Fabrication and evaluation of nanobentonite/epoxy laminated poplar veneer lumbers
| dc.contributor.advisor | Misra, Anadi | |
| dc.contributor.author | Mohd Arif | |
| dc.date.accessioned | 2023-02-10T09:14:31Z | |
| dc.date.available | 2023-02-10T09:14:31Z | |
| dc.date.issued | 2021-07 | |
| dc.description.abstract | A method of modification of poplar wood veneers (PWVs) was developed through adhesive bonding with bentonite epoxy nanocomposites (BENs).The process of adhesive bonding was executed through alternate laying of BENs across 4- layers of PWVs by pressing at 10kg/cm2 over 24h.This has afforded laminated veneer lumbers (LVLs) with improve mechanical properties, thermal and dimensional stability. LVLs were characterized through Fourier transformed infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. Effect of weight fraction (WF, wt%) of nanobentonite (NB) ranging 0 to 3.0 on mechanical properties, thermal and dimensional stability of LVLs was investigated with reference to PWVs as control. With WF of NB, the LVLs have rendered ultimate modification (%) in their flexural (80.49), tensile (63.81) and impact strength (18.35) at 2.0 WF of NB over PWVs. LVLs at 12 mm thickness with 2 WF of NB has rendered water resistance by 48.97% and thickness swelling (27.46%) over PWVs. Simultaneous thermogravimetric-differential thermal analysis (TG-DTA-DTG) reveals reduction in moisture content of LVLs ranging 4.92 to 1.4 with WF of NB. TG-DTA reveals onset temperature of degradation of LVLs at 200o C with marginal reduction in their heat of fusion over PVWs. DTG reveals thermal degradation (mg/min) of LVLs ranging 0.79 to 0.41 in the temperature range of 287.93 to 294.40oC. TG endset of LVLs was commenced in the temperature range of 485.78 to 600.68o C with heat of fusion (J/mg) ranging 49.5 to 50.8 and average char residue of 3.45% .The present study reveals sustainable modification of PWVs thorough adhesive boding with BENs to deliver the LVLs with improved durability, thermal and dimensional stability. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810193599 | |
| dc.keywords | poplar, nanocomposites | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 109 p. | en_US |
| dc.publisher | G. B. Pant University of Agriculture and Technology, Pantnagar | en_US |
| dc.research.problem | Nanocomposites | en_US |
| dc.sub | Mechanical Engineering | en_US |
| dc.theme | Poplar | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Fabrication and evaluation of nanobentonite/epoxy laminated poplar veneer lumbers | en_US |
| dc.type | Thesis | en_US |