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Guests Look at the Food Table
No full textAngel Abshire and Olive Sullivan peruse the food tablehttps://digitalcommons.pittstate.edu/nellydonlecture/1018/thumbnail.jp
Apron Model
No full textModel walking down the runway (the aisle between guest seats) showcasing the Handy Dandy Apron.https://digitalcommons.pittstate.edu/nellydonlecture/1027/thumbnail.jp
Audience Candid
No full textCandid photo of the guests at the lecturehttps://digitalcommons.pittstate.edu/nellydonlecture/1039/thumbnail.jp
Audience Candid
No full textCandid photo of the guests at the lecturehttps://digitalcommons.pittstate.edu/nellydonlecture/1040/thumbnail.jp
Handy Dandy to the Rescue
No full textMarla Day presenting at the lecture, a slide with a photo of Nelly Don\u27s apron titled Handy Dandy to the Rescue! is on the screenhttps://digitalcommons.pittstate.edu/nellydonlecture/1071/thumbnail.jp
Marla Taking Photo
No full textMarla Day taking photos at the DeGruson lecturehttps://digitalcommons.pittstate.edu/nellydonlecture/1106/thumbnail.jp
Rafael & Brent
No full textBrent McDowell, Archival Assistant, and Rafael Almeida, Graduate Assistant, sit at tables during the lecturehttps://digitalcommons.pittstate.edu/nellydonlecture/1111/thumbnail.jp
A SOLVENT AND CATALYST-FREE APPROACH FOR SYNTHESIZING BIO-BASED ADHESIVE USING VARIOUS DIOLS
Get PDFThe development of low-cost bio-based formaldehyde-free adhesives has aroused widespread interest in the adhesive industry. The usage of adhesives that contain urea-formaldehyde or phenol formaldehyde leads to environmental issues. Traditional polyurethane adhesives were based on fossil fuels and the use of solvents made them toxic. Petrochemicals are non-renewable resources that will be depleted soon. Therefore, non-renewable materials should be replaced by bio-based renewable resources. Using renewable bio-resources, especially plant oils, as a substitute for petroleum-based polyols is an approach that showed promise. Here, in this research work, soybean oil polyol (SOP) was used to synthesize polyurethane (PU) adhesive. For studying bonding strength, three different aliphatic diols: ethane-1,2-diol (EDO), 1,4-butanediol (BDO), and 1,6-hexanediol (HDO) with increasing chain length were used as a crosslinking reagent. For studying bonding strength, different wt.% of diols were used to synthesize PU adhesives. The bonding strength of these PU adhesives was observed on three different coupons (oak wood, maple wood, and stainless steel). Interestingly, on oak wood, the bonding strength was increased from 3 MPa to 6.36 MPa after incorporating 10 wt.% of BDO which is the highest bonding strength among all the other adhesive samples. In addition, on maple wood, the bonding strength was observed at 4.47 MPa to 7.79 MPa after adding 7.5 wt.% of HDO crosslinker in PU adhesive. Thermal properties of the synthesized adhesive were studied. A solubility test was also performed to check the solvent\u27s effect on these PU adhesives and the degree of crosslinking. After being immersed in different solvents for 24 hours, there were no notable changes observed in the FT-IR spectra of these PU materials. Contact angle of these adhesives was above 90˚ confirming the hydrophobic nature. This work provides a sustainable alternative to petroleum-based adhesives with good bonding and physical properties without using solvents and catalysts
McCray at Night
No full textMcCray at night, lights illuminate the outside of the building and the moon is in the sky behind ithttps://digitalcommons.pittstate.edu/mccraybuilding/1004/thumbnail.jp
Northwest Corner of McCray
No full textBlack and white photo of McCray looking at the northwest cornerhttps://digitalcommons.pittstate.edu/mccraybuilding/1028/thumbnail.jp