Cationic core/shell polysiloxane acrylate emulsion: synthesis, film morphology, and performance on cotton pigment coloration

Dai, Xianghui; Xu, Xiaodong; Lei, Yu; Sun, Xiao; Pan, Jianjun; Zhang, Xiaoting; Min, Jie

doi:10.1007/s10570-021-04396-3

Cited by 5 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The possible reaction mechanism during the sol–gel synthesis of the TGP_X aerogels via in situ epoxy ring-opening polymerization is illustrated in Scheme 1 . Here, epoxy ring-opening polymerization was performed by using the epoxy group of GPTMS and the COOH and CONH 2 groups of the PACA polymer, where the COOH and CONH 2 groups acted as a nucleophile and donated a pair of electrons for the epoxy ring-opening polymerization process [ 34 , 35 ], which improves the structural strength of the TGP_X aerogels by forming strong covalent bonds between the GPTMS and PACA polymer. In addition, hydroxyl groups that formed due to the epoxy ring-opening of GPTMS also allowed a further condensation reaction with the hydrolyzed TMOS precursor.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Sol–Gel Synthesis of Highly Insulative Hybrid P(AAm-CO-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

Ransing

Dhavale

Bangi

et al. 2023

Gels

View full text Add to dashboard Cite

Silica aerogels and their derivatives have outstanding thermal properties with exceptional values in the thermal insulation industry. However, their brittle nature restricