Surface Chemical Composition and Mechanical Properties of Kraft Pulp Investigated by Xps and Pca

Science Direct Working Paper No S1574-0331(04)70880-2

4 Pages Posted: 7 Jun 2017 Last revised: 20 Jan 2018

See all articles by Pedro Fardim

Pedro Fardim

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

Nelson Durán

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

Date Written: September 2002

Abstract

The relations between surface chemical composition and mechanical properties for unbleached kraft eucalypt pulp were investigated using XPS and Principal Component Analysis.PCA was first employed to treat a matrix containing surface and pulp chemical composition data. The loading plot versus PC1 and PC2, that explained 92.7 % and 5.6 % of the variation, respectively; showed relation between xylan, uronic acid and carbohydrate surface coverage. Surface coverage of lignin was related with total lignin content. A second matrix containing surface chemical composition and mechanical properties was treated and two principal components explaining 76.4 % and 19.4 % of variation were identified. The loading plot versus PC1 and PC2 showed relations between surface coverage of lignin and tear index. Surface coverage of carbohydrate and extractives were related with elastic modulus, breaking length, tensile and burst strength. Tear index showed no relation with elastic modulus. Lignin surface coverage can probably affect the energy dissipation in the tearing test conditions.

Keywords: Macromolecular Chemistry > Colloid and Surface Chemistry, macrochem/0209001

Suggested Citation

Fardim, Pedro and Durán, Nelson, Surface Chemical Composition and Mechanical Properties of Kraft Pulp Investigated by Xps and Pca (September 2002). Science Direct Working Paper No S1574-0331(04)70880-2, Available at SSRN: https://ssrn.com/abstract=2981246

Pedro Fardim (Contact Author)

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica ( email )

C.P. 6154
13083-970
Brazil

Nelson Durán

Universidade Estadual de Campinas (UNICAMP) - Instituto de Quimica

C.P. 6154
13083-970
Brazil

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