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首页> 外文期刊>Journal of Applied Polymer Science >Cost-effective synthesis of polyricinoleate: Investigation of coating characteristics, in vitro degradation, and antibacterial activity
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Cost-effective synthesis of polyricinoleate: Investigation of coating characteristics, in vitro degradation, and antibacterial activity

机译：经济高效合成的多素糖：涂层特征，体外降解和抗菌活性的研究

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Ricinoleic acid (RA) is a component of various bio-based copolymers. However, high-molecular weight polyricinoleate homopolymers are not widely investigated due to high cost of commercial monomer and catalysts. In this work, we present low-cost approach for the synthesis of high-molecular-weight polyricinoleate by preparing large amount of pure monomer and use of lipozyme TL IM as catalyst. First, polymerization conditions were optimized and comparative studies of medium-molecular-weight polyricinoleate (PRA-M) of M-w = 30 000 gmol(-1) and high-molecular-weight polyricinoleate (PRA-H) of M-w = 72 000 gmol(-1) were conducted. Polyricinoleates were characterized by common spectroscopic, chromatographic, and thermal methods. Solvent casting of polyricinoleates resulted in thin and continuous coating with perfectly smooth surface under SEM observation. AFM analysis of PRA films showed that surface roughness decreased with increasing molecular weight of polyricinoleate (roughness PRA-M = 68.39 nm and PRA-H = 57.36 nm). Degradation studies under in vitro conditions showed that both PRA-M and PRA-H showed good stability with only ~2% of mass loss after 6 months, possibly due to its hydrophobic nature and relatively high-molecular weight. In contrast to RA, PRA-M and PRA-H do not have significant antibacterial effect on Staphylococcus aureus and Escherichia coli. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48172.
机译：蓖麻油酸（Ra）是各种生物基共聚物的组分。然而，由于商业单体和催化剂的高成本，不被广泛​​研究高分子量多淀粉酸均聚物。在这项工作中，我们通过制备大量纯单体和使用Lipozyme TL IM作为催化剂来呈现低成本的方法来合成高分子量多溶解体。首先，优化聚合条件，MW = 30 000gmol（-1）和MW = 7200种GMOL的高分子量多粒子（PRA-H）的中分子量多素（PRA-M）的比较研究。 -1）进行了。通过常见的光谱，色谱和热方法表征多淀粉。多溶胶的溶剂铸造导致薄连续涂层，在SEM观察下具有完全光滑的表面。对PRA薄膜的AFM分析表明，随着多溶液的分子量增加（粗糙度PRA-M = 68.39nm和PRA-H = 57.36nm），表面粗糙度降低。在体外条件下的降解研究表明，PRA-M和PRA-H均显示出良好的稳定性，仅在6个月后仅〜2％的质量损失，可能是由于其疏水性质和相对高分子量。与Ra相反，PRA-M和PRA-H对金黄色葡萄球菌和大肠杆菌没有显着的抗菌作用。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48172。

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