Colloidal properties of precipitated calcium carbonate dispersion and its effect on prevulcanised natural rubber latex rheology and film tensile properties

Singh, Manroshan; Sharib, Shabinah Filza Mohd; Mok, Kok Lang; Yatim, Amir Hashim

doi:10.1007/s42464-019-00009-8

Cited by 4 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, commercial hand mold, porcelain slip and porcelain hand mold fired at 1270 ∘ C had the zeta potential values higher than that of bone china slip and bone china hand mold fired at 1270 ∘ C. However, bone china hand mold fired at 1270 ∘ C was the most suitable for natural rubber latex because the zeta potential values of bone china hand mold was close to natural rubber latex at pH 10.5 to form solid gel or latex film casting. The obtained zeta potential was in the range ± 40 to ± 60 mV meaning of good stability whereas the zeta potential was higher than ± 60 mV meaning excellent stability [2,[34][35][36]. In addition, the bone china contained alumina content (41.99%wt) higher than that of porcelain (22.60%wt).…”

Section: Physical and Chemical Properties Of Ceramic Hand Moldsmentioning

confidence: 90%

Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

Tharasana

Wongaunjai

Sornsanee

et al. 2020

Reviews on Advanced Materials Science

View full text Add to dashboard Cite

In general, the main compositions of porcelain and bone china composed of 54-65%wt silica (SiO2), 23-34% wt alumina (Al2O3) and 0.2-0.7%wt calcium oxide (CaO) suitable for preparation high quality ceramic products such as soft-hard porcelain products for teeth and bones, bioceramics, IC substrate and magneto-optoelectroceramics. The quality of ceramic hand mold is depended on raw material and its properties (pH, ionic strength, solid-liquid surface tension, particle size distribution, specific surface area, porosity, density, microstructure, weight ratio between solid and water, drying time, and firing temperatures). The suitable firing conditions for porcelain and bone china hand-mold preparation were firing at 1270°C for 10 h which resulted in superior working molds for making latex films from natural and synthetic rubber. The obtained fired porcelain hand molds at 1270°C for 10 h provided good chemical durability (10%NaOH, 5%HCl and 10%wtNaCl), low thermal expansion coefficient (5.8570 × 10−6 (°C−1)), good compressive (179.40 MPa) and good flexural strength (86 MPa). While thermal expansion coefficient, compressive and flexural strength of obtained fired bone china hand molds are equal to 6.9230 × 10−6 (°C−1), 128.40 and 73.70 MPa, respectively, good acid-base-salt resistance, a smooth mold surface, and easy hand mold fabrication. Both obtained porcelain and bone china hand molds are a low production cost, making them suitable for natural and synthetic rubber latex glove formation.

show abstract

Section: Physical and Chemical Properties Of Ceramic Hand Moldsmentioning

confidence: 90%

Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

Tharasana

Wongaunjai

Sornsanee

et al. 2020

Reviews on Advanced Materials Science

View full text Add to dashboard Cite

show abstract

“…PANI can be mixed with other polymeric materials such as elastomers to overcome its lack of mechanical properties [10][11][12][13]. Prevulcanized latex (PVL) is a good choice for fabricating latex composite materials because it has good mechanical properties and can be stored for prolonged periods at ambient temperature [14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Novel Nanosized Polyaniline

Banjar,

Joynal Abedin,

Fizal

et al. 2023

Polymers

View full text Add to dashboard Cite

Polyaniline (PANI) is a conductive polymer easily converted into a conducting state. However, its limited mechanical properties have generated interest in fabricating PANI composites with other polymeric materials. In this study, a PANI–prevulcanized latex composite film was synthesized and fabricated in two phases following chronological steps. The first phase determined the following optimum parameters for synthesizing nanosized PANI, which were as follows: an initial molar ratio of 1, a stirring speed of 600 rpm, a synthesis temperature of 25 °C, purification via filtration, and washing using dopant acid, acetone, and distilled water. The use of a nonionic surfactant, Triton X-100, at 0.1% concentration favored PANI formation in a smaller particle size of approximately 600 nm and good dispersibility over seven days of observation compared to the use of anionic sodium dodecyl sulfate. Ultraviolet–visible spectroscopy (UV-Vis) showed that the PANI synthesized using a surfactant was in the emeraldine base form, as the washing process tends to decrease the doping level in the PANI backbone. Our scanning electron microscopy analysis showed that the optimized synthesis parameters produced colloidal PANI with an average particle size of 695 nm. This higher aspect ratio explained the higher conductivity of nanosized PANI compared to micron-sized PANI. Following the chronological steps to determine the optimal parameters produced a nanosized PANI powder. The nanosized PANI had higher conductivity than the micron-sized PANI because of its higher aspect ratio. When PANI is synthesized in smaller particle sizes, it has higher conductivity. Atomic force microscopy analysis showed that the current flow is higher across a 5 µm2 scanned area of nanosized PANI because it has a larger surface area. Thus, more sites for the current to flow through were present on the nanosized PANI particles.

show abstract

“…The conductive properties of these CPs attributed to the structure of the polymer backbone containing conjugated π system [5]. Prevulcanised latex (PVL) is a good choice for fabricating latex composite materials because it has good mechanical properties and can be stored for longer periods of time at ambient temperature [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Novel Nanosized Polyaniline

Banjar¹,

Abedin²,

Fizal³

et al. 2023

Preprint

View full text Add to dashboard Cite

Polyaniline or PANI is a conductive polymer (CPs) with flexibility in turning into conducting properties. The drawback is mainly in terms of limited mechanical properties improvement which attracted the interest in fabrication of PANI with other polymeric materials. PANI-PVL composites film was synthesized and fabricated in this work with chronological steps according to the objectives aligned in two different phases. The first phase determines the optimum parameters to synthesize nanosized PANI. The ideal initial molar ratio, r was 1, stirring speed of 600 rpm, purified by filtration, synthesis temperature of 25 oC, washed by dopant acid, acetone and distilled water. The usage of non-ionic surfactant, Triton X-100 (TX100) with 0.1 % concentration favours the formation of smaller particle size of PANI and good dispersibility compared to the usage of anionic sodium dodecyl sulphate (SDS). The synthesis of PANI in nanosized dimension has the potential to be applied for antimicrobial applications such as gloves and antimicrobial coating of frequent contact points in the near future.

show abstract

Colloidal properties of precipitated calcium carbonate dispersion and its effect on prevulcanised natural rubber latex rheology and film tensile properties

Cited by 4 publications

References 20 publications

Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

Synthesis and Characterization of a Novel Nanosized Polyaniline

Synthesis and Characterization of Novel Nanosized Polyaniline

Contact Info

Product

Resources

About