以新型聚醚酰业胺预聚体一聚酰胺酸为前驱体,在空气中进行预氧化处理后经700℃炭化制备出炭膜.采用红外光谱(FTIR)、元素分析(EA)、X射线衍射(xRD)和气体渗透等测试手段对400℃、460℃和480℃温度下所制预氧化膜的化学结构、炭膜的微结构和气体分离性能进行了表征.结果表明:预氧化阶段,聚合物链发生了热分解和氧化交联反应,温度越高,热分解和氧化程度越高.炭化后,预氧化膜的交联结构演变成无定彤碳结构.预氧化膜的结构差异导致了炭膜的孔结构的不同,从而对炭膜的气体分离性能产生重要影响,其中经460℃预氧化处理后所制炭膜的O2渗透系数可达8.2×10-13(m3(STP)·cm)/(m2·s·Pa),O2/N2选择性达14.1.
参考文献
| [1] | 邱英华,王同华,宋成文,曲新春.热解氛围对聚丙烯腈分离炭膜微结构的影响[J].新型炭材料,2006(02):161-166. |
| [2] | A. F. Ismail;L. I. B. David .A review on the latest development of carbon membranes for gas separation[J].Journal of Membrane Science,2001(1):1-18. |
| [3] | 李新贵,刘睿,黄美荣.炭膜制备及其高效氧氮分离性能[J].新型炭材料,2004(01):69-76. |
| [4] | B. Zhang;T. Wang;S. Zhang .Preparation and characterization of carbon membranes made from poly(phthalazinone ether sulfone ketone)[J].Carbon: An International Journal Sponsored by the American Carbon Society,2006(13):2764-2769. |
| [5] | Lan Ying Jiang;Tai-Shung Chung;Raj Rajagopalan .Dual-layer hollow carbon fiber membranes for gas separation consisting of carbon and mixed matrix layers[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(1):166-172. |
| [6] | De Q. Vu;William J. Koros;Stephen J. Miller .High Pressure CO_2/CH_4 Separation Using Carbon Molecular Sieve Hollow Fiber Membranes[J].Industrial & Engineering Chemistry Research,2002(3):367-380. |
| [7] | Anna Merritt;Ramakrishnan Rajagopalan;Henry C. Foley .High performance nanoporous carbon membranes for air separation[J].Carbon: An International Journal Sponsored by the American Carbon Society,2007(6):1267-1278. |
| [8] | Kim YK;Park HB;Lee YM .Preparation and characterization of carbon molecular sieve membranes derived from BTDA-ODA polyimide and their gas separation properties[J].Journal of Membrane Science,2005(1/2):265-273. |
| [9] | Li YS.;Ding MX.;Xu JP.;Wang XQ. .EFFECTS OF MOLECULAR STRUCTURE ON THE PERMEABILITY AND PERMSELECTIVITY OF AROMATIC POLYIMIDES[J].Journal of Applied Polymer Science,1996(5):741-748. |
| [10] | Ding MX.;Yang ZH.;Li YS.;Zhang J.;Wang XQ.;Li HY. .COMPARATIVE STUDY ON POLYIMIDES FROM 3,3'- AND 4,4'-LINKED DIPHTHALIC ANHYDRIDE[J].Journal of Applied Polymer Science,1996(6):923-930. |
| [11] | TIN P S;CHUNG T S;HILL A J .Advanced fabrication of carbon meolecular sieve memehranes by nonsolvent pretreatment of precursor polymers[J].Industrial and Engineering Chemistry Research,2004,43(20):6476-6483. |
| [12] | SCHINDLER E;MAIER F .Manufacture of porous carbon membranes[P].US 4919860,1990. |
| [13] | CENTENO T A;FUERTES A B .Carbon molecular sieve membranes derived from a phenolic resin supported on porous ceramic tubes[J].Separation and Purification Technology,2001,25(1-3):379-384. |
| [14] | 丁孟贤.聚酰亚胺-化学、结构与性能的关系及材料[M].北京:科学出版社,2006:188-189. |
| [15] | BOP M I;YOUDE M D.Differential Thermal Analysis[M].北京:北京师范大学出版社,1982:138-140. |
| [16] | 耿洪斌,黄培,时钧.聚酰胺酸在不同热处理过程中的热环化[J].高分子材料科学与工程,2005(03):192-195,200. |
| [17] | KURODA S I;MITA 1 .Degradation of aromatic polymers-Ⅱ.The crosslinking during thermal and thermo-oxidative degradation of a polyimide[J].European Polymer Journal,1989,25(06):611-620. |
| [18] | Sing K S W;Everett D H;Haul R A W et al.Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity[J].Pure and Applied Chemistry,1985,57(04):603-619. |
| [19] | Ho Bum Park;Youn Kook Kim;Ji Min Lee;Sun Yong Lee;Young Moo Lee .Relationship between chemical structure of aromatic polyimides and gas permeation properties of their carbon molecular sieve membranes[J].Journal of Membrane Science,2004(1/2):117-127. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%