Effect of hydroxyapatite on physical, mechanical, and morphological properties of starch-based bio-nanocomposite films

Composites and Advanced Materials Pub Date : 2022-01-01 DOI:10.1177/26349833221087755

Zohreh Hadi, Neda Hekmat, Fariba Soltanolkottabi

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引用次数: 1

Abstract

In this research, nanocomposite films based on starch were developed with the addition of hydroxyapatite nanoparticles as a mineral filler. Hydroxyapatite was synthesized by a chemical method using calcium nitrate and diammonium hydrogen phosphate. Various concentrations of hydroxyapatite nanoparticles were mixed with starch, and the developed films were evaluated in terms of physical, mechanical, and morphological properties. The highest values of mechanical parameters (tensile strength and elongation at break) were determined for the starch/hydroxyapatite film at 15 wt.% hydroxyapatite nanoparticles concentration (3.03 MPa, 37.41%, respectively). As hydroxyapatite concentration was increased from 0 to 20 wt.%, the solubility in water of the films decreased, whereas the solubility in acid increased. The crystalline structure of hydroxyapatite decreased the transparency of film and increased transparency value. Thus, a biodegradable film could be obtained with the addition of hydroxyapatite as a reinforcement filler up to 15 wt.%. It could be developed as a sustainable alternative for packaging industry.

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羟基磷灰石对淀粉基生物纳米复合膜物理、力学和形态性能的影响

本研究以羟基磷灰石为填料，制备了淀粉基纳米复合薄膜。以硝酸钙和磷酸氢二铵为原料，采用化学方法合成了羟基磷灰石。将不同浓度的羟基磷灰石纳米颗粒与淀粉混合，并从物理、力学和形态学方面对所制备的薄膜进行了评价。当纳米羟基磷灰石浓度为15 wt.% (3.03 MPa, 37.41%)时，淀粉/羟基磷灰石薄膜的力学参数(抗拉强度和断裂伸长率)最高。当羟基磷灰石浓度从0 wt.%增加到20 wt.%时，膜在水中的溶解度降低，而在酸中的溶解度增加。羟基磷灰石的晶体结构降低了薄膜的透明度，提高了透明度值。因此，添加羟基磷灰石作为补强填料可获得可生物降解的薄膜，补强填料可达15 wt.%。它可以作为包装工业的可持续替代品。

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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Composites and Advanced Materials

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