Cellulose bromo-isobutyl ester was prepared using filter paper as raw material through esterification reaction with 2-Bromoisobutyryl bromide (BIBB) in N, N-Dimethyl-formamide (DMF). Cellulose esters with different degree of substitution were obtained. FTIR result indicated the successful introduction of bromo isobutyryl group in cellulose to obtain cellulose ester (Cell-Br). The surface of modified filter paper become rough and grooves could be observed by SEM. The thermal stability of the cellulose ester decreased in comparison with unmodified filter paper. Besides, the hydrophobicity of the filter paper was improved and the water contact angle increased from 73.4° to 116.5° with increasing degree of substitution. The water vapor barrier property was improved by 26 %. Furthermore, it was also found the modified filter paper possessed antibacterial activity against S. aureus bacteria. The modified filter paper obtained could be potentially used in food packaging fields and the results provide a simple method to prepare functional filter paper.

中文翻译：

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基于滤纸的纤维素溴代异丁酯的制备与表征

以滤纸为原料，通过与2-溴异丁酰溴（BIBB）在N，N-二甲基甲酰胺（DMF）中进行酯化反应，制备纤维素溴代异丁酯。获得具有不同取代度的纤维素酯。FTIR结果表明将溴异丁酰基成功地引入纤维素中以获得纤维素酯（Cell-Br）。改性滤纸的表面变得粗糙并且可以通过SEM观察到沟槽。与未改性的滤纸相比，纤维素酯的热稳定性降低。此外，随着取代度的增加，滤纸的疏水性得到改善，并且水接触角从73.4°增加到116.5°。水蒸气阻隔性提高了26％。此外，还发现改性滤纸对金黄色葡萄球菌具有抗菌活性。获得的改性滤纸可潜在地用于食品包装领域，其结果提供了制备功能性滤纸的简单方法。