Dynamic Mechanical Analysis and Thermal Stability of Neem Wood Veneer Plastic Composites

Nagamadhu, M.; Kumar, Sushil; Kumar, Sachin; Suraj, R.; Kumar, G. C. Mohan

doi:10.1016/j.matpr.2020.03.754

Cited by 8 publications

(7 citation statements)

References 28 publications

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“…Figures 6 to 11 shows that main effect plots of factor effecting on temperature during machining process. The maximum slope gives the significant in the model [15,16]. The steeper the slope of the line in this investigation is penetration rate followed by depth of cut in all the 5 causes except for 3% of Al2O3 and is depicted in Figures 6, 7, 9, 10, and 11 respectively.…”

Section: Main Effect Plotsmentioning

confidence: 47%

“…The machining variables like speed, depth of cut, feed rate on temperature using multiple linear regression method to get a common equation. Using Taguchi method L15 array was used for the combined effect of operational parameters on temperature were carried out and results were drawn to identify the percentage contribution (ANOVA) of each parameter using Minitab-18 [16,17]. The coefficient of correlation for all the fifteen trials is calculated.…”

Section: Discussionmentioning

confidence: 99%

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Prediction of Temperature During Machinability of Al2O3 Reinforced Al7075

Krishna¹,

Shankar²,

Muniyappa³

et al. 2020

RCMA

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Metal matrix composite Al2O3 particle reinforced Al have become useful engineering materials due to their properties such as low cost, wear-resistant, heat-resistant and low weight. The present study focused on prediction of temperature produced during machining of Al2O3 reinforced with Al7075. In this investigation the percentage of Al2O3 (mesh size of 100-300)was varied 1%, 3%, 5%, 7% and 9% to the base material of Al7075. The temperature was measured using thermal gun at machining tip of the tool at which maximum temperature were measured by varying operational parameters such as depth of cut (0.25, 0.5, 0.75, 1 and 1.25mm), spindle speed (80, 112, 140, 200 and 355rpm) and feed rate (0.10, 0.12, 0.16, 0.2 and 0.25mm/sec). Experimental results revels that the temperature increases with increase in feed rate and depth, whereas, in case of spindle speed there is a fluctuation in temperature for all the combinations considered. The percentage contribution of operational parameters on temperature was determined using ANOVA analysis. Overall analyses for all the combination considered shows that feed rate (45.07%), depth (33.75%) and spindle speed (5.2%) on temperature. The developed models with a P-value are less than 0.05 were considered to be a statistically significant with 95% of confidence interval. A good agreement between experimental and statistical modeling were achieved and comparison of experimental and statistical analysis were drawn.

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Section: Main Effect Plotsmentioning

confidence: 47%

Section: Discussionmentioning

confidence: 99%

Prediction of Temperature During Machinability of Al2O3 Reinforced Al7075

Krishna¹,

Shankar²,

Muniyappa³

et al. 2020

RCMA

View full text Add to dashboard Cite

show abstract

“…While the rubbery state happened at 150⁰C-180⁰C and the veneer entered the viscous flow region at above 180⁰C. This temperature range had compatibility with the DMA test on the wood and the composite veneer [29] [28]. Moreover, the DMA test on bacteria cellulose reported that temperatures of 60°C-110°C could be associated with glass transition temperature [30].…”

Section: Dynamic Mechanicals Analyzementioning

confidence: 78%

“…However, the response was like the storage modulus when the temperature reached over 115⁰C. This was due to the glass transition at temperature 115⁰C-150⁰C [28]. A higher initial storage modulus in the DDV sample was supported by density and hydrogen chains between the wood fiber cellulose, but these chains were weak.…”

Section: Dynamic Mechanicals Analyzementioning

confidence: 91%

Wood Veneer Reinforced with Bacterial Cellulose: Tensile Strength and Dynamic Mechanical Analysis

Nugroho¹,

Triastuti²,

Sufiandi³

et al. 2022

International Journal on Advanced Science, Engineering and Information Technology

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Cellulose from plants is a natural polymer that is very abundant, cheap and easy to process. In addition, there is bacterial cellulose produced from bacterial fermentation of acetic acid with limited production but has high purity, crystallinity, and tensile strength. In this research, the process of wood-veneer delignification was carried out to self-assembly bacterial cellulose into wood cavities on bacterial culture media. Wood veneer reinforced bacteria cellulose was given heat pressure to increase the density and it was expected to form hydrogen bonds between their cellulose molecular chains. This study observed the duration of fermentation in bacterial media culture on the tensile strength of hybrid veneers, microscopic observations, the effect of water on set-recovery, and the characteristics of solid veneers on cyclic loading and temperature using dynamic mechanical analysis (DMA) testing. The microscopic observations prove that Acetobacter xylinum can penetrate the veneer and assemble bacterial cellulose in the cavity. A higher tensile strength ratio of 81.38% was observed in densified veneers with a five-day fermentation period with a modulus of elasticity 156.63% higher than natural veneers. The minimum set-recovery after boiling the hybrid veneer was 29.32%. DMA showed that by reinforcing wood veneer with bacterial cellulose and compacting, it increased cyclic energy storage ability, reduced energy loss, and increased stability under increasing temperatures. Strengthening wood with bacterial cellulose in this method opens new potential for developing more environmentally friendly forest products in the future.

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“…Azadirachta indica wood has good physical and mechanical characteristics and can be used as raw material for making musical instruments (Hassan and Tippner, 2019), cladding panels (Nagamadhu et al, 2020), furniture manufacturing and charcoal production (Antwi-boasiako and Galah, 2021). In addition, its chemical compounds are used in many of industry areas such as oil to control phytopathogens and pests in agriculture (Kala et al, 2019), as a biofuels source (Dhanalakshmi and Madhu, 2019), and for pharmacological purposes in many medicine areas.…”

Section: Introductionmentioning

confidence: 99%

VEGETATIVE RESCUE OF Azadirachta indica BY CUTTINGS

et al. 2022

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Finding forest species adapted to diff erent soil and climatic conditions and, that provide favorable attributes to commercial use is a challenge. Azadirachta indica is a potential species to attend to this goal. Thus, this paper aims to carry out the vegetative rescue of diff erent Azadirachta indica Juss adult trees by cuttings. For that, Azadirachta indica individuals were randomly selected in a plantation of species set ten years ago and the cut was carried out at 30 cm in height. In sequence, verifi cation was carried out on: (a) the stem cut ability to regrowth (collections and measurements of the shoot length on the 15 th , 30 th , 45 th , and 60 th days); (b) the need to use exogenous auxin for rooting induction [testing 0 (control), 2000, 4000, and 6000 mg.l -1 of Indole-3-butyric acid (IBA)]; (c) the ideal of the propagule size (with 8 cm and 13 cm in height); and (c) the rooting dynamics (every seven days for thirty-fi ve days; the propagules were evaluated for callus formation, oxidation, and rooting). The species showed high regrowth ability, as well as easy rooting with or without the use of IBA; it was found that the ideal size for the propagule is 13 cm and that the process of rooting and root elongation is completed after thirty-fi ve days of staking. The conclusion is: (a) using cuttings for the species vegetative rescue is interesting; (b) 13 cm is considered appropriate for the propagule size, and; (c) the aid of IBA at a dose of 2,000 mg L -1 is ideal to standardize rooting.

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Dynamic Mechanical Analysis and Thermal Stability of Neem Wood Veneer Plastic Composites

Cited by 8 publications

References 28 publications

Prediction of Temperature During Machinability of Al2O3 Reinforced Al7075

Prediction of Temperature During Machinability of Al2O3 Reinforced Al7075

Wood Veneer Reinforced with Bacterial Cellulose: Tensile Strength and Dynamic Mechanical Analysis

VEGETATIVE RESCUE OF Azadirachta indica BY CUTTINGS

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