This work was subjected to study the preparation and properties of biopolymers from modified cassava starch (MCS) with ozone treatment. The MCS was continued to modify by using blending with natural rubber (NR)/poly (vinyl alcohol) (PVA). The effect of the NR content on the physical ‎characteristic of the modification of the MCS blend was examined. The swelling in water, moisture content, moisture absorption, biodegradation and chemical structure by Fourier Transform Infrared Spectrometer were investigated. The rate of evaporation decreased with the enhancing MCS content due to hydrogen bonding interaction. The swelling ratio was decreased according to the MCS content. Moreover, the both moisture content and moisture absorption decreased with increasing the NR content. The elongation at break of the biopolymer was enhanced by the incorporation of NR. The chemical interaction of the PVA/NR/MCS blend was confirmed by swelling ratio in water. It was applied to improve the shelf life of strawberry. The sample provides preservation of the strawberry quality in which it is expected to extend the shelf life of the strawberry. After buried, it easily decomposed in natural soil.

本工作旨在研究经臭氧处理的改性木薯淀粉 (MCS) 生物聚合物的制备和性能。通过与天然橡胶 (NR)/聚（乙烯醇）(PVA) 共混，继续对 MCS 进行改性。研究了 NR 含量对 MCS 共混物改性物理特性的影响。用傅里叶变换红外光谱仪研究了水溶胀、含水率、吸湿性、生物降解性和化学结构。由于氢键相互作用，蒸发速率随着 MCS 含量的增加而降低。根据 MCS 含量，溶胀率降低。此外，水分含量和吸湿率都随着天然橡胶含量的增加而降低。掺入天然橡胶提高了生物聚合物的断裂伸长率。PVA/NR/MCS 共混物的化学相互作用通过在水中的溶胀比得到确认。用于提高草莓的货架期。该样品提供了草莓品质的保存，预计可以延长草莓的保质期。掩埋后，在自然土壤中易分解。