| 摘要: |
| 采用戊二醛作为交联剂与壳聚糖进行交联,以提高壳聚糖/ 纳米TiO2 膜的抗水性。采用三元二次通用旋转组合设计实验方法,建立了力学性能、吸水率与戊二醛用量、交联时间、TiO2 溶胶添加量的二次回归数学模型,得出了制备戊二醛改性壳聚糖/ 纳米TiO2 膜的最佳工艺条件为交联剂用量0. 10 g/ (100 mL)乙酸溶液,交联时间4. 37 h,TiO2 溶胶添加量0. 08 mL/ (100 mL)的乙酸溶液。上述条件下得到的膜的拉伸强度为5. 69MPa,吸水率为133. 66%。与壳聚糖/ 纳米TiO2 膜相比,吸水率下降了72. 8%。 |
| 关键词: 抗水性 复合膜 戊二醛改性 纳米TiO2 壳聚糖 |
| DOI： |
| 分类号:TB484. 3; TB487 |
| 基金项目:中央高校基本科研业务费专项资金资助(YX2011-2); 北京林业大学大学生创新创业训练计划(120505) |
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| Water Resistance of Chitosan / nano-sized TiO2 Complex Film Modified by Glutaraldehyde |
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HUANG Xi-yan, FANG Jian
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Beijing Forestry University, Beijing 100083, China
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| Abstract: |
| Chitosan/ nano-sized TiO2 film can be used as a preservative film, but its water resistance needs to be improved. Glutaraldehyde was used as crosslinking agent and crosslinks with chitosan to improve the water resistance of chitosan/ nano-sized TiO2 film. Quadratic regression mathematical model of mechanical properties, water absorption rate with the amount of glutaraldehyde, crosslinking time, and adding amount of TiO2 sol was established using quadratic general rotary design experimental method. The optimum process conditions for preparation of chitosan/ TiO2 nanometer films was obtained, which is cross-linked by glutaraldehyde as crosslinking agent 0. 10 g/ (100 mL) acetic acid solution, cross-linking time 4. 37 h, adding amount of TiO2 sol 0. 08 ml/ (100 mL) acetic acid solution. The tensile strength obtained under this condition is 5. 69 MPa, water absorption rate is 133. 66%. Its water absorption rate is decreased by 72. 8% compared with chitosan/ nano-sized TiO2 film. |
| Key words: water resistance complex film glutaraldehyde modificatiob nano-TiO2 chitosan |
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