Towards an eco-friendly deconstruction of agro-industrial biomass and preparation of renewable cellulose nanomaterials: A review

Teo, Hwee Li; Wahab, Roswanira Abdul

doi:10.1016/j.ijbiomac.2020.08.076

Cited by 112 publications

(36 citation statements)

References 110 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Intense mechanical treatments are required for defibrillating biomass fibers to the nanoscale and this can be achieved by increasing the number of passages through the mill or the time and pressure used for homogenization (Khalil et al 2014;Teo and Wahab 2020). However, excessive mechanical treatments may cause a dramatic reduction in cellulose CrI (Potulski et al 2016;Viana et al 2019).…”

Section: Rheological Characterization After High-pressure Homogenizationmentioning

confidence: 99%

Micro/nanostructured lignonanocellulose obtained from steam-exploded sugarcane bagasse

et al. 2021

View full text Add to dashboard Cite

This work demonstrates the isolation of lignocellulose micro-nanofibrils, nanocrystals and nanospheres from steam-exploded sugarcane bagasse (SEB). First, steam-explosion was carried out in sugarcane bagasse at 195 °C for 7.5 and 15 min (SEB-7.5 and SEB-15). Untreated sugarcane bagasse was also pretreated by mechanical refining (MRB) in a PFI mill for comparison. Then, SEB and MRB fibers were submitted to alkaline delignification, hypochlorite bleaching for 60 or 180 min (HB60 and HB180), enzymatic hydrolysis (endoglucanase), and high-pressure homogenization. The resulting materials were characterized regarding chemical composition by high-performance liquid chromatography, width and morphology by transmission electron microscopy, crystallinity by X-ray powder diffraction and aspect ratio (length/diameter) by rheology. Levels of glucans (mostly cellulose), hemicelluloses and lignin were: 53.8%, 19.7% and 11.6% in MRB-HB180; 87.8%, <0.1% and 7.2% in SEB-7.5-HB60; 84.3%, <0.1% and 4.8% in SEB-7.5-HB180, 85.9%, <0.1% and 8.4% in SE-15-HB60; and 82.2%, <0.1% and 5% in SE-15-HB180, respectively. Aspect ratios and crystallinity indexes were similar among all groups (~100 and ~73%, respectively), except for SE-15-HB180 (~ 78.5 and 77%, respectively). MRB-HB180 and SE-15 (HB60 and HB180) had the lowest fiber widths (<20 nm) with the presence of nanocrystals in SE-15-HB180, while in the SE-7.5 (HB60 and HB180), fiber widths were greater than 50 nm with the presence of lignin nanospheres in SE-7.5-HB60. Hence, lignocellulose nanomaterials with aspect ratios ranging from micro/nanofibers to nanocrystals were isolated from SEB using a cost-effective production process.

show abstract

Section: Rheological Characterization After High-pressure Homogenizationmentioning

confidence: 99%

Micro/nanostructured lignonanocellulose obtained from steam-exploded sugarcane bagasse

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Furthermore, the hazards of commercial inorganic acids and their corrosion to processing equipment appear to be very environmentally unfriendly. [11] Besides acid hydrolysis, CNCs can also be extracted by other chemical methods (enzymatic hydrolysis, oxidation, etc.) [12] , mechanical methods (high-pressure homogenization, ultrasonication, milling, etc.)…”

Section: Introductionmentioning

confidence: 99%

Extraction and characterization of cellulose nanocrystals from cotton fiber by enzymatic hydrolysis‐assisted high‐pressure homogenization

Zhai

Xiang

Tian

et al. 2021

Vinyl Additive Technology

View full text Add to dashboard Cite

Cellulose nanocrystals (CNCs) have attracted increasing attention in the field of nanomaterials because of its high aspect ratio, good structure, and high thermal stability. In this study, enzymatic hydrolysis-assisted high-pressure homogenization was applied as an environmentally friendly technique to extract CNCs from cotton-derived microcrystalline cellulose (MCC). The overall optimization of enzymatic pretreatment was conducted by response surface methodology, and the maximum CNCs yield was 40.09% under the optimized experimental conditions. The extracted CNCs under the optimal conditions showed needle-like shape with a length of 100-250 nm and a width of 5-10 nm and exhibited an overall particle size range of 3-80 nm. The basic chemical structure of cellulose was not changed after enzymatic hydrolysis and high-pressure homogenization. The CNCs exhibited slightly lower crystallinity and higher thermal stability than MCC. High aspect ratio CNCs extracted in this present study have great potential as a reinforcing agent in biodegradable packaging materials.

show abstract

“…Biomaterials in agro-industrial residues are mostly rich with bioactive compounds such as hydrocolloids and lipids having significant potential as starting materials for the fabrication edible coatings to enhance fruit shelf-life because of their specific chemical properties, biodegradability and biocompatibility. For instance, nanocrystalline and nanofibrillated cellulose can be obtained from lignocellulosic biomass based on agricultural waste such as wheat straw, bagasse, oil palm, cotton and sugar beet [ 30 ]. Similar to the nanocellulose, other essential biopolymers (Lignin, chitin/chitosan, pectin, starch, xanthan gum etc.)…”

Section: Agro-industrial Residues-based Materials In Fabrication Of Edible Coatingsmentioning

confidence: 99%

Potential of engineered nanostructured biopolymer based coatings for perishable fruits with Coronavirus safety perspectives

Singh

Ghosh

2022

Progress in Organic Coatings

View full text Add to dashboard Cite

Fresh fruits are prioritized needs in order to fulfill the required health benefits for human beings. However, some essential fruits are highly perishable with very short shelf-life during storage because of microbial growth and infections. Thus improvement of fruits shelf-life is a serious concern for their proper utlization without generation of huge amount of fruit-waste. Among various methods employed in extension of fruits shelf-life, design and fabrication of edible nanocoatings with antimicrobial activities have attracted considerable interest because of their enormous potential, novel functions, eco-friendly nature and good durability. In recent years, scientific communities have payed increased attention in the development of advanced antimicrobial edible coatings to prolong the postharvest shelf-life of fruits using hydrocolloids. In this review, we attempted to highlight the technical breakthrough and recent advancements in development of edible fruit coating by the application of various types of agro-industrial residues and different active nanomaterials incorporated into the coatings and their effects on shelf-life of perishable fruits. Improvements in highly desired functions such as antioxidant/antimicrobial activities and mechanical properties of edible coating to significantly control the gases (O 2 /CO 2 ) permeation by the incorporation of nanoscale natural materials as well as metal nanoparticles are reviewed and discussed. In addition, by compiling recent knowledge, advantages of coatings on fruits for nutritional security during COVID-19 pandemic are also summarized along with the scientific challenges and insights for future developments in fabrication of engineered nanocoatings.

show abstract

Towards an eco-friendly deconstruction of agro-industrial biomass and preparation of renewable cellulose nanomaterials: A review

Cited by 112 publications

References 110 publications

Micro/nanostructured lignonanocellulose obtained from steam-exploded sugarcane bagasse

Micro/nanostructured lignonanocellulose obtained from steam-exploded sugarcane bagasse

Extraction and characterization of cellulose nanocrystals from cotton fiber by enzymatic hydrolysis‐assisted high‐pressure homogenization

Potential of engineered nanostructured biopolymer based coatings for perishable fruits with Coronavirus safety perspectives

Contact Info

Product

Resources

About