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Surface characteristics of untreated and modified hemp fibers
Author(s) -
Gulati Deepaksh,
Sain M.
Publication year - 2006
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20465
Subject(s) - inverse gas chromatography , materials science , composite material , fiber , dispersion (optics) , adhesion , cellulose fiber , base (topology) , composite number , molding (decorative) , adhesive , natural fiber , cellulosic ethanol , acetylation , surface energy , matrix (chemical analysis) , cellulose , chemical engineering , chemistry , mathematics , engineering , mathematical analysis , biochemistry , physics , layer (electronics) , optics , gene
Natural cellulosic fibers, including hemp, are increasingly being used for composite reinforcement. However, their poor adhesion with synthetic resins limits their use as reinforcing agent. It is generally accepted that interfacial adhesion can be best described in terms of dispersion forces and acid–base interactions. Therefore, there is a need for quantitative determination of acid–base character of natural cellulosic fibers. In this study, acid–base characteristics and dispersion component of surface energy of hemp fibers have been determined using inverse gas chromatography. Effect of alkalization and acetylation on acid–base characteristics has also been examined. The results indicate that alkalization and acetylation make the hemp fiber amphoteric, thereby improving their potential to interact with both acidic and basic resins. Finally, a parallel is drawn between the changes in fiber‐matrix acid–base interactions and the actual improvement in the mechanical properties of the composites manufactured using resin transfer molding process. POLYM. ENG. SCI. 46:269–273, 2006. © 2006 Society of Plastics Engineers