Pore-Refined Biobased Aerogel for Gas-Sensitive Intelligent Colorimetric Tags

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-09-23 DOI:10.1021/acsmaterialslett.4c0186810.1021/acsmaterialslett.4c01868

Xiaosen Pan, Wanlong Song, Huanyu Qian, Guohua Zhang, Ruiming Liu, Xiaojuan Wang*, Fengbao Chen*, Meng Gao* and Zhengjian Zhang,

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Abstract

Biobased materials with superior porosity are the preferred choice for high-performance and environmentally friendly gas sensors. Here, a pore-refined colorimetric aerogel with significant-improved porous structure and mechanical integrity is developed through the strategic incorporation of hydrophilic poly(vinyl alcohol) (PVA) in nanocellulose, evidenced by a 14.35-fold increase in surface area, a 21.24-fold improvement in pore volume, and a 16.91-fold rise in gas adsorption–desorption capacity, along with advancements in both static (5.20-fold) and dynamic (5.59-fold) compressive strengths. The enhancement in performance is attributed to the addition of PVA, which promotes uniformity in the gel network and forms hydrogen bonds with cellulose, thereby minimizing structural changes during drying and refining of the pore structure. The aerogels demonstrate sensitive, gradient, recognizable, and highly reversible color changes to ammonia stimuli (down to 10 ppm). Intelligent tags based on the enhanced aerogels demonstrate earlier identification of spoilage in monitoring different types of meat, proving their potential in smart packaging.

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用于气敏智能比色标签的细孔生物气凝胶

具有优异孔隙率的生物基材料是高性能环保型气体传感器的首选。在这里，通过在纳米纤维素中战略性地加入亲水性聚乙烯醇（PVA），开发出了一种孔隙改良型比色气凝胶，其多孔结构和机械完整性得到了显著改善，具体表现为表面积增加了 14.35 倍，孔隙体积增加了 21.24 倍，气体吸附-解吸能力提高了 16.91 倍，同时静态（5.20 倍）和动态（5.59 倍）抗压强度也得到了提高。性能的提高归功于 PVA 的添加，它促进了凝胶网络的均匀性，并与纤维素形成氢键，从而最大限度地减少了干燥和细化孔隙结构过程中的结构变化。气凝胶对氨刺激（低至 10 ppm）表现出灵敏、渐变、可识别和高度可逆的颜色变化。基于增强型气凝胶的智能标签在监测不同类型的肉类时能更早地识别变质情况，证明了其在智能包装方面的潜力。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.