A novel antibacterial material （L-PET） was prepared by immobilizing ε-polylysine on polyethylene terephthalate （PET） nonwoven fabrics. Surface modifications of the fabric were performed by using a chemical modifi...A novel antibacterial material （L-PET） was prepared by immobilizing ε-polylysine on polyethylene terephthalate （PET） nonwoven fabrics. Surface modifications of the fabric were performed by using a chemical modification procedure where carboxyl groups were prepared on the PET surface, a coupling agent was grafted, and the ε-polylysine was immobilized. Scanning electron microscopy （SEM） was used to analyze the surface morphology of the fabrics, while the toluidine blue method and X-ray photoelectron spectroscopy （XPS） were used to evaluate the grafting densities. The antibacterial activities of the L-PET were investigated by using the shaking-flask method. The electron micrographs showed that the surface of the blank PET and the modified fabrics did not change. The results of XPS analysis confirmed that ε-polylysine was successfully grafted onto the surface of PET. The results of the antibacterial experiments showed that L-PET fabrics had excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, and that L-PET fabrics were stable in storage for at least two years.展开更多
本文通过在聚丙烯腈隔膜中植入PET无纺布提高了隔膜的热稳定性和力学性能,通过添加PEGDMA进行热交联提高了PAN的耐化学腐蚀性和降低PAN的结晶度,PEGDMA同时有利于提高PAN多孔膜的孔隙率,PAN通过倒相法成孔,制备出了孔隙率高达43.38%、...本文通过在聚丙烯腈隔膜中植入PET无纺布提高了隔膜的热稳定性和力学性能,通过添加PEGDMA进行热交联提高了PAN的耐化学腐蚀性和降低PAN的结晶度,PEGDMA同时有利于提高PAN多孔膜的孔隙率,PAN通过倒相法成孔,制备出了孔隙率高达43.38%、离子电导率高达1.56m S cm-1的锂电池隔膜,经150℃高温测试隔膜的热收缩率均低于5%,经过2h以及12h离子电导率对比发现经过热交联的锂电池隔膜的耐腐蚀性增强。展开更多
基金Funded by the National Major Science & Technology Specific Projects (2009ZX10004-703)
文摘A novel antibacterial material （L-PET） was prepared by immobilizing ε-polylysine on polyethylene terephthalate （PET） nonwoven fabrics. Surface modifications of the fabric were performed by using a chemical modification procedure where carboxyl groups were prepared on the PET surface, a coupling agent was grafted, and the ε-polylysine was immobilized. Scanning electron microscopy （SEM） was used to analyze the surface morphology of the fabrics, while the toluidine blue method and X-ray photoelectron spectroscopy （XPS） were used to evaluate the grafting densities. The antibacterial activities of the L-PET were investigated by using the shaking-flask method. The electron micrographs showed that the surface of the blank PET and the modified fabrics did not change. The results of XPS analysis confirmed that ε-polylysine was successfully grafted onto the surface of PET. The results of the antibacterial experiments showed that L-PET fabrics had excellent antibacterial activity against Escherichia coli and Staphylococcus aureus, and that L-PET fabrics were stable in storage for at least two years.
文摘本文通过在聚丙烯腈隔膜中植入PET无纺布提高了隔膜的热稳定性和力学性能,通过添加PEGDMA进行热交联提高了PAN的耐化学腐蚀性和降低PAN的结晶度,PEGDMA同时有利于提高PAN多孔膜的孔隙率,PAN通过倒相法成孔,制备出了孔隙率高达43.38%、离子电导率高达1.56m S cm-1的锂电池隔膜,经150℃高温测试隔膜的热收缩率均低于5%,经过2h以及12h离子电导率对比发现经过热交联的锂电池隔膜的耐腐蚀性增强。
