Nanofibrillated Cellulose as an Additive for Recycled Paper

Viana, Lívia Cássia; Potulski, Daniele Cristina; Muñiz, Graciela Inés Bolzón de; Andrade, Alan Sulato de; Silva, Eliane Lopes da

doi:10.1590/01047760201824022518

Cited by 21 publications

(4 citation statements)

References 42 publications

(45 reference statements)

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“…Nanocellulose particles are located in the space between the fibers in the surface layer of paper for bags, act as a binding agent, thereby increasing the number of fiber-fiber bonds through a complex network, increasing the strength of the hydrogen bonds and making the paper more durable. Authors of a number of articles [24,41] also note an improvement in the strength and barrier properties of paper using nanocellulose due to the formation of additional hydrogen bonds.…”

Section: Paper For Bagsmentioning

confidence: 99%

Preparation and application of nanocellulose from Miscanthus × giganteus to improve the quality of paper for bags

2020

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We present the study of the preparation of pulp and nanocellulose from Miscanthus × giganteus to improve the quality of the paper for bags. The organosolv miscanthus pulp (OMP) was prepared by the environmentally friendly organosolv method-cooking in a solution of peracetic acid at the first stage and the alkaline treatment at the second stage. Nanocellulose was obtained by hydrolysis of never-dried OMP and subsequent ultrasonic treatment. Structural changes and crystallinity index of OMP and nanocellulose were studied by SEM and FTIR methods. X-ray diffraction analysis confirmed an increase in the crystallinity of OMP and nanocellulose as a result of thermochemical treatment. The nanocellulose had a density of up to 1.6 g/cm 3 , transparency up to 82%, a crystallinity index of 76.5%, and tensile strength up to 195 MPa. The AFM showed that the particles of nanocellulose have a diameter in the range from 10 to 20 nm. A TGA analysis confirmed that nanocellulose films have a denser structure and lower mass loss in the temperature range 320-440 °C compared to OMP. We established the positive effect of nanocellulose application on the physical and mechanical properties of paper for bags. The application of nanocellulose allows replacing synthetic reinforcing materials and more expensive sulfate unbleached pulp with waste paper in the production of paper and cardboard.

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Section: Paper For Bagsmentioning

confidence: 99%

Preparation and application of nanocellulose from Miscanthus × giganteus to improve the quality of paper for bags

2020

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“…According to its composition, waste paper mass is a polydisperse system with an increased content of small fibers, which have a weak ability to form intermolecular hydrogen bonds and during the formation of a paper sheet, they reduce the mechanical adhesion of fibers, which in general leads to a decrease in the strength of the finished product (Viana et al, 2018). At the same time, the pollution of wastewater due to fiber leaching in paper formation process taken place (Kamali and Khodaparast, 2015).…”

Section: Introductionmentioning

confidence: 99%

Starch Modification to Ensure Resource Savings and Environmental Safety in the Production Cardboard from Waste Paper

Halysh¹,

Трус²,

Tverdokhlib³

et al. 2022

J. Ecol. Eng.

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Development of new and modification of existing chemicals, which act not only as binders, but also provide increased retention of fiber and other pulp components on the paper machine grid, accelerate pulp dehydration, and provide special properties (moisture resistance, heat resistance, improvement of other technical characteristics of paper and cardboard) of paper and cardboard, is an important and urgent task of chemical technology and ecology. This paper presents results of the corn starch modification with epoxypropyltriethanolammonium chloride, hexamethylolmelamine and hexamethylenetetramine. Modified starches provide the necessary strength indicators of cardboard from waste paper and low turbidity of wastewater. The obtained starches can be used in mills that use low-quality waste paper for the production of cardboard and paper products with the aim of saving fiber, reducing wastewater pollution and as a result reducing the negative impact on the environment.

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“…Cellulose is one of the widely used, renewable, and natural polymers. Cellulose fibers, whiskers, or cellulose nanocrystals have a broad range of applications in filtration, textile industry, biomedicine, and as a reinforcing filler in adhesives. − Good mechanical properties, low cost, abundance, good processability, and easy recycling ensure their use in the fabrication of various composite materials. However, because of cellulose polar and hydrophilic nature, cellulose compatibility with nonpolar and hydrophobic materials is limited .…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth of Metal–Organic Framework-5 around Cellulose-Based Fibers Having a Necklace Morphology

et al. 2019

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Herein, metal–organic framework (MOF)-5 crystals were grown on cellulose-based substrates including paper and cotton. Dopamine was used as a surface modification agent to improve the compatibility between MOF-5 crystals and the used substrates. The formed polydopamine film promoted the growth of MOF-5 crystals, which were bonded to the substrates. Besides dopamine, the structure of the substrate also played a major role in the crystal growth. In the case of paper, which had a structure with fibers closely packed to each other, MOF-5 crystals grew only on the surface of fibers (one side) and could easily fall off. Unlike paper, the cotton bulb had a looser structure and MOF-5 crystals grew around the fibers, forming a stable “necklace” morphology. The effects of dopamine modification on the crystal growth and the formation of “necklace” morphology were investigated using scanning electron microscopy analysis. The crystalline structure of MOF-5 was confirmed using X-ray diffraction. To determine how firmly crystals were attached to the cotton fibers, the substrates were exposed to a constant and strong air flow. It was found that the dopamine-modified cotton increased the strength of MOF-5 crystals attached to fibers. This work demonstrated the firm attachment of MOF-5 crystals onto the substrate, facilitating various potential applications.

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Nanofibrillated Cellulose as an Additive for Recycled Paper

Cited by 21 publications

References 42 publications

Preparation and application of nanocellulose from Miscanthus × giganteus to improve the quality of paper for bags

Preparation and application of nanocellulose from Miscanthus × giganteus to improve the quality of paper for bags

Starch Modification to Ensure Resource Savings and Environmental Safety in the Production Cardboard from Waste Paper

Crystal Growth of Metal–Organic Framework-5 around Cellulose-Based Fibers Having a Necklace Morphology

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