Shelled herbal foods are widely consumed. The evaluation of the shells of these foods is important due to their features such as low cost, ease of recycling and environmental friendliness. In this study, hazelnut shell (HS), pistachio shell (PS), and apricot kernel shell (AKS) were brought to powder particles by grinding to dimensions of 300–425 µm. Some of the powder particles were converted into ash at 900°C. The amounts of cellulose, ash, humidity, and metal in these particles via chemical analyses were determined, while their structural properties via X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FT-IR) analyses. Composite materials were produced by adding 15 wt.% to the polyester matrix material from these powder particles and ashes. Compression strength, hardness, specific weight, and thermal conductivity of these composites were analyzed. The lowest and highest humidity, ash, cellulose, hemicellulose, and lignin ratios in powders showed differences depending on the type of powders. The amount of Sn and K in the HS, PS, and AKS powders were close to each other, while the amount of Ca, Na, Mg, Fe, Mn, Cu, Zn and Si was higher in AKS powder. The reinforcement adding to the polyester increased the compression strength, hardness, specific weight and thermal conductivity properties.

带壳草药食品被广泛食用。由于这些食品的外壳具有成本低、易于回收和环境友好等特点，因此对其外壳的评估非常重要。在这项研究中，榛子壳 (HS)、开心果壳 (PS) 和杏仁壳 (AKS) 通过研磨至 300–425 µm 的尺寸被制成粉末颗粒。一些粉末颗粒在 900°C 时转化为灰分。通过化学分析确定了这些颗粒中纤维素、灰分、湿度和金属的含量，同时通过 X 射线衍射 (XRD) 和傅里叶变换红外光谱 (FT-IR) 分析确定了它们的结构特性。复合材料是通过从这些粉末颗粒和灰烬中向聚酯基体材料中添加 15%（重量）来生产的。抗压强度、硬度、比重、并对这些复合材料的热导率进行了分析。粉末中的最低和最高湿度、灰分、纤维素、半纤维素和木质素比率显示出取决于粉末类型的差异。HS、PS和AKS粉末中Sn和K的含量彼此接近，而AKS粉末中Ca、Na、Mg、Fe、Mn、Cu、Zn和Si的含量较高。添加到聚酯中的增强材料增加了压缩强度、硬度、比重和导热性能。