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Affiliation(s)

1. Forest Biotechnology Division, Forest Research Institute Malaysia, Kepong 52109, Selangor, Malaysia
2. Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
3. Faculty of Applied Science, Universiti Teknologi MARA, Shah Alam 40540, Selangor, Malaysia
4. Chemistry Department, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia

ABSTRACT

A long chain insect pheromone for subterranean termites, LC (Lignoceric Acid), was intercalated into the inorganic interlayer, ZLH (Zinc Layered Hydroxide), resulting in the formation of a new nanohybrid, labelled as LCN (Lignocerate Nanohybrid). The formation of this inorganic-organic structure nanohybrid was synthesized by the co-precipitation method using ZnO (Zinc Oxide) as the starting material. The PXRD (Powder X-Ray Diffraction) results confirmed the intercalation process although the diffraction patterns of the resultant nanohybrid and the unbound pheromone were fairly similar but both have different basal spacings values. The FTIR (Fourier Transform Infrared) profiles and the chemical composition test supported the intercalation process with the percentage loading of LC into ZLH calculated to be 85%. The thermal stability of the free anion, LC was enhanced when it was transformed into LCN, increasing from 257 °C to 352 °C. The release of LC from the nanohybrid behaved in a sustained manner, governed by the pseudo-second order kinetic model with higher release of LC in sodium carbonate solution than the pH aqueous media. The synthesized nanohybrid was found to be safe for plant germination when the two seed types were successfully germinated in all the tested nanohybrid concentrations. However, the percentage seed germination and the radical seed length from the nanohybrid showed lower values compared to its counterpart anion, LC.

KEYWORDS

Insect pheromone, ZLH, ZnO, controlled release, termite.

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