel properties revealed that the best overall performances were achieved when the CNF content was 0.4% (based on the mass of EG). At normal temperature， the fracture strength of the gel was up to 0.94 MPa， and the strain at break was 844.5%， at low temperature， the fracture strength was still maintained at 0.92 MPa， exhibiting excellent adaptability at low temperatures. In addition， after assembling the gel as a strain sensor， the monitoring of human skin-attached motion was successfully realized.
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