Cellulose nanofibrils extracted from fique fibers as bio-based cement additive

Hoyos, Catalina Gómez; Zuluaga, Robín; Gañán, Piedad; Piqué, Teresa María; Vázquez, Analı́a

doi:10.1016/j.jclepro.2019.06.292

Cited by 54 publications

(30 citation statements)

References 31 publications

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“…This shows that treatment with hydroxide and chlorite did not completely eliminate hemicellulose and lignin. Similar results were reported in cellulose nanofiber isolation from fique, where Hoyos et al 27 used 5% KOH, 1%NaClO 2 and 1%HCl as a bleaching medium. The authors demonstrated by FTIR the absence of peaks of lignin and hemicellulose in bleached fibers, however, thermogravimetric analysis showed the presence of shoulders around 300 °C indicating the presence of traces of hemicellulose.…”

Section: Characterization Of Raw Materials (Nat-f) and Bleached Fiberssupporting

confidence: 82%

“…On the other hand, the study made by Gomez et al 27 reports nanofiber sizes of fiche residues between 8 and 17 nm using bleaching combined with ultra-stex treatment. Similarly, Ovalle et al 26 , who also worked with fique residues by the method of oxidation by TEMPO and ultrasound, found similar results.…”

Section: Characterization Of Raw Materials (Nat-f) and Bleached Fibersmentioning

confidence: 99%

“…Chemical pretreatment of cellulosefibers is essential to improving nanofibrillation and decreasing energy consumption 25 . These pretreatments are necessary because lignin and hemicelulose coat 15 , 16 , 26 , 27 cellulose chains and lead to different qualities and morphologies of nanofiber 25 . To break the amorphous region of the chains and isolate cellulose nanofibers, several methods have been used since 2008 including acid hydrolysis, enzyme processes, oxidation, high-pressure homogenization, high-intensity ultrasound and steam blasting processes 32 .…”

Section: Introductionmentioning

confidence: 99%

“…Agricultural activity generates a large amount of crop waste, including fique 26 . The fique agribusiness in Colombia focuses on the production of fibers 27 , however, the fibers represent only 4% of the leaves, the remaining 96% corresponds to waste generated in the process, such as juice (70%) bagasse or cabuyasa (30%) 27,28 . Consequently, fique lignocellulosic residues are an alternative source for nanofiber isolation.…”

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confidence: 99%

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Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Guancha-Chalapud

Gálvez

Serna-Cock

2020

Sci Rep

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Cellulose nanofibers were obtained from the Colombian fique (Furcraea bedinghausii) and Acrylic hydrogels (H) and reinforced acrylic hydrogels with fique nanofibres (HRFN) were synthesized, using the solution polymerization method. The extraction was carried out using a combined extraction method (chemical procedures and ultrasound radiation). The raw material (NAT-F), bleached fibers (B-F), hydrolyzed fibers and fibers treated with ultrasound (US-F) were characterized by infrared spectroscopy (FTIR) and thermal stability analysis; also, in order to have a comparison criterion, a commercial microcrystalline cellulose sample (CC) was analyzed, which demonstrated the extraction of fique cellulose. The surface morphology of the NAT-F and the B-F was determined by scanning electron microscopy and the average particle size of the nanofibers was made through transmission electron microscopy. In H y HRFN the strain percent and compression resistance (Rc) were measured. The fique nanofibers showed diameter and length averages of 25.2 ± 6.2 nm and 483.8 ± 283.2 nm respectively. Maximum degradation temperature was 317 °C. HRFN presented higher compression resistance (16.39 ± 4.30 kPa) and this resistance was 2.5 greater than the resistance of H (6.49 ± 2.48 kPa). The results indicate that fique lignocellulosic matrix has potential application for obtaining polymeric type composite materials.

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Section: Characterization Of Raw Materials (Nat-f) and Bleached Fiberssupporting

confidence: 82%

Section: Characterization Of Raw Materials (Nat-f) and Bleached Fibersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Guancha-Chalapud

Gálvez

Serna-Cock

2020

Sci Rep

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“…The interest in materials reinforced with natural fibers is growing because it is possible to obtain materials with good mechanical properties, low density and low cost. In addition, natural fibers are biodegradable, renewable and promote sustainability [ 12 , 13 , 14 , 15 ], which is increasingly important currently. These fibers could replace synthetic fibers in certain applications, since synthetic fibers leave a greater environmental footprint.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Natural Fiber Reinforced Foamed Concrete

et al. 2020

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The mechanical characterization of plain foamed concrete (PFC) and fiber-reinforced foamed concrete (FRFC) with a density of 700 kg/m3 was performed with compression and tension tests. FRFC was reinforced with the natural fiber henequen (untreated or alkaline-treated) at volume fractions of 0.5%, 1% and 1.5%. Polypropylene fiber reinforcement was also used as a reference. For all FRFCs, the inclusion of the fibers enhanced the compressive and tensile strengths and plastic behavior, which was attributed to the increase of specimen integrity. Under compressive loading, after the peak strength, there was no considerable loss in strength and a plateau-like regime was observed. Under tensile loading, the fibers significantly increased the tensile strength of the FRFCs and prevented a sudden failure of the specimens, which was in contrast to the brittle behavior of the PFC. The tensile behavior enhancement was higher when treated henequen fibers were used, which was attributed to the increase in the fiber–matrix bond produced by the alkaline treatment. The microscopic characterization showed that the inclusion of fibers did not modify the air-void size and its distribution. Higher energy absorption was observed for FRFCs when compared to the PFC, which was attributed to the enhanced toughness and ductility by the fibers. The results presented herein warrant further research of FRFC with natural henequen fibers for engineering applications.

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Redispersible Polymer Powders with High Bio‐Based Content from Core–Shell Nanoparticles

Zanoni

Casiraghi

Pò

et al. 2022

Macro Materials & Eng

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Redispersible polymer powders (RDPPs), i.e., additives obtained from core-shell nanoparticles and commercialized in the form of a dry powder, find intensive application in the concrete industry. However, they are mainly produced from fossil resources. Therefore, the development of bio-based RDPPs is important to reduce the carbon footprint of these additives. In this work, two types of core-shell nanoparticles with a high percentage of bio-based content are synthesized and show to be good candidates as RDPPs. In the first case, up to 75% of bio-based content is obtained by combining lauryl acrylate, derived from coconut and palm kernel oil, as main core material, with isobornyl methacrylate, coming from pine resin, exploited to create the outer harder shell. In the second case, a degradable macromonomer obtained by the ring opening polymerization of lactide using 2-hydroxyethyl methacrylate as initiator is used as the core-forming monomer to obtain degradable RDPPs. In both cases, the particles are synthesized with a two-step emulsion polymerization process conducted in one pot and then spray-dried to obtain the RDPPs of interest. The morphology and redispersibility of the powders are characterized. Finally, their use as concrete additives is preliminarily assessed by evaluating their effect on changes in the surface morphologies of concrete specimens.

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Cellulose nanofibrils extracted from fique fibers as bio-based cement additive

Cited by 54 publications

References 31 publications

Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Mechanical Properties of Natural Fiber Reinforced Foamed Concrete

Redispersible Polymer Powders with High Bio‐Based Content from Core–Shell Nanoparticles

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