Zhang, X. Y.; Deng, S. H.; Cai, C. M.; Li, J. C.; Lei, C. H.; Chen, A. F.; Gao, Y. F. Preparation and viscoelastic behavior of hydrogel composites. Acta Polymerica Sinica, 2025, 56(7), 1215-1222
Zhang, X. Y.; Deng, S. H.; Cai, C. M.; Li, J. C.; Lei, C. H.; Chen, A. F.; Gao, Y. F. Preparation and viscoelastic behavior of hydrogel composites. Acta Polymerica Sinica, 2025, 56(7), 1215-1222 DOI: 10.11777/j.issn1000-3304.2025.25016. CSTR: 32057.14.GFZXB.2025.7375.
Preparation and Viscoelastic Behavior of Hydrogel Composites
As high-water absorption and high-water retention polymers
hydrogels are widely used in many fields such as smart materials
water absorption materials
drug delivery
slow release
skin dressings
and biomedicine. However
the traditional hydrogels like polyacrylamide (PAAm) have the limitation of low mechanical strength and poor stability
which greatly limits the development of hydrogels. The commonly used methods for increasing the strength of hydrogels include the construction of double-network structure hydrogels
the introduction of chemical groups to modify hydrogels
the introduction of nanoparticles to form nanocomposite hydrogels
and so on. In this work
the mechanical properties of PAAm hydrogels are mainly improved by introducing hydrophilic silica (SiO
2
) nanoparticles. The results show that SiO
2
nanoparticles
as multi-functional crosslinking agents
are physically adsorbed or chemically bonded into the hydrogel matrix to enhance the 3D network structure of the hydrogel. In addition
hydrogen bon
ds formed between the silicon hydroxyl group on the surface of SiO
2
nanoparticles and the amide group on the polymer chain
which increases the crosslinking density of the hydrogel and greatly improves the compression performance. The SiO
2
nanoparticles are hydrophilic
which will increase the water absorption of the composite hydrogel and increase the swelling rate
but the swelling rate will decrease due to the limitation of the three-dimensional mesh of the hydrogel. The energy storage modulus of composite hydrogels will gradually increase due to the denser three-dimensional mesh structure
but the loss modulus will increase due to the increase of internal structure friction
but also because of the denser mesh
the increase of loss modulus will be limited. In general
the addition of SiO
2
nanoparticles has a certain significance for improving the viscoelasticity of hydrogels.
关键词
Keywords
references
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Related Author
Xiao-yu Zhang
Shu-hua Deng
Chang-min Cai
Jin-cheng Li
Cai-hong Lei
Yi-fang Gao
An-fu Chen
Shu-guang Yang
Related Institution
广东水利电力职业技术学院
广东工业大学材料与能源学院
State Key Laboratory of Advanced Fiber Materials, Center for Advanced Low-dimension Materials, College of Material Science and Engineering, Donghua University
College of Materials Science & Engineering
Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University