Mechanical, Fire Retardant, Water Absorption and Soil Biodegradation Properties of Poly(3-hydroxy-butyrate-co-3-valerate) Nanofilms
Mechanical, Fire Retardant, Water Absorption and Soil Biodegradation Properties of Poly(3-hydroxy-butyrate-co-3-valerate) Nanofilms
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DOI：
10.1007/s10924-019-01517-9
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发表时间：
2019-10
影响因子：
5.3
通讯作者：
S. Zainuddin;S. M. Kamrul Hasan;Daniel Loeven;M. Hosur
中科院分区：
文献类型：
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作者：
S. Zainuddin;S. M. Kamrul Hasan;Daniel Loeven;M. Hosur
生物聚合物提供了潜在的替代品，以合成聚合物来源于稀缺的石油材料，这是不环境友好和生物降解。然而，对于用于生物医学、膜包装、汽车、建筑和商业行业的生物聚合物，存在挑战性或未回答的问题，例如它们的机械性能、耐热性和阻燃性以及暴露于水时的耐久性。在这项研究中，我们研究了一种这样的潜在的生物聚合物，聚（3-羟基丁酸酯-co-3-戊酸酯）（PHBV）的上述性能。首先，在氯仿溶剂的存在下，使用超声过程将0- 15wt%埃洛石纳米管（HNTs）分散在PHBV聚合物中。采用溶液浇铸法制备了PHBV/HNTs薄膜。还制备了不含HNT的PHBV膜（纯的）用于基线比较。然后进行热重分析（TGA）和拉伸试验，以研究这些薄膜的热性能和机械性能。水平燃烧试验（HBT）也进行了研究的阻燃行为。最后，这些复合材料的吸水性和土壤生物降解性行为进行了研究，通过浸没在水中和亚拉巴马土壤条件下的膜。PHBV负载量为3wt%时，PHBV薄膜的热稳定性和拉伸性能得到了最佳的提高。相比之下，具有10-15重量% HNTs负载的膜显示出优于纯对应物的阻燃性、更好的耐水性和更快的土壤降解。
Biopolymers provide potential substitution to synthetic polymers derived from scarce petroleum materials which are not environmental friendly and biodegradable. However, there exists challenging or unanswered questions for biopolymers to be used in biomedical, film packaging, automobile, construction and commercial industries such as their mechanical performance, thermal and fire retardancy, and durability when exposed to water. In this study, we investigated one such potential biopolymer, poly(3-hydroxy-butyrate-co-3-valerate) (PHBV) for the aforementioned properties. At first, 0–15 wt% halloysite nanotubes (HNTs) was dispersed in PHBV polymer using ultrasonication process in presence of chloroform solvent. The solvent was then evaporated and PHBV/HNTs films were prepared by solution casting method. PHBV films without HNTs (neat) were also prepared for baseline comparison. Thermogravimetric analysis (TGA) and tensile tests were then performed to study the thermal and mechanical properties of these films. The horizontal burning test (HBT) was also carried out to investigate the fire retardancy behavior. Finally, the water absorption and soil biodegradability behavior of these composites were investigated by submerging the films in water and Alabama soil conditions. PHBV films with 3 wt% loading showed optimum enhancement in thermal stability and tensile properties. In contrast, films with 10–15 wt% HNTs loading showed superior fire-retardancy, better water resistance and faster soil degradation over neat counterpart.