STM surface modification of the Si–SiO2–polymer system

Kornilov, V. M.; Лачинов, А. Н.

doi:10.1016/s0167-9317(03)00327-7

Cited by 11 publications

(6 citation statements)

References 8 publications

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“…The nanocomposite displays a morphology consisting of exfoliated dickite platelets of different size and approximately spherical nano‐Cu particles, as well as some intercalated thin tactoids and nonexfoliated dickite aggregates. For preparing clay/polyolefin nanocomposites, a combination of appropriate organic modification and sufficiently high shear forces in the melt during polymer processing is usually required to generate extensive ratios exfoliation in nanocomposites, however, fully exfoliated systems are very seldom achieved via conventional melt blending routes in polyolefin . This nanocomposite appears to show, however, more exfoliated platelets in the polyolefin matrix and these exfoliated platelets are well dispersed in the matrix.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Cu/Dickite/LLDPE nanocomposites and synergistic effect of exfoliated dickite and nano-Cu in LLDPE matrix

Xue

Jiang

2013

Polym. Compos.

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A novel anticorrosion packaging nanocomposite composed of LLDPE (linear low‐density polyethylene), nano‐sized Cu, and exfoliated dickite was prepared via melt mixing combined with melt extruding process. X‐ray diffraction and transmission electron microscopy (TEM) were employed to characterize the resultant nanocomposite. The results showed that most dickite layers were exfoliated and the nano‐Cu particles were distributed uniformly in the polymer matrix. The characteristic properties of the Cu/dickite/LLDPE nanocomposite were investigated using salt spray test, thermogravimetry analysis, mechanical test, and antibacterial test. The salt spray test results showed that exfoliated dickite and nano‐Cu improved the anticorrosion properties of the Cu/dickite/LLDPE nanocomposite in simulated ocean environment, respectively. Furthermore, the coexistence of exfoliated dickite and nano‐Cu in Cu/dickite/LLDPE nanocomposite produced a synergistic effect on enhancing the anticorrosion properties. Additionally, the co‐incorporation of exfoliated dickite and nano‐Cu in LLDPE matrix also improved the thermal‐oxidative stability and mechanical properties of the polymer matrix. The bactericidal properties evaluation showed that the Cu/dickite/LLDPE nanocomposite had better bactericidal ability because of the presence of nano‐Cu in LLDPE matrix. POLYM. COMPOS., 34:1061–1070, 2013. © 2013 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Preparation of Cu/Dickite/LLDPE nanocomposites and synergistic effect of exfoliated dickite and nano-Cu in LLDPE matrix

Xue

Jiang

2013

Polym. Compos.

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“…3(f)] and a small amount of nonexfoliated dickite aggregates. A combination of appropriate surface modification [26][27][28][29] and sufficiently high shear forces in the melt during polymer processing is usually required to generate extensive ratios exfoliation in nanocomposites; however, fully exfoliated systems are very seldom achieved via conventional melt-blending routes in polyolefins. 30 This nanocomposite appeared to show, however, more highly dispersed exfoliated platelets in the polyolefin matrix.…”

Section: Ftir Spectral Analysismentioning

confidence: 99%

Preparation and characterization of linear low‐density polyethylene/dickite nanocomposites prepared by the direct melt blending of linear low‐density polyethylene with exfoliated dickite

Xue

Zhang

Jiang

et al. 2010

J of Applied Polymer Sci

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Dickite particles were exfoliated by the thermal decomposition of molecular urea in the interlayer of dickite. The exfoliated dickite (ED) was composed with linear low-density polyethylene (LLDPE) to prepare a novel LLDPE/dickite nanocomposite (LDN-5). X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were used to evaluate the exfoliation effect. FTIR spectra showed that the innersurface hydroxyls of dickite decreased because of the sufficient exfoliation of the dickite layers. The 001 diffraction of dickite in the XRD pattern almost disappeared after exfoliation; this indicated the random orientation of dickite platelets. SEM and TEM micrographs confirmed the effective thermal decomposition of the interlamellar molecular urea ED layers, which resulted in smaller particle sizes and better dispersions of dickite in the resulting LLDPE/dickite composite. The microstructure of LDN-5 showed that most of the dickite platelets were exfoliated and homogeneously dispersed in the LLDPE; this led to increases in the anticorrosion properties and thermal stabilities of LDN-5. The results of salt-spray tests illustrated that the corrosion rate of the iron coupon decreased from 23% (LLDPE packing) to 0.4% (LDN-5 packing). Moreover, the thermal degradation temperature corresponding to a mass loss of 10% increased from 330 C (pure LLDPE) to 379 C (LDN-5).

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“…In this article, surface modification33–39 is used to treat the dickite raw materials. Mechanochemical grinding, which could form new surfaces, create lattice defects, and increase the reactivity of the mineral, may play an important role on hydrophobic modification.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

Xue¹,

Jiang²,

Li³

et al. 2010

J of Applied Polymer Sci

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Dickite particles were modified by silane coupling agent, hexadecyl phosphate, oleic acid, and stearic acid (SA), respectively. Modified dickite was composed with linear low-density polyethylene (LLDPE) to prepare a series of LLDPE/modified dickite composites. Hydrophilicity of modified dickite was characterized by dispersion experiments and contact angle tests. The results indicated that hydrophilicity of modified dickite decreases sharply, compared with nonmodified dickite. Among four modifying agents, SA had obvious effect on hydrophobic modification of dickite. Fourier-transform infrared spectra results suggested that chemical bonding between modifying agent and dickite was beneficial to the hydrophobic modification. Results of salt spray tests illustrated that the introduction of modified dickite into LLDPE improved the anticorrosion properties of the polymer universally. The anticorrosion mechanism of LLDPE/modified dickite was analyzed by scanning electron microscope micrograph. The mechanical properties of the resultant composites displayed a fact of reinforcement of modified dickite.

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STM surface modification of the Si–SiO2–polymer system

Cited by 11 publications

References 8 publications

Preparation of Cu/Dickite/LLDPE nanocomposites and synergistic effect of exfoliated dickite and nano-Cu in LLDPE matrix

Preparation of Cu/Dickite/LLDPE nanocomposites and synergistic effect of exfoliated dickite and nano-Cu in LLDPE matrix

Preparation and characterization of linear low‐density polyethylene/dickite nanocomposites prepared by the direct melt blending of linear low‐density polyethylene with exfoliated dickite

Hydrophobic modification of dickite and salt spray test study on LLDPE/modified dickite composite

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