Inventions have evolved and continue to evolve such that after several years of study, research and experimentation reach great developments. With continuing efforts to investigate the constituents of Philippine plants, we have pursued investigation of starch of the cassava plant (Manihot esculenta). Cassava tubers were gathered, ground and squeezed to extract starch. Starch obtained was weighed and divided into three equal parts; 80 grams in T1, T2 and T3.

Treatments also consisted of 60 ml plastic resin glue and resin with 50 grams of flour catalyst for T1, 100 grams for T2 and 150 grams in T3. The components in every treatment were mixed, stirred and then poured in silk screen with oil and then sun-dried. Test for capacity to carry weight indicated T3 as the best. For its ability to hold water, all products passed but for biodegradability, T1 gave the best results. The tensile and bending properties had been tested using the Universal Testing Machine and Analysis showed that T3 had the greatest tensile strength while T2 had the greatest bending property. Using ANOVA single Factor, results showed that there was significant difference among the three treatments in bending and tensile strength. However, for biodegradability test there was no significant difference. The final phase of the study determined the effectiveness of cassava starch as component of biodegradable plastic. Results confirmed that cassava starch is ideal as tests proved its worth.

Materials & Equipment

Further clarification of the procedures and results should be directed to the researchers and adviser.

Researchers:
Daryl S Romero
Mary Ann L. Tinaja
Clarissa L. Cachero

Adviser:
Gregor Burdeos
Bayugan National Comprehensive High Shool
Bayugan, Agusan Del Norte