溶解

Abstract(#br)We investigated the effects of different bioavailability scenarios on the rhamnolipid-enhanced biodegradation of pyrene by the representative polycyclic aromatic hydrocarbon degrader Mycobacterium gilvum VM552. This biosurfactant enhanced biodegradation when pyrene was provided in the form of solid crystals; no effect was observed when the same amount of the chemical was preloaded on polydimethylsiloxane (PDMS). An enhanced effect was observed when pyrene was sorbed into soil but not with the dissolved compound.

细菌对抗生素的耐药性降低了医疗器械领域对抗生素的需求。高分子抗菌材料在医学领域显示出巨大的潜力。然而，材料使用后的处理并不环保。因此，开发可溶性高分子抗菌材料成为迫切的挑战。本文报道了一种具有高自愈能力和快速溶解的抗菌高分子材料。以对苯二甲酸( TA )、3，4 -二氨基呋咱( DAF )和α，ω-氨丙基封端的聚二甲基硅氧烷( PDMS )为原料，经席夫碱反应和醛基与氨基的交联反应，制得了新材料。锌离子与3，4 -二氨基呋咱的氮、氧原子配位进一步增强了材料的性能，我们设计的抗菌高分子材料在100   ° C下可有效修复，首次修复效率为89.5 %。经反复修复后，其力学性能没有明显降低。采用大肠杆菌和金黄色葡萄球菌对材料的抗菌性能进行评价。材料的抗菌效率分别为99.9993 %和99.9997 %。这一新思路解决了当前应用中亟待解决的问题，为柔性抗菌材料的研究提供了指导。