Structural characterization and mechanical properties of wet-processed fibreboard based on chemo-thermomechanical pulp, furanic resin and cellulose nanocrystals

Popescu, Constantin; Jones, Dennis; Schalnat, Joanna; Segerholm, Kristoffer; Henriksson, Marielle; Westin, Mats

doi:10.1016/j.ijbiomac.2019.12.199

Cited by 13 publications

(14 citation statements)

References 26 publications

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“…From the experimental spectra small differences can be observed, but the second derivative spectra highlight the main differences among the spectra, mostly in the CH stretching vibration region [ 24 ]. The experimental and calculated spectra and their second derivatives of the samples in the region 3750–2700 cm −1 are presented in Figure 1 .…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen that both components have a broad band in the 3750 and 3000 cm −1 regions assigned to different stretching vibrations of OH groups, and two bands in the 3000–2700 cm −1 spectral region assigned to symmetric and asymmetric stretching vibration of CH 3 and CH 2 groups [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

“…Other important bands in the fingerprint region of the gelatin spectrum are observed at 1447, 1395, 1279, 1197, 1159, 1116, 1081, 1028 and 971 cm −1 . These are assigned to the CH deformation vibration, OH in plane deformation vibration, CH bending vibration, C-N stretching vibration in amine groups, C-O-C stretching vibration, C-C stretching vibration and C-O stretching vibration, respectively [ 23 , 24 , 25 ].…”

Section: Resultsmentioning

confidence: 99%

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Gelatin Reinforced with CNCs as Nanocomposite Matrix for Trichoderma harzianum KUEN 1585 Spores in Seed Coatings

et al. 2021

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Increasing interest on sustainable agriculture has led to the development of new materials which can be used as seed coating agents. In this study, a new material was developed based on gelatin film reinforced with cellulose nanocrystals (CNC) which was further used as nanocomposite matrix for Trichoderma harzianum KUEN 1585 spores. The nanocomposite films were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM), showing the formation of new hydrogen bonds between the components with a good compatibility between them. Measurements of water contact angles and tests of water vapor sorption and swelling degree revealed an improvement in the water vapor absorption properties of the films as a result of their reinforcement with CNC. Furthermore, by adding the Trichoderma harzianum KUEN 1585 spp. in the seed coating material, the germination percentage, speed of germination and roots length of the corn seeds improved. The polymeric coating did not inhibit the growth of T. harzianum KUEN 1585, with this material being a good candidate in modern agriculture.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Gelatin Reinforced with CNCs as Nanocomposite Matrix for Trichoderma harzianum KUEN 1585 Spores in Seed Coatings

et al. 2021

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“…The FTIR spectra of the BMI adhesives and their cured networks were shown in Figure 2. The 3460 cm À1 absorption peak is attributed to the -OH stretching vibration, the absorption peaks at 2967 cm À1 and 2920 cm À1 are associated with the stretching vibration of methyl and methylene groups, and the absorption bands at 1712*1774 cm À1 are attached to the stretching vibrational of the C¼O from lactone groups and imide rings of BDM and mPEI-C, 24,25 respectively. The intensity of absorption peaks has little change before and after curing, indicating the corresponding groups did not participate in the curing reaction.…”

Section: Chemical Structure Analysis Of the Bmi Resinsmentioning

confidence: 99%

Characterization and properties of high-temperature resistant structure adhesive based on novel toughened bismaleimide resins

Wang

Xiong

Ren

et al. 2020

High Performance Polymers

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A series of high-temperature resistant structural adhesives were prepared based on the copolymerization of 4,4′-bismaleimidediphenylmethane (BDM) and 2,2′-diallylbisphenol A (DABPA) together with a novel maleimide-capped polyetherimide containing cardo side groups (mPEI-C) as toughening agent. The chemical structure of the adhesives and their cured networks was characterized by Fourier transform infrared (FTIR) spectrometer. Their curing behavior and kinetics were analyzed using differential scanning calorimetry (DSC). The thermal properties, mechanical properties, bonding strength and moisture absorption behavior of the cured products were investigated by thermogravimetric analysis (TGA) and dynamic mechanical thermal analysis (DMA), etc. The modified resin system with mPEI-C exhibit similar curing behavior, and the apparent activation energy ( E a) and reaction order ( n) are equal to around 85.14 kJ/mol and 0.91, respectively. With increasing mPEI-C contends, the thermal stability is improved, the char yield is increased from 26.5% to 37.1%, and the glass transition temperatures have a slight decrease. The maximum flexural strength, impact strength and bonding strength are increased by 28.4%, 93.1% and 44.6%, respectively. The results of hygrothermal aging experiments exhibit the addition of mPEI-C has no obvious influence on the hygroscopicity of the modified resins.

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“…CNCs forms a cluster of networks with a relatively small amount and increase the exibility modulus. [4,5] substantially used as modi er to enhance the interfacial adhesion between nanocrystals matrix. [6][7][8] Cellulose has a natural nanostructure which can be detected by various methods and leads to the introduction of cellulose nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

Modification of cellulose nanocrystals with 2-carboxyethyl acrylate in the presence of epoxy resin to enhance its adhesive property

Aziz

Zheng

Mehmood

et al. 2021

Preprint

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We synthesized the cellulose nanocrystals (CNCs) by using cotton as a raw material, then it was modified with 2-carboxyethyl acrylate to improve its adhesion and thermal properties. CNCs was chosen as a modifier to improve the interfacial adhesion between the reinforced nanocrystals and E-51 epoxy resin system. This gives a better modulus of elasticity, a lower coefficient of energy, and thermal expansion. Significant improvements in modulus properties, strength, transparency and thermal stability were observed with modified cellulose nanocrystals (MCNCs) compared with the standard sample. SEM, and transmission electron microscope (TEM), powder diffraction (XRD), (TGA and DTG) and Fourier transform infrared spectroscopy (FTIR) were used for the isolation of synthetic (native and modified) cellulose nanocrystals. In addition, the MCNCs adhesion properties with E-51 (Bisphenol A diglycidyl ether) epoxy resins were also investigated using the Zwick/Roell Z020 model.

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Structural characterization and mechanical properties of wet-processed fibreboard based on chemo-thermomechanical pulp, furanic resin and cellulose nanocrystals

Cited by 13 publications

References 26 publications

Gelatin Reinforced with CNCs as Nanocomposite Matrix for Trichoderma harzianum KUEN 1585 Spores in Seed Coatings

Gelatin Reinforced with CNCs as Nanocomposite Matrix for Trichoderma harzianum KUEN 1585 Spores in Seed Coatings

Characterization and properties of high-temperature resistant structure adhesive based on novel toughened bismaleimide resins

Modification of cellulose nanocrystals with 2-carboxyethyl acrylate in the presence of epoxy resin to enhance its adhesive property

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