Micro-FTIR spectroscopy and partial least-squares regression for rapid determination of moisture content of nanogram-scaled heat-treated wood

Yuan, Hanmeng; Tang, Shiyao; Luo, Qiu‐Yan; Teng, Xinying; Wang, Wenlei; Ma, Qiang; Guo, Xin

doi:10.1186/s10086-020-1848-7

Cited by 16 publications

(2 citation statements)

References 42 publications

(43 reference statements)

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“…Moreover, another common peak found in both the samples was due to a C=O stretch at 1722 cm −1 [43]. O-H vibration was also observed in both the samples at 3362 cm −1 [44] and 3358 cm −1 [45] respectively. We have added the FTIR spectra of GO, Si, GO+Si nanocomposite in Supplementary, figure S2.…”

Section: Ftir Analysismentioning

confidence: 74%

Post-synthesis treatment of graphene oxide/silica particles nanocomposite with piranha acid for functionalization

Mukherjee¹,

Kumari²,

Moulick³

2021

Adv. Nat. Sci: Nanosci. Nanotechnol.

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The discovery of 2D materials has led researchers to a broad material platform. Their excellent physical, chemical and electrical properties along with the layered structure have found applications in various fields. However, these materials also have limitations and functionalisation is one of the mechanisms that improves their properties. In our previous work, we observed surface-enhanced Raman spectroscopy (SERS) after covalent attachment of protein to the graphene nanocomposite where piranha acid was used to generate the functional groups. The current work describes the synthesis and characterisation of a graphene oxide-silica particle nanocomposite after piranha acid treatment at different time intervals. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy were performed to indicate structural changes which facilitated the protein attachment. The SEM and TEM results indicated that the sample which was piranha acid activated for 3 min displayed better arrangement of silica particles on the graphene sheets with exposition of the highest net surface area in the graphene sheet, compared to the other samples and determined to be the best functionalised nanocomposite for further applications. Morphological instability of the graphene sheets and clustering of silica particles were observed in the samples treated for more than 3 min. Interestingly, the same degree of graphitisation was observed in all the samples when I D /I G ratios {(≤0.99) ≠ 0} were determined by Raman spectroscopy.

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Section: Ftir Analysismentioning

confidence: 74%

Post-synthesis treatment of graphene oxide/silica particles nanocomposite with piranha acid for functionalization

Mukherjee¹,

Kumari²,

Moulick³

2021

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…Therefore, heat-treated wood with elegant color and dimensional stability is widely used for furniture, flooring, cladding and outdoor utilities [9], while the mechanical properties of the heat-treated wood are critical for its modification and application [10]. Most previous studies were focused on the changes of micromechanical properties of cell walls with different heat treatments that use nanoindentation [11,12]. Nanoindentation is widely used to characterize the quasi-static mechanical properties of metals and polymers at the micro scale [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Dong¹,

Wang

2021

Forests

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In this paper, Berkovich depth-sensing indentation has been used to study the effects of the temperature-dependent quasi-static mechanical properties and creep deformation of heat-treated wood at temperatures from 20 °C to 180 °C. The characteristics of the load–depth curve, creep strain rate, creep compliance, and creep stress exponent of heat-treated wood are evaluated. The results showed that high temperature heat treatment improved the hardness of wood cell walls and reduced the creep rate of wood cell walls. This is mainly due to the improvement of the crystallinity of the cellulose, and the recondensation and crosslinking reaction of the lignocellulose structure. The Burgers model is well fitted to study the creep behavior of heat-treated wood cell walls under different temperatures.

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Development of sunflower husk reinforced polypropylene based sustainable composites: An experimental investigation of mechanical and thermal performance

Irez

2024

Journal of Polymer Science

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Climate change, shrinking resources, and rising raw material costs have pushed the industry to create more sustainable, and lightweight materials. Natural fiber composites are materials of interest for replacing conventional materials such as steel. Sunflower husks (SH), among many other natural fibers, are readily accessible as agricultural waste and have advantageous properties. In this study, sunflower husks were mixed with polypropylene (PP) matrix using a twin‐screw extruder, and then tests specimens for experimental characterizations were manufactured through injection molding. The tensile tests revealed that the inclusion of SH into PP decreased the load‐bearing capacity of the composites by around 20% and increased their impact resistance by over 200%, while reducing the ductility by about eight times. Moreover, magnesium hydroxide (Mg(OH)2) was incorporated into the composites as a flame retardant, and it has improved the stiffness and impact resistance of the composites. Besides, incorporation of SH and Mg(OH)2 elevated significantly the glass transition temperature of the composites. The use of Mg(OH)2 delayed 60% the flame retention of the composites observed from UL‐94 HB flammability testing. In summary, they could be suitable for components such as spare wheel wells, seat backs, trunk floor, the acoustic panel behind the door, and airbag housing.

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Micro-FTIR spectroscopy and partial least-squares regression for rapid determination of moisture content of nanogram-scaled heat-treated wood

Cited by 16 publications

References 42 publications

Post-synthesis treatment of graphene oxide/silica particles nanocomposite with piranha acid for functionalization

Post-synthesis treatment of graphene oxide/silica particles nanocomposite with piranha acid for functionalization

Temperature-Dependent Creep Behavior and Quasi-Static Mechanical Properties of Heat-Treated Wood

Development of sunflower husk reinforced polypropylene based sustainable composites: An experimental investigation of mechanical and thermal performance

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