Non-Wood Fibers: Relationships of Fiber Properties with Pulp Properties

The mechanical properties of individual fibers are related to the production and performance of papers and fiberboards. This paper examines the behavior of the microstructure constituents of wood subjected to acid and alkali treatments. The chemical structure and mechanical properties of wood cell walls with different acid or alkali treatments was analyzed. The results show that, compared with acid treatment, the crystal size and crystallinity index of cellulose increased after alkali treatment, resulting in an increase in the cell wall elastic modulus. The mechanical properties of the wood cell wall S2 region were higher than those of the compound middle lamella (CML) region. There was a topochemical effect between the CML and the S2 region in acid and alkali-treated samples, which provided a major threshold that facilitates the production/separation of wood fibers for better strength fiber properties.

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Experiment of CRMP on Oil Palm Empty Fruit Bunch Biomass Utilization

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.197.707 ◽

2012 ◽

Vol 197 ◽

pp. 707-711 ◽

Cited By ~ 1

Author(s):

Feng Zhen Cheng ◽

You Ming Li ◽

Jian Hu

Keyword(s):

Oil Palm ◽

Short Description ◽

Empty Fruit Bunch ◽

Fiber Fracture ◽

Biomass Utilization ◽

Fiber Properties ◽

Second Stage ◽

Pulp Properties ◽

High Consistency ◽

Fiber Interaction

In this paper, we focus on the possibility for Oil Palm Empty Fruit Bunch (OPEFB) Biomass Utilization by experimenting with chemi-refiner mechanical pulping (CRMP). To understand the process of CRMP, a short description of five comparable experiments and effects of refiner plate dam on coarse pulp properties is given. Plate dams offer a chance to utilize different alternatives needed to defibrate OPEFB and develop fiber in a more efficient way. From the experimental results, we also assume the possibility of a refining mechanism of defibration by friction of fiber to fiber interaction occurring mainly at the primary stage high consistency refining; the second stage is for fiber properties development by fibrillation at medium consistency. The effect of the undammed refiner plates is cutting more than fibrillation at high consistency, and fibrillation more than cutting at mid-consistency; The effect of the dammed plates is more friction than cutting at high consistency and more fiber fracture at medium consistency.

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Comprehensive evaluation of kraft pulp properties from fast-growing woods

TAPPI Journal ◽

10.32964/tj9.6.34 ◽

2010 ◽

Vol 9 (6) ◽

pp. 34-39

Author(s):

AIYU QU ◽

YANHUI AO ◽

JUN YAN ◽

GUIGAN FANG

Keyword(s):

Kraft Pulp ◽

Comprehensive Evaluation ◽

Evaluation Model ◽

Evaluation Index System ◽

Evaluation Index ◽

Wood Cellulose ◽

Fuzzy Matrix ◽

Fast Growing ◽

Pulp Properties ◽

Evaluation Index Systems

To develop new wood cellulose resources and fast-growing pulpwood plantation fiber sources, it is very important to evaluate their pulping properties. A comprehensive multi-index pulping-suitability evaluation model is investigated in this paper by considering four fast-growing wood species. First, a new evaluation-index system for kraft pulp was developed based on traditional evaluation-index systems. Then, the membership degree of every index was analyzed to obtain a fuzzy matrix. The proportional contribution of each parameter to the main pulping properties could then be determined. Finally, a comprehensive evaluation model of kraft pulp properties was developed. The model is reliable compared with traditional assessment methods. The results confirmed the feasibility and rationality of developing new wood cellulose resources and fast-growing pulpwood plantations using fuzzy comprehensive evaluations.

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Refining Energy Reduction and Pulp Characteristic Modification of Alkaline Peroxide Mechanical Pulp (APMP) Through Enzyme Application

TAPPI Journal ◽

10.32964/tj8.5.19 ◽

2009 ◽

Vol 8 (5) ◽

pp. 19-25 ◽

Cited By ~ 2

Author(s):

PETER W. HART ◽

DARRELL M. WAITE ◽

LUC THIBAULT, ◽

JOHN TOMASHEK ◽

MARIE-EVE ROUSSEAU ◽

...

Keyword(s):

Wood Chip ◽

The United States ◽

Enzyme Treatment ◽

Chemical Application ◽

Alkaline Peroxide ◽

Eucalyptus Wood ◽

Pulp Properties ◽

Pulp Processing ◽

Two Stages ◽

Enzyme Application

Eucalyptus wood chips were subjected to impregnation with various blends of novel fiber modify-ing enzymes before chemical pretreatment and two stages of refining using the preconditioning refiner chemical–alkaline peroxide mechanical pulping (PRC-APMP) process. Wood chip impregnation and pulp processing was con-ducted at a pilot plant in the United States. When compared under constant chemical application and at a constant 350 mL CSF, enzyme treatment reduced specific refining energy by at least 24%. The effect of one versus two stages of impregnation and of enzyme action upon several physical pulp properties was determined.

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Does the kappa number method accurately reflect lignin content in nonwood pulps?

TAPPI Journal ◽

10.32964/tj17.11.611 ◽

2018 ◽

Vol 17 (11) ◽

pp. 611-617

Author(s):

Sabrina Burkhardt

Keyword(s):

Lignin Content ◽

Paper Industry ◽

Pulp And Paper Industry ◽

Original Data ◽

Kappa Number ◽

Klason Lignin ◽

Organic Functional Groups ◽

Pulp Properties ◽

Wood Pulps ◽

Hexenuronic Acid

The traditional kappa number method was developed in 1960 as a way to more quickly determine the level of lignin remaining in a completed or in-progress pulp. A significantly faster approach than the Klason lignin procedure, the kappa number method is based on the reaction of a strong oxidizing agent (KMnO4) with lignin and small amounts of other organic functional groups present in the pulp, such as hexenuronic acid. While the usefulness of the kappa number for providing information about bleaching requirements and pulp properties has arguably transformed the pulp and paper industry, it has been mostly developed for kraft, sulfite, and soda wood pulps. Nonwood species have a different chemical makeup than hardwood or softwood sources. These chemical differ-ences can influence kappa and Klason measurements on the pulp and lead to wide ranges of error. Both original data from Sustainable Fiber Technologies’ sulfur and chlorine-free pulping process and kappa and Klason data from various nonwood pulp literature sources will be presented to challenge the assumption that the kappa number accurately represents lignin content in nonwood pulps.

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PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

Jurnal Riset Industri Hasil Hutan ◽

10.24111/jrihh.v4i1.1195 ◽

2012 ◽

Vol 4 (1) ◽

pp. 1

Author(s):

Djoko Purwanto

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Physical Properties ◽

Treatment Process ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Wood Fibers ◽

Test Parameters ◽

Mechanical And Physical Properties ◽

Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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