The Effect of Surface Modification on the Properties of Palygorskite Filled Natural Rubber Nanocomposite

Othman, Nadras; Muttalib, Siti Nadzirah Abdul; Ismail, Nurul Ain

doi:10.1002/masy.201600035

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Palygorskite has received considerable attention in the fields of pigments, 5,6 decolorizing agent, 7,8 thickeners, 9,10 colloid, 11,12 mycotoxin adsorbents, [13][14][15][16][17] radioactive material adsorbents, [18][19][20][21] and drilling muds 22,23 for the large number of channels in its internal structure. 24 At the same time, it is widely used in friction materials, 25,26 carrier, 27 catalytic materials, 28 rubber, and plastic composites 29,30 because of the nano-scaled slender rod crystals.…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution and sintering properties of palygorskite nanofibers

Wang

Lijuan

Zhang

et al. 2020

Int J Applied Ceramic Tech

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In this study, the morphological evolution and sintering properties of the palygorskite nanofibers were studied along with the increase of temperature, using raw palygorskite as materials. The palygorskite powder was calcined at different temperatures in the range of 100°C‐1200°C, and the microstructural evolution of the palygorskite nanofibers was investigated by thermogravimetric and differential thermal analysis (TG‐DTA), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and high‐resolution transmission electron microscope (HRTEM). Furthermore, the palygorskite powder was shaped to bars by dry pressing and sintered from 700°C to 1200°C. The properties of the sintered palygorskite were characterized by bending strength, mercury intrusion porosimeter (MIP), and stepwise isothermal dilatometry (SID). The results showed that the morphology of palygorskite nanofibers maintained unchanged till 1000°C. The palygorskite nanofibers molted to bind each other and formed a solid interwoven network structure at 1100°C. Correspondingly, it was shown from the sharply decrease of the sintered palygorskite porosity from 45.46% at 1000°C to 1.82% at 1100°C that the dense sintering of palygorskite started at 1100°C. With the sintering proceeding, some closed micropores fused each other to form bigger opening pores, resulting in a slight increase of porosity at 1200°C. However, the pore size distribution got more uniform and the density of the sintered body increased. So the bending strength of the sintered body reached the maximum of 176.67 Mpa and finally the main crystalline phases of the sintered sample changed to quartz, enstatite, and kyanite. The sintering activation energy of the palygorskite was measured by means of SID with a value of 906.46 kJ·mol−1.

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Section: Introductionmentioning

confidence: 99%

Microstructural evolution and sintering properties of palygorskite nanofibers

Wang

Lijuan

Zhang

et al. 2020

Int J Applied Ceramic Tech

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“…9 Today, polymer field research and industry really emphasize on polymer composites reinforced by nanoclay as they exhibited outstanding properties over conventional polymers. 10 Organically modified layered silicates or nanoclays have become an attractive class of organic–inorganic hybrid materials. These composites exhibit improved tensile strength and moduli, decreased thermal expansion coefficient, decreased gas permeability, enhanced ionic conductivity, and decreased flammability.…”

Section: Introductionmentioning

confidence: 99%

The different reinforcing behavior between siliceous earth nanoparticles and silica on natural rubber

Chen

Song

Gao

et al. 2019

Polymers and Polymer Composites

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The reinforcing behaviors of siliceous earth (SE) nanoparticles and silica on natural rubber (NR) were compared. SE employed in this work was formed by volcanic eruptions 100 million years ago and mainly consists of SiO2 (∼80%), Al2O3 (∼14%), and K2O (∼4%) and is composed of low quartz and illite in crystal structure and with a special flaky and laminated morphology. The effects of SE slurry with different filler loading of 30, 40, 50 per hundred parts of rubber (phr), and 40 phr silica(S-40) were investigated. Mechanical properties were measured, and the results show that 300% modulus, elongation at break, tensile, and tear strength of SE/NR are all higher than those of S-40. Combination results of tensile properties and rubber process analyzer (RPA), the rubber–filler interaction parameter (I) was calculated and the results show the value of I increase slightly with SE loading, while obviously higher than that of S-40. But the results of dynamic mechanical analysis and bound rubber content show that S-40 has obviously lower tan δ and higher bound rubber content, which indicate that there exists stronger rubber–filler interaction between silica and NR. The seemingly conflicting results imply that the effect of the two fillers on the NR network structure should be different. The special morphology of SE can help them to distribute more evenly in the NR matrix, making it less likely to form particle networks and providing very strong filler–rubber interaction, while showing higher average rubber–filler interaction and results in better mechanical properties of SE/NR composites.

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“…To date, there are only a limited number of studies regarding on clay/NR nanocomposites obtained by straightforward LCT [19,20,21,22]. In these reports, nanocomposites are generated from a coagulation process, activated by electrolytes as suitable coagulating agents.…”

Section: Introductionmentioning

confidence: 99%

A Green Approach for Preparing High-Loaded Sepiolite/Polymer Biocomposites

et al. 2018

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Global industry is showing a great interest in the field of sustainability owing to the increased attention for ecological safety and utilization of renewable materials. For the scientific community, the challenge lies in the identification of greener synthetic approaches for reducing the environmental impact. In this context, we propose the preparation of novel biocomposites consisting of natural rubber latex (NRL) and sepiolite (Sep) fibers through the latex compounding technique (LCT), an ecofriendly approach where the filler is directly mixed with a stable elastomer colloid. This strategy favors a homogeneous dispersion of hydrophilic Sep fibers in the rubber matrix, allowing the production of high-loaded sepiolite/natural rubber (Sep/NR) without the use of surfactants. The main physicochemical parameters which control Sep aggregation processes in the aqueous medium were comprehensively investigated and a flocculation mechanism was proposed. The uniform Sep distribution in the rubber matrix, characteristic of the proposed LCT, and the percolative filler network improved the mechanical performances of Sep/NR biocomposites in comparison to those of analogous materials prepared by conventional melt-mixing. These outcomes indicate the suitability of the adopted sustainable procedure for the production of high-loaded clay–rubber nanocomposites with remarkable mechanical features.

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The Effect of Surface Modification on the Properties of Palygorskite Filled Natural Rubber Nanocomposite

Cited by 8 publications

References 29 publications

Microstructural evolution and sintering properties of palygorskite nanofibers

Microstructural evolution and sintering properties of palygorskite nanofibers

The different reinforcing behavior between siliceous earth nanoparticles and silica on natural rubber

A Green Approach for Preparing High-Loaded Sepiolite/Polymer Biocomposites

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