Focused on the design and construction of controllable surface microtopographyand interconnected pore morphologyof porous poly (L-lactic acid) membrane. Asimple solvent evaporation-induced precipitation methodis proposed to regulate microstructures by one-step method without any additive. Controllable microstructures (fibrous networks, interconnected pores, and crystallized PLLA protrusions) and interconnected pore morphology were facilely achieved by adjusting the PLLA concentration and/or precipitation temperature. In view of the shortcomings of previous foam preparation, the contact area between solvent and non-solvent was broadenedto realize the improvement of porosity and the construction of surface micro-nano structure. The results show that the crystallinity of prepared PLLA membranes is kept in a high range between 61.8% and 75.8% and the maximum watercontact angle (WCA) is largely increased to 142.3°. Surprisingly, surface wettability of PLLA membranes possess the wonderful mechanical damage resistance, and the porosity and oil-absorption capacity are increased to 90.8% and 24.1 g/grespectively. Predictably, the porous PLLA membrane has great application potential as a biodegradable oil-water separation material.

着眼于可控表面微观形貌的设计和构建以及多孔聚（L-乳酸）膜的互连孔形态。提出了一种简单的溶剂蒸发诱导沉淀法，通过一步法在无任何添加剂的情况下调节微观结构。通过调节PLLA浓度和/或沉淀温度，可以轻松实现可控的微结构（纤维网络，相互连接的孔和结晶的PLLA突起）和相互连接的孔形态。鉴于先前泡沫制备的缺点，拓宽了溶剂与非溶剂之间的接触面积，以实现孔隙率的改善和表面微纳米结构的构建。结果表明，制备的PLLA膜的结晶度保持在61.8％至75之间的高范围内。8％，最大水接触角（WCA）大大增加到142.3°。令人惊讶的是，PLLA膜的表面润湿性具有出色的抗机械损伤性，并且孔隙率和吸油量分别增加到90.8％和24.1 g / g。可以预期，多孔PLLA膜作为可生物降解的油水分离材料具有巨大的应用潜力。