增强和增韧聚乙烯醇的有机-无机网络的仿生构建，提高了聚乙烯醇的紫外线屏蔽和热性能

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-07-30 DOI:10.1016/j.coco.2025.102549

Bangchao Zhong , Sha Yao , Jiaojiao Jiang , Qiaoyu He , Jianlin Li

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引用次数: 0

摘要

制备具有高强度和韧性的可生物降解高级高分子复合材料仍然是一个重大挑战。在这项工作中，受蜘蛛丝的智能结构的启发，通过仿生策略设计了一种可生物降解的高级聚乙烯醇（PVA）纳米复合材料，该复合材料采用单宁酸（TA）接枝二氧化硅（SiO2）作为纳米填充剂支撑的交联剂（SiO2-s- tas）。与PVA/SiO2复合材料相比，制备的PVA/SiO2-s- tas纳米复合材料的拉伸强度和断裂应变同时提高，拉伸韧性从58.6 MJ/m3提高到74.2 MJ/m3。PVA/SiO2-s-TAS纳米复合材料具有较高的强度和韧性，这主要是由于SiO2-s-TAS纳米颗粒周围的纳米约束效应以及PVA链和SiO2-s-TAS通过氢键构建的有机-无机动态网络。此外，PVA/SiO2-s-TAS纳米复合材料具有较好的热稳定性、耐老化性能和紫外线屏蔽性能。因此，本研究为先进PVA复合材料的制备提供了一种有前景的策略，在生物医学工程和先进包装领域显示出巨大的潜力。

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Bioinspired construction of organic-inorganic network for strengthening and toughening Poly(vinyl alcohol) with improved UV shielding and thermal performances

The preparation of biodegradable advanced polymer composite materials with combination of strength and toughness remains a significant challenge. In this work, inspired by the smart structure of spider silk, a biodegradable advanced poly(vinyl alcohol) (PVA) nanocomposite was designed via a biomimetic strategy using tannic acid (TA) grafted silica (SiO₂) as a nanofiller-supported crosslinker (SiO₂-s-TAS). The prepared PVA/SiO₂-s-TAS nanocomposite exhibited simultaneously improved tensile strength and breaking strain, along with an increase in tensile toughness from 58.6 to 74.2 MJ/m³ compared to the PVA/SiO₂ composite. The integration of high strength and good toughness in the PVA/SiO₂-s-TAS nanocomposite was attributed to the nano-confinement effect around the SiO₂-s-TAS nanoparticles and organic-inorganic dynamic network constructed by the PVA chains and SiO₂-s-TAS via hydrogen bonds. Furthermore, the PVA/SiO₂-s-TAS nanocomposite showed improved thermal stability, aging resistance and ultraviolet shielding performance. Therefore, this work offers a promising strategy for the preparation of advanced PVA composites, showing significant potential in biomedical engineering and advanced packaging fields.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.