Recent Progress in Latex Technology

Murphy, E. A.

doi:10.1021/ie50508a027

Cited by 8 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NR foam is prepared from both concentrated natural latex and non-latex rubber [3,4]. It has been used for many years to produce many products, such as mattresses, pillows, dolls, cushions, flooring and upholstery foam [5][6][7][8]. Many processes are used in rubber foam production, but the most popular process is the Dunlop process.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between the Morphology and Elasticity of Natural Rubber Foam Based on the Concentration of the Chemical Blowing Agent

et al. 2021

View full text Add to dashboard Cite

Concentrated natural latex was used to produce a rubber foam that is porous, elastic and well ventilated. The mechanical properties can be either soft or firm, depending on the formulation of the latex used. Briefly, concentrated natural latex was mixed with chemical agents to make the rubber foam on a laboratory scale using the Dunlop process. In this work, we changed the concentration of the chemical blowing agent in the latex. The morphological properties of the rubber foam were characterised using scanning electron microscopy, and the mechanical properties, or elasticity, were studied using compression experiments and the Mooney–Rivlin calculation. The results show that the concentration of the chemical blowing agent affects the morphological properties of the rubber foam but not the mechanical properties, indicating the heterogeneous structure of the rubber foam. The thermodynamic parameters (∆G and ∆S) and the internal energy force per compression force (Fu/F) of the rubber foam with various amounts of chemical blowing agent were also investigated. This study could be applied in the foam industry, particularly for pillow, mattress and insulation materials, as the present work shows the possible novel control of the morphological structure of the rubber foam without changing its mechanical properties. The difference in cell sizes could affect the airflow in rubber foam.

show abstract

Section: Introductionmentioning

confidence: 99%

The Relationship between the Morphology and Elasticity of Natural Rubber Foam Based on the Concentration of the Chemical Blowing Agent

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The truly imposing dimensions of the electrodecantation plant constructed by Dunlop in Malaysia [6] for the creaming of rubber latex seemed to prove that there is no obvious theoretical or experimental reason why electrophoresis could not be applied on an equally large scale as other electrically driven processes, such as electrolysis, electrodialysis, electroplating, etc. To the disappointment of this author and many other electrophoreticists, that plant remained a white elephant and did not usher in an era of further proliferation.…”

Section: Discussionmentioning

confidence: 99%

“…The alternative is the design of electrophoretic instruments specifically intended for macro-preparations [2, 31. Much of preparative electrophoresis can be clearly traced to the discovery of electrodecantation by Pauli [4] in Vienna, some 13 years prior to the Nobel prize-winning work of Tiselius [5]. Pauli's electrodecantation device gave rise to several design modifications and was incorporated in the 1930s in the largest electrophoretic installation yet constructed, a rubber latex creaming plant in Malaysia [6]. The basic unit was an assembly of a large number of parallel colloid-impermeable membranes within the direct current (d.c.) electric field.…”

Section: Introduction and Historical Backgroundmentioning

confidence: 99%

Recycling isoelectric focusing and isotachophoresis

Bier

1998

Electrophoresis

View full text Add to dashboard Cite

Of all electrophoretic methods, isoelectric focusing offers the highest resolution and is best suited for preparative applications. Over the years, several instruments were developed for this purpose, all operating in free fluids, in the absence of gels or other supporting matrices. In such systems, the avoidance of gravity or electrically driven convections is essential. Successful stratagems for fluid control included rapid recycling or rotation, in combination with either fine porosity screens or narrow gaps between parallel plates. The most successful apparatus so far is the Rotofor, in which fluid is stabilized by combining horizontal rotation with fine porosity screen partitioning. Recycling isotachophoresis offers the potential of separating proteins at high concentration. A new concept of tangential electrophoresis is described. To optimize the use of these devices for protein separation, low molecular weight, biologically acceptable buffers of known composition are essential. The buffering system developed for this purpose comprises a series of binary buffers that cover the pH range in steps of 1 pH unit or less. The pH gradient can be custom-designed and is of remarkable stability in operation.

show abstract

“…ZnO is also a widely used semiconductor‐type metal oxide in rubber and rubber‐related industries as a curing activator in sulfur‐curing vulcanization systems . ZnO is also used as a preservative agent for centrifuged natural rubber latex (NRL) . In the synthesis of natural rubber latex foam (NRLF) by the Dunlop method, ZnO is used as the primary gelling agent .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the antibacterial activity of natural rubber latex foam by the incorporation of zinc oxide nanoparticles

Rathnayake

Ismail

Baharin

et al. 2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

The synthesis and characterization of ZnO-nanoparticle-incorporated natural rubber latex foam (NRLF) are described in this article. ZnO nanoparticles were added as the primary gelling agent by the replacement of the microsized ZnO particles, whereas the control sample of the NRLF was made without the addition of any ZnO particles. ZnO nanopowder was evaluated by X-ray diffraction (XRD), whereas the aqueous dispersion of nano-ZnO was evaluated by transmission electron microscopy (TEM) micrograph analysis. The modified NRLF materials were evaluated by scanning electron microscopy (SEM)-energy-dispersive X-ray (EDX) analysis and XRD analysis. The antibacterial activities of the modified NRLF samples were evaluated quantitatively and qualitatively by antibacterial susceptibility tests against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli bacteria. We found that the XRD peaks matched perfectly with reference code 98-002-6593, which was the hexagonal phase. The particle sizes given by TEM image analysis were less than 60 nm. Most of the XRD peaks obtained for the modified NRLF matched with that of the ZnO nanopowder; this proved the presence of nano-ZnO in the modified NRLF. Further, it was proven by SEM and EDX analysis. The NRLF modified by nanosized ZnO inhibited the growth of the so-called bacteria in a very strong manner. V C 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39601.

show abstract

Recent Progress in Latex Technology

Cited by 8 publications

References 3 publications

The Relationship between the Morphology and Elasticity of Natural Rubber Foam Based on the Concentration of the Chemical Blowing Agent

The Relationship between the Morphology and Elasticity of Natural Rubber Foam Based on the Concentration of the Chemical Blowing Agent

Recycling isoelectric focusing and isotachophoresis

Enhancement of the antibacterial activity of natural rubber latex foam by the incorporation of zinc oxide nanoparticles

Contact Info

Product

Resources

About