纳滤膜广泛应用于生物工业和工业污染物处理等方面.本文采用干-湿法纺丝工艺制备CTA中空纤维纳滤膜,采用数显电导率仪、机械性能测试仪以及扫描电镜等技术,考察了非溶剂含量以及添加剂种类对膜结构和性能的影响.结果 表明,不同非溶剂EG含量(0,2％,4％,6％和8％)中以EG含量为8％时,中空纤维膜对PEG2000的截留达到最大,当EG含量为4％时,中空纤维膜对盐的截留达到最大,膜的整体性能最好；此外,
为了克服广泛存在于聚合物膜中的渗透和选择性能之间的“trade off"效应，端羟基超支化聚酯(HPE)首次作为界面聚合反应中的具有纳米尺寸的大分子单体与水相单体哌嗪(PIP)共混调控聚酰胺纳滤膜的皮层结构和性能。制备的纳滤膜皮层结构和化学组成利用ATR-FTIR、FESEM、AFM等手段进行表征，使用渗透通量和对不同盐截留率对膜性能进行评价。结果 表明，当HPE在HPE/PIP混合单体中的比例不
高耐氯性是21世纪反渗透复合膜研究的重要课题。现有的研究主要是通过调整聚酰胺分子链化学结构及膜表面化学接枝或涂覆保护层来强化聚酰胺膜的耐氯性，而对反渗透膜进行化学试剂浸泡处理也是常用的化学改性方法，常用的化学试剂如有机酸、无机酸和苯酚等，本文将聚酰胺层在过硫酸盐溶液中浸泡，然后烘干，得到耐氧化复合反渗透膜；该膜具有较高的耐氯性能。改性后聚酰胺皮层结构完整保留了“脊谷结构”，亲水性也得到了改善。这种
In order to improve the survival rate of breast cancer patients and increase more changes of breast-conserving,the non-invasive early diagnosis of breast cancer is the most effective way1.In the prese
近年来,由于氧化石墨烯(graphene oxide,GO)特殊的结构和性能,引起了研究者的兴趣.GO含有的极性含氧官能团使其具有优良的分散性、亲水性、与聚合物的兼容性等,因此被广泛作为添加剂以改善膜的亲水性和表面电荷密度.通常,作为添加剂的都是未改性的GO.为更加充分地利用GO,本文在Hummers法自制GO后再利用氢溴酸和草酸对GO进行开环反应和酯化反应,制备了羧基化氧化石墨烯(CFGO).紫
Cancer is one of the deadliest diseases in todays world [1].In order to improve the treatment effect of tumor,the early diagnosis of tumor is one of the most important and the most effective means.In
The incidence of thyroid cancer has increased substantially all over the world recently(1),(2).Especially the female incidence of thyroid cancer ranks eighth in the worldwide scale(3).As the most comm
In this work,we develop a paper-based analytical device using immobilized silica-coated QDs as miniaturized platforms for multiplexed detection of G-quadruplex DNA.Green-emitting CdSe@ZnS QDs are coat
Multifunctional nanoparticles with combined diagnostic and therapeutic functions show great promise in nanomedicine.Herein,we develop an organic photodynamic therapy(PDT)system based on polyethylene g
Insight into selective imaging of target molecules is critical for a further understanding of their complex biological functions and processes in a cellular system(1).Ribonucleic acids(RNA)are known t