Correlation between Physico-Mechanical and Rheological Properties of Rubber Compounds Based on NR-BR with C-C Gel Content in Polybutadiene

Ganjali, Saeed Taghvaei; Motiee, Fereshteh; Tabatabaie, Zohreh Ghazi

doi:10.7317/pk.2014.38.4.425

Cited by 7 publications

(6 citation statements)

References 38 publications

(11 reference statements)

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“…39 A C=C group appears at 1619 cm −1 , 34 and the C−C group corresponds to 1263 cm −1 . 40 The bands at approximately 3050, 2922, and 963 cm −1 are assigned to the C−H group. 41 There is an O−H group at 3147 and 1385 cm −1 .…”

Section: Resultsmentioning

confidence: 98%

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Micro-Nano Hierarchical Dendritic Structures for Droplet Curve Manipulation: Implications for Microfluidic Devices

Wang

et al. 2020

ACS Appl. Nano Mater.

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Directional droplet manipulation has wide potential applications in many fields, such as microfluidic devices and liquid transportation. Herein, micro-nano hierarchical dendritic structures were fabricated for droplet curve manipulation, which may have implications for microfluidic devices. The formation of superhydrophobicity was promoted by micro-nano hierarchical dendritic structures and carbon pollutants adsorbed during heating. An S-shaped curve directly drawn on the superhydrophobic surface with the tip of a syringe was used to show the droplet transportation along a curved route. The obtained superhydrophobic area had a water contact angle (WCA) of approximately 165°and a water slide angle (WSA) of almost 0°. The S-shaped curve exhibited high hydrophobicity with a WCA parallel to the curve of approximately 145°and perpendicular to the curve of approximately 138°. The as-fabricated surface exhibited a good curve manipulation property by repelling continuous water droplets from the superhydrophobic area to the S-shaped hydrophobic curve with no residual droplet on the route. In addition, the relationship between the droplet volume and the critical tilting angle was studied, which may play a certain guiding role in droplet manipulation. This method is expected to pave the way for droplet manipulation in microfluidic devices.

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Section: Resultsmentioning

confidence: 98%

“…The broad peak at 2102 cm –1 is assigned to the C≡O stretching . A C=C group appears at 1619 cm –1 , and the C–C group corresponds to 1263 cm –1 . The bands at approximately 3050, 2922, and 963 cm –1 are assigned to the C–H group .…”

Section: Resultsmentioning

confidence: 98%

Micro-Nano Hierarchical Dendritic Structures for Droplet Curve Manipulation: Implications for Microfluidic Devices

Wang

et al. 2020

ACS Appl. Nano Mater.

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“…It is obvious that all e-skin samples show an absorption peak at about 1073 cm −1 , which is assigned to the C–O–C stretching vibrations of graphene [ 69 ]. The patterns show a small peak at 1264 cm −1 assigned to the C–C bonds [ 70 ]. The C-H stretching vibration peak of the methyl group associated with PDMS and graphene-based materials is observed at 2929 cm −1 [ 71 ].…”

Section: Resultsmentioning

confidence: 99%

Highly Skin-Conformal Laser-Induced Graphene-Based Human Motion Monitoring Sensor

et al. 2021

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Bio-compatible strain sensors based on elastomeric conductive polymer composites play pivotal roles in human monitoring devices. However, fabricating highly sensitive and skin-like (flexible and stretchable) strain sensors with broad working range is still an enormous challenge. Herein, we report on a novel fabrication technology for building elastomeric conductive skin-like composite by mixing polymer solutions. Our e-skin substrates were fabricated according to the weight of polydimethylsiloxane (PDMS) and photosensitive polyimide (PSPI) solutions, which could control substrate color. An e-skin and 3-D flexible strain sensor was developed with the formation of laser induced graphene (LIG) on the skin-like substrates. For a one-step process, Laser direct writing (LDW) was employed to construct superior durable LIG/PDMS/PSPI composites with a closed-pore porous structure. Graphene sheets of LIG coated on the closed-porous structure constitute a deformable conductive path. The LIG integrated with the closed-porous structure intensifies the deformation of the conductive network when tensile strain is applied, which enhances the sensitivity. Our sensor can efficiently monitor not only energetic human motions but also subtle oscillation and physiological signals for intelligent sound sensing. The skin-like strain sensor showed a perfect combination of ultrawide sensing range (120% strain), large sensitivity (gauge factor of ~380), short response time (90 ms) and recovery time (140 ms), as well as superior stability. Our sensor has great potential for innovative applications in wearable health-monitoring devices, robot tactile systems, and human–machine interface systems.

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“…Hydrocarbons adsorbed spontaneously during the heating of the samples, which was investigated by FT-IR spectroscopy (Figure 3c). Absorptions at 1100−1300 cm −1 were attributed to C−C bond, 28 and CC absorptions that appeared at about 1630 cm −1 . 29 Absorptions around 950, 2910, and 3050 cm −1 were ascribed to stretching and bending vibrations of the C−H bond.…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly and Safe Method of Fabricating Superhydrophobic Surfaces on Stainless Steel Substrates

Wang

et al. 2019

J. Phys. Chem. C

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Industries are forced to explore more eco-friendly and safer processing methods to cope with increasing environmental issues. One of them is the fabrication of superhydrophobic stainless steel surfaces in the food industry. Current methods of fabricating superhydrophobic stainless steel surfaces have disadvantages, including using various toxic chemicals and fluorinated modifications, which cause hazards and environmental pollution, thereby limiting the application in the food industry. In this paper, an eco-friendly and safe method is proposed for fabricating superhydrophobic surfaces on stainless steel substrates using vacuum evaporation, chemical replacement reaction, and heating. The as-fabricated surface shows good superhydrophobicity with a water contact angle (WCA) of up to 155.7°as well as a water slide angle (WSA) as low as about 0°. Meanwhile, repellency to acidic and alkaline liquids, durability, self-cleaning, and antifouling properties are studied. Besides, the carbon content and its effect on wettability of the samples before and after heating at different temperatures are deeply investigated. The proposed method is an alternative approach for fabricating superhydrophobic stainless steel surfaces for application in the food industry without any environmental pollution.

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Correlation between Physico-Mechanical and Rheological Properties of Rubber Compounds Based on NR-BR with C-C Gel Content in Polybutadiene

Cited by 7 publications

References 38 publications

Micro-Nano Hierarchical Dendritic Structures for Droplet Curve Manipulation: Implications for Microfluidic Devices

Micro-Nano Hierarchical Dendritic Structures for Droplet Curve Manipulation: Implications for Microfluidic Devices

Highly Skin-Conformal Laser-Induced Graphene-Based Human Motion Monitoring Sensor

Eco-Friendly and Safe Method of Fabricating Superhydrophobic Surfaces on Stainless Steel Substrates

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