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首页> 外文期刊>Journal of Applied Polymer Science >Effect of glassy carbon addition and photodegradation on the biodegradation in aqueous medium of poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/glassy carbon green composites
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Effect of glassy carbon addition and photodegradation on the biodegradation in aqueous medium of poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/glassy carbon green composites

机译：玻碳加法和光降解对聚（3-羟基丁酯-C-3-羟基戊烯盐）/玻碳碳绿色复合材料水性介质中生物降解的影响

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摘要

The use of biodegradable polymers is an interesting way to reduce the polymeric waste accumulation in the environment. However, the addition of fillers to biodegradable polymer matrices may decrease their biodegradability. Glassy carbon (GC) is a promising carbon material that can be employed as a filler in the production of antistatic packaging utilized to protect electronic components. The use of a biodegradable polymeric matrix such as poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) can be an excellent alternative for the preparation of green composites to be used in these packages. This work aims to evaluate the effect of the GC addition and the GC particle size on the biodegradability of the PHBV matrix, as well as to study the result of the employment of a previous photodegradation treatment on the biodegradation in aqueous medium of PHBV/GC composites. Scanning electron microscopy, residual weight measurement (%) and surface roughness showed that GC does not interfere negatively with PHBV biodegradability. Differential scanning calorimetry analysis and residual weight measurement permitted to suggest that the increase in the crystallinity degree of PHBV and PHBV/GC samples occasioned by the ultraviolet radiation hindered the water and enzyme access to the bulk of the materials, decreasing the biodegradability.
机译：可生物降解聚合物的使用是减少聚合物废物在环境中积累的一种有趣的方法。然而，在可生物降解聚合物基质中添加填料可能会降低其生物降解性。玻璃碳（GC）是一种很有前途的碳材料，可作为填料用于生产用于保护电子元件的抗静电包装。使用可生物降解的聚合物基质，例如聚（3-羟基丁酸酯-co-3-羟基戊酸酯）（PHBV）可以是制备用于这些包装中的绿色复合材料的极好替代品。本研究旨在评估GC添加量和GC粒径对PHBV基质生物降解性的影响，以及研究先前光降解处理对PHBV/GC复合材料在水介质中生物降解的影响。扫描电子显微镜、残余重量测量（%）和表面粗糙度表明，GC不会对PHBV的生物降解性产生负面影响。差示扫描量热分析和剩余重量测量表明，紫外线辐射导致PHBV和PHBV/GC样品结晶度增加，阻碍了水和酶进入大部分材料，降低了生物降解性。

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