Date of Award
Spring 5-13-2023
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Chemistry
First Advisor
Dr. Ram K. Gupta, rgupta@pittstate.edu
Second Advisor
Dr. Khamis Siam, ksiam@pittstate.edu
Third Advisor
Dr. Timothy Dawsey, tdawsey@pittstate.edu
Fourth Advisor
Dr. John Franklin, jfranklin@pittstate.edu
Keywords
Sunflower oil, Adhesive, Bio-based, Fillers, Bonding strength, polyol
Abstract
Petroleum-based compounds are generally utilized in industries for getting higher mechanical strength for wood application, where the process of synthesis releases toxins into the environment and causes health issues.
Because of this, scientists are trying to make biobased compounds and products. In this research, sunflower polyol was used to make polyurethane (PU) resin. For the formation of polyol, an epoxidation reaction followed by a ring-opening reaction was performed. The presence of hydroxyl groups was confirmed using Fourier transform infrared spectroscopy (FT-IR) and hydroxyl value determination test to confirm the polyol formation. After that, hydroxyl groups of polyol were reacted with diisocyanate to synthesize polyurethane.
Two different techniques were used to cure the adhesive for wood samples. In the first set of samples, heat and pressure were applied simultaneously via hot press for a certain time; after that, samples were placed at room temperature for 24 hours.
For the second set, samples were cured with a manual clamping technique at room temperature for 24 hours. With the hot-press technique, variations in time and temperature were done to find ideal conditions and highest tensile strength. Adhesion properties were observed with tensile strength testing. The highest tensile strength was observed to be 5.66 MPa without the addition of any filler. Furthermore, silicon dioxide (SiO2), microcrystalline cellulose (MCC), and titanium dioxide (TiO2) were introduced as fillers to improve bonding strength. With the introduction of SiO2, TiO2, and MCC filler, an 86.25%, 27.14%, and 34.15% improvement in adhesive strength was observed, respectively. Apart from that, other characterizations were also done with the help of thermogravimetric analysis (TGA), FTIR, and gel permeation chromatography (GPC) for the analysis of the prepared samples.
Recommended Citation
Chaudhari, Arjun, "Sunflower Oil-Based Wood Adhesive With High Mechanical Strength And Enhanced Bonding By Introducing Fillers" (2023). Electronic Theses & Dissertations. 444.
https://digitalcommons.pittstate.edu/etd/444
