Effect of hydrophobic modification and dosage of long afterglow phosphors on the properties of self-luminescent cement-based materials

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2024-07-14 DOI:10.1016/j.dibe.2024.100505

Yajun Lv , Caihong Song , Tengfei Xiang , Juntao Dang , Binbin Dong , Weizhun Jin , Kangjie Zhang

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引用次数: 0

Abstract

Both the hydrolysis instability of original long afterglow phosphors (OLP) and limited amount of reflective powders (RP) degraded the luminescent performance of self-luminescent cement-based materials (SLCM). This study novelty proposed a solution by coating organosilicon layer on the OLP surface to create hydrophobic effect for enhancing its water resistance. Furthermore, compared with typical SLCM with low content of LP and RP, SLCM mixtures were prepared through replacing cement by LP and containing higher volume of RP according to the modified Andreasen and Andersen (A&A) model. The effects of dosage and surface modification of LP on the strength, hydration kinetics, luminescent performance, phase composition and microstructure of SLCM were examined. Hydrophobic LP (HLP) achieved similar crystal structure but changed its surface morphology as well as enhanced its water resistance. Introduction of the OLP into SLCM was liable to generate the hydrolysis products. HLP performed better in generating more hydration products but less hydrolysis products, thus formed a compact microstructure and enhanced the thermal stability. Hydration kinetics revealed that the hydrolysis reaction of OLP decreased the heat of hydration, while the hydration process was promoted by HLP. Higher dosage of LP after hydrophobic modification in SLCM helped in obtaining a better luminescent performance but caused a drastic reduction in strength. Overall, the optimal dosage of HLP in SLCM including higher volume of RP was more effective in achieving a superior luminescent performance without degrading the strength.

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疏水改性和长余辉荧光粉用量对水泥基自发光材料性能的影响

原始长余辉荧光粉（OLP）的水解不稳定性和反射粉（RP）的有限用量都降低了自发光水泥基材料（SLCM）的发光性能。本研究新颖地提出了一种解决方案，即在 OLP 表面涂覆有机硅层，以产生疏水效果，从而增强其防水性。此外，与 LP 和 RP 含量较低的典型 SLCM 相比，根据改进的 Andreasen 和 Andersen（A&A）模型，通过用 LP 取代水泥并添加较多 RP 来制备 SLCM 混合物。研究了 LP 的用量和表面改性对 SLCM 的强度、水化动力学、发光性能、相组成和微观结构的影响。疏水性 LP（HLP）实现了相似的晶体结构，但改变了其表面形态并增强了其耐水性。在 SLCM 中引入 OLP 容易产生水解产物。HLP 在生成更多水合产物而较少水解产物方面表现更佳，因此形成了紧凑的微观结构，并增强了热稳定性。水合动力学表明，OLP 的水解反应降低了水合热，而 HLP 则促进了水合过程。在 SLCM 中进行疏水改性后，增加 LP 的用量有助于获得更好的发光性能，但会导致强度急剧下降。总之，SLCM 中 HLP 的最佳用量（包括较高体积的 RP）能更有效地实现优异的发光性能，同时不会降低强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.