Preparation of Polyacrylate Hollow Microspheres via Facile Spray Drying

Chen, Pingxu; Nan-biao, YE; He, Chaoxiong; Tang, Lei; Li, Shuliang; Sun, Luyi; Li, Yuntao

doi:10.3390/app9020228

Cited by 5 publications

(3 citation statements)

References 23 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface area and average pore diameter of CaCO 3 are tabulated in Table 3. As the feeding rate increased, the surface area decreased and pore diameter increased, which is similar to a previous study by Chen et al [43] where hollow microspheres increased as the feeding rate increased. This was probably attributed to the Ostwald ripening process, where larger particles begin to grow and consume the smaller particles due to the difference in concentration gradient [44].…”

Section: Fesem/edx and Bet Analyses Of Caco 3 Particles Using Differe...supporting

confidence: 90%

Synthesis and Characterization of Spherical Calcium Carbonate Nanoparticles Derived from Cockle Shells

et al. 2020

View full text Add to dashboard Cite

Cockle shells are a natural reservoir of calcium carbonate (CaCO3), which is widely used in bone repair, tissue scaffolds, and the development of advanced drug delivery systems. Although many studies report on the preparation of CaCO3, the development of a nanosized spherical CaCO3 precursor for calcium oxide (CaO) that is suitable to be incorporated in dental material was scarce. Therefore, this study aimed to synthesize a nanosized spherical CaCO3 precursor for CaO derived from cockle shells using a sol–gel method. Cockle shells were crushed to powder form and mixed with hydrochloric acid, forming calcium chloride (CaCl2). Potassium carbonate (K2CO3) was then fed to the diluted CaCl2 to obtain CaCO3. The effect of experimental parameters on the morphology of CaCO3, such as volume of water, type of solvents, feeding rate of K2CO3, and drying method, were investigated using field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffractometry (XRD), Brunauer–Emmett–Teller surface area analysis, and thermogravimetric analysis. Optimized CaCO3 was then calcined to form CaO. XRD analysis of CaCO3 nanoparticles was indicative of the formation of a calcite phase. The well-structured spherical shape of CaCO3 was obtained by the optimum condition of the addition of 50 mL of water into CaCl2 in ethanolic solution with a 1 h feeding rate of K2CO3. Less agglomeration of CaCO3 was obtained using a freeze-drying technique with the surface area of 26 m2/g and average particle size of 39 nm. Spherical shaped nanosized CaO (22–70 nm) was also synthesized. The reproducibility, low cost, and simplicity of the method suggest its potential applications in the large-scale synthesis of the nanoparticles, with spherical morphology in an industrial setting.

show abstract

Section: Fesem/edx and Bet Analyses Of Caco 3 Particles Using Differe...supporting

confidence: 90%

Synthesis and Characterization of Spherical Calcium Carbonate Nanoparticles Derived from Cockle Shells

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The spray-dried PHM had better dispersion and stability, and the dried PHM was floating in water after 24 h. This is due to the high temperature flash evaporation at 160°C during the spray drying process, which makes the hydrophilic chains on the surface of the microspheres solidify instantaneously, and the resulting microspheres have better hydrophilicity. 37 Chemical structure analysis of PHM. The FT-IR spectrum of the PHM is shown in Figure 5 (a).…”

Section: Thermal Properties and Emulsion Stability Of Phmmentioning

confidence: 99%

A sound-absorbing and heat-insulating collagen fiber composite material

Chen

Zhi-hua

2022

Cellular Polymers

View full text Add to dashboard Cite

Using methacrylic acid (MAA) and methyl methacrylate (MMA) as core monomers and polystyrene as the shell layer, polymer hollow microspheres (PHM) with good stability were prepared by using an alkali osmotic swelling method followed by spray drying. The average size of the PHM was approximately 875 nm. As a filling cross-linking agent, the PHM were added to a skin collagen material to disperse and fix, and a “polymer hollow microsphere composite collagen fiber” (PHCC) material was obtained. The results show that the PHM improve the mechanical strength, thermal stability and water resistance of the skin collagen material. The PHCC material has a low thermal conductivity (0.035 W/(K·m)) and excellent sound insulation performance and retains the soft and delicate touch of leather, which has application value in high-grade decorative materials and functional leather. This provides a new approach for developing flexible sound-absorbing thermal insulation materials.

show abstract

“…The micromechanism of the dispersion behavior of polymer-modified rejuvenators in aged asphalt materials is presented by M. Zhao, F. Shen, and Q. Ding. Studies on manufacturing modifiers are also included, such as preparation of polyacrylate hollow microspheres[4] and design of SBS-modified bitumen stabilizer powder based on the vulcanization mechanism[23].…”

mentioning

confidence: 99%