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| Adsorption of Chitosan-guanidine Salt Nanoparticles on Modified Diatomite and Its Application in Antibacterial Paper |
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| DOI： |
| Key Words:diatomite； chitosan； antibacterial paper； antibacterial activity |
| Fund Project:福建省科技计划重大项目（2011H61010032，2012H61010049，2012H0003）；福建省林业厅林业科学技术推广项目(［2013］14-2)；福州市科技局市校科技合作项目（2013-G-81）；福建农林大学科研启动基金（6211C0813）。 |
| Author Name | Affiliation | | 林新兴 | 福建农林大学材料工程学院,福建福州，350002 | | 刘 凯 | 福建农林大学材料工程学院,福建福州，350002 | | 陈礼辉* | 福建农林大学材料工程学院,福建福州，350002 | | 黄六莲 | 福建农林大学材料工程学院,福建福州，350002 | | 曹石林 | 福建农林大学材料工程学院,福建福州，350002 |
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| Abstract: |
| The chitosan-guanidine salt nanoparticles were prepared by ionic gelation method, and the characterization of the nanoparticles was determinated by FT-IR. Meanwhile, the diatomite was modified using the sodium dodecyl sulfate (SDS), and the adsorption of chitosan-guanidine salt nanoparticles on the modified and native diatomite were studied. The results showed that no new peaks were found from the complex of chitosan and guanidine salt, and the characteristic peaks of chitosan only shifted, which indicated that chitosan and guanidine salt were bonded together by physical crosslinking.The adsorption equilibrium time of the nanoparticles on the surface of modified diatomite was estimated to be about 10 min, and the adsorption amount increased when the diatomite was modified. The antibacterial paper was prepared by coating the diatomite absorbed the chitosan-guanidine salt nanoparticles on the surface of base paper. According to the disc diffusion method, the antibacterial paper exhibited remarkable antibacterial activity against Staphylococcus aureus and Escherichia coli. |
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