Abstract

This work studied the biodegradative activity of Pseudomonas geniculata WS3 and Stenotrophomonas pavanii CH1, PLA-degrading bacteria, on films with different ratios of polybutylene succinate (PBS)/polylactic acid (PLA), in submerged cultures. Effects of PBS, dicumyl peroxide (DCP) and 2-hydroxypropyl-3-piperazinyl quinoline carboxylic acid methacrylate (HPQM) of in situ compatibilized PBS/PLA blends were also examined under soil burial biodegradation at mesophilic and thermophilic conditions. The results from the submerged experiments showed that the weight loss of PBS/PLA blends increased with increasing PBS content. All blending ratios of PBS/PLA were more degraded by P. geniculata WS3 than S. pavanii CH1. After soil burial, PBS/PLA films with 40/60 wt% showed higher biodegradation than those with 20/80 wt% with or without P. geniculata WS3 inoculation. However, the biodegradation of PBS/PLA blends inoculated with P. geniculata WS3 was higher than that of the uninoculated treatment. The addition of DCP in PBS/PLA blends decreased the biodegradation and weight loss. Unexpectedly, the degree of biodegradation and weight loss of PBS/PLA at a ratio of 20/80 wt% with DCP added were higher than that of PBS/PLA at a ratio of 40/60 wt% with DCP added. The addition of HPQM, showing antibacterial properties, decreased the biodegradation of PBS/PLA blends by 1.4 to 1.8-fold compared to those without HPQM addition. It could be concluded that the inoculation of P. geniculata WS3 mainly promoted the biodegradation of PBS/PLA blends under mesophilic condition. However, the addition of DCP and HPQM decreased the biodegradation of the PBS/PLA blends.

中文翻译：

---

接种假单胞菌WS3促进土壤原位相容的掺入HPQM的PBS / PLA共混物的生物降解过程

摘要

这项工作研究了P-假单胞菌WS3和斑节气单胞菌CH1（PLA降解细菌）在水下培养物中不同比例的聚丁二酸琥珀酸酯（PBS）/聚乳酸（PLA）的薄膜上的生物降解活性。在土壤埋藏在中温和嗜热条件下进行生物降解时，还研究了原位相容的PBS / PLA共混物的PBS，过氧化二枯基（DCP）和2-羟丙基-3-哌嗪基喹啉羧酸甲基丙烯酸酯（HPQM）的影响。淹没实验的结果表明，PBS / PLA共混物的重量损失随着PBS含量的增加而增加。PBS / PLA的所有混合比率更由降解P.膝WS3比S. pavaniiCH1。土埋后，PBS / PLA膜用40/60重量％显示出比那些具有20/80重量％具有或不具有生物降解更高P.膝WS3接种。然而，随着接种PBS / PLA掺混物的生物降解P.膝WS3明显高于未接种的治疗的高。在PBS / PLA共混物中添加DCP可以降低生物降解和重量减轻。出乎意料的是，添加DCP的比例为20/80重量％的PBS / PLA的生物降解度和重量损失高于添加DC​​P的比例为40/60重量％的PBS / PLA的生物降解度和重量损失。与未添加HPQM的HPQM相比，具有抗菌性能的HPQM的添加将PBS / PLA共混物的生物降解降低了1.4至1.8倍。可以得出结论：破种假单胞菌的接种WS3主要促进中温条件下PBS / PLA共混物的生物降解。但是，添加DCP和HPQM会降低PBS / PLA共混物的生物降解性。