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Hierarchical polymerized high internal phase emulsions synthesized from surfactant-stabilized emulsion templates


, : Hierarchical polymerized high internal phase emulsions synthesized from surfactant-stabilized emulsion templates. Langmuir 29(20): 5952-5961

In building construction, structural elements, such as lattice girders, are positioned specifically to support the mainframe of a building. This arrangement provides additional structural hierarchy, facilitating the transfer of load to its foundation while keeping the building weight down. We applied the same concept when synthesizing hierarchical open-celled macroporous polymers from high internal phase emulsion (HIPE) templates stabilized by varying concentrations of a polymeric non-ionic surfactant from 0.75 to 20 w/vol %. These hierarchical poly(merized)HIPEs have multimodally distributed pores, which are efficiently arranged to enhance the load transfer mechanism in the polymer foam. As a result, hierarchical polyHIPEs produced from HIPEs stabilized by 5 vol % surfactant showed a 93% improvement in Young's moduli compared to conventional polyHIPEs produced from HIPEs stabilized by 20 vol % of surfactant with the same porosity of 84%. The finite element method (FEM) was used to determine the effect of pore hierarchy on the mechanical performance of porous polymers under small periodic compressions. Results from the FEM showed a clear improvement in Young's moduli for simulated hierarchical porous geometries. This methodology could be further adapted as a predictive tool to determine the influence of hierarchy on the mechanical properties of a range of porous materials.

US$19.90

PMID: 23617331

DOI: 10.1021/la3047643


Other references

Brian, D.A.; Shockley, L.J., 1993: Coronaviruses in tamarin and marmoset colitis. Unknown

Campbell, T.A., 1986: Effect of population density on agronomic performance and chemical yields in smooth sumac, Rhus glabra L. Effects of densities of 12 000, 18 000 or 36 000/ha on DM and polyphenols+oil yield were studied at Beltsville, Maryland, USA, over 3 yr. Annual yields were highest at 36 000/ha: 5.41 t/ha DM and 0.56 t/ha polyphenols+oil the second year of growth...

Blech, W., 1967: Alteration of the paper-chromatography determined arginase activity in liver, serum and peritoneal washing fluid in in vivo autolysis of a liver lobe of the rat. Zeitschrift für die Gesamte Experimentelle Medizin Einschliesslich Experimentelle Chirurgie 144(2): 134-144

Lohrl, H., 1935: Beitrag zur Saugetierfauna des Federseegebiets. Veroff Natursch Stuttgart, 11: 103-104

Kanamaru, T.; Takagi, T.; Takakura, Y.; Hashida, M., 1998: Biological effects and cellular uptake of c-myc antisense oligonucleotides and their cationic liposome complexes. The biological effects and cellular uptake of human c-myc antisense oligonucleotides and their liposome complexes were investigated in vitro using human promonocytic leukemia U937 cells. Antisense phosphorothioate oligonucleotides (S-Oligo) signif...

Sizaret P.; Degiovanni A., 1971: Incidents or accidents caused by psychotropic agents. Revue de Medecine de Tours 6(1): 37-42

Labrecque, D.R.; Philips, M.J.P.rino; Ippolito, L.; Mitros, F.A.; Goeken, J.A., 2000: Antineutrophil cytoplasmic antibody and autoimmune hepatitis. Clinical & Experimental Immunology 120(Suppl 1): 57, May

Perez G.O.; Valdivieso A.J., 1981: Comparison of renal responses to isotonic saline infusions into portal and jugular vein in sodium loaded conscious rats. Kidney International 19(1): 252

Abe, M., 1975: Principle of radioimmunoassay--recent progress on parathyroid hormone. Rinsho Byori. Japanese Journal of Clinical Pathology 23(12): 980-987

Docke F., 1969: Nerval effect of the hypothalamus on the function of the adrenal cortex. Journal Of Neuro Visceral Relations: 128-135