Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites

Pinto, Elaine Ruzgus Pereira; Barud, Hernane S.; Polito, Wagner Luiz; Ribeiro, Sidney J. L.; Messaddeq, Younès

doi:10.1007/s10973-013-3001-y

Cited by 28 publications

(14 citation statements)

References 34 publications

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“…430°C for each polyurethane materials is associated with the elastic segment degradation derived from polyols polyurethanes constituents. Similar results at the peaks appearance were obtained also by Pinto et al [23]. Although the decrease in the sisal fiber speed of mass loss by silanization, there is no visible improvement in terms of used sisal fibers-based composites speed of mass loss [24].…”

Section: Thermogravimetric Analysissupporting

confidence: 88%

Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites

Głowińska

Datta

Parcheta

2017

J Therm Anal Calorim

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This work is mainly focused on study of thermal and thermomechanical properties of obtained bio-based polyurethane (coded as bio-PU) composites via using different types of bio-components (bio-glycol, modified soybean oil and sisal fiber) in the procedure. The chemical structure, morphology and mechanical properties were also investigated and described in this manuscript in order to know more perfect characterization of produced composites. The bio-based polyurethane matrix of composites was synthesized via prepolymer method. Bio-PU composites were produced by dispersing 5 and 15 mass% of sisal fibers into the polyurethane matrix during their synthesis. To investigate the thermal stability of sisal fibers and bio-PU composites, the thermogravimetric method (TG) was used. Thermomechanical tests were performed by means of dynamic mechanical analysis (DMA). Based on the results of thermomechanical analysis, it was found that the sisal fibers amount has the impact on storage and loss modulus. Chemical structure was confirmed by FTIR spectra. Mechanical results and scanning microscopy images of the composites showed good interfacial adhesion between sisal fibers and the bio-based PU matrix.

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Section: Thermogravimetric Analysissupporting

confidence: 88%

Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites

Głowińska

Datta

Parcheta

2017

J Therm Anal Calorim

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“…Although many studies have been performed to understand the properties of RPUFs reinforced with nanocellose, most of those studies were conducted using nanocrystalline cellulose (CNC) obtained via hydrolysis . Some recent investigations using BNC have shown that BNC can be incorporated into solid polyurethane composites to improve the mechanical properties; however, the effect of incorporating BNC into RPUFs has barely been studied. In a recent study, quasi‐static compressive strength of nanostructured RPUFs using BNC was reported; however, the effect of strain rate on the dynamic compressive properties of this material was not studied.…”

Section: Introductionmentioning

confidence: 99%

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Chiacchiarelli

Cerrutti

Flores‐Johnson

2019

J of Applied Polymer Sci

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Nanocellulose reinforced foams are lightweight with improved mechanical properties; however, the strain‐rate effect on their mechanical response is not yet fully understood. In this work, rigid polyurethane foams (PUFs) nanostructured with bacterial nanocellulose at 0.2 wt % (BNCF) and without it (PUF) are synthesized and subjected to compression tests at different strain rates. The BNC acts as a nucleation agent, reducing the cell size but maintaining a similar apparent density of 40.4 ± 3.3 kg m−3. Both BNCF and PUF exhibit strain‐rate effect on yield stress and densification strain. The BNCF exhibits localized progressive crushing and reduced friability, causing a remarkable recovery in the transverse direction. Numerical simulations show that functionally graded foams subjected to impact could be designed using different layers of PUF and BNCF to vary energy absorption and acceleration rate. The results presented herein warrant further research of the mechanical properties of nanostructured foams for impact applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48701.

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“…On the other hand, so far, no publication has dealt with the incorporation of BNC in a PUF formulation. Articles regarding the formulation of solid PU reinforced mostly CNC and a few with BNC are available in literature . A comprehensive analysis comparing the effect of different nanoparticles on the mechanical properties of PUF has been recently published by Lobos and Velankar …”

Section: Introductionmentioning

confidence: 99%

Improved specific thermomechanical properties of polyurethane nanocomposite foams based on castor oil and bacterial nanocellulose

Gimenez

Leonardi

Cerrutti

et al. 2017

J of Applied Polymer Sci

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Bacterial nanocellulose (BNC) was used to synthesize polyurethane foams (PUFs) prepared from castor oil polyol and MDI diisocyanate using water as the blowing agent. The BNC reacted with the isocyanate, increasing the weight content of urethane hard segments (HS). It did not behave as a nucleation agent, forming a nanometric distribution of cells within the struts followed by a reduction of the apparent density (−7.6%) and a relevant increase of cell size in the growth direction (+37.9%). An alignment of the BNC parallel to the cell walls was observed, producing a nanocomposite with a higher reinforcement weight fraction in that area. At only 0.2 wt %, the BNC behaved as a nanostructured reinforcement, improving the specific compression modulus and strength by +4.67% and +23.6%, respectively, as well as the thermomechanical properties, with an improvement of the specific E′ at 30 °C of +52.4%. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44982.

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Preparation and characterization of the bacterial cellulose/polyurethane nanocomposites

Cited by 28 publications

References 34 publications

Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites

Effect of sisal fiber filler on thermal properties of bio-based polyurethane composites

Compressive behavior of rigid polyurethane foams nanostructured with bacterial nanocellulose at low and intermediate strain rates

Improved specific thermomechanical properties of polyurethane nanocomposite foams based on castor oil and bacterial nanocellulose

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