Engineering nanocellulose superabsorbent structure by controlling the drying rate

Barajas‐Ledesma, Ruth M.; Patti, Antonio F.; Wong, Vanessa Nl; Raghuwanshi, Vikram Singh; Garnier, Gil

doi:10.1016/j.colsurfa.2020.124943

Cited by 31 publications

(32 citation statements)

References 38 publications

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“…The inherent properties, ubiquitous availability, low cost, and agile paper production and lamination processes make this material widely available, suitable to address the health-care criteria, and able to adapt to rapid changes in demand during a pandemic event or other emergency that results in critical PPE shortage situations. Laminated paper materials are attracting attention for their physical properties, as well as their renewability and biodegradability in many industries including packaging [ 21 , 22 , 23 ], superabsorbents [ 24 , 25 , 26 , 27 ], membranes [ 28 , 29 ] and biomedical [ 30 , 31 , 32 ]. However, the use of paper-based protective apparel has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

Engineering laminated paper for SARS-CoV-2 medical gowns

Hossain

Maliha

Barajas‐Ledesma

et al. 2021

Polymer

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The COVID-19 pandemic has highlighted the need for diversity in the market and alternative materials for personal protective equipment (PPE). Paper has high coatability for tunable barrier performance, and an agile production process, making it a potential substitute for polyolefin-derived PPE materials. Bleached and newsprint papers were laminated with polyethylene (PE) coatings of different thicknesses, and characterised for their potential use as medical gowns for healthcare workers and COVID-19 patients. Thicker PE lamination improved coating homogeneity and water vapour resistance. 49 GSM bleached paper with 16 GSM PE coating showed high tensile and seam strength, and low water vapour transmission rate (WVTR). Phi-X174 bacteriophage testing revealed that paper laminated with 15 GSM coating hinders virus penetration. This research demonstrates that PE laminated paper is a promising material for low cost viral protective gowns.

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Section: Introductionmentioning

confidence: 99%

Engineering laminated paper for SARS-CoV-2 medical gowns

Hossain

Maliha

Barajas‐Ledesma

et al. 2021

Polymer

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“…Oven-dried 50 °C SAP shows a higher ionic sensitivity compared to the others. This is attributed to its morphology, characterised by a high pore area and large number of small pores in the nanometre scale (Barajas-Ledesma et al 2020). This increases the number of accessible COOgroups in the superabsorbent network, whereas the swelling mechanism of freeze-dried SAP is mainly driven by physical entrapment of water.…”

Section: Effect Of Ionic Strength On Superabsorbent Performancementioning

confidence: 99%

“…Freeze-dried superabsorbent is a foamy-like material characterised by an open structure, whereas oven-dried SAP is a thin-film with pores ranging in the nanometre scale (Barajas-Ledesma et al 2020). When the freeze-dried nanocellulose SAP dries, its structure collapses, leaving large pores in the soil which increase soil matrix porosity and facilitate water evaporation (Beven and Germann 1982).…”

Section: Effect Of Application Rate On Soil Water Retentionmentioning

confidence: 99%

“…29 Recent studies have shown that the resulting material can be dried either by freeze-drying or evaporative-drying to create a highly porous superabsorbent consisting of an entanglement of cellulose nanofibers (CNF) of high surface area. 30 Despite these advantages, few nanocellulose-based superabsorbents have been developed for application in agriculture. Though several studies have investigated cellulose-based superabsorbents, most of them are crosslinked with acrylamide or acrylic acid, 31 reducing their biodegradability and sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have shown that the resulting material can be dried either by freeze-drying or evaporative-drying to create a highly porous superabsorbent consisting of an entanglement of cellulose nanofibres (CNF) of high surface area (Barajas-Ledesma et al 2020). Despite these advantages, few nanocellulose-based superabsorbents have been developed for application in agriculture.…”

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Carboxylated nanocellulose superabsorbent: Biodegradation and soil water retention properties

