Surface modification of nano-TiO2 with trimellitylimido-amino acid-based diacids for preventing aggregation of nanoparticles

Mallakpour, Shadpour; Nikkhoo, Elham

doi:10.1016/j.apt.2013.05.017

Cited by 61 publications

(22 citation statements)

References 40 publications

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“…All of these studies show that the dispersity of TiO 2 improves in corresponding medium. This work also indicates that the application effects of modifiers with carboxylic in structure are more ideal among above modifiers [24][25][26]. Except for surface modifier, it is also 2 Advances in Materials Science and Engineering important to make preassessment for TiO 2 modification effects.…”

Section: Introductionmentioning

confidence: 68%

Surface Organic Modification of TiO₂ Powder and Relevant Characterization

Zhou

Sun

Ding

2017

Advances in Materials Science and Engineering

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Surface organic modification was conducted to TiO 2 with modifiers to improve the dispersity and comparability of pigment TiO 2 in application system by adjusting particle surface characteristics. Then, modification effects were characterized according to the changes in wetting contact angle and activation index of TiO 2 before and after modification. Moreover, the modification mechanisms of sodium stearate and sodium oleate were studied by analyzing the characteristics of TiO 2 surface functional groups in modification system and effects of modifiers. The results showed that, after being wet-processed with sodium stearate and sodium oleate, TiO 2 could turn from surface hydrophilic to inductive hydrophobic with controllable degree. The wetting contact angle of modified TiO 2 increased from 7 ∘ to 125.6 ∘ and 121.3 ∘ , respectively. The dispersity of TiO 2 in organic medium was stronger than that in inorganic medium. The modifiers formed absorption with chemical property on TiO 2 particle surface, so the inductive hydrophobicity of surface was stable.

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Section: Introductionmentioning

confidence: 68%

Surface Organic Modification of TiO₂ Powder and Relevant Characterization

Zhou

Sun

Ding

2017

Advances in Materials Science and Engineering

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“…Ultrasonic irradiation would be a promising method for the preparation of nano‐sized samples compared with the conventional stirring method, especially for magnetic particles . This efficient, time‐saving, and economically functional protocol was applied extensively in the synthesis and homogenous dispersion of NPs in organic polymers because of high‐energy conditions, created during ultrasonic irradiation.…”

Section: Resultsmentioning

confidence: 99%

Effective strategy for the production of novel magnetite poly(vinyl chloride) nanocomposite films with iron oxide nanoparticles double‐capped through citric acid and vitamin C

Mallakpour

Javadpour

2015

Vinyl Additive Technology

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This study focuses on the synthesis of iron oxide (Fe 3 O 4 ) nanoparticles (NPs), modification of NPs with organic molecules of citric acid (CA) and ascorbic acid (AS), and the incorporation of modified magnetic NPs into poly(vinyl chloride) (PVC) matrix. Biodegradable CA and AS coupling agents can improve the organic functional groups on the surface of Fe 3 O 4 NPs. Magnetic PVC/Fe 3 O 4 , CA, and AS nanocomposite (NC) films containing 4, 8, and 12 wt% of NPs were successfully manufactured by a fast, green, and safe strategy under ultrasonic irradiation to improve interfacial interactions and dispersion of modified NPs in the polymeric matrix. The surface functionality group's effect on the properties and also on morphology of modified NPs and NCs were analyzed by Fourier-transform infrared spectroscopy, thermogravimetric analysis, ultraviolet-visible absorption spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. Thermogravimetric analysis indicated that the thermal stability of the NCs was not destroyed in comparison with the PVC polymer. It was found that modified Fe 3 O 4 NPs have elevated the flameretardancy of the PVC hybrids. In addition, the surface morphology images showed that NPs were dispersed homogenously into the polymer matrix at nanoscale. J. VINYL ADDIT. TECHNOL., 23:E4-E14, 2017.

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“…The main aim in PVC NCs design is to improve tensile strength, electric properties, and heat resistance of the PVC. Different types of inorganic NPs have been used as filler in the preparation of NCs such as SiO 2 , TiO 2 , Fe 3 O 4 , Al 2 O 3 , ZrO 2 and ZnO [9]. For example, Mallakpour et al prepared PVC NCs filled with modified ZnO NPs and found that incorporation of the NPs into the PVC matrix can improve the thermal stability of resulting NCs [10].…”

Section: Introductionmentioning

confidence: 97%

Application of SiO2 nanoparticles with double layer coverage consist of citric acid and l(+)-ascorbic acid for the production of poly(vinyl chloride)/SiO2 nanocomposite films with enhanced optical and thermal properties

Mallakpour

Naghdi

2015

Polym. Bull.

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Incorporation of SiO 2 nanoparticles (NPs) into poly(vinyl chloride) (PVC) matrix to prepare PVC/SiO 2 nanocomposites (NCs) can enhance its properties. To achieve improved properties for the NCs, NPs should be dispersed properly and be compatible within the polymer matrix. Therefore, to prevent SiO 2 NPs from aggregation, surface modification of NPs was performed by citric acid (CA) and L(?)-ascorbic acid (AA) as biological and environmental friendly coating layers for the first time. This process was carried out under ultrasonic irradiation condition, which is an economical and eco-friendly tool. After that three different amounts of modified SiO 2 (SiO 2 -CA-AA) were inserted into PVC matrix and PVC/ SiO 2 -CA-AA NCs were prepared using solution casting method. The structures and morphology of the prepared NC films were verified by several techniques including Fourier transfer infrared, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, ultraviolet-visible (UV-Vis) spectroscopy and tensile testing. Thermogravimetric analysis confirmed the presence of about 13 wt% modifiers on the surface of SiO 2 . Microscopic observations showed good dispersity of SiO 2 -CA-AA NPs in the polymer matrix. Resulting NC films showed more flexibility than pure PVC.

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Surface modification of nano-TiO2 with trimellitylimido-amino acid-based diacids for preventing aggregation of nanoparticles

Cited by 61 publications

References 40 publications

Surface Organic Modification of TiO₂ Powder and Relevant Characterization

Surface Organic Modification of TiO₂ Powder and Relevant Characterization

Effective strategy for the production of novel magnetite poly(vinyl chloride) nanocomposite films with iron oxide nanoparticles double‐capped through citric acid and vitamin C

Application of SiO2 nanoparticles with double layer coverage consist of citric acid and l(+)-ascorbic acid for the production of poly(vinyl chloride)/SiO2 nanocomposite films with enhanced optical and thermal properties

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Surface modification of nano-TiO2 with trimellitylimido-amino acid-based diacids for preventing aggregation of nanoparticles

Cited by 61 publications

References 40 publications

Surface Organic Modification of TiO2 Powder and Relevant Characterization

Surface Organic Modification of TiO2 Powder and Relevant Characterization

Effective strategy for the production of novel magnetite poly(vinyl chloride) nanocomposite films with iron oxide nanoparticles double‐capped through citric acid and vitamin C

Application of SiO2 nanoparticles with double layer coverage consist of citric acid and l(+)-ascorbic acid for the production of poly(vinyl chloride)/SiO2 nanocomposite films with enhanced optical and thermal properties

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Surface Organic Modification of TiO₂ Powder and Relevant Characterization

Surface Organic Modification of TiO₂ Powder and Relevant Characterization