Preparation and characterization of well-dispersed waterborne polyurethane/CaCO3 nanocomposites

Gao, Xiaoyan; Zhu, Yanchao; Shi, Zhengxing; Gao, Wei; Wang, Zichen; Zhou, Bing

doi:10.1016/j.colsurfa.2011.01.025

Cited by 66 publications

(52 citation statements)

References 25 publications

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“…This suggests that CaCO 3 acts as thermal insulator and mass transport barrier to the volatile products generated during decomposition, thus results in delay of thermal degradation. 20,21 As a result, the thermal properties of HDPE can be improved significantly by incorporation of CaCO 3 particles, especially sphere-like CaCO 3 , which can be attributed to a stronger interaction with the resin matrix than other morphologies CaCO 3 . In order to study the influence of CaCO 3 filler on the crystallisation of HDPE in the blends, DSC studies of melting behaviour were performed.…”

Section: Resultsmentioning

confidence: 99%

Role of calcium carbonate morphology on thermal and mechanical properties of HDPE

Shi

Wang

Cai

et al. 2013

Plastics, Rubber and Composites

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Calcium carbonate (CaCO 3 ) microparticles with four different morphologies, which are cubic, acicular, spindle and sphere-like, were prepared using calcium chloride (CaCl 2 ) and sodium carbonate (Na 2 CO 3 ) aqueous solutions containing various additives. High density polyethylene (HDPE)/CaCO 3 composites were prepared using a HAAKE Rotational Rheometer. The thermal behaviour, mechanical properties and the rheology property were investigated and characterised by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), capillary rheometry and universal testing machine. The result shows the addition of CaCO 3 to HDPE can increase the decomposition temperature and decrease the melting temperature and crystallization temperature. Sphere-like CaCO 3 is the best form in improving the thermal stability and toughness of the composites; while the cubic CaCO 3 can cause negative effect to the toughness.

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Section: Resultsmentioning

confidence: 99%

Role of calcium carbonate morphology on thermal and mechanical properties of HDPE

Shi

Wang

Cai

et al. 2013

Plastics, Rubber and Composites

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“…Nanoparticle dispersion in the polymer matrix and fine control of the interface morphology of polymer nanocomposites are the most important parameters to improve the properties of nanocomposites …”

Section: Introductionmentioning

confidence: 99%

Effect of polyol structure on the properties of the resultant magnetic polyurethane elastomer nanocomposites

Mohammadi

Barikani

Barmar

2013

Polymers for Advanced Techs

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In this study, two types of magnetic polyurethane (PU) elastomer nanocomposites using polycaprolactone (PCL) and polytetramethylene glycol (PTMG) as polyols were synthesized by incorporating thiodiglycolic acid surface modified Fe 3 O 4 nanoparticles (TSM-Fe 3 O 4 ) into PU matrices through in situ polymerization method. TSM-Fe 3 O 4 nanoparticles were prepared using in situ coprecipitation method in alkali media and were characterized by X-ray diffraction, Fourier Transform Infrared Spectrophotometer, Transmission Electron Microscopy, and Vibrating Sample Magnetometer. The effects of PCL and PTMG polyols on the properties of the resultant PUs were studied. The morphology and dispersion of the nanoparticles in the magnetic nanocomposites were studied by Scanning Electron Microscope. It was observed that dispersion of nanoparticles in PTMG-based magnetic nanocomposite was better than PCL-based magnetic nanocomposite. Furthermore, the effect of polyol structure on thermal and mechanical properties of nanocomposite was investigated by Thermogravimetric Analysis and Dynamic Mechanical Thermal Analysis. A decrease in the thermal stability of magnetic nanocomposites was found compared to pure PUs. Furthermore, DMTA results showed that increase in glass transition temperature of PTMG-based magnetic nanocomposite is higher than PCL-based magnetic nanocomposite, which is attributed to better dispersion of TSM-Fe 3 O 4 nanoparticles in PTMG-based PU matrix. Additionally, magnetic nanocomposites exhibited a lower level of hydrophilicity compared to pure PUs. These observations were attributed to the hydrophobic behavior of TSM-Fe 3 O 4 nanoparticles. Moreover, study of fibroblast cells interaction with magnetic nanocomposites showed that the products can be a good candidate for biomedical application.

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“…In general, 2-propanol shows an upward pattern and chloroform shows a decreasing trend with respect to the treatment time. Moreover, although 2- The reaction times in the 2-propanol solvent were 4,8,18, and 24 h, whereas they were 1, 2, 4, and 8 h in chloroform, which shows that the adsorption equilibrium is achieved within a shorter time in chloroform than in 2-propanol. A closer examination of the results obtained using 2-propanol as the solvent, as shown in Figure 4, revealed an increase in the adsorption time with increasing active ratio.…”

Section: Modification Effects Of Calcite Using Fatty Acids As Modifiermentioning

confidence: 99%

“…In the 1950s, its use as a filler mixed with polymer products increased dramatically in parallel with advances in plastic engineering [2]. More recently, it has been used primarily as a filler or an additive in many industries such as cement, rubber, plastic, building material, and paper [3][4][5]. CaCO 3 , as a filler, is used to improve the physical properties of polymer products, improve processability, increase the surface hardness, add functionality, and save costs associated with the volume increase by mixing it with the polymer matrix [6].…”

Section: Introductionmentioning

confidence: 99%

Nonpolar Surface Modification Using Fatty Acids and Its Effect on Calcite from Mineral Carbonation of Desulfurized Gypsum

et al. 2018

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CaCO 3 is often used as an additive in many industries. However, additional functions are required to expand its applicability. This entails modification of its physicochemical properties. Accordingly, in this study, a particle surface modification treatment was performed on CaCO 3 produced from desulfurized gypsum for a range of industrial applications. In the experiment, fatty acids were used to modify the CaCO 3 surface, and the scale of the modification effect was based on the degree of change associated with a polar surface taking on nonpolar surface properties. In the preliminary modification experiment, stearic acid was dissolved in 2-propanol or chloroform, and the extent of the reaction and the active ratio were measured according to the stearic acid concentration. The results showed that the effective active ratio, considering the activity to unit adsorption, was higher in 2-propanol than in chloroform. Consequently, the modification solvent used in the experiment changed the CaCO 3 surface from a hydrophilic, polarized form to a hydrophobic, nonpolarized form. These results will also allow the CaCO 3 produced to be used as a filler in a range of chemical industries.

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Preparation and characterization of well-dispersed waterborne polyurethane/CaCO3 nanocomposites

Cited by 66 publications

References 25 publications

Role of calcium carbonate morphology on thermal and mechanical properties of HDPE

Role of calcium carbonate morphology on thermal and mechanical properties of HDPE

Effect of polyol structure on the properties of the resultant magnetic polyurethane elastomer nanocomposites

Nonpolar Surface Modification Using Fatty Acids and Its Effect on Calcite from Mineral Carbonation of Desulfurized Gypsum

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