Abstract Focus on the potential application in oil-water separation for porous and biodegradable Poly(L-latic acid) (PLLA) amenable to economically viable water treatment, we designate the controllable pores, fibrillary network and protrusion structure by crystallization induced phase separation in poly(L-latic acid)/Zinc oxid (PLLA/ZnO) materials, ready for their potential application in oil-water separation. It’s worth noting that the interface effect between PLLA and ZnO is strengthened by silane coupling agent KH570. The crystallinity of the PLLA/ZnO@KH570 materials are correspondingly increased from 36.9% to 41.1% as the slightly increasing content of ZnO@KH570 from 1% to 7%, indicating that ZnO@KH570 nanoparticles can act as heterogeneous nucleating agent to promote crystallization of PLLA, which facilitate the conversion of PLLA solution from liquid-liquid phase separation mechanism to solid-liquid phase separation mechanism, resulting in the formation of microstructures. Very interestingly, the porosity of PLLA/ZnO@KH570 composite is highest up to 94.1% compared to its value of 87.8% for pure PLLA. Due to the multiple structures, the water contact angle of composite is significantly improved to 146°, allowing the oil/water mixture solution to be effectively separated. In brief, we have successfully manufactured hydrophobic PLLA/ZnO@KH570 composite with the multi-scale microstructure which may be potentially applied in oil-water separation.

中文翻译：

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界面结晶促进 PLLA/ZnO 复合材料的结构转化在油水分离中的潜在应用

摘要 着眼于经济可行的水处理的多孔和可生物降解的聚（L-乳酸）（PLLA）在油水分离中的潜在应用，我们通过结晶诱导相分离指定了可控的孔隙、纤维网络和突起结构。 (L-乳酸)/氧化锌 (PLLA/ZnO) 材料，为它们在油水分离中的潜在应用做好准备。值得注意的是，硅烷偶联剂KH570增强了PLLA和ZnO之间的界面效应。随着ZnO@KH570的含量从1%增加到7%，PLLA/ZnO@KH570材料的结晶度相应地从36.9%增加到41.1%，表明ZnO@KH570纳米颗粒可以作为异相成核剂促进结晶PLLA，这有利于 PLLA 溶液从液-液相分离机制转变为固-液相分离机制，从而形成微结构。非常有趣的是，与纯 PLLA 的 87.8% 值相比，PLLA/ZnO@KH570 复合材料的孔隙率最高可达 94.1%。由于多重结构，复合物的水接触角显着提高到146°，使得油水混合物溶液得到有效分离。简而言之，我们已成功制造出具有多尺度微观结构的疏水性 PLLA/ZnO@KH570 复合材料，该复合材料可用于油水分离。与纯 PLLA 的 87.8% 相比，PLLA/ZnO@KH570 复合材料的孔隙率最高可达 94.1%。由于多重结构，复合物的水接触角显着提高到146°，使得油水混合物溶液得到有效分离。简而言之，我们已成功制造出具有多尺度微观结构的疏水性 PLLA/ZnO@KH570 复合材料，可潜在应用于油水分离。与纯 PLLA 的 87.8% 相比，PLLA/ZnO@KH570 复合材料的孔隙率最高可达 94.1%。由于多重结构，复合物的水接触角显着提高到146°，使得油水混合物溶液得到有效分离。简而言之，我们已成功制造出具有多尺度微观结构的疏水性 PLLA/ZnO@KH570 复合材料，可潜在应用于油水分离。