Micro-nanofibrillated cellulose preparation from bleached softwood pulp using chemo-refining approach and its evaluation as strength enhancer for paper properties

2020 ◽  
Author(s):  
Varun Kumar ◽  
Puneet Pathak ◽  
Nishi Kant Bhardwaj
Keyword(s):  
Nanofibrillated Cellulose ◽  
Paper Properties ◽  
Softwood Pulp ◽  
Micro Nanofibrillated Cellulose

Does kraft hardwood and softwood pulp viscosity correlate to paper properties?

TAPPI Journal ◽  
2016 ◽  
Vol 15 (10) ◽  
pp. 643-651 ◽  
Author(s):  
ROBERT J. OGLESBY ◽  
HUMPHREY J. MOYNIHAN ◽  
RICARDO B. SANTOS ◽  
ASHOK GHOSH ◽  
PETER W. HART
Keyword(s):  
Physical Properties ◽  
Strength Loss ◽  
Strength Properties ◽  
Clear Correlation ◽  
Paper Properties ◽  
Physical Strength ◽  
Pulp Viscosity ◽  
Softwood Pulp ◽  
The Impact ◽  
Related Paper

The impact of commercially prepared, fully bleached pulp viscosity variation on handsheet physical properties was evaluated at different levels of pulp refining. Hardwood pulps from the same brownstock species mix, cooking parameters, and kappa numbers were processed through two different commercial bleach plants: one with a D0(EP)D1D2 sequence and the second with an OD0(EOP)D1 sequence. Additionally, a commercial softwood (predominately Scotts pine) brownstock pulp bleached by an OD0(EP)D1D2 sequence was employed in this study. Pulps with viscosities ranging from 14 to 21 mPa∙s were refined in a Valley beater to two freeness levels, and the associated handsheet physical properties were measured in this study. Over the pulp viscosity range of 14 to 21 mPa∙s, no clear correlation was found to exist between pulp viscosity and related paper physical properties. Finally, a series of laboratory prepared bleached pulps were purposely prepared under non-ideal conditions to reduce their final viscosities to lower values. Handsheets made from these pulps were tested in their unbeaten condition for physical strength properties. Significant and rapid strength loss occurred when the measured pulp viscosity dropped below 12 mPa∙s; overall strength properties showed no correlation to viscosity above the critical 12 mPa∙s value.

scholarly journals Acetylation improves thermal stability and transmittance in FOLED substrates based on nanocellulose films

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3619-3625 ◽  
Author(s):  
Shuang Yang ◽  
Qiuxia Xie ◽  
Xiuyu Liu ◽  
Min Wu ◽  
Shuangfei Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Pressure ◽  
Nanofibrillated Cellulose ◽  
High Pressure Homogenization ◽  
Mechanical Grinding ◽  
Homogenization Process ◽  
Softwood Pulp

Bleached softwood pulp was used to prepare nanofibrillated cellulose (NFC) by mechanical grinding and a high-pressure homogenization process.

Influences of Bleached Softwood Pulp Pretreated with Endo-Cellulase on Fiber Surface Properties and Aggregation Structure

2011 ◽  
Vol 391-392 ◽  
pp. 692-696
Author(s):  
Min Du ◽  
Xin Ping Li ◽  
Wu Guang Li
Keyword(s):  
Energy Consumption ◽  
Fiber Surface ◽  
Paper Sheet ◽  
Paper Properties ◽  
Enzymatic Pretreatment ◽  
Wetting Properties ◽  
Tear Index ◽  
Softwood Pulp ◽  
Aggregation Structure ◽  
Refining Performance

The influences of endo-cellulase pretreatment of bleached softwood pulp before refining was investigated in this paper. Refining energy consumption, paper properties, wetting properties, electric charge and aggregation structure of fiber were investigated. The results showed that pretreated with endo-cellulase at the dosage of 0.4ECG/g before refining could increase the refining degree by 53.09%, and it would reduce refining energy consumption significantly. At this dosage, the tensile index of the paper sheet increased while the tear index of paper sheet decreased slightly. Additionally, enzymatic pretreatment could raise fiber surface wettability, lower the absolute value of Zeta potential and decrease the crystallinity of fiber, which was help to improve refining performance.

scholarly journals Getting Environmentally Friendly and High Added-Value Products from Lignocellulosic Waste

2021 ◽  
Author(s):  
Elizabeth Quintana Rodríguez ◽  
Domancar Orona Tamayo ◽  
José Nicacio González Cervantes ◽  
Flora Itzel Beltrán Ramirez ◽  
María Alejandra Rivera Trasgallo ◽  
...  
Keyword(s):  
Value Added ◽  
Environmentally Friendly ◽  
Barrier Properties ◽  
Nanofibrillated Cellulose ◽  
Global Market ◽  
Added Value ◽  
Lignocellulosic Waste ◽  
Potential Applications ◽  
Cellulose Nanomaterials ◽  
Micro Nanofibrillated Cellulose

In recent years, alternatives have been sought for the reuse of lignocellulosic waste generated by agricultural and other industries because it is biodegradable and renewable. Lignocellulosic waste can be used for a wide variety of applications, depending on their composition and physical properties. In this chapter, we focus on the different treatments that are used for the extraction of natural cellulose fibers (chemical, physical, biological methods) for more sophisticated applications such as reinforcement in biocomposites. Due to the different morphologies that the cellulose can present, depending from sources, it is possible to obtain cellulose nanocrystals (CNCs), micro- nanofibrillated cellulose (MFC/NFC), and bacterial nanocellulose (BNC) with different applications in the industry. Among the different cellulose nanomaterials highlighted characteristics, we can find improved barrier properties for sound and moisture, the fact that they are environmentally friendly, increased tensile strength and decreased weight. These materials have the ability to replace metallic components, petroleum products, and nonrenewable materials. Potential applications of cellulose nanomaterials are present in the automotive, construction, aerospace industries, etc. Also, this chapter exhibits global market predictions of these new materials or products. In summary, lignocellulosic residues are a rich source of cellulose that can be extracted to obtain products with high value-added and eco-friendly characteristics.

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