Surface- and bulk-modified galactoglucomannan hemicellulose films and film laminates for versatile oxygen barriers

被引:115
作者
Hartman, Jonas [1 ]
Albertsson, Ann-Christine [1 ]
Sjoberg, John [1 ]
机构
[1] Royal Inst Technol, Sch Chem Sci & Engn, SE-10044 Stockholm, Sweden
关键词
D O I
10.1021/bm060129m
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The objective of this study was to create oxygen barrier films based on the hemicellulose O-acetylgalactoglucomannan (AcGGM) that show high resistance toward moisture-rich conditions. We have applied Williamson benzylation, a classic derivatization method of carbohydrates, as well as two different methods for surface grafting, and, finally, lamination of unmodified hemicellulose films with the synthesized hydrophobic benzylgalactoglucomannan (BnGGM). It was found that the thermoplastically behaving BnGGM could form independent transparent and strong films that were easy to handle. As expected, their resistance toward water was very high, and the oxygen barrier properties showed drastically lower sensitivity toward moisture than films from the corresponding unmodified material. The surface grafting and lamination methods were approached in order to try and combine excellent barrier properties with moisture tolerance. It was found that the grafting methods applied had a positive effect in this direction; however, lamination turned out to be an even more promising option.
引用
收藏
页码:1983 / 1989
页数:7
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