Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Ambegoda, Vihanga Thejasri; Egodage, SM; Blum, Frank D.; Maddumaarachchi, Madhubhashini

doi:10.1002/app.50047

Cited by 19 publications

(9 citation statements)

References 15 publications

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“…WCA values categorized the wettability of the surface of coatings. The surfaces with WCA values >90° are considered hydrophobic, while WCA values >150° are superhydrophobic . The WCA measurements of the NR-based coatings produced from chloroform (CHF) and toluene (TOL) presented values of 94.3 and 93.1°, respectively (Table S2).…”

Section: Resultsmentioning

confidence: 99%

Silica Nanoparticles Modified with Fluorescent Dyes as Probes for in Situ Characterization of Natural Rubber Coatings

Oliveira

Paula

Maia

et al. 2022

ACS Appl. Nano Mater.

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In this study, we used fluorescent silica particles (SiPs) as probes to characterize the chemical stability of natural rubber (NR)-based coatings in situ without extensive sample preparation. By tuning the size, concentration, and surface charge of the SiPs and the type of solvent, we obtained two distinct NR-SiPs coatings: (1) irregular honeycomb patterns and (2) flat surfaces. Raman spectral mapping was used to investigate the chemical structure and to illustrate the spatial heterogeneity of the multiple components of the NR-SiPs coatings. The stability of the NR-SiPs coatings was assessed under fluid shear force stress and at high ionic strength conditions (NaCl, 0.85% w/v) using a perfusion chamber coupled with a confocal laser scanning microscope. By evaluating the fluorescent signal of the SiPs, we determined their distribution in the NR-based coatings and monitored their chemical stability via in situ confocal imaging. Using the fluorescent SiPs as probes, we could infer the high chemical stability of the coatings at high ionic strength and under shear stress conditions, opening new horizons for the application of NR coatings in medicine, microelectronics, and the automobile industry.

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Section: Resultsmentioning

confidence: 99%

Silica Nanoparticles Modified with Fluorescent Dyes as Probes for in Situ Characterization of Natural Rubber Coatings

Oliveira

Paula

Maia

et al. 2022

ACS Appl. Nano Mater.

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“…Some studies also found it useful for improving the excellent electromagnetic interference (EMI) properties of rubber composites. , Thus, MoS 2 emerged as a material of interest and was used in the present study. The other material of interest used as a filler in rubber composites in the present work is D.E . Alam et al show that D.E.…”

Section: Introductionmentioning

confidence: 87%

“…The other material of interest used as a filler in rubber composites in the present work is D.E. 25 Alam et al 26 show that D.E. contains various functional groups on its outer and inner octahedral sheets and leads to robust interfacial interactions in the composite.…”

Section: ■ Introductionmentioning

confidence: 94%

Mimicking Self-Powered Piezoelectric Energy-Generating Behavior in Silicone Rubber Composites under Compressive and Tensile Strains

Kumar,

Alam,

Yewale

et al. 2024

ACS Appl. Electron. Mater.

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This study used a multifunctional and versatile silicone rubber, which can be vulcanized at room temperature, as the stretchable elastomeric matrix. Then, reinforcing fillers such as molybdenum disulfide (MoS 2 ), diatomaceous earth (D.E.), and hybrids were used. Our results showed that the compressive modulus and tensile strength are improved after the addition of these reinforcing fillers. For example, the compressive modulus of the control sample was 1.93 MPa, and it increased to 6.1 MPa (D.E.), 2.47 MPa (MoS 2 ), and 3.3 MPa for their hybrid at 20 phr. Similarly, the tensile strength of the control sample was 0.52 MPa, and it increased to 1.42 MPa (D.E.), 0.87 MPa (MoS 2 ), and 0.83 MPa for their hybrid at 20 phr. We also conducted energy-harvesting experiments and found that the voltage output was higher for the compressive mode sets by 8−11 times than for the tensile mode sets, even under similar strain magnitudes. For instance, the output voltage at 30% strain for MoS 2 -filled composites was approximately 0.65 mV for compressive mode and 0.06 mV for tensile mode. Moreover, the energy harvesting was higher for hybrid-filled systems due to the synergistic effect than for D.E. or MoS 2 as the only filler in the composites. For example, the output voltage was 1.22 mV (MoS 2 ), 0.37 mV (D.E.), and 5.5 mV (hybrid) at 15 phr loading. Similarly, in real-time monitoring, compressive mode generated a higher voltage than tensile mode. Overall, the promising voltage output performance developed in the present work shows great potential for the future of smart health monitoring.

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“…This fact may hinder the production of NRL and NR devices suitable for biomedical purposes since the polymer chains limit the manufacturing of high-porous biomaterials. Although NRL is inherently hydrophilic, after the drying process, it becomes predominantly hydrophobic [101] . For biomedical applications, a surface with hydrophilic property is needed for adhesion, dissemination, and cell proliferation [102] .…”

Section: Comparison With Other Biopolymersmentioning

confidence: 99%

Latex and natural rubber: recent advances for biomedical applications

et al. 2022

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Recently, latex (NRL) and natural rubber (NR) from Hevea brasiliensis have emerged as promising biomaterials from renewable sources for biomedical applications. Although some attempts at commercial applications have been made, there is a need to comprehensively document the state-of-the-art of these biopolymers for biomedical applications and regenerative medicine. Here we present the recent advances in the development of NRL and NR as biomedical materials with potential properties including biocompatibility and biodegradability. Due to the angiogenic properties of NRL and NR, well-defined functional materials can be used for drug delivery systems (oral/transdermal), scaffolds for skin and bone regeneration, and dressings for wound healing. The incorporation of drugs, nanoparticles, cells, and others into NRL and NR polymer chains offers a wide range of applications such as dressings with antimicrobial activity and sustained release systems. Concluding remarks on the growth of these biomaterials for biomedical applications and regenerative medicine were discussed.

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Enhancement of hydrophobicity of natural rubber latex films using diatomaceous earth

Cited by 19 publications

References 15 publications

Silica Nanoparticles Modified with Fluorescent Dyes as Probes for in Situ Characterization of Natural Rubber Coatings

Silica Nanoparticles Modified with Fluorescent Dyes as Probes for in Situ Characterization of Natural Rubber Coatings

Mimicking Self-Powered Piezoelectric Energy-Generating Behavior in Silicone Rubber Composites under Compressive and Tensile Strains

Latex and natural rubber: recent advances for biomedical applications

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