Influence of titania on the morphological and mechanical properties of 1,3-butanediol dimethacrylate based polyHIPE composites

2020

Organo‐modified nanoclay incorporated high internal phase emulsions (HIPEs) were successfully used for the preparation of macroporous nanocomposite foams. Due to the aim of obtaining mechanically improved foams, HIPEs were prepared by using a monomer mixture composed of β‐myrcene and ethylene glycol dimethacrylate. Accordingly, two groups of macroporous nanocomposite foams were synthesized depending on the nanoclay type. The morphological analysis demonstrated that the pore openness of the resulting nanocomposites were significantly improved due to the decrease in the average cavity size and increase in the interconnected pore size. In terms of mechanical properties, it was found that filling 1 wt% of nanoclay which is surface modified by hydrogenated tallow lead to a 33% of increment in the compression modulus, as compared to the neat foam. However, loading 5 wt% of nanoclay having octadecylamine and aminopropyltriethoxysilane surface groups caused only 11% of increment in the compression modulus, as compared to the neat foam.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of β‐myrcene‐based macroporous nanocomposite foams: Altering the morphological and mechanical properties by using organo‐modified nanoclay

Kekevi

2020

“…HIPEs are thermodynamically meta‐stable emulsions. In order to prevent emulsion destabilization processes such as Ostwald ripening, coalescence, flocculation, and creaming, conventional surfactants or solid particles can be used to stabilize interface between the dispersed and continuous phases . Conventional surfactants are amphiphilic molecules having both hydrophilic and lipophilic groups and stabilize emulsions by minimizing the interfacial energy via positioning at oil/water interface.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, polyHIPEs obtained by ring opening metathesis polymerization (ROMP) of dicyclopentadiene (DCPD) HIPEs exhibits favorable mechanical and thermal properties. In the earlier studies synthesis, morphology tuning and influence of co‐monomer addition on the mechanical and thermal properties of DCPD polyHIPEs were investigated by several groups including us. In this context, mechanical properties of DCPD polyHIPEs were studied by conducting tensile stress/strain tests with unoxidized samples .…”

Section: Introductionmentioning

confidence: 99%

Influence of nanoparticles and antioxidants on mechanical properties of titania/polydicyclopentadiene polyHIPEs: A statistical approach

Yüce

Krajnc

et al. 2018

Self Cite

Open porous Pickering poly(high internal phase emulsion) composites were prepared by ring opening metathesis polymerization of surface modified TiO 2 nanoparticle stabilized dicyclopentadiene (DCPD) high internal phase emulsions. Oxidation of the double bonds in the polyDCPD chains of the resulting materials was prevented using antioxidants. Oxidation dependent variation of mechanical properties was demonstrated by applying compression tests to the resulting composite materials periodically. Periodical measurements revealed significantly reduced brittleness in the case of antioxidant containing polyHIPE composites. Furthermore, it was determined that the initial compression moduli and the compressive strengths of the resulting materials were significantly improved by using antioxidants as compared to antioxidant free samples. Moreover, increasing nanoparticle amount was found to have a beneficial effect with the presence of antioxidants. The relationship between the compression modulus with nanoparticle loading and different types of antioxidants was revealed by developing model regression equations and graphs.

Emulsion templated polymer monoliths containing cellulose nanocrystals: Synthesis and adsorption properties

Eslek

Kekevi

et al. 2021

Cellulose nanocrystals (CNCs) loaded hierarchical macroporous polymer monoliths were synthesized through high internal phase emulsion (HIPE) templating. For this purpose, unmodified CNCs were used as nanofiller in various amounts during HIPE preparation. The effect of CNCs loading on the hierarchical pore structure and mechanical properties was investigated. It was demonstrated that mechanical strength was significantly improved by CNCs loading. In order to reveal an application field, adsorptive property of resulting monoliths was investigated against Nile blue dye. The results showed that the maximum adsorption capacity of cationic Nile blue was 54% for the neat monolith, while it was 70% for the monolith prepared by 9 wt% CNCs loading.Meanwhile, the kinetic evaluation of the experimental adsorption data revealed that the adsorption follows pseudo-second-order kinetic model and it is consistent with Freundlich isotherm.