Microbial desulfurization for NR ground rubber by Thiobacillus ferrooxidans
Microbial desulfurization for NR ground rubber by Thiobacillus ferrooxidans
复制标题
DOI：
10.1002/app.31904
复制
发表时间：
2010-06
影响因子：
3
通讯作者：
Guangming Jiang;Suhe Zhao;Jingyuan Luo;Ya-qin Wang;Wangyang Yu;Cuiru Zhang
中科院分区：
文献类型：
--
作者：
Guangming Jiang;Suhe Zhao;Jingyuan Luo;Ya-qin Wang;Wangyang Yu;Cuiru Zhang
利用具有硫氧化能力的氧化亚铁硫杆菌对NR胶粉进行微生物脱硫研究。在改良的9 K培养基中培养T.氧化亚铁FTIR-ATR和XPS谱图以及介质中SO含量的增加表明聚合物主链没有被T.橡胶粉表面的氧化亚铁、SS键部分氧化为亚砜和砜，最后部分氧化为SO。研磨橡胶的累积硫转化率为16%（w/w），这意味着在培养20天后，16%的硫已经完全氧化为SO。提出了硫氧化机制来解释T.氧化亚铁测定了炭黑补强SBR硫化胶与40份脱硫废胶粉并用胶的物理性能。与未改性的胶粉相比，脱硫胶粉填充SBR硫化胶的拉伸强度和扯断伸长率可提高。扫描电镜照片和DMA结果表明，脱硫胶粉与SBR基体之间具有良好的界面相容性。© 2010 Wiley Periodicals，Inc.应用聚合物科学杂志，2010年
This study concentrated on microbial desulfurization for NR ground rubber by Thiobacillus ferrooxidans with sulfur oxidizing capacity. NR ground rubber was desulfurizated in the modified 9K medium during the cultivation of T. ferrooxidans. FTIR–ATR and XPS spectra and the increase of SO in the medium indicated that the main chains of the polymer were not broken by T. ferrooxidans, and SS linkages on the surface of ground rubber were partly oxidized to sulfoxide and sulfone, and at last partly oxidized to SO. Cumulative sulfur convention of ground rubber was 16% (w/w), which means 16% of sulfur has been fully oxidized to SO after 20 days' incubation. A sulfur oxidative scheme was proposed to explain the microbial desulfurization by T. ferrooxidans. Physical properties were determined on carbon black enforced SBR vulcanizates compounded with desulfurizated ground rubber of 40 phr loading. Preferable tensile strength and elongation at break were obtained for SBR vulcanizates filled with desulfurizated ground rubber if compared with that one obtained using ground rubber without modification. Scanning electron microscope photographs and DMA results suggested good interface coherence between desulfurizated ground rubber and SBR matrix. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010