Barajas‐Ledesma

Wong

Little

et al. 2021

J of Applied Polymer Sci

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Carboxylated nanocellulose superabsorbent polymers (SAP) can be used to increase soil water retention in agriculture. The benefits investigated are influenced by the superabsorbent structure, composition and application rate.In this study, TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl)-oxidised nanocellulose superabsorbents were prepared using three different drying techniques: freeze-dried, and oven-dried at low and high temperatures. The swelling capacity in soil water extracts was measured and compared to deionised water. Soil was amended with different application rates of these superabsorbents to evaluate the effects on water retention, microbial community and their biodegradation.The absorption performance of nanocellulose superabsorbents is affected by the concentration and type of salts in the soil water extracts. Oven-dried at 50 °C SAP presents the highest ionic sensitivity attributed to its large number of accessible carboxylate groups. The water retention of the soil treatments increases with increasing application rate. Soil treated with the freeze-dried superabsorbent shows the highest water retention, whereas those amended with the 50°C oven-dried SAP remain moist the longest. The biodegradation rate of these materials depends on the application rate and nutrient availability. Carboxylated nanocellulose superabsorbents emerge as highperformance biodegradable materials for agricultural use, able to replace the current nonbiodegradable petrochemical-based superabsorbents. INTRODUCTIONWater is critical for agricultural production and food security. Irrigated agriculture uses about 70% of the water available for human consumption worldwide and accounts for 59% of the total fresh water in Australia (Organisation for Economic Co-operation and Development; Department of Agriculture 2020). Water availability has been impacted by climate change, drought and water shortage; its decrease has affected world agricultural development in recent years. According to Müller C. (2010), agricultural yields will decline between 2 -15% over the next 30 years due to climate change. Hence, the efficient use of water resources is crucial for the long-term sustainability of the agricultural industry.One strategy to optimise water retention in soils and hence making it more available to crops, is the use of superabsorbent polymers (SAPs) (Zohuriaan-Mehr et al. 2008). SAPs are three-dimensional (3D) networks of linear or branched hydrophilic polymers physically or chemically cross-linked (Guilherme et al. 2015). SAPs can absorb and hold water at hundreds of times their own weight and remain stable in their swollen state (Ahmed 2015;Ghorbani et al. 2019;Shen et al. 2016;Gross JR 1990). They have been extensively used in many applications including biomedicine (Curvello et al. 2019), food and beverages (Shewan and Stokes 2013), personal care and hygiene products (Bashari et al. 2018). In the agricultural and horticultural industries, SAPs have a range of applications which includes seed coatings, seed additives and root dips (Zoh...

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Nanocellulose as an Ecofriendly Source in Nanoscience: Synthesis, Characterization, Properties, and Applications—A Review

Vijayan,

Prabhu,

A. G.

2024

Macromolecular Symposia

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Nanocellulose is a promising future material which has got attention due to its unique characteristics. Properties which make nanocellulose special are the eco‐friendliness, high strength, stiffness, renewability, abundance, tunable surface characteristics, and low weight. This review addresses major factors like processing of nanocellulose, modification, properties, preparation of nanocomposites from nanocellulose, and their application in different fields. This review facilitates the selection of biomass sources, processing techniques for NC synthesis, application, and challenges. This review also emphasizes on different applications of nanocellulose reinforced polymer composites in different areas such as biomedical, packaging, electronic and environmental remediation, etc. Recent developments in the processing of cellulose nanocomposites using solution casting and other complex methods have been highlighted. As an emerging functional polymeric material, nanocellulose has become a research hotspot. The importance of nanocellulose in future includes the design of nanocellulose as per the specific user requirements, reduction of the production cost, and making customized products using nanocellulose using green processing. Hence this review is intended to provide new insights into the field of eco‐friendly fundamental materials with in‐depth perspectives and current research trends in its future applications.

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Engineering nanocellulose superabsorbent structure by controlling the drying rate

Cited by 31 publications

References 38 publications

Engineering laminated paper for SARS-CoV-2 medical gowns

Engineering laminated paper for SARS-CoV-2 medical gowns

Carboxylated nanocellulose superabsorbent: Biodegradation and soil water retention properties

Nanocellulose as an Ecofriendly Source in Nanoscience: Synthesis, Characterization, Properties, and Applications—A Review

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