涂布型食品防油防溶剂纸的制备与表征

Preparation and Characterization of Grease-proof and Solvent-proof Food Wrapper

中文关键词: 纳米纤维素  壳聚糖  防油  阻隔  涂布量

英文关键词: nanocellulose  chitosan  grease-proof  block  coating amount

中文摘要:

      目的 研究纳米纤维素和壳聚糖作为防油剂对纸张防油防溶剂效果的影响。方法 将Tempo氧化法制备的纳米纤维素悬浮液与壳聚糖醋酸溶液分别涂布到A4纸上进行对比，探究不同涂布量对纸张防油防溶剂的效果及纸张性能的影响。结果 实验结果表明，同一涂布量下纳米纤维素涂布纸的防油等级稍差于壳聚糖涂布纸。随着纳米纤维素涂布量增加到4.9 g/m2，纸张阻隔气体的能力得到不断增强，即透气度降低至0。同时纸张防油等级也在增强，并可达到防油最高等级（12级），且具有防热油的效果，研究还发现纸张具有防溶剂的效果。结论 壳聚糖和纳米纤维素涂布纸虽不具有疏油性，但壳聚糖和纳米纤维素在纸张表面形成致密的膜，其阻隔了油脂和溶剂对纸张的渗透。

英文摘要:

      The work aims to study the effect of nanocellulose and chitosan as grease-proof agents on the grease-proof and solvent-proof properties of the paper. The nanocellulose suspension prepared by Tempo oxidation method, which was compared with chitosan acetic acid solution, was coated on A4 paper to study the effects of different coating amounts on paper's grease and solvent prevention and its properties. The experimental results showed that the grease-proof level of nanocellulose coated paper was slightly worse than that of chitosan coated paper under the same coating amount. As the nanocellulose coating amount increased to 4.9 g/m2, the paper's ability to block gas was continuously enhanced. That is, the air permeability was reduced to 0, and the paper's grease-proof level was also elevated to 12. It was found that the paper could prevent hot oil and be used as dissolution-resistant agent. Though Chitosan and nanocellulose coated paper is not oleophobic, the dense film on the surface of the paper formed by chitosan and nano-cellulose blocks the penetration of oil and solvent into the paper.