PRODUCTION OF STARCH-BASED ADHESIVE FROM CASSAVA
ABSTRACT
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
CHAPTER ONE
Introduction                                                                                     1
1.1    Scope                                                                                    3
1.2    Statement of problem                                                             4
1.3    Objectives                                                                               4
1.4    Hypothesis                                                                                       5
1.5    Limitations                                                                                       5
CHAPTER TWO
Literature Review                                                                             7
2.1    Classification of adhesives                                                     7
2.2    Molecular structure of starch                                                 27
2.3    Forms of processed starch                                                    29
CHAPTER THREE
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
CHAPTER FOUR
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
CHAPTER FIVE
5.0    Discussion, conclusion and recommendations                      40
5.1    Discussion                                                                             40
5.2    Conclusion                                                                             42
5.3    Recommendation                                                                    43
Reference
