Preparation and characterization of some unusually transparent poly(dimethylsiloxane) nanocomposites

Rajan, Guru S.; Sur, Gil Soo; Mark, J. E.; Schaefer, Dale W.; Beaucage, Gregory

doi:10.1002/polb.10565

Cited by 83 publications

(63 citation statements)

References 5 publications

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“…PDMS is optically clear, and, in general, is considered to be inert, non-toxic and non-flammable [17,18]. Previous studies have mainly focused on the structural properties of PDMS [19] and the kinetic properties under crystallization from solution [20]. In our previous work, we did pioneering work in using PDMS a matrix for fabricating and characterising patterned MREs with precise BCT and BCC microstructures [21].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of PDMS based magnetorheological elastomers

Nakano

2013

Smart Mater. Struct.

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This paper presents the fabrication and characterization of a new magnetorheological elastomer (MRE) by using polydimethylsiloxane (PDMS) as a matrix. The base and curing agent of PDMS with a weight ratio of 10:1 were mixed first as the carrying matrix, and then carbonyl iron particles were added to the matrix and stirred sufficiently. The final mixture was placed in a vacuum chamber to eliminate bubbles for 30 min and was moulded later to form membranes of 1 mm thickness. A total of four PDMS based MRE samples, with different weight fractions of 60%, 70%, 80%, and 90%, were fabricated. Their mechanical properties under both steady-state and dynamic loading conditions were tested. The effects of particle composition, magnetic field, strain amplitude and frequency on the MRE effects were summarized. With the increase of iron particle composition, the magnetorheological effects of the samples increase steadily. It is also noted that the initial modulus of the MRE samples shows an increasing trend with the iron particle composition. Additionally, the microstructures of the PDMS based MREs were also observed by a low vacuum scanning electric microscope (LV-SEM). Sendai, Japan AbstractThis paper presents the fabrication and characterisation of a new magnetorheological elastomer (MRE) by using Polydimethylsiloxane (PDMS) as a matrix. The base and curing agent of PDMS with a weight ratio of 10:1 were mixed first as the carrying matrix, then carbonyl iron particles were added to the matrix and stirred sufficiently. The final mixture was placed in a vacuum chamber to eliminate bubbles in 30 minutes and was molded later to be membranes at 1mm thickness. A total of four PDMS based MRE samples, with different weight fractions of 60%, 70%, 80%, and 90%, were fabricated. Their mechanical properties under both steady-state and dynamic loading conditions were tested. The effects of particle composition, magnetic field, strain amplitude and frequency on the MRE effects were summarized. With the increase of iron particle composition, the PDMS based MRE samples increase steadily. It is also noted that the initial modulus of the MRE samples shows an increasing trend with the iron particle composition. Additionally, the microstructures of the PDMS based MREs were also observed by a low vacuum scanning electric microscope (LV SEM).

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of PDMS based magnetorheological elastomers

Nakano

2013

Smart Mater. Struct.

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“…This system is extremely robust and is capable of withstanding the stresses and shock associated with rough handling that would severely damage more brittle waveguide systems. PDMS also has very high light transmittance ( 95%) over a large frequency range [8], does not require special handling procedures, and is relatively low Manuscript received April 14, 2004; revised February 15, 2005. This work was supported in part by the University of Utah College of Engineering, Salt Lake City.…”

Section: Introductionmentioning

confidence: 99%

A monolithic PDMS waveguide system fabricated using soft-lithography techniques

Chang-Yen

Eich

Gale

2005

J. Lightwave Technol.

206

102

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Abstract-A monolithic waveguide system using poly(dimethyl siloxane) (PDMS) was designed, fabricated, and characterized. The waveguide demonstrated good confinement of light and relatively low attenuation at 0.40 dB/cm. The robustness and handling properties of the completed waveguides were excellent, and the process yield exceeded 96%. The waveguide did exhibit moderate temperature and humidity sensitivity but no temporal variation, and insertion loss remained stable over extended periods of time. Applications of this waveguide system in microscale sensing are immense, judging by the frequency of use of PDMS as the substrate for microfluidic and biomedical systems. The monolithic nature of the waveguides also reduces their cost and allows integration of optical pathways into existing PDMS-based microsystems.Index Terms-Micro-total-analysis systems, poly(dimethyl siloxane), soft lithography, waveguide.

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“…The formation of the inorganic component is carried out under mild synthetic conditions and involves various alkoxides ([M(OR) x ], where M = Si, Ti, Zr, Al… and R is an aliphatic group) that are hydrolyzed and condensed under either acidic or basic catalysis, in order to form M-O-M bridging units. A series of previous investigations [1][2][3][4][5][6][7] has shown the feasibility of precipitating silica, titania or mixed silica-titania phases into PDMS networks. All these studies report significant property improvements in the hybrid composites with regard to the unfilled networks.…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of poly(dimethylsiloxane) by sol-gel in situ generated silica and titania particles

Bokobza¹,

Diop²

2010

Express Polym. Lett.

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Abstract. The usual sol-gel process was applied to precipitate silica or titania particles in a preformed poly(dimethylsiloxane) (PDMS) network under the presence of dibutyltin diacetate used as a catalyst. The resulting structures of the reinforcing fillers were studied by transmission electron microscopy and small-angle neutron scattering. Stress-strain measurements in elongation and equilibrium swelling experiments revealed distinct behaviors mainly attributed to the nature and the size of the generated particles and to the formation, in the case of titania, of a filler network even at low filler loadings.

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Preparation and characterization of some unusually transparent poly(dimethylsiloxane) nanocomposites

Cited by 83 publications

References 5 publications

Fabrication and characterization of PDMS based magnetorheological elastomers

Fabrication and characterization of PDMS based magnetorheological elastomers

A monolithic PDMS waveguide system fabricated using soft-lithography techniques

Reinforcement of poly(dimethylsiloxane) by sol-gel in situ generated silica and titania particles

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