A novel strategy of polystyrene acrylate – Polysiloxane core-shell emulsion for surface protection of cementitious materials

Wu, Cong; Yin, Bing; Hou, Dongshuai; Li, Shaochun; Wang, Xinpeng

doi:10.1016/j.cemconcomp.2022.104720

Cited by 8 publications

(4 citation statements)

References 66 publications

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“…As a classical strategy for the preparation of microspheres, the emulsion method is well-known for its simplicity of preparation and high spherization rate. 29,30 Different emulsion systems can be used for different needs. Among them, the dual water-in-oil-in-water emulsion system protects the laser absorber and polymer by the external aqueous phase.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the melt extrusion method allows one-step microencapsulation, but the inability to obtain individual core–shell microsphere powders limits its commercialization. As a classical strategy for the preparation of microspheres, the emulsion method is well-known for its simplicity of preparation and high spherization rate. , Different emulsion systems can be used for different needs. Among them, the dual water-in-oil-in-water emulsion system protects the laser absorber and polymer by the external aqueous phase. , Then, microspheres with good shape and uniform size are obtained by simply evaporating the organic solvent.…”

Section: Introductionmentioning

confidence: 99%

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Dual Emulsion Fabrication Approach to Core–Shell Microspheres for Polymer Laser Direct Writing

Huang,

Feng,

et al. 2024

ACS Sustainable Chem. Eng.

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A unique BaTiO 3 @PS core−shell microsphere responsive to a near-infrared (NIR) laser is designed and successfully prepared using a dual water-in-oil-in-water emulsion method. The BaTiO 3 powder was precisely encapsulated in the PS resin in a uniformly dispersed state, with an average particle size of 10.8 μm. The core material, BaTiO 3 powder, has a high photothermal conversion efficiency. It cooperates with the external easily carbonized PS to effectively improve the performance of the polymer NIR laser direct writing (LDW). SEM and EDS results confirm the successful preparation of regular microspheres. Raman tests and XPS analysis indicate that the mechanism of black pattern formation of the polymer under the NIR laser is attributed to the generation of amorphous carbon during the LDW process. These core−shell structured microspheres have expanded the application scope of polymer LDW, rendering it more practically valuable. Additionally, this dual emulsion approach has introduced new concepts for designing and fabricating color-changing microspheres.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual Emulsion Fabrication Approach to Core–Shell Microspheres for Polymer Laser Direct Writing

Huang,

Feng,

et al. 2024

ACS Sustainable Chem. Eng.

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“…This layer may significantly inhibit the hydration process and cause problems of the slow development of concrete strength and insufficient strength in the later stage [ 23 , 24 , 25 ]. To address the above-mentioned problem, recently, these hydrophobic organic components are usually designed as emulsified particle forms, as to improve the compatibility and stability of components in water [ 26 , 27 , 28 , 29 ]. The most common polymer particle in aqueous dispersions is latex [ 30 ], such as dispersed butadiene-styrene copolymer mediated by the use of surfactants.…”

Section: Introductionmentioning

confidence: 99%

“…And the emulsified particles may re-emulsify in humid alkaline conditions [ 29 ]. Besides, the applications based on dispersed polymer particles in core-shell structures are mostly limited to surface protection of cementitious materials [ 26 , 27 , 28 ], with barely any insights into the bulk water-repellent modification of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Effects of an Amphiphilic Micelle of Diblock Copolymer on Water Adsorption of Cement Paste

et al. 2023

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To reduce the inhibiting effects of polystyrene-based emulsion on the hydration process and strength development of cementitious materials, an amphiphilic diblock copolymer polystyrene-block-poly(acrylic acid) (PS-b-PAA) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization and demonstrated in cement paste system for improving the resistance to water absorption without significantly reducing 28-day compressive strength. Firstly, the dissolved PS-b-PAA was added into water, and it quickly self-assembled into amphiphilic 80 nm-sized micelles with hydrophobic polystyrene-based core and hydrophilic poly(acrylic acid)-based shell. The improved dispersion compared to that of polystyrene emulsion may minimize the inhibiting effects on strength development, as the effects of PS-b-PAA micelle as hydrophobic admixtures on rheological properties, compressive strength, water absorption, hydration process, and pore structure of 28-day cement pastes were subsequently investigated. In comparison with the control sample, the saturated water absorption amount of cement pastes with 0.4% PS-b-PAA was reduced by 20%, and the 28-day compressive strength was merely reduced by 2.5%. Besides, the significantly increased hydrophobicity instead of slightly decreased porosity of cement paste with PS-b-PAA may contribute more to the reduced water adsorption characteristics. The study based on prepared PS-b-PAA micelle suggested a promising alternative strategy for fabricating polystyrene-modified concrete with reduced water absorption and unaffected compressive strength.

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Topologically optimized polystyrene acrylate-polysiloxane copolymer coatings toward superior durability of cementitious materials

Wu,

Li,

Hou

et al. 2024

Construction and Building Materials

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A novel strategy of polystyrene acrylate – Polysiloxane core-shell emulsion for surface protection of cementitious materials

Cited by 8 publications

References 66 publications

Dual Emulsion Fabrication Approach to Core–Shell Microspheres for Polymer Laser Direct Writing

Dual Emulsion Fabrication Approach to Core–Shell Microspheres for Polymer Laser Direct Writing

Effects of an Amphiphilic Micelle of Diblock Copolymer on Water Adsorption of Cement Paste

Topologically optimized polystyrene acrylate-polysiloxane copolymer coatings toward superior durability of cementitious materials

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