Effect of nanosized and surface-modified precipitated calcium carbonate on properties of CaCO3/polypropylene nanocomposites

Лам, Тран Дай; Hoang, Tran Vinh; Quang, Duong Tuan; Kim, Jong Seung

doi:10.1016/j.msea.2008.09.060

Cited by 99 publications

(45 citation statements)

References 13 publications

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“…Due to weight reduction and high surface area, the hollow rice-like nano calcite particles could be used in composite materials, plastics, cement, paint, paper manufacturing, etc. [41][42][43][44][45][46]. Most importantly, as we were searching for a candidate for the inorganic material for drug loading, drugs can be trapped within these hollow nano-CaCO 3 particles to effectively and efficiently deliver them to the tumors and cancer cells with some modifications [19,[47][48][49][50][51].…”

Section: Resultsmentioning

confidence: 99%

Rice-like hollow nano-CaCO 3 synthesis

Ulkeryildiz¹,

Kilic²,

Ozdemir³

2016

Journal of Crystal Growth

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a b s t r a c tWe have shown that Ca(OH) 2 solution is a natural stabilizer for CaCO 3 particles. We designed a CO 2 bubbling crystallization reactor to produce nano-CaCO 3 particles in homogenous size distribution without aggregation. In the experimental set-up, the crystallization region was separated from the stabilization region. The produced nanoparticles were removed from the crystallization region into the stabilization region before aggregation or crystal growth. It was shown that rice-like hollow nano-CaCO 3 particles in about 250 nm in size were produced with almost monodispersed size distribution. The particles started to dissolve through their edges as CO 2 bubbles were injected, which opened-up the pores inside the particles. At the late stages of crystallization, the open pores were closed as a result of dissolution-recrystallization of the newly synthesized CaCO 3 particles. These particles were stable in Ca(OH) 2 solution and no aggregation was detected. The present methodology can be used in drug encapsulation into inorganic CaCO 3 particles for cancer treatment with some modifications.

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Section: Resultsmentioning

confidence: 99%

Rice-like hollow nano-CaCO 3 synthesis

Ulkeryildiz¹,

Kilic²,

Ozdemir³

2016

Journal of Crystal Growth

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“…The CaCO 3 particles were dispersed into the mixture of TEOS, 200 ml ethanol, and 300 ml distillation water. The mole ratios of TEOS to CaCO 3 were vary as ‫,03׃1‬ 1:20 and 1:10, then 100 ml NH 4 OH was added slowly, and the mixture was vigorously stirred at 40 o C for 6 h. After the reaction, the CaCO 3 @SiO 2 particles were filtrated and washed with ethanol followed by distillation water for several times to remove dissociative polysiloxane, unreacted monomer, and polysiloxane oligomers. The CaCO 3 @SiO 2 particles were then dried at 60°C in oven.…”

Section: B Preparation Of Silica Coated Calcium Carbonate Composite mentioning

confidence: 99%

“…The hydrolysis of TEOS would be occurred in the presence of water and alkaline catalysts, and Si(OH) 4 was formed as one of the of hydrolysates (scheme 1). The adding of NH 4 OH was to promote the hydrolysis of TEOS.…”

Section: A Characterization Of Modified Caco 3 Nanoparticlementioning

confidence: 99%

“…The adding of NH 4 OH was to promote the hydrolysis of TEOS. Then, Si(OH) 4 molecule would polymerize with other Si(OH) 4 or TEOS molecule (scheme 2 or scheme 3). The product of this step was the monomer or oligomers of polysiloxane.…”

Section: A Characterization Of Modified Caco 3 Nanoparticlementioning

confidence: 99%

“…Fine particles CaCO 3 can provide nucleation centers and decrease the kinetic barrier to nucleation of hydrophilic silica. Furthermore, the monomers or oligomers of polysiloxane along with Si(OH) 4 molecules have very high activities, so they can be adsorbed to the surface of CaCO 3 rapidly. The polymerization of silica (scheme 4) occurs on the surface of the CaCO 3 particles and the silica film thus covers around the CaCO 3 particles tightly.…”

Section: A Characterization Of Modified Caco 3 Nanoparticlementioning

confidence: 99%

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Mechanical Properties of Hydrophilicity Modified CaCO3-Poly (Lactic Acid) Nanocomposite

Nekhamanurak¹,

Patanathabutr²,

Hongsriphan³

2012

IJAPM

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Abstract-The goal of this work is to modify surface of calcium carbonate nanoparticles with silica (CaCO 3 @SiO 2 ) via sol-gel process, and to investigate the influence of CaCO 3 @SiO 2 on mechanical properties and fracture behavior of poly(lactic acid) nanocomposite. Modified CaCO 3 @SiO 2 nanoparticles were prepared with different Si:Ca ratios. It is found that the Si/Ca wt% was increased with respect to the Si:Ca mole ratio used in the reaction. Incorporating CaCO 3 @SiO 2 of 5 wt% increased elastic modulus, %elongation at break and notched impact strength of PLA nanocomposites. These properties of hydrophilic-modified CaCO 3 -poly(lactic acid) nanocomposite was increased with respect to the increasing of SiO 2 content on the surface of CaCO 3 nanoparticles. This implies that better compatibility between PLA matrix and nano-fillers was achieved after modification surface of CaCO 3 with SiO 2 layers.Index Terms-Nanocomposite, poly(lactic acid), calcium carbonate nanoparticle, silica, sol-gel process.

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Preparation and characterization of nano/micro‐calcium carbonate particles/polypropylene composites

Zhang

Han

Zhou

et al. 2010

J of Applied Polymer Sci

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A new kind of polypropylene (PP)/CaCO 3 composites was prepared on a twin screw extruder with the nanoparticle content of 5 wt % and the 2500 mesh microparticle content of 15 wt %. The mechanical property of four different samples [pure PP (1), PP filled with 15 wt % microCaCO 3 particle composites (2), PP filled with 5 wt % nanoCaCO 3 particle composites (3) and PP filled with micro/nano-CaCO 3 complex size particle composites (4)] was investigated through tensile tests, notched Izod impact tests and SEM. The results indicated that the sample 4 had the best mechanical property. The proofs of SEM showed that the high impact energy could lead to debonding and creating microcavitation between the nanoparticle and polymer interface if the polymer was filled with the nanoparticles. This process could absorb a lot of mechanical failure energy, but too much mechanical failure energy would lead to the enlargement of microcavitation and the destruction of the composites in sample 3. In sample 4, the microparticle could be used to prevent the enlargement of microcavitation in the matrix polymer under the higher impact failure energy. In this article, the model of the impacting failure process of micro/nanoCaCO 3 /PP composites was established.

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Effect of nanosized and surface-modified precipitated calcium carbonate on properties of CaCO3/polypropylene nanocomposites

Cited by 99 publications

References 13 publications

Rice-like hollow nano-CaCO 3 synthesis

Rice-like hollow nano-CaCO 3 synthesis

Mechanical Properties of Hydrophilicity Modified CaCO3-Poly (Lactic Acid) Nanocomposite

Preparation and characterization of nano/micro‐calcium carbonate particles/polypropylene composites

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