Control of retention in paper-making by colloid titration and zeta potential techniques

1998 ◽  
Vol 32 (2) ◽  
pp. 145-155
Author(s):  
F. Carrasco ◽  
P. Mutjé ◽  
M. A. Pelach
Keyword(s):  
Zeta Potential ◽  
Paper Making ◽  
Colloid Titration

Control of retention in paper-making by colloid titration and zeta potential techniques

1998 ◽  
Vol 32 (2) ◽  
pp. 145-155 ◽  
Author(s):  
F. Carrasco ◽  
P. Mutjé ◽  
M. A. Pelach
Keyword(s):  
Zeta Potential ◽  
Paper Making ◽  
Colloid Titration

scholarly journals Preparation and Application of Cationic Modified Cellulose Fibrils as a Papermaking Additive

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yanhong Gao ◽  
Qun Li ◽  
Yu Shi ◽  
Ruitao Cha
Keyword(s):  
Zeta Potential ◽  
Chemical Properties ◽  
Cationic Starch ◽  
Physical Strength ◽  
Tensile Index ◽  
Tear Index ◽  
Colloid Titration ◽  
Cellulose Fibrils ◽  
Physical And Chemical ◽  
Modified Cellulose

This paper deals with cationic modified cellulose fibrils obtained by reacting the cellulose fibrils with 2,3-epoxypropyltrimethylammonium chloride (EPTMAC). The physical and chemical properties of unmodified cellulose fibrils (UMCF) and cationic modified cellulose fibrils (CMCF) were characterized by SEM, FTIR, degree of substitution, colloid titration, zeta potential, and thermogravimetric analysis. The experimental results showed that, after cationization, surface charge density and zeta potential reversed, thermal stability decreased, and new functional groups appeared, while the surface morphology did not show much difference from the UMCF. With the addition of three kinds of additives (UMCF, CMCF, and cationic starch (CS)) to BCTMP, the addition of UMCF and CMCF had little effect on zeta potential, while the addition of CS changed zeta potential obviously. With the increasing of additive amount, the bulk of paper sheets added CMCF did not change obviously, while the bulk of paper sheets added UMCF and CS decreased rapidly. With regard to physical strength, all the three kinds of additives could improve the tensile index and tear index; the tensile index of paper sheets added CS was higher than that of added UMCF and CMCF, while the tear index of paper sheets added CMCF was the highest among the three additives.

Determination of partially hydrolyzed polyacrylamide in wastewater produced from polymer flooding by colloid titration

2013 ◽  
Vol 33 (4) ◽  
pp. 345-350
Author(s):  
Shenwen Fang ◽  
Ming Duan ◽  
Yini Xia ◽  
Hu Wang ◽  
Linyu Li
Keyword(s):  
Food Service ◽  
Polymer Flooding ◽  
Service Industries ◽  
Paper Making ◽  
Partially Hydrolyzed Polyacrylamide ◽  
Hydrolysis Degree ◽  
Colloid Titration ◽  
Materials Used ◽  
Hydrolyzed Polyacrylamide

Abstract Colloid titration has been widely used to determine the charge carried by macromolecules and the concentration of anionic and cationic polyelectrolytes in paper making and food service industries. This method is simple and the materials used are non-volatile and harmless, but it has not previously been used to determine the partially hydrolyzed polyacrylamide (HPAM) in wastewater produced from polymer flooding. In this paper, colloid titration was used to determine the HPAM in wastewater produced from polymer flooding in an oilfield. When the HPAM concentration (Cp) was <200 mg/l, the relationship between the Cp and the titration value (Vp) was linear. This linear relationship was influenced by the pH of wastewater and the hydrolysis degree of HPAM; Vp increased with the pH and the hydrolysis degree. However, it was independent of the concentration of solubilized crude oil and salt concentration in the wastewater and the molecular weight of the HPAM. Recovery tests showed that the determination of HPAM in the wastewater by colloid titration was reliable. It was also found that the colloid titration and starch iodide method had similar accuracies for determination of the HPAM and that colloid titration was a better method for the analyst.

Economy in Paper Making

1889 ◽  
Vol 28 (707supp) ◽  
pp. 11293-11294
Author(s):  
George E. Davis ◽  
P. Duxbury
Keyword(s):  
Paper Making

How to use alum with cationic dispersed rosin size

TAPPI Journal ◽  
2016 ◽  
Vol 15 (5) ◽  
pp. 331-335 ◽  
Author(s):  
LEBO XU ◽  
JEREMY MYERS ◽  
PETER HART
Keyword(s):  
Zeta Potential ◽  
Colloidal Particles ◽  
Streaming Potential ◽  
Excessive Amount ◽  
Paper Machine ◽  
Optimum Amount ◽  
Potential Measurement ◽  
Streaming Current ◽  
Wide Range ◽  
Laboratory Results

Retention of cationic dispersed rosin size was studied via turbidity measurements on stock filtrate with different alum and dispersed rosin size dosages. Stock charge characteristics were analyzed using both an analysis of charge demand determined via a streaming current detector and an evaluation of zeta potential of the fibers by streaming potential measurement. The results indicated that an optimum amount of alum existed such that good sizing retention was maintained throughout a wide range of dispersed rosin size dosages. However, when an excessive amount of alum was used and fines and colloidal particles were transitioned from anionic to cationic, the cationic size retention was reduced. Laboratory results were confirmed with a paper machine trial. All data suggested that a stock charge study was necessary to identify optimal alum dosage for a cationic dispersed rosin sizing program.

