Constructing Dynamic Macropores in Thermo‐Responsive Hydrogel Actuator for Large‐Deformable Gripper DOI Open Access
Huanhuan Lu, Xin Wen, Baoyi Wu

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

Abstract Poly( N ‐isopropyl acrylamide) (PNIPAm)‐based smart hydrogels are widely employed in emerging applications such as drug delivery and tissue engineering, because their lower critical solution temperature (LCST) is close to physiological conditions. However, the dense chain collapse during thermo‐responsive phase transition restricts water diffusion, resulting limited volumetric change. Here, a pure PNIPAm hydrogel that achieves large‐scale volume by incorporating microgels, presented. During its shrinkage, microgels contract 10% of original volume, generating open macropores serve efficient channels, thereby facilitating change bulk. In contrast conventional with static porous structures, these dynamic disappear when return initial state at temperatures, preserving mechanical integrity entire hydrogel. This enhanced deformability enables bilayer actuator achieve bending angles exceeding 1150°, sixfold increase over traditional PNIPAm‐based actuators, allowing it function an intelligent gripper capable capturing small, mobile organisms. approach, which addresses inherent challenge achieving bulk hydrogels, distinct from existing strategies.

Language: Английский

Preparation of Gradient HEA‐DAC/HPA Hydrogels by Limited Domain Swelling Method DOI
Shiyu Dong,

Guoqiang Lu,

Guohua Wang

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Hydrogels are widely used in biological dressing, tissue scaffolding, drug delivery, sensors, and other promising applications owing to their water‐rich soft structures, biocompatibility, adjustable mechanical properties. However, most of the conventional hydrogels isotropic. The anisotropic structures existed organizational structure plants animals, which played a crucial role systems. In this work, method limited domain swelling prepare is proposed. Through spatially controlled swelling, extension direction can be by tailored mold, further achieving with concentration gradients. external solution serves as promote hydrogel matrix mold control direction. Due diversity solutions, applied variety stimulus‐responsive polymers. for construction different

Language: Английский

Citations

1
Constructing Dynamic Macropores in Thermo‐Responsive Hydrogel Actuator for Large‐Deformable Gripper DOI Open Access
Huanhuan Lu, Xin Wen, Baoyi Wu

et al.

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 20, 2024

Abstract Poly( N ‐isopropyl acrylamide) (PNIPAm)‐based smart hydrogels are widely employed in emerging applications such as drug delivery and tissue engineering, because their lower critical solution temperature (LCST) is close to physiological conditions. However, the dense chain collapse during thermo‐responsive phase transition restricts water diffusion, resulting limited volumetric change. Here, a pure PNIPAm hydrogel that achieves large‐scale volume by incorporating microgels, presented. During its shrinkage, microgels contract 10% of original volume, generating open macropores serve efficient channels, thereby facilitating change bulk. In contrast conventional with static porous structures, these dynamic disappear when return initial state at temperatures, preserving mechanical integrity entire hydrogel. This enhanced deformability enables bilayer actuator achieve bending angles exceeding 1150°, sixfold increase over traditional PNIPAm‐based actuators, allowing it function an intelligent gripper capable capturing small, mobile organisms. approach, which addresses inherent challenge achieving bulk hydrogels, distinct from existing strategies.

Language: Английский

Citations

0