Procuring the nano-scale lignin in prehydrolyzate as ingredient to prepare cellulose nanofibril composite film with multiple functions

Huang, Caoxing; Dong, Huiling; Zhang, Zhipeng; Bian, Huiyang; Yong, Qiang

doi:10.1007/s10570-020-03427-9

Cited by 116 publications

(49 citation statements)

References 53 publications

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“… 7 On the other hand, lignin has great potential for UV-blocking products due to its functional groups, such as phenol, ketones, and chromophores. 8 Besides UV-blocking, lignin also has another interesting property, namely, its antioxidant activity, which is due to its richness in phenolic hydroxyl groups. 9 Several attempts at lignocellulosic film development have been recently reported.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant and UV-Blocking Properties of a Carboxymethyl Cellulose–Lignin Composite Film Produced from Oil Palm Empty Fruit Bunch

et al. 2021

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Oil palm empty fruit bunch (EFB) pulp with the highest cellulose content of 83.42% was obtained from an optimized process of acid pretreatment (0.5% v/v H 2 SO 4 ), alkaline extraction (15% w/w NaOH), and hydrogen peroxide bleaching (10% w/v H 2 O 2 ), respectively. The EFB cellulose was carboxymethylated, and the obtained carboxymethyl cellulose (CMC) was readily water-soluble (81.32%). The EFB CMC was blended with glycerol and cast into a composite film. Lignin that precipitated from the EFB black liquor was also incorporated into the film at different concentrations, and its effect on the UV-blocking properties of the film was determined. Interestingly, the EFB CMC film without lignin addition completely blocked UV-B transmittance. The incorporation of lignin at all concentrations significantly enhanced the UV-A blocking and other physical properties of the film, including the surface roughness, thickness, and thermal stability, although the tensile strength and water vapor permeability were not significantly affected. Complete UV-A and UV-B blocking were observed when lignin was added at 0.2% (w/v), and the film also exhibited the highest antioxidant activity against 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals with an half-maximal inhibitory concentration (IC 50 ) value of 3.87 mg mL –1 .

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Section: Introductionmentioning

confidence: 99%

Antioxidant and UV-Blocking Properties of a Carboxymethyl Cellulose–Lignin Composite Film Produced from Oil Palm Empty Fruit Bunch

et al. 2021

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“…The light transmittance of PLA and PLA-based composite films has been measured throughout a UV-vis range from 200 to 800 nm ( Supplementary Figure 4 ). Theoretically, film transparency is largely depending on the micro-structure of the films ( Kim, 2008 ; Lizundia et al, 2016 ; Huang et al, 2020 ). Compared with visible light (400–800 nm), UV light (200–400 nm) is more readily to be absorbed by the test films and the transmittance rate gradually reaches a plateau when the wavelength of incident light exceeds 400 nm.…”

Section: Resultsmentioning

confidence: 99%

Cellulose Isolated From Waste Rubber Wood and Its Application in PLA Based Composite Films

Zhou

Rao

et al. 2021

Front. Bioeng. Biotechnol.

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Waste rubber wood (RW) is the castoff of rubber plantation with abundant reservation but without high-value utilization. In this study, cellulose with high purity has been efficiently isolated from waste RW and further processed into cellulose nanocrystals. By means of acetylation, more hydrophobic cellulose-based products, namely acetylated rubber wood cellulose (Ac–RWC) and acetylated rubber wood cellulose nanocrystals (Ac–RW–CNC) had been attempted as reinforcing fillers for fabricating two series of PLA-based composite films via spin coating instead of currently prevailing melt compounding technique. To ensure a uniformed dispersion of fillers in PLA matrix, the addition of reinforcing filler should be equal to or less than 5% based on the film dry weight. Compared with pure PLA film, the Ac–RWC reinforced PLA composite films are more thermally stable, while the Ac–RW–CNC reinforced PLA composite films on the other hand exhibit more enhanced performance in mechanical properties and the degree of crystallinity. The highest tensile strength (55.0 MPa) and Young’s modulus (3.9 GPa) were achieved for 5%Ac–RW–CNC/PLA composite film.

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“…Washing is considered to be the easiest way to remove the non-sugar compounds (i.e., furan derivatives, carboxylic acids, phenolic compounds) that have a negative effect on downstream enzymatic hydrolysis and fermentation process after the pretreatment of lignocellulose [ 27 , 28 ]. However, the washing operation consumes a lot of water, causing waste of resources and environmental problems [ 4 , 29 ]. In order to address the influence of residual HA on enzymatic hydrolysis efficiency, HA’s effects on cellulase activity were firstly investigated.…”

Section: Resultsmentioning

confidence: 99%

Comprehensive understanding of the effects of metallic cations on enzymatic hydrolysis of humic acid-pretreated waste wheat straw

Tang

Huang

et al. 2021

Biotechnol Biofuels

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Background Humic acids (HA) have been used in biorefinery process due to its surfactant properties as an aid to the pretreatment of lignocellulose, with results indicating a positive effect on delignification. However, the HA remaining on the surface of the pretreated lignocellulose has also been shown to provide a negative effect on ensuing enzymatic digestibility. Hence, a strategy of complexing metallic cations with HA prior to enzymatic hydrolysis was proposed and demonstrated in this work in an effort to provide a means of HA mitigation that does not involve significant water consumption via extensive washing. Results Results showed that the enzymatic hydrolysis efficiency of waste wheat straw decreased from 81.9% to 66.1% when it was pretreated by 10 g/L HA, attributed to the inhibition ability of the residual HA on enzyme activity of cellulase with a debasement of 36.3%. Interestingly, enzymatic hydrolysis efficiency could be increased from 66.1% to 77.3% when 10 mM Fe3+ was introduced to the system and allowed to associate with HA during saccharification. Conclusions The addition of high-priced metallic cations (Fe3+) has successfully alleviated the effect of HA on cellulase activity. It is our hope in demonstrating the complexation affinity between metallic cations and HA, future researchers and biorefinery developers will evaluate this strategy as a unit operation that could allow economic biorefining of WWS to produce valuable biochemicals, biofuels, and biomaterials.

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Procuring the nano-scale lignin in prehydrolyzate as ingredient to prepare cellulose nanofibril composite film with multiple functions

Cited by 116 publications

References 53 publications

Antioxidant and UV-Blocking Properties of a Carboxymethyl Cellulose–Lignin Composite Film Produced from Oil Palm Empty Fruit Bunch

Antioxidant and UV-Blocking Properties of a Carboxymethyl Cellulose–Lignin Composite Film Produced from Oil Palm Empty Fruit Bunch

Cellulose Isolated From Waste Rubber Wood and Its Application in PLA Based Composite Films

Comprehensive understanding of the effects of metallic cations on enzymatic hydrolysis of humic acid-pretreated waste wheat straw

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