Change search
ReferencesLink to record
Permanent link

Direct link
Studies on mechanical properties of wood fiber reinforced cross-linked starch composites made from enzymatically degraded allylglycidyl ether-modified starch
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Biocomposites.
2010 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, Vol. 41, no 10, 1409-1418 p.Article in journal (Refereed) Published
Abstract [en]

In a previous work we introduced a new family of thermoset composites of softwood fiber and allylglycidyl ether modified potato starch (AGE-starch with a degree of substitution of 1.3 and 2.3) prepared by hot pressing. To improve the processability of AGE-starch with a DS = 1.3 (LDS-3) and to increase hygromechanical properties, the LDS-3 matrix has now been partially degraded by a-amylase at 45 degrees C (pH 6) for 0.5, 6 and 18 h. The study shows that already a 30 min enzymatic hydrolysis has a marked effect on the modified starch molecular weight and its thermal properties. The new composites with enzyme hydrolyzed AGE-starch, generically named D-LDS-3, showed good fiber dispersion and excellent interface between the fiber and matrix as studied by SEM. Premixes of D-LDS-3 matrix and fiber showed improved processability. The water vapor absorption was evaluated at 43.2% and 82.2% RH and the stiffness and strength properties were measured. The water uptake was shown to be reduced. The strength of neat matrix D-LDS-3-6 at ambient 68% RH reached 63 MPa and Young's modulus 3200 MPa and with 40 wt.% wood fiber reinforcement impressive 128 MPa and 4500 MPa, respectively.

Place, publisher, year, edition, pages
2010. Vol. 41, no 10, 1409-1418 p.
Keyword [en]
Starch/fiber composite, Cross linked, Mechanical testing, Moulding compounds
National Category
Chemical Engineering
URN: urn:nbn:se:kth:diva-26695DOI: 10.1016/j.compositesa.2010.05.018ISI: 000281945800009ScopusID: 2-s2.0-78049420981OAI: diva2:373095
QC 20101130Available from: 2010-11-30 Created: 2010-11-26 Last updated: 2010-11-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Gamstedt, E. Kristofer
By organisation
In the same journal
Composites. Part A, Applied science and manufacturing
Chemical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 35 hits
ReferencesLink to record
Permanent link

Direct link