8. Conclusions and Further Work
8.2. Further Work
If more time was available or this project was further extended it would potentially be a good idea to look into combinations of modification of the PVPA coating with an additional top coating, particularly those which proved most effective on their own. Good combinations for potential further study would be PVPA-Ch 10% with TEOS top coat, PVPA-Ch 10% with cellulose acetate top coat, PVPA-MgO 1% with TEOS top coat and PVPA-MgO 1% with cellulose acetate top coat. This could also be expanded into further combinations with other coatings that performed well, such as the other chitosan and magnesium oxide containing coatings.
It would also be beneficial to look into more effective ways of adhering cellulose acetate to the surface of the PVPA coating, due to the less than ideal tape pull test results and given the impressive water soak resistance of this coating. This could potentially be done using atmospheric plasma to activate the surface groups, or perhaps through some kind of surface etching using sandpaper as previously used to help the PVPA coating adhere to the surface of the substrate. If this gave an improvement in the adherence of the cellulose acetate to the PVPA then it could potentially have a very positive effect on the overall water soak test results, especially if this was then combined with one of the modified coatings with good water soak and cone calorimeter testing performance.
180
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