Nanocellulose and chitosan have recently started to get attention as environmentally friendly piezoelectric materials for sensor and energy harvesting applications. Conversely, current commercially available flexible piezoelectric films made of for example polyvinylidene difluoride (PVDF) are relatively expensive and made from non-renewable materials. We measured the piezoelectric responses (2-8 pC/N) for solvent casted films based on nanocellulose, microcrystalline chitosan and their blends. In addition, the tensile properties of the piezoelectric films were characterized to find out if chitosan could be used to enhance the flexibility of the brittle nanocellulose films. Based on the results, plain chitosan is an interesting piezoelectric material itself. In addition, blending nanocellulose and chitosan could be a potential method for tailoring the properties of solvent casted low cost, green piezoelectric films.

纳米纤维素和壳聚糖作为用于传感器和能量收集应用的环保压电材料，最近开始受到关注。相反，当前由例如聚偏二氟乙烯（PVDF）制成的可商购的柔性压电膜相对昂贵并且由不可再生的材料制成。我们测量了基于纳米纤维素，微晶壳聚糖及其共混物的溶剂浇铸薄膜的压电响应（2-8 pC / N）。此外，对压电薄膜的拉伸性能进行了表征，以确定是否可以使用壳聚糖来增强脆性纳米纤维素薄膜的柔韧性。根据结果​​，普通壳聚糖本身就是一种有趣的压电材料。此外，