利用DLC纳米结构涂层改善纳滤膜的物理化学性质与抗污染性能
Improving physico-chemical properties and antifouling of nanofiltration membranes using coating DLC nanostructures
AI总结：
本研究首次在PES纳滤膜表面涂覆DLC纳米结构，通过减小膜孔尺寸和改善亲水性，将盐分离率从64%提升至98%，纯水通量从约8L/m²h提升至65L/m²h，并显著增强膜的抗污染性能和清洗稳定性。
摘要：
本研究首次通过类金刚石碳（DLC）纳米结构涂层对基于聚醚砜（PES）聚合物的纳滤膜进行表面改性，并考察了该涂层对膜性能和抗污染性能的影响。表面改性后的膜在重整过程后显著提高了盐分离性能，且其亲水性高于对照膜。由于表面孔尺寸减小，盐分离率从64%提高到98%。DLC纳米结构与进料溶液接触时的吸收特性被认为是该领域中的另一个原因。由于亲水性的改善，水接触角（CA）也降低，这意味着上述膜的亲水性增加。随着涂层水平的显著提高，通过膜的纯水通量从膜表面一侧到两侧均增加，其值从M0膜的约8L/m²h增加到含M3膜中的65L/m²h。未改性膜的表面形貌由PES膜中平均16nm的粗糙状态转变为改性膜中平均9nm的更光滑状态。通量恢复率和总吸收率与水接触角及计算得到的表面粗糙度参数结果完全一致。通量恢复率的提高和污染率的降低表明涂层过程成功改善了抗污染性能。基于清洗测试，所制备样品对多次清洗循环具有良好的稳定性，这对实际应用而言是一个非常重要的优势。
英文摘要：
In this study for the first time, polymeric nanofiltration membranes based on polyethersulfone (PES) polymer were surface-modified by using a diamond-like carbon (DLC) nanostructure coating layer. The effect of this coating on the performance and anti-fouling properties of the membrane was investigated. The surface-modified membranes significantly improved the salt separation and their hydrophilicity was more than the control membrane after the reformation process. The amount of salt separation increased from 64% to 98% due to the decrease in the size of the holes on the surface. The absorption characteristic of DLC nanostructure in contact with feed solution was reported as another reason in this field. The contact angle (CA) of water also decreased due to the improvement of hydrophilicity, which means the increase of hydrophilicity in the above membranes. The amount of pure water flux passing through the membranes increases from one side of the membrane surface to both sides with the increase significantly of the coating level, so that its value reaches from about 8L/m2h for the M0 membrane to 65L/m2h in the membrane containing M3. The surface morphology of unmodified membranes changed from a rough state with an average of 16nm in PES membranes to a smoother state in modified membranes with an average of 9nm. The recovery rate of the flux and the total absorption rate were obtained in complete agreement with the results obtained from the CA of water and the amount of the calculated surface roughness parameter. The increase in the flux recovery rate and the decrease in the fouling rate indicated the successful improvement of the antifouling properties as a result of the coating process. Based on the washing test, the prepared sample has good stability against the number of washing cycles, which is a very important advantage for practical applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
