5-磺酸-2-氨基苯甲酸改性聚酰胺6平板膜的制备及其性能
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摘要
为了提高聚酰胺6(PA6)平板膜的抗污染性能,将一定量的5-磺酸-2-氨基苯甲酸(5SAA)与ε-己内酰胺共聚,在PA6中引入亲水的磺酸基团,通过红外分析(FT-IR)、热重分析法(TGA)、差热扫描分析(DSC)表明成功制得带有磺酸基团的聚酰胺6(SPAmine6-2.5);采用浸没沉淀法制备SPAmine6-2.5平板膜,探究不同凝固浴对SPAmine6-2.5的成膜性能、膜的理化性质和耐污染能力的影响.通过ATR-IR和KRUSS动态接触角测定仪表征膜的化学结构及亲水性.结果表明:5SAA的引入大大提高膜表面的亲水性及抗污染能力,当凝固浴为水∶乙醇(质量比)=74∶26时制备的平板膜的水接触角最小为50°,通量为289.1 L/(m2·h),纯水回复率最大为65%,比PA6平板膜提高了54%.
In order to improve the anti-fouling properties of PA6 flat membrane, hydrophilic sulfonic acid groups were introduced into PA6 by copolymerization of a certain amount of 5-sulfonic acid-2-amino benzoic acid(5 SAA)and ε-caprolactam. The results of FT-IR,TG and DSC showed that polyamide 6 with sulfonic acid group(SPAmine6-2.5) was successfully obtained. SPAmine6-2.5 flat membranes were prepared by immersion-precipitation method. The effects of different coagulation baths on the film-forming properties, the physical and chemical properties and the resistance to contamination of SPAmine6-2.5 were investigated. The surface chemistry and hydrophilicity of films were analyzed by FT-IR and KRUSS dynamic contact angle measuring instrument. The results showed that the hydrophilicity and anti-fouling ability of the membrane were greatly improved by the introduction of 5 SAA. When the coagulation bath with water ∶ ethanol = 74 ∶ 26, the water contact angle of the flat membrane was 50° and the flux was 289.1 L/(m2·h), the recovery rate of pure water was65%,which was increased by 54% than that of the PA6 flat membrane.
In order to improve the anti-fouling properties of PA6 flat membrane, hydrophilic sulfonic acid groups were introduced into PA6 by copolymerization of a certain amount of 5-sulfonic acid-2-amino benzoic acid(5 SAA)and ε-caprolactam. The results of FT-IR,TG and DSC showed that polyamide 6 with sulfonic acid group(SPAmine6-2.5) was successfully obtained. SPAmine6-2.5 flat membranes were prepared by immersion-precipitation method. The effects of different coagulation baths on the film-forming properties, the physical and chemical properties and the resistance to contamination of SPAmine6-2.5 were investigated. The surface chemistry and hydrophilicity of films were analyzed by FT-IR and KRUSS dynamic contact angle measuring instrument. The results showed that the hydrophilicity and anti-fouling ability of the membrane were greatly improved by the introduction of 5 SAA. When the coagulation bath with water ∶ ethanol = 74 ∶ 26, the water contact angle of the flat membrane was 50° and the flux was 289.1 L/(m2·h), the recovery rate of pure water was65%,which was increased by 54% than that of the PA6 flat membrane.
引文
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[3]BURYA A I,YERIOMINA Y A.The effect of various metallic filling materials on the wear resistance of aromatic-polyamidebased composite materials[J].Journal of Friction and Wear,2016,37(2):151-154.
[4]SOBOTOVA J,JURCI P,DLOUHY I.The effect of subzero treatment on microstructure,fracture toughness,and wear resistance of Vanadis 6 tool steel[J].Materials Science&Engineering A,2016,652:192-204.
[5]AVRIL F,RAHM魪R,DOUX M,et al.New polymer materials for steel/polymer/steel laminates in automotive applications[J].Macromolecular Materials&Engineering,2013,298(6):644-652.
[6]PANT H R,BAJGAI M P,NAM K T,et al.Electrospun nylon-6 spider-net like nanofiber mat containing Ti O2nanoparticles:A multifunctional nanocomposite textile material[J].Journal of Hazardous Materials,2011,185(1):124-130.
[7]SHI W,ZHANG F B,ZHANG G L,et al.Preparation of chitosan-coated nylon membranes and their application as affinity membranes[J].Chinese Chemical Letters,2005,16(8):1085-1088.
[8]程梦洲,陈强,刘平生,等.抗凝血尼龙膜的制备及表征[J].材料导报,2012,26(18):66-70.CHEN M Z,CHEN Q,LIU P S,et al.Preparation and characterization of anticoagulant nylon membranes[J].Chinese Journal of Materials Research,2012,26(18):66-70(in Chinese).
[9]LIU Y L,LIU S,YIN C Y.Synthesis and structure-property of polyamide 6/macrogol/attapulgite nanocomposites[J].Polymer Composites,2014,35(9):1852-1857.
[10]KIM J G,LEE J,SON Y.Toughening of nylon 6 with a ethylene-octene copolymer grafted with maleic anhydride and styrene[J].Materials Letters,2014,126:43-47.
[11]LEISTNER M,HAILE M,ROHMER S,et al.Water-soluble polyelectrolyte complex nanocoating for name retardant nyloncotton fabric[J].Polymer Degradation and Stability,2015,122:1-7.
[12]SAHYOUN J,BOUNOR-LEGAR魪V,FERRY L,et al.Synthesis of a new organophosphorous alkoxysilane precursor and its effect on the thermal and fire behavior of a PA66/PA6copolymer[J].European Polymer Journal,2015,66:352-366.
[13]ARUN A,GAYMANS R J.Tri-block copolymers with monodisperse crystallizable diamide segments:Synthesis,analysis and rheological properties[J].Polymer,2008,49(10):2461-2470.
[14]SCHUUR M V D,GAYMANS R J.Influence of morphology on the properties of segmented block copolymers[J].Polymer,2007,48(7):1998-2006.
[15]王斯维,文晨,朱愉洁,等.PVDF/Ti O2复合平板超滤膜的制备与性能研究[J].天津工业大学学报,2010,29(5):1-5.WANG S W,WEN C,ZHU Y J,et al.Preparation and properties of PVDF/Ti O2composite plate ultrafiltration membrane[J].Journal of Tianjin Polytechnic University,2010,29(5):1-5(in Chinese).
[16]安树林,李万春,倪澄峰.聚砜中空纤维超滤膜的微孔结构对初始通量衰减的影响[J].天津工业大学学报,2015,34(2):21-23.AN S L,LIN W C,NI C F.Effect of microporous structure of polysulfone hollow fiber ultrafiltration membrane on initial flux attenuation[J].Journal of Tianjin Polytechnic University,2015,34(2):21-23(in Chinese).