金纳米棒通过动态金硫酸酯相互作用交联PNIPAM水凝胶,具有可拉伸、粘接、自愈和光热性能

IF 2.2 4区 工程技术 Q2 Chemistry Gold Bulletin Pub Date : 2021-01-22 DOI:10.1007/s13404-021-00293-6
Shijun Lin, Sirui Jiang, Yuchen Zhang, Zhengwei Dai, Yu Dai, Fan Xia, Xiaojin Zhang
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引用次数: 5

摘要

由于纳米金棒的光热效应,纳米金棒复合水凝胶越来越受到人们的关注。然而,一种简单的策略,避免多步骤的表面改性,以合成AuNR交联剂仍然是一个关键的挑战。以N,N′-双(丙烯酰)半胺(BACA)修饰的aunr为交联剂,通过NIPAM聚合制备了aunr交联PNIPAM水凝胶。BACA在结构中含有一个二硫键。在形成水凝胶之前,直接将AuNR与BACA混合,形成动态可逆的Au-thiolate键,方便地制备了AuNR交联剂。aunr的加入使水凝胶具有光热效应和优异的力学性能。水凝胶可以反复粘附在猪皮、金属、塑料、玻璃表面,附着力相对稳定。受损的水凝胶在2?近红外(NIR)激光(808?300毫瓦/厘米/ 2)辐照。这项工作为PNIPAM水凝胶的改进提供了思路,使其在生物医学上有进一步的应用前景。
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Gold nanorods crosslinking PNIPAM hydrogels via dynamic Au-thiolate interaction with stretchable, adhesive, self-healing, and photothermal properties

Gold nanorod (AuNR) nanocomposite hydrogels have attracted increasing attention due to the photothermal effect of AuNRs. However, a facile strategy that avoids multi-step surface modification for synthesis of AuNR crosslinkers is still a critical challenge. Here, AuNRs crosslinking PNIPAM hydrogels were prepared by polymerization of NIPAM with N,N′-bis(acryloyl)cystamine (BACA)-modified AuNRs as crosslinkers. BACA contains a disulfide bond in the structure. Dynamic and reversible Au-thiolate bonding was formed by directly mixing AuNRs and BACA to facilely prepare AuNR crosslinkers before hydrogel formation. The addition of AuNRs gives hydrogels their photothermal effect and remarkable mechanical behaviors. Hydrogels could repeatedly adhere to the surface of pigskin, metal, plastic, and glass with a relatively stable adhesion. The damaged hydrogels heal within 2?min with near-infrared (NIR) laser (808?nm, 300?mW?cm?2) irradiation. This work provides a line of thinking for improvement of PNIPAM hydrogels, making them promising for further applications in biomedicine.

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来源期刊
Gold Bulletin
Gold Bulletin 工程技术-材料科学:综合
CiteScore
3.30
自引率
4.50%
发文量
0
审稿时长
3 months
期刊介绍: Gold Bulletin is the premier international peer reviewed journal on the latest science, technology and applications of gold. It includes papers on the latest research advances, state-of-the-art reviews, conference reports, book reviews and highlights of patents and scientific literature. Gold Bulletin does not publish manuscripts covering the snthesis of Gold nanoparticles in the presence of plant extracts or other nature-derived extracts. Gold Bulletin has been published over 40 years as a multidisciplinary journal read by chemists, physicists, engineers, metallurgists, materials scientists, biotechnologists, surface scientists, and nanotechnologists amongst others, both within industry and academia. Gold Bulletin is published in Association with the World Gold Council.
期刊最新文献
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