Starch was extracted from cassava tubers using the wet extraction method. Various formulations were developed and hence optimum quality was obtained. The formulations were produced by gelatinization process and were based on varying the quality of the additives used. The test carried out on the formulations include:- determination of the PH. The PH of the formulated adhesive is 6.8 while is fairly comparable. Solid/moisture content of the formulations are 19.4% and 82.2% respectively and that of standard is 15-30% and 65-85% respectively. The tack time of the formulated adhesive was 16 minutes which is also comparable to the standard which is 15 minutes. Shelf life of the formulated adhesives has exceeded more than two months and it is still suitable showing that it could be equal to the shelf life of market. Finally the wettablility of the formulations were comparable with the wettability of market adhesives.
TABLE OF CONTENTS
Introduction 1
1.1 Scope 3
1.2 Statement of problem 4
1.3 Objectives 4
1.4 Hypothesis 5
1.5 Limitations 5
Literature Review 7
2.1 Classification of adhesives 7
2.2 Molecular structure of starch 27
2.3 Forms of processed starch 29
Materials and method 32
3.1 Materials 32
3.1.2 Method 32
3.1.3 Extraction of starch from cassava 32
3.1.4 Production of adhesive from cassava 33
3.2 Test analysis 34
3.2.1 PH determination 34
3.2.2 Determination of tack time 35
3.2.3 Solid / moisture content determination 35
3.2.4 Wettablilty determination 36
3.2.5 Storage life determination 36
Results 37
4.1.0 PH values 37
4.1.1 Tack time determination 38
4.1.2 Solid and moisture contents 38
4.1.3 Wettability 38
4.1.4 Storage life 39
5.0 Discussion, conclusion and recommendations 40
5.1 Discussion 40
5.2 Conclusion 42
5.3 Recommendation 43
Reference &nb
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