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Production of Adhesive from Cassava Starch in Owerri, Imo State, Nigeria

100%

Chukwuemeka I. S. , Ugochukwu I. W.

World News of Natural Sciences

2017

tom 11

5-10

In this work, the potentials of adhesives production from cassava starch were investigated. An adhesive product produced from Manihot utilissima was compared with a commercially available adhesive. Improvements in the properties of the cassava-based adhesive were achieved by investigating the effects of temperature and the addition of a viscosity enhancer/stabilizer (borax) on the density of the produced adhesive. The results obtained provide a wide range of insight into the production potentials of using cassava starch as a raw material in the production of large scale adhesives.

Isolation of starch from acha grain (Digitaria exilis (Kippist) Stapf), modification, characterization and application of benzoylated starch in stabilization of oil in water emulsion

88%

Ajayi M. A. , Lawal O. S. , Bassey E. A. , Oyebanji O. M. , Onyemerem C. T. , Ikeri P. O. , Peters S. I. , Mounford D. B.

World News of Natural Sciences

2025

tom 58

194-208

Starch and its derivatives are biocompatible, biodegradable, non-toxic with applications in food, pharmaceutical and allied industries. In this study, starch was isolated from acha grain (Digitaria exilis (Kippist) Stapf). Esterification of starch was carried out using benzoyl chloride at room temperature (30 °C ± 2 °C). Characterization of native and benzoylated starch were achieved by FT-IR and XRD analyses. Emulsifying properties of native and benzoylated starch were reported. FT-IR spectra of native modified revealed the broad absorption bands at 3375.70 cm-1 was due to stretching hydrogen bonded O-H groups in the starch. However, for the modified starch, the major new absorption bands at 1600.92 cm-1 which is associated with C=O esters indicating the modification of the native starch confirms that esterification took place in the starch molecules and the band in the region 1716.65 cm-1 confirms the water adsorption. The X-Ray diffraction pattern of native and acetylated starch samples prominent peaks (2) at 18.08 and 19.02 respectively. After acetylation, slightly reduction in crystallinity was observed. The loss of crystallinity would mean enhanced ability for acetylation starch or other polymer products made from it to absorb water. The native and benzylated starch significantly enhanced the stability of water of oil water emulsion.

Thermal behavior and kinetic decomposition of sweet potato starch by non-isothermal procedures

75%

Liu Y. , Yang L. , Zhang Y. , Liu Y. , Yang L. , Zhang Y.

Investigation of the effect of thermal stress on the interface damage of hybrid biocomposite materials

51%

Sadat S. , Mokaddem A. , Doumi B. , Berber M. , Boutaous A.

Mechanics and Mechanical Engineering

2019

tom Vol. 23, nr 1

253--258

In this paper, we have studied the effect of thermal stress on the damage of fiber-matrix interface of a hybrid biocomposite composed of two natural fibers, Hemp, Sisal, and Starch matrix. Our genetic modeling used the nonlinear acoustic technique based on Cox’s analytical model,Weibull’s probabilistic model, and Lebrun’s model describing the thermal stress by the two coefficients of expansion. The stress applied to our representative elementary volume is a uni-axial tensile stress. The numerical simulation shows that the Hemp-Sisal/Starch hybrid biocomposite is most resistant to thermal stresses as compared with Hemp/Starch biocomposite. It also shows that hybrid biocomposite materials have a high resistance to applied stresses (mechanical and thermal) compared to traditional materials and biocomposite materials. The results obtained in our study coincide perfectly with the results of Antoine et al., which showed through experimental tests that natural fibers perfectly improve the mechanical properties of biocomposite materials.