Synergistic optimization of plant-based natural insulation materials with starch and waste-expanded polystyrene composite binders: Advancing thermo-acoustic efficiency for sustainable building envelopes

IF 6.6 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Energy and Buildings Pub Date : 2025-05-08 DOI:10.1016/j.enbuild.2025.115834

Fatima Mouguen , Mouatassim Charai , Said Oubaha , Mohamed Oualid Mghazli , Ahmed Mezrhab , Yassine Taha , Mostafa Benzazoua

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Abstract

Developing sustainable binders and recycling waste materials are key to achieving carbon–neutral building materials. This study optimizes a composite binder using waste-expanded polystyrene (EPS) and cornstarch for bio-based insulation, enhancing thermal and acoustic performance while improving resource efficiency. A Doehlert experimental design optimized the fiber-to-binder (F/B) ratio (40–100 %) and EPS-to-starch (E/S) ratio (0–100 %), also assessing fiber length (short vs. long). For short fibers, the optimal formulation (F/B = 96.74 %, E/S = 27.34 %) achieved a density of 210.9 kg/m³ and thermal conductivity of 0.087 W/m·K. Long fibers (F/B = 89.72 %, E/S = 50 %) resulted in 144.2 kg/m³ and 0.068 W/m·K, meeting DIN 4108–2 standards. Acoustic tests showed strong absorption (49.5 % at 1600 Hz) and a transmission loss of 31.85 dB. This study highlights the potential of combining natural and recycled materials to develop high-performance bio-based insulation for thermal and acoustic applications.

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植物基天然保温材料与淀粉和废膨胀聚苯乙烯复合粘合剂的协同优化：推进可持续建筑围护结构的热声效率

开发可持续粘合剂和回收废旧材料是实现碳中和建筑材料的关键。本研究优化了一种使用废膨胀聚苯乙烯（EPS）和玉米淀粉的复合粘合剂，用于生物基绝缘，增强了热学和声学性能，同时提高了资源效率。Doehlert实验设计优化了纤维与粘合剂（F/B）比（40 - 100%）和eps与淀粉（E/S）比（0 - 100%），并评估了纤维长度（短与长）。对于短纤维，最佳配方（F/B = 96.74%, E/S = 27.34%）的密度为210.9 kg/m3，导热系数为0.087 W/m·K。长纤维（F/B = 89.72%, E/S = 50%）得到144.2 kg/m3和0.068 W/m·K，符合DIN 4108-2标准。声学测试表明，在1600 Hz时吸收率为49.5%，传输损耗为31.85 dB。这项研究强调了将天然材料和再生材料相结合，开发用于热和声学应用的高性能生物基绝缘材料的潜力。

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来源期刊

Energy and Buildings 工程技术-工程：土木

CiteScore

12.70

自引率

11.90%

发文量

863

审稿时长

38 days

期刊介绍： An international journal devoted to investigations of energy use and efficiency in buildings Energy and Buildings is an international journal publishing articles with explicit links to energy use in buildings. The aim is to present new research results, and new proven practice aimed at reducing the energy needs of a building and improving indoor environment quality.