1. 对聚乙烯亚胺交联 PEI 性能的研究 付长欣 2013.5.13 研究报告

2. PETIM （ polyethyleneimine ） modification significantly influences NF performance through the mechanisms of size exclusion, charge repulsion, and solute membrane a ffi nity. Specifically, after PETIM induced cross-linking, the membrane pore size is significantly reduced. The membrane surface becomes more hydrophilic and positively charged. As a result of these synergic e ff ects, the rejection of ciprofloxacin is substantially enhanced. 1.Sun, S.P., T.A. Hatton, and T.S. Chung, Hyperbranched polyethyleneimine induced cross-linking of polyamide-imide nanofiltration hollow fiber membranes for effective removal of ciprofloxacin. Environ Sci Technol, 2011. 45(9): p. 4003-9.

3. The membrane surface becomes more hydrophilic and positively charged. As a result of these synergic e ff ects, the rejection of ciprofloxacin is substantially enhanced. Furthermore, experimental results show that the molecular weight of PETIM has tremendous e ff ect on NF performance of the as-modified membrane. The NF membrane modified by a high molecular weight PETIM_60K exhibits the highest rejection, the lowest fouling tendency, and keeps a constant flux over the whole pH range.

4. scanning electron microscope ATR-FTIR XPS contact angles 表征手段

5. 聚乙烯亚胺

6. 2.Dutczak, S.M., et al., “Chemistry in a spinneret” to fabricate hollow fibers for organic solvent filtration. Separation and Purification Technology, 2012. 86: p. 183-189.

7. PEI 和聚乙烯亚胺

8. 文献 1 Poly(ether imide) Membranes Modified with Poly(ethylene imine) as Potential Carriers for Epidermal Substitutes, Macromol. Biosci. 2006, 6, 274–284 将 PEI 膜置于含 PEITIM 的异丙醇水溶 液中。

9. 文献 2 Amination of Poly(ether imide) Membranes Using Di- and Multivalent Amines, Macromol. Chem. Phys. 2003, 204, No. 3 poly(ethylene imine)s with different molecular weight (Mw,750 kg/mol;Mw,0.8 kg/mol)

10. 工作计划 1. 查阅市场上可购买到的聚乙烯亚胺 （不同分子量） 2. 探究实验方案，用不同分子量的聚 乙烯亚胺交联 PEI ，并研究交联后其 性能的变化

11. Thank you !