Cellulose Nanofibers From Cassava Agro-Industrial Waste as Reinforcement in Pva Films

Schoeler, Marcilene N.; Scremin, Fernando Reinoldo; Mendonça, Nayara Fernandes de; Benetti, Viviane Prima; Jesús, Jhonatan; Basso, Rafaela; Bittencourt, Paulo Rodrigo Stival

doi:10.21577/0100-4042.20170542

Cited by 8 publications

(17 citation statements)

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“…The band at 1648 cm -1 observed in all samples are mainly associated with the O-H bending of adsorbed water. Moreover, the small peak at 1250 cm -1 corresponding to C-O stretching of hemicellulose and lignin was locally found in CPR and the intensity of this peak was decreased significantly in both AFs and BFs, hence implying the partial removal of hemicellulose and lignin [9,10]. 2(b).…”

Section: Functional Groups Analysismentioning

confidence: 99%

“…After the chemical treatments the AFs, and BFs displayed two main peaks with higher intensity at 16° and 22.1° which were mainly attributed to the crystalline fraction of the cellulose. In addition, CNFs presented characteristic peaks at 16.2° and 22.1° which were significantly related to the typical crystalline structure of cellulose I [9,10,11].…”

Section: Functional Groups Analysismentioning

confidence: 99%

“…In addition, CNFs also demonstrated higher degradation temperatures and Tonset and Tmax were found to be 312 °C and 359 °C, respectively. An increment in degradation temperatures of the fibers was mainly associated with the successful removal of such impurities which normally had lower thermal stability [10,13].…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

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Preparation of cellulose nanofibers from cassava pulp residue by mechanical defibrillation

Suksri

Aht‐Ong

2022

J. Phys.: Conf. Ser.

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Cassava pulp residue (CPR) is one of the most interesting renewable materials that is widely used as active precursors for many applications. Based on its characteristic, cellulose is a typical component locally found in CPR in which it plays an important role in various potential fileds such as reinforcing fillers, stabilizing agents, and dietary fibers. To prepare cellulose nanofibers (CNFs), mechanical defibrillation by microfluidizer is an effective method commonly employed to reduce the size of cellulose from micro-to nanoscale. In this work, CNFs were successfully prepared from CPR by alkaline treatment, hydrogen peroxide bleaching, and mechanical defibrillation at different times. Physical, thermal, and morphological properties of the resulting fibers were comparatively demonstrated. The results showed that most of the impurities in CPR including residual starch granules, lignin, and hemicellulose were removed significantly after chemical treatments. Additionally, thermal degradation temperatures of the obtained fibers were improved remarkably, while the degree of crystallinity with cellulose type I structure was also increased when comparing to CPR. As observed by FE-SEM analysis, the CNFs revealed a fibrous network structure having a mean diameter in the range of 10-30 nm. The produced CNFs could be utilized as reinforcing fillers, food packaging, and biomedical fields.

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Section: Functional Groups Analysismentioning

confidence: 99%

Section: Functional Groups Analysismentioning

confidence: 99%

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Preparation of cellulose nanofibers from cassava pulp residue by mechanical defibrillation

Suksri

Aht‐Ong

2022

J. Phys.: Conf. Ser.

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“…13–15 PVA based composites have been successfully developed using renewable and biodegradable materials such as starch, gellan, wheat gluten, collagen, gelatin, and cellulose (micro and nanocrystalline) chitosan as reinforcing agent. 16–31…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of polyvinyl alcohol filled with date palm midrib powder

Umar

Haque

Al‐Harthi

et al. 2021

Journal of Thermoplastic Composite Materials

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Date palm ( Phoenix dactylifera L) is one of the most widely cultivated crops in different parts of Saudi Arabia. The midribs rich in cellulose, hemicellulose, and lignin are often burnt in the farms, causes severe environmental problems. In the present study, date palm midrib (DPM), these waste materials were powdered and incorporated into polyvinyl alcohol (PVA). Composites were prepared by varying the DPM loading (0–10 wt%) using the solution casting method. Tensile and thermal properties were analyzed for the composites with respect to filler loading. Addition of DPM as filler enhanced the tensile modulus while an inverse effect was observed in the elongation values. Differential scanning calorimeter (DSC) analysis showed a gradual increase in melting temperature (Tm) and crystallinity values for PVA. Thermogravimetric analysis (TGA) indicated that the incorporation of DPM into PVA can increase the thermal stability of PVA. Morphology of the composites were performed using scanning electron microscopy (SEM).

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“…Improvement in tensile strength should be adequate for application and storage, to ensure that the dressing is not be damaged by handling(Elsner et al, 2012;Pires and Moraes, 2014). Therefore, PVA/GT/CNC composite materials in the range of 45-80 MPa showed good mechanical properties compared to previous studies(Pires and Moraes, 2014;Schoeler et al, 2020;Tong et al, 2017). Neat PVA had elongation at break of 48.52% and this slightly decreased to 44.48% in PVA/GT, while elongation at break of PVA/GT/CNC lms decreased with increasing concentration of CNCs.…”

mentioning

confidence: 95%

Evaluation in Cellulose Nanocrystals Effectiveness on Composite Film based Wound Dressing from Poly(vinyl alcohol) and Gum Tragacanth

Diem

Banerjee

Pal

et al. 2021

Preprint

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Biomaterial-based wound dressings were fabricated using cellulose nanocrystals (CNCs) as nano-filler in a polymeric mixture of poly(vinyl alcohol) (PVA) and gum tragacanth (GT) via solution casting. Physical and chemical characteristics of neat PVA, PVA/GT and PVA/GT/CNC films with varying concentrations (2 to 10%) of CNCs were observed. Initial analysis of CNCs showed nanosized particles of 104 nm length and 7 nm width. Scanning electron microscopy (SEM) illustrated cluster formations of CNCs in the polymer matrix. Fourier transform infrared (FTIR) spectrometry was used to confirm the chemical functional groups in the material. The presence of GT and CNCs in the polymer matrix improved water uptake and prolonged stability for 7 days. The CNCs enhanced tensile strength from 54.63 MPa to 80.39MPa. Biological properties of PVA/GT/CNC films were analyzed. Results showed that the dressing material was nontoxic to mouse fibroblast cells L929, while film loaded with betel leaf extract exhibited excellent antibacterial activities against Staphylococcus aureus DMST 8840 and Pseudomonas aeruginosa TISTR 781, indicating that composite film was suitable for application in wound dressing.

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Cellulose Nanofibers From Cassava Agro-Industrial Waste as Reinforcement in Pva Films

Cited by 8 publications

References 0 publications

Preparation of cellulose nanofibers from cassava pulp residue by mechanical defibrillation

Preparation of cellulose nanofibers from cassava pulp residue by mechanical defibrillation

Development and characterization of polyvinyl alcohol filled with date palm midrib powder

Evaluation in Cellulose Nanocrystals Effectiveness on Composite Film based Wound Dressing from Poly(vinyl alcohol) and Gum Tragacanth

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