Application Fuzzy Logic System for Accurate Sheet Trim Shower Position

2019 ◽  
Vol 3 (1) ◽  
pp. 186-192
Author(s):  
Yudi Wibawa
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Dc Motor ◽  
Automation System ◽  
Paper Making ◽  
System A ◽  
Accurate Position ◽  
And Performance ◽  
Better Than ◽  
Logic System

This paper aims to study for accurate sheet trim shower position for paper making process. An accurate position is required in an automation system. A mathematical model of DC motor is used to obtain a transfer function between shaft position and applied voltage. PID controller with Ziegler-Nichols and Hang-tuning rule and Fuzzy logic controller for controlling position accuracy are required. The result reference explains it that the FLC is better than other methods and performance characteristics also improve the control of DC motor.

An Experimental Investigation on Thermal Conductivity and Viscosity of Graphene doped CNTs /TiO2 Nanofluid

2020 ◽  
Vol 17 (3) ◽  
Author(s):  
A.M. Zetty Akhtar ◽  
M.M. Rahman ◽  
K. Kadirgama ◽  
M.A. Maleque
Keyword(s):  
Thermal Conductivity ◽  
Zeta Potential ◽  
Base Fluid ◽  
Minimum Quantity Lubrication ◽  
Cutting Fluid ◽  
Cutting Zone ◽  
Observation Method ◽  
The Stability ◽  
The Relationship ◽  
Zeta Potential Analysis

This paper presents the findings of the stability, thermal conductivity and viscosity of CNTs (doped with 10 wt% graphene)- TiO2 hybrid nanofluids under various concentrations. While the usage of cutting fluid in machining operation is necessary for removing the heat generated at the cutting zone, the excessive use of it could lead to environmental and health issue to the operators. Therefore, the minimum quantity lubrication (MQL) to replace the conventional flooding was introduced. The MQL method minimises the usage of cutting fluid as a step to achieve a cleaner environment and sustainable machining. However, the low thermal conductivity of the base fluid in the MQL system caused the insufficient removal of heat generated in the cutting zone. Addition of nanoparticles to the base fluid was then introduced to enhance the performance of cutting fluids. The ethylene glycol used as the base fluid, titanium dioxide (TiO2) and carbon nanotubes (CNTs) nanoparticle mixed to produce nanofluids with concentrations of 0.02 to 0.1 wt.% with an interval of 0.02 wt%. The mixing ratio of TiO2: CNTs was 90:10 and ratio of SDBS (surfactant): CNTs was 10:1. The stability of nanofluid checked using observation method and zeta potential analysis. The thermal conductivity and viscosity of suspension were measured at a temperature range between 30˚C to 70˚C (with increment of 10˚C) to determine the relationship between concentration and temperature on nanofluid’s thermal physical properties. Based on the results obtained, zeta potential value for nanofluid range from -50 to -70 mV indicates a good stability of the suspension. Thermal conductivity of nanofluid increases as an increase of temperature and enhancement ratio is within the range of 1.51 to 4.53 compared to the base fluid. Meanwhile, the viscosity of nanofluid shows decrements with an increase of the temperature remarks significant advantage in pumping power. The developed nanofluid in this study found to be stable with enhanced thermal conductivity and decrease in viscosity, which at once make it possible to be use as nanolubricant in machining operation.

Incorporation of micro/nanoparticles of PCL with essential oil of Cymbopogon nardus in bacterial cellulose

2018 ◽  
Vol 1 (2) ◽  
pp. 37
Author(s):  
Aline Krindges ◽  
Vanusca Dalosto Jahno ◽  
Fernando Morisso
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Essential Oil ◽  
Zeta Potential ◽  
Bacterial Cellulose ◽  
Culture Medium ◽  
Static Culture ◽  
Cymbopogon Nardus ◽  
Cellulose Membranes

Incorporation studies of particles in different substrates with herbal assets growing. The objective of this work was the preparation and characterization of micro/nanoparticles containing cymbopogon nardus essential oil; and the incorporation of them on bacterial cellulose. For the development of the membranes was used the static culture medium and for the preparation of micro/nanoparticles was used the nanoprecipitation methodology. The incorporation of micro/nanoparticles was performed on samples of bacterial cellulose in wet and dry form. For the characterization of micro/nanoparticles were carried out analysis of SEM, zeta potential and particle size. For the verification of the incorporation of particulate matter in cellulose, analyses were conducted of SEM and FTIR. The results showed that it is possible the production and incorporation of micro/nanoparticles containing essential oil in bacterial cellulose membranes in wet form with ethanol.

Development of Ceramic Blade with Sensor and the Effect of Spectra Foil Sensor System for Paper Making

2008 ◽  
Vol 62 (1) ◽  
pp. 35-39
Author(s):  
Takeshi Shirao ◽  
Kenji Yamauchi ◽  
Satoshi Nakamura
Keyword(s):  
Sensor System ◽  
Paper Making
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