Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : corn starch

A Study of the Effect of Starch Content on the Water Absorption of PVA/starch Blends

Bushra H. Musa; Nahida J. Hameed

Engineering and Technology Journal, 2021, Volume 39, Issue 1B, Pages 150-158
DOI: 10.30684/etj.v39i1B.1921

The present work aims to study physical tests such as the water absorption tests of PVA; PVA/corn starch blends at different mass percent (25, 30, 35, 40, and 50%) of corn starch after immersion in distilled water for ten minutes. The blends were also characterized by FTIR analysis, and an optical microscope. Casting method used to prepare samples. The results of water absorption exhibited that the weight losses of the sample increases the starch content rises in the PVA matrix. Also, it was found the highest value of the swelling ratio % at (50% PVA /50% Starch) blend, while minimum values of the swelling ratio % at (75%PVA /25%Starch) blend and pure PVA film.
It was observed from optical microscope that the starch granules disperse well at 25 and 30 wt.% of the starch in the blend films. Nevertheless, clustering could be observed in the polymer blend at 35, 40, and 50 wt.% of starch component. It was shown that porous and spherical voids after the samples were immersed in distilled water.

Effect of TiO2 Nanoparticles on Water absorption and shrinkage of the PVA/CS Blend and PVA/CS nanocomposites thick Films

Harith Ibrahim jaafer; Abeer Mohamad Abed

Engineering and Technology Journal, 2015, Volume 33, Issue 7, Pages 1232-1243

In this paper the effect ofaddition0.2,0.4,0.6,0.8,1gofTitanium oxide (TiO2)Nanoparticles inwater absorption, dimensions change and thickness for Polyvinyl alcohol (PVA)/Corn Starch(CS)10g/10g blend and PVA/CS/TiO2 thick films have been studied. Films were prepared using solution casting method. Films were immersing in water for 60 days. The results show that, the water absorption and dimensions change decrease with increasing nanoparticles content, but thickness increase with increasing nanoparticles after immersion, also weightlosing, dimensions change and thickness were found after drying. The results show that the weightlosing, dimensions change decrease with increasing nanoparticles, reducing in thickness increase with increasing nanoparticles