以聚邻苯二甲酸-1,6-己二醇酯二醇(PH-56)为软段,异佛尔酮二异氰酸酯(IPDI)、1,4-丁二醇(BDO)和乙二胺(EDA)为硬段,合成了系列软段中含有苯环结构的苯酐聚酯型水性聚氨酯(WPU)膜.并采用傅里叶变换红外光谱(FTIR)、热重分析(TGA)等对膜进行了表征.对于苯/环己烷混合液(质量比50/50,50℃),测定膜的吸附分离性能和渗透汽化分离性能,并与软段不合苯环的聚己二酸-1,6-己二醇酯二醇(PHA-2000)的脂肪族聚酯型水性聚氨酯膜进行了比较.结果表明,含有苯环结构的PH-56为软段的膜比PHA-2000为软段的膜热稳定性和分离性能更好;软段为PH-56的膜在环己烷中几乎不溶胀,且当膜结构中软段质量分数从55.0％增加到73.6％时,渗透汽化分离因子从6.90缓慢减小为4.91,而通量从6.91 kg·μm/(m2·h)明显增加到23.8 kg·μm/(m2·h).
A series of waterborne polyurethane membranes with different kinds of soft segments of different contents were successfully synthesized using polyphthalic acid-1,6-glycol polyester diol (PH-56) or polyhexamethylene adipate glycol (PHA-2000) as soft segment,butanediol (BDO) and ethanediamine (EDA) as hard segment.The membranes were characterized by FT-IR,TGA,adsorption and pervaporation performance for benzene/cyclohexane (50/50 in weight) in order to probe the influence of content of benzene ring structure in soft segment.The results indicated that thermal stability and selectivity of PH-based membrane were better than those of PHA-based membrane.When the content of PH-56 increased from 55.0％ to 73.6％,the degree of swelling increased gradually,the permeation flux rapidly increased from 6.91 kg · μm/(m2 · h) to 23.8 kg · μm/(m2 · h),separation factor slowly decreased from 6.90 to 4.91 and almost no swelling in cyclohexane.
参考文献
| [1] | Li JD.;Chen CX.;Han BB.;Peng Y.;Zou J.;Jiang WJ..Laboratory and pilot-scale study on dehydration of benzene by pervaporation[J].Journal of Membrane Science,20021/2(1/2):127-136. |
| [2] | 叶宏;李继定;林阳政;陈剑;陈翠仙.PEA型聚氨酯膜的制备及渗透汽化苯/环己烷的分离性能[J].高分子材料科学与工程,2009(3):103-106. |
| [3] | Gorrasi G;Tortora M;Vittoria V.Synthesis and physical properties of layered silicates/polyurethane nanocomposites[J].Journal of Polymer Science, Part B. Polymer Physics,200518(18):2454-2467. |
| [4] | Beth A.Miller-Chou;Jack L.Koening.A review of polymer dissolution[J].Progress in Polymer Science,20038(8):1223-1270. |
| [5] | Wolinska-Grabczyk A.Effect of the hard segment domains on the permeation and separation ability of the polyurethane-based membranes in benzene/cyclohexane separation by pervaporation[J].Journal of Membrane Science,20061/2(1/2):225-236. |
| [6] | An QF;Qian JW;Zhao Q;Gao CJ.Polyacrylonitrile-block-poly(methyl acrylate) membranes 2: Swelling behavior and pervaporation performance for separating benzene/cyclohexane[J].Journal of Membrane Science,20081/2(1/2):60-67. |
| [7] | Lu LY;Sun HL;Peng FB;Jiang ZY.Novel graphite-filled PVA/CS hybrid membrane for pervaporation of benzene/cyclohexane mixtures[J].Journal of Membrane Science,20061/2(1/2):245-252. |
| [8] | 刘兵兵;曹义鸣;李雄岩;贺晓泉;劳景水;吴志明;袁权.聚乙烯醇/壳聚糖共混膜渗透汽化性能研究[J].膜科学与技术,2007(4):37-41. |
| [9] | 叶宏;李继定;林阳政;陈剑;陈翠仙.聚氨酯脲和聚氨酯酰亚胺膜的制备与渗透汽化芳烃/烷烃分离性能研究[J].膜科学与技术,2009(2):40-46. |
| [10] | Wang HY.;Tanaka K.;Kita H.;Okamoto KI.;Lin X..Preparation of plasma-grafted polymer membranes and their morphology and pervaporation properties toward benzene/cyclohexane mixtures[J].Journal of Polymer Science, Part A. Polymer Chemistry,199813(13):2247-2259. |
| [11] | Yamasaki A.;Mizoguchi K.;Shinbo T..PERVAPORATION OF BENZENE/CYCLOHEXANE AND BENZENE/N-HEXANE MIXTURES THROUGH PVA MEMBRANES[J].Journal of Applied Polymer Science,19976(6):1061-1065. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%