Structure of Phosphate Amphoteric Cassava Starch and its Reinforcing Effect on Secondary Fiber

De De Yu; Hong Wei Zhang

doi:10.4028/www.scientific.net/AMR.549.87

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 549Structure of Phosphate Amphoteric Cassava Starch...

Structure of Phosphate Amphoteric Cassava Starch and its Reinforcing Effect on Secondary Fiber

Abstract:

In the present work, a series of the phosphate amphoteric cassava starch was synthesized by a two-step semi-dry process with 3-chloro-2-hydroxypropyltrimethyl ammonium chloride (CTA) as the cationic reagent and phosphate mixture as the anionic reagent. The structure of the amphoteric starch was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The reinforcing effects of the amphoteric starch on the secondary fiber were also studied. The results indicated that the reaction occurred not only on the surface but also in the interior of starch granule, not only in the amorphous region, but also in the crystalline region. All the amphoteric starch showed reinforcing effect on the secondary fiber. The No. 5 sample showed better reinforcing effects on paper strength due to its higher total degree of substitution (0.095), proper DSA/DSC ratio (DSC=0.067, DSA=0.028) and interior modification of the starch granule. Compared with the control sample, the secondary fiber paper with 1.0 wt% (relative to dried pulp) of No.5 phosphate amphoteric starch showed 25.6%, 21.4% and 29.4% increases in tensile index, tearing index, and burst index, respectively.

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Periodical:

Advanced Materials Research (Volume 549)

Pages:

87-91

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.549.87

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Online since:

July 2012

Authors:

De De Yu, Hong Wei Zhang

Keywords:

Amphoteric Starch, Paper, Reinforcing Effect, Secondary Fiber, Structure

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