Cellulose nanofibrils/nanoclay hybrid composite as a paper coating: Effects of spray time, nanoclay content and corona discharge on barrier and mechanical properties of the coated papers

Mirmehdi, Seyedmohammad; Hein, Paulo Ricardo Gherardi; Sarantópoulos, Claire Isabel Grígoli de Luca; Dias, Marali Vilela; Tonoli, Gustavo Henrique Denzin

doi:10.1016/j.fpsl.2017.11.007

Cited by 58 publications

(24 citation statements)

References 29 publications

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“…The acid hydrolysis is selective on degradation of amorphous holocellulose, resulting in colloid suspensions of welldefined cellulose nanocrystals (ALEMDAR; SAIN, 2008). Cellulose nanofibers have been studied for a myriad of applications, such as biofilms (GUIMARÃES JR. et al, 2015;BUFALINO et al, 2015a;BUFALINO et al, 2015b;SCATOLINO et al, 2017a;SCATOLINO et al, 2017b), reinforced papers (LAVOINE et al, 2014;MIRMEHDI et al, 2017), nano-metal complexes (DONIA et al, 2012;GUPTA et al, 2013;ARANTES et al, 2017), hybrid materials (FORTUNATI et al, 2014;RAABE et al, 2014;RAABE et al, 2015), biomedical products (SVENSSON et al, 2005;NIKOLAJASKI et al, 2012) and fiber-cements (FONSECA et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Strength Improvement of Hydroxypropyl Methylcellulose/ Starch Films Using Cellulose Nanocrystals

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Mirmehdi

et al. 2017

CERNE

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Interest in cellulose nanocrystals obtained from natural resources has grown mainly because of features that such materials provide when inserted into polymeric matrices. The present study aimed to evaluate the effect of cellulose nanocrystals addition on mechanical properties of biofilms made from hypromellose (or hydroxypropyl methylcellulose - HPMC) and cassava starch blends (CS). The cellulose nanocrystals were produced by acid hydrolysis and characterized by optical microscopy (OM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetry (TG). Films were made with pure CS, pure hypromellose and also with blends of CS and hypromellose by casting. Then cellulose nanocrystals were added to the blends in the concentrations of 1, 3 and 10% (m/m). Evaluations of the films included tensile performance and fracture surface by scanning electron microscopy (SEM). It was observed that the reinforcement with nanocrystals improved the mechanical properties of the films, and their fracture surface showed that cellulose nanocrystals promoted an improvement in the cohesion of the hypromellose and starch molecules in the blend, and created a more homogeneous surface.

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Section: Introductionmentioning

confidence: 99%

Strength Improvement of Hydroxypropyl Methylcellulose/ Starch Films Using Cellulose Nanocrystals

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Mirmehdi

et al. 2017

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“…Despond et al (2005) observaram que a absorção de água em papel revestido com quitosana diminuiu ainda mais com o uso de uma camada de cera de carnaúba sobre a camada de quitosana. Mirmehdi et al (2018) também reportaram diminuição da permeabilidade a gases de papel de escrita revestidos com nanoargila e nanofibrilas.…”

Section: Seção Transversal Dos Papéis Multicamadasunclassified

“…Para otimizar as propriedades de barreira do papel revestido já foram reportados na literatura diferentes materiais: polímeros e biopolímeros (ZHANG et al, 2015), ceras (DESPOND et al, 2005), argilas (KK ; KO, 2015;MIRMEHDI et al, 2018) e nanomateriais (LI et al, 2007). Quanto a melhoria de propriedades mecânicas, destacam-se os materiais nanométricos, como por exemplo as nanoargilas e as nanoestruturas celulósicas, que podem contribuir adicionalmente para a melhoria das propriedades de barreira (BENEVENTI et al, 2014;GUIMARÃES JÚNIOR et al, 2018HULT et al, 2010;PRADO et al, 2018SCATOLINO et al, 2017).…”

Section: Introductionunclassified

Incorporação de Nanomateriais e emulsão de ceras no desenvolvimento de papéis multicamadas

Matos¹,

Rompa²,

Damásio³

et al. 2019

Sci. For.

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The objective of this work was to evaluate the effects of coating by deposition of cellulose nanofibrils, nanoargila and wax emulsion of bee and carnauba in the grammage, thickness and water vapor permeability of kraft papers. The suspensions were deposited by spatulation on kraft paper of 60 g/m 2 until they reached a grammage of 80 g/m 2 , where treatments containing only layers of cellulose nanofibrils (NF) and layers of nanoargila (MMT) were prepared, treatments with layers of cellulose nanofibrils overlaid by carnauba wax emulsion (NF/EC) and bee (NF/EA), treatments with layers of nanoargila also overlaid by emulsion layers of carnauba wax (MMT/EC) and bee wax (MMT/EA) and treatments with only the emulsions of the waxes (EC and EA). The treatments were compared with the kraft papers of 60 g/m 2 (Ref 60) and 80 g/m 2 (Ref 80). The scanning electron microscopy images of the surface and the cross sections showed a significant reduction of the voids present in the reference paper (60 g/m 2 ). With the increase of the wax emulsion layer, EC and EA showed a reduction of 87% and 69% in the water vapor permeability (PVA) of 60 g/m 2 paper, respectively. When compared to the 80 g/m 2 paper, this reduction in PVA was even higher (96% and 90%, respectively). When the layers of emulsions were associated with layers of nanoargila (MMT/EC = 2.3 g.mm/dia.m 2 .KPa and MMT/EA = 4.4 g.mm/dia.m 2 .KPa) these obtained

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“…However, PP is a hydrophobic polymer with poor oxygen barrier properties and low affinity with hydrophilic fillers. Cellulose nanofibers (CNF) and nano-sized clays are well known for their hydrophilic fillers that improve polymers’ mechanical strength and oxygen barrier properties [ 4 , 5 , 6 , 7 , 8 ]. CNFs are produced by a variety of materials, such as bleached wood pulp and cotton linters, and exhibit a great performance even with low composite content [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies on the preparation of PP-based composites using cellulose filler and nanoclays, such as bamboo fiber [ 15 ], wheat straw fiber [ 16 ], wood flour [ 17 ], and microcrystalline cellulose (MCC), have already been reported [ 18 , 19 ]. In addition, CNFs are frequently used to form nanocomposites with nanoclay in poly(lactic acid) (PLA) [ 20 , 21 , 22 , 23 ] and paper matrix [ 4 ], leading to hydrophilic polymers. Although there are several examples of hydrophilic polymers, studies on the CNF and nanoclay dispersion in hydrophobic polymers, such as PP have not been performed to date.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Cellulose Nanofiber and Nanoclay as Distributed Phase in a Polypropylene Based Nanocomposite System

Jung

Kang

et al. 2020

Polymers

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Since the plastic-based multilayer films applied to food packaging are not recyclable, it is necessary to develop easily recyclable single materials. Herein, polypropylene (PP)-based cellulose nanofiber (CNF)/nanoclay nanocomposites were prepared by melt-mixing using a fixed CNF content of 1 wt %, while the nanoclay content varied from 1 to 5 wt %. The optimum nanoclay content in the PP matrix was found to be 3 wt % (PCN3), while they exhibited synergistic effects as a nucleating agent. PCN3 exhibited the best mechanical properties, and the tensile and flexural moduli were improved by 51% and 26%, respectively, compared to PP. In addition, the oxygen permeability was reduced by 28%, while maintaining the excellent water vapor permeability of PP. The improvement in the mechanical and barrier properties of PP through the production of PP/CNF/nanoclay hybrid nanocomposites suggested their possible application in the field of food packaging.

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Cellulose nanofibrils/nanoclay hybrid composite as a paper coating: Effects of spray time, nanoclay content and corona discharge on barrier and mechanical properties of the coated papers

Cited by 58 publications

References 29 publications

Strength Improvement of Hydroxypropyl Methylcellulose/ Starch Films Using Cellulose Nanocrystals

Strength Improvement of Hydroxypropyl Methylcellulose/ Starch Films Using Cellulose Nanocrystals

Incorporação de Nanomateriais e emulsão de ceras no desenvolvimento de papéis multicamadas

Synergistic Effect of Cellulose Nanofiber and Nanoclay as Distributed Phase in a Polypropylene Based Nanocomposite System

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