繁体中文

Photonic hydrogel of high solid cellulose with reconfigurability

545
2025-02-17 14:33:51
查看翻譯

Recently, Qing Guangyan, a researcher team from the Research Group on Bioseparation and Interface Molecular Mechanism (1824 Group) of Biotechnology Research Department of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, designed and prepared a highly solid cellulose photonic hydrogel with reconfigurability and mechanical discoloration. This preparation method opens up a new way to manufacture solid photonic hydrogels, and its intelligent optical response characteristics are expected to expand the application of bionic photonic cellulose materials in medical, energy and industrial fields.

The structure of Bouligand, which mimics the natural world, exhibits excellent mechanical properties due to its interlayer coupling and stress transfer mechanism, inspiring the development of high-performance materials such as impact resistant bioplastics, ceramic protective clothing, and biomimetic alloy composites. Although significant progress has been made in engineering plasticity through molecular level design and multi-scale structural optimization of biomimetic Bouligand structures, most existing materials are composed of single scale brittle units, lacking graded active interfaces and autonomous response capabilities, resulting in limited ductility and functionality. Therefore, it is necessary to break through the existing design bottlenecks and develop a new Bouligand structural material system that simultaneously possesses multi-level active interfaces, dynamic response capabilities, and high toughness, in order to enhance and optimize the rigidity and ductility of the material. Building strategies that balance micro motion and structural robustness, fundamentally breaking the contradiction between brittleness and toughness, and overcoming key technical challenges that hinder the practical application of biomimetic materials, is expected to solve the above-mentioned problems.

 



In this work, the team provided a widely applicable solution for the Bouligand structure through self-assembly of cellulose nanocrystals (CNC). This strategy achieves precise control of the spatial arrangement of the network matrix through nanofiber sliding and hydrogen bonding reconstruction. This transition is driven by the hydrogen bond action activated by water molecules to form a solid photonic hydrogel. The obtained Bouligand structure hydrogel shows excellent mechanical properties. Compared with the initial hydrogel, its toughness value has increased by 5 times, reaching 155.5MJ/m&# 179;, Stretchability exceeds 950%. In addition, these photonic hydrogels exhibit dynamic color change ability, can switch between red and blue, and maintain stable electrical sensitivity during reversible stretching. The imaging interface of the photonic hydrogel is durable and can be used repeatedly. It only needs to soak in water for 5 minutes to restore its activity. This work has opened up a new path for the practical application of CNC, which is expected to be applied in fields such as sustainable bioplastics, flexible electronic substrates, and intelligent photonic devices.

In recent years, the team led by Qing Guangyan has made a series of progress in the chiral functionalization research of nanocellulose. In the early stage, they have developed multi-mode and convertible chiral optical anti-counterfeiting films (Adv. Funct. Mater., 2022), flexible sweat sensors based on photonic cellulose nanocrystals (Small, 2023), left-handed circularly polarized luminescent cellulose films (Adv. Mater., 2024), and synergistic color changing and conductive cellulose nanocrystal photonic patches (Mater. Horizon., 2024).

The related research findings, titled "Highly robust cellulose photonic hydrogels with reconfigurability and mechanochromism," were recently published in Materials Today. The first author of this work is Li Qiongya, a doctoral student from the 1824 group of the institute.

Source: opticsky

相關推薦
  • Chinese researchers have developed for the first time a room temperature HoYLF thin film laser

    In a study published in Optics Express, the research team led by Professor Fu Yuxi of the Xi'an Institute of Optics and Precision Mechanics (XIOPM) of the Chinese Academy of Sciences developed the room temperature holmium doped lithium yttrium fluoride (Ho: YLF) composite thin slice laser for the first time, which can achieve high efficiency and high-quality CW laser output.Laser devices operating...

    02-21
    查看翻譯
  • The world's highest power industrial grade fiber laser is released in Tianjin

    On August 31st, Tianjin Kaipulin Optoelectronics Technology Co., Ltd. (hereinafter referred to as Kaipulin), a Tianjin Port Free Trade Zone enterprise, officially released the world's first 200000 watt ultra-high power industrial grade fiber laser, breaking the record for the highest power of industrial grade fiber lasers in the world and marking China's stable position in the international advanc...

    2024-09-02
    查看翻譯
  • Lumibird, a well-known French optoelectronics company, increased its lidar production capacity by 16% year-on-year and was boosted by strong market demand

    On July 24, Lumibird, a well-known French optoelectronics company, released its latest semi-annual report. In the first half of the year, Lumibird's revenues were 97.2 million euros, up 16 percent from the same period last year. Of this, the Optoelectronics division contributed 45.9 million euros and the remaining 51.3 million euros came from its medical division. In the second quarter (Q2) ended ...

    2023-08-04
    查看翻譯
  • Focused Energy purchases two world-class high-energy lasers

    Recently, Focused Energy, a well-known foreign fusion energy startup, announced that it has officially signed an agreement to purchase two of the world's top high-energy lasers. These two large lasers will be deployed in the company's upcoming factory in the San Francisco Bay Area in the next two years.Scott Mercer, CEO of Focused Energy, stated, "These lasers are currently the highest average pow...

    2024-12-25
    查看翻譯
  • Amazon's Kuiper Program Successfully Tested Satellite Space Laser

    SpaceX and its billionaire CEO Elon Musk may finally have reason to look back in the satellite internet competition. On Thursday, Amazon revealed that it had successfully used a space laser technology called "Optical Intersatellite Link" to transmit connections between two Kuiper Program satellites in low Earth orbit, located 621 miles apart, at a speed of 100 gigabits per second. This is approxim...

    2023-12-18
    查看翻譯