Anti-gnawing bio-polymer composites from non-toxic substances extracted from hot chili pepper

Name: Arnuparb Prasarnsri

keyword: Capsicum oleoresin

LCSH: Biopolymers

; Anti-gnawing

LCSH: Hot peppers

LCSH: Natural pesticides

LCSH: Rodenticides -- Experimentation

LCSH: Repellents

Abstract: This research studied anti-gnawing bio-polymer composites to prevent rodent destroying plastic products with the addition of non-toxic substances. Polybutylene adipate terephthalate (PBAT) and polybutylene succinate (PBS) as a bio-polymer matrix incorporated with capsicum oleoresin (CO) extracted from hot chili pepper providing the burning sensation and denatonium benzoate (DB) giving a bitterest non-toxic substance. The impregnation of CO in the porous of silica was called SiCO. The anti-gnawing bio-polymer composites were prepared by internal mixer and formed the specimens by compression molding machine. The anti-gnawing bio-polymer composites were determined anti-gnawing properties and mechanical properties. The anti-gnawing properties were examined in term of percentage of weight loss. The data was collected for 3 months. The results showed that PBS and PBAT mixed with SiCO and DB can be able to withstand the chewing from rats; however, the increase in SiCO concentration did not significantly improve the anti-gnawing properties and reduce rheological properties and thermal properties. The addition of SiCO did not significantly reduce mechanical properties of the composites. The incorporation of DB/ZnSt reduced rheological properties and thermal stability. The FTIR spectra of materials with a combination of SiCO and DB/ZnST revealed only a minor shift in vibrational frequency for PBAT and PBS Polymer and Polymer composites. The melting temperature (Tm) of PBAT decreased when combined with DB/ZnSt and SiCO, while DB/ZnSt slightly raised the crystallization temperature (Tc). Set B which comprised only SiCO exhibited a significant decrease in Tc. The Tm of all PBS and anti-gnawing samples were not significantly affected. The addition of DB/ZnSt decreased in Tc for PBS, while PBS with SiCO experienced a slight increase in Tc. The incorporation of DB/ZnSt reduced thermal stability and the increase in DB/ZnSt and SiCO loading increased residual char of PBAT and PBS. According to the results of the investigation, the PBAT sample with 12.16 wt% SiCO (II.1) performed the best out of all the PBAT samples. Similarly, for PBS samples sample II.2 was determined to be the most beneficial sample.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Kumpanat Sirivedin

Role: thesis advisor

Email : kumpanat.s@tggs.kmutnb.ac.th

Name: Laongdaw Techawinyutham

Role: thesis advisor

Email : laongdaw.t@eng.kmutnb.ac.th

Created: 2022

Modified: 2567-08-15

Issued: 2024-08-15

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Materials and Production Engineering (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

©copyrights King Mongkut's University of Technology North Bangkok

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