具有强阻燃和早期火灾预警性能的全生物质气凝胶材料

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-08-30 DOI:10.1016/j.polymdegradstab.2025.111637

Chang Wang , Min Hu , Yanji Wu , Haiyun Ma , Jianzhong Xu

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引用次数: 0

摘要

近年来，生物质纤维素气凝胶因其可再生和可持续性而受到广泛关注。本文介绍了一种具有优异阻燃和火灾报警性能的全生物质纤维气凝胶。在预处理过程中，纤维素和木质素均得到有效保存，最大限度地提高了生物质tof的利用率。然后将tof与生物质阻燃剂植酸铵交联。所得的TOFs基气凝胶具有低密度（48 mg/cm3）和优异的保温性能。同时，还实现了强大的阻燃性，其UL-94等级轻松达到V-0级，极限氧指数（LOI）高达78%。此外，基于燃烧过程中稳定的磷掺杂炭结构，TOFs基气凝胶也表现出火灾预警性能。它可以对火焰做出快速反应，并持续触发警报长达1.5小时。此外，所得到的基于tof的气凝胶在火灾预警中表现出优异的可重复使用性，可达30次。目前的全生物质气凝胶不仅具有火灾预警能力，还有助于抑制火焰的蔓延，从而提高整体安全性。

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Typha orientalis fibers based full biomass aerogel with robust flame retardancy and early fire warning

Biomass-derived cellulose aerogels have garnered significant attention in recent years due to their renewability and sustainability. Here, we introduce a completely biomass typha orientalis fibers (TOFs) based aerogel which possesses excellent flame retardancy and fire warning performance. Both cellulose and lignin were effectively preserved to maximize the utilization of the biomass TOFs during the pretreatment. The TOFs were then crosslinked with the biomass flame retardant ammonium phytate. The resulting TOFs based aerogel possesses a low density (48 mg/cm³) and excellent thermal insulation properties. Meanwhile, robust flame retardancy was also achieved, its UL-94 rating easily reaches V-0 grade, with a limiting oxygen index (LOI) as high as 78 %. In addition, based on the stable phosphorus doping char structure during combustion, the TOFs based aerogel also shows fire warning performance. It can respond quickly upon flame and continue to trigger alarm for up to 1.5 h. Moreover, the resulting TOFs based aerogel demonstrates excellent reusability in fire early warning up to 30 times. The present full biomass-based aerogel not only provide a fire warning capability but also contribute to the suppression of flame spread, thereby enhancing the overall safety.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.