本科毕业论文(2019届)题目二维材料糁杂纳滤膜分离性能研究学院材料与环境工程学院专业环境工程班级学号学生姓名指导教师完成日期2019年5月杭州电子科技大学本科毕业论文摘要现如今，中国经济正在不断蓬勃发展，人们的生活质量与日俱增，故而以往所一直沿用的污水处理技术，已经远不能达到当今社会所提出的一系列标准。在此背景下，学者纷纷致力于研究出更为高效并极富生态性的污水处理技术。分离膜方法与技术就是其中尤为关键的技术之一。通常情况下，高分子纳米过滤膜将能细分为两大类别，其中包含复合膜，此外还涉及到质膜，而前者所占据的应用比例较高，其自身的表层甚至可达纳米级别。正因如此，其对纳滤膜相对于盐溶液所表现出的渗透性能来说尤为关键。通常情况下，绝大多数复合纳滤膜所含的超薄表层均能借助于界面聚合法来获得。对于此类方法而言，其主要基于两种彼此独立的聚合高分子溶液，在多样化溶剂的前提下，依次添加两类活性单体。此时，若两者彼此之间出现分散现象，则两个溶液就可以发生聚合反应，这两种溶液的反应特点，即反应于两种溶液彼此之间的界面位置。在本篇论文中，即借助于界面聚合反应的作用进行实验。首先，笔者将反应物设定为某特定的羟基化合物，并由此成功获得聚酯复合膜。在此过程中，需要针对该物质的成膜性能以及反应物所添加的实际浓度等诸多因素，进行科学合理的综合考量。其中，基膜主要选择聚砜超滤膜（英文简称PS℉），此时若将水相反应物设定为优良的羧化壳聚糖，则将可与均苯三甲酰氯进行有机结合，并一致作为相应的有机相反应物。在此之后，仅需于基膜表面产生一系列界面聚合反应，即可成功获得与之相匹配的聚酯超薄纳滤功能层。此时，通过借助于某特定测验装置的作用，将可针对该膜基于MgC12溶液以及MgS04溶液等若干溶液，所表现出的分离性能进行科学有效的细致对比。并且针对反应物浓度等基本参数，相对于复合膜所含的分离性能而产生的一系列影响，进行更深层次的细致研究。经由权威研究结果得知：若反应物浓度逐步递增，则复合膜所表现出的膜通量也将逐步降低，并会提高对盐的截留比例。值得一提的是，若羧化壳聚糖表现出的真实浓度不超过2.0wt%,则在此情况下，复合膜相对于下述溶液所表现出的截留率，由高至低依次如下：NaS0,>NaC1>Mgs0,>MgCl2。与此同时，若羧化壳聚糖表现出的真实浓度超过2.0wt%,则在此情况下，复合膜相对于下述溶液所表现出的截留率，由高至低依次如下：NaS0,>MgS0,>NaC1>MgC1。由于时间的推移，交联反应表现出的沉积层数量将逐步攀升，并且复合膜所表现出的膜通量也将逐步降低，还会提高对盐的截留比例。在此情况下，复合膜相对于下述盐溶液所表现出的截留率，由高至低依次如下：的荷负电膜之一，故而其相对于二价阴离子将表现出尤为显著的截留率。关键词：聚酯复合膜；界面聚合：纳滤：羧化壳聚糖：均苯三甲酰氯杭州电子科技大学本科毕业论文ABSTRACTNowadays,China's economy is constantly developing and people's quality of life isincreasing day by day.Therefore,the sewage treatment technology that has been used in thepast has been far from meeting a series of standards proposed by today's society.In thiscontext,scholars are committed to researching more efficient and ecologically efficientwastewater treatment technologies.Separation membrane methods and techniques areamong the most critical technologies.Under normal circumstances,polymer nanofiltrationmembranes can be subdivided into two major categories,including composite membranes,in addition to the plasma membrane,while the former occupies a higher proportion ofapplications,its own surface layer can even reach the nanometer level 1].For this reason,itis especially critical for the permeability of the nanofiltration membrane relative to the saltsolution.In general,the ultra-thin surface layer of most composite nanofiltration membranescan be obtained by means of interfacial polymerization.For such a method,it is mainly basedon two mutually independent polymeric polymer solutions,and two types of activemonomers are sequentially added under the premise of diversifying solvents.At this time,ifthe two are dispersed with each other,the two solutions can be polymerized,and thereaction characteristics of the two solutions,that is,the reaction sites between the twosolutions.In this paper,experiments are carried out by means of the action of interfacialpolymerization.First,the author sets the reactants to a specific hydroxy compound,andthereby successfully obtains a polyester composite film.In this process,it is necessary tocarry out scientific and reasonable comprehensive considerations for many factors such asthe film-forming properties of the substance and the actual concentration of the reactants.Among them,the base film mainly selects polysulfone ultrafiltration membrane (referred toas PSF).At this time,if the aqueous phase reactant is set to excellent carboxylated chitosan,it can be organically combined with trimesoyl chloride.As the corresponding organic phasereactant.After that,only a series of interfacial polymerization reactions on the surface of thebase film are required to successfully obtain the matching ultra-thin nanofiltration functionallayer of the polyester [2].At this time,by means of the action of a specific test device,theseparation performance exhibited by the film based on the MgCl2 solution and the MgSO4solution can be scientifically and effectively compared.Further,a series of in-depth studieson the basic parameters such as the concentration of the reactants and the separation