Engineering macroporous composite materials using competitive adsorption in particle-stabilized foams

Wong, J.; Tervoort, Elena; Busato, Stephan; Ermanni, Paolo; Gauckler, Ludwig J.

doi:10.1016/j.jcis.2012.05.049

Cited by 6 publications

(5 citation statements)

References 53 publications

(109 reference statements)

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“…Additives caused the volume recovery to decrease due to decreased compressibility of the materials. All foams recovered their initial diameters, which compares well with previous examinations of SMP composite materials demonstrating no reduction in recoverable strain with low concentrations of additives . The W series showed the most drastic decrease in volume recovery, with 4% W loading having comparable recovery with 10% ZrO 2 loading.…”

Section: Resultssupporting

confidence: 84%

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Examination of radio‐opacity enhancing additives in shape memory polyurethane foams

Weems

Raymond

Wacker

et al. 2015

J of Applied Polymer Sci

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Three microparticle additives, tungsten (W), zirconium oxide (ZrO2), and barium sulfate (BaSO4) were selected to enhance the radio-opacity in shape memory polymer (SMP) foam biomaterials. The addition of filler causes no significant alterations of glass transition temperatures, density of the materials increases, pore diameter decreases, and total volume recovery decreases from approximately 70 times in unfilled foams to 20 times (4% W and 10% ZrO2). The addition of W increases time to recovery; ZrO2 causes little variation in time to shape recovery; BaSO4 increases the time to recovery. On a 2.00 mean X-ray density (mean X.D.) scale, a GDC coil standard has a mean X.D. of 0.62; 4% W enhances the mean X.D. to 1.89, 10% ZrO2 to 1.39 and 4% BaSO4 to 0.74. Radio-opacity enhancing additives could be used to produce SMP foams with controlled shape memory kinetics, low density, and enhanced X-ray opacity for medical materials.

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Section: Resultssupporting

confidence: 84%

“…With greater concentrations of additives [Figure (B–D)], the difference in the pore diameters decreased, shown by the decreasing standard deviation error bars. Previous studies have shown that particle inclusion can alter pore size and disrupt pore morphology, depending on particle species and loading concentrations …”

Section: Resultsmentioning

confidence: 99%

Examination of radio‐opacity enhancing additives in shape memory polyurethane foams

Weems

Raymond

Wacker

et al. 2015

J of Applied Polymer Sci

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“…As shown in Table , for the greatest void average diameter of 24 μm, an interconnecting pore average diameter of 7 μm and homogeneity of poly(H3) was obtained at an internal phase volume fraction of 85 % with 0.1 g surfactant. The existence of macroporous and intercommunicating apertures endows these materials with the features of high permeability and stability, which have a remarkable effect on the adsorption and catalytic properties . For example, Cui et al.…”

Section: Resultsmentioning

confidence: 99%

“…Thee xistence of macroporous and intercommunicating apertures endows these materials with the features of high permeability and stability,w hich have ar emarkable effect on the adsorption and catalytic properties. [38][39][40] Fore xample,C ui et al have reported high adsorption capacity and high adsorption rate towardC r III ,w hich was attributedt ot he large pore size enhancing mass transfer duringa dsorption and improving the adsorption rate. [41] In the process of obtaining catalyst with Lewis acidic sites,t he pH and temperature showed prominent influences on process of adsorbingC r III .…”

Section: Synthesis Of Catalyst With Lewis Acidic Sitesmentioning

confidence: 99%

Combination of Brønsted and Lewis Polymeric Catalysts for Efficient Conversion of Cellulose into 5‐Hydroxymethylfurfural (HMF) in Ionic Liquids

et al. 2015

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Stable oil‐in‐water high internal phase emulsions (HIPEs) with an internal phase volume fraction of 85 % were stabilized using Tween 85. The prepared poly(HIPEs) were first investigated as adsorbents to treat water polluted with CrIII, and then the catalysts with Lewis acidic sites was synthesized. The catalysts with Brønsted acidic sites were obtained by ion‐exchanging. The as‐prepared HIPEs–CrIII (PEs–CrIII) and HIPEs–SO3H (PEs–SO3H) possess open‐cell structure, interconnecting pores, and strong acidity, they are utilized as highly efficient catalysts for the conversion of biomass to 5‐hydroxymethylfurfural (HMF). These results showed maximum production yields for cellulose, glucose, and fructose of 37.0 %, 58.0 %, and 80.8 %, respectively. PEs–CrIII and PEs–SO3H can be very easily recycled at least four times without significant loss of activity. Herein, a new method is presented to transform cellulose by using two catalysts in a one‐pot process for meeting the varying demands involved at different reaction stages.

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“…On the other hand, the ligand MPS contributed not only to the stability of the nanoparticles in the organic matrix but, as a silane, it is known to act as a co-photoinitiator [21,31]. According to literature, about 1.49 mg/m 2 is needed to form a closed organic shell [32,33,34,35,36]. The increased molecular loading in the results of 3.43 and 5.59 mg/m 2 for MPS-TEC13Al 2 O 3 and MPS-TEC35Al 2 O 3 respectively can be explained by physical MPS adsorption in addition to covalent binding, as was shown in the FTIR spectra.…”

Section: Discussionmentioning

confidence: 99%

Influence of Al2O3 Nanoparticle Addition on a UV Cured Polyacrylate for 3D Inkjet Printing

et al. 2019

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The brittleness of acrylic photopolymers, frequently used in 3D Inkjet printing, limits their utilization in structural applications. In this study, a process was developed for the production and characterization of an alumina-enhanced nanocomposite with improved mechanical properties for Inkjet printing. Ceramic nanoparticles with an average primary particle size (APPS) of 16 nm and 31 nm, which was assessed via high-resolution scanning electron microscopy (HRSEM), were functionalized with 3.43 and 5.59 mg/m² 3-(trimethoxysilyl)propyl methacrylate (MPS), respectively, while being ground in a ball mill. The suspensions of the modified fillers in a newly formulated acrylic mixture showed viscosities of 14 and 7 mPa∙s at the printing temperature of 60 °C. Ink-jetting tests were conducted successfully without clogging the printing nozzles. Tensile tests of casted specimens showed an improvement of the tensile strength and elongation at break in composites filled with 31 nm by 10.7% and 74.9%, respectively, relative to the unfilled polymer.

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Engineering macroporous composite materials using competitive adsorption in particle-stabilized foams

Cited by 6 publications

References 53 publications

Examination of radio‐opacity enhancing additives in shape memory polyurethane foams

Examination of radio‐opacity enhancing additives in shape memory polyurethane foams

Combination of Brønsted and Lewis Polymeric Catalysts for Efficient Conversion of Cellulose into 5‐Hydroxymethylfurfural (HMF) in Ionic Liquids

Influence of Al2O3 Nanoparticle Addition on a UV Cured Polyacrylate for 3D Inkjet Printing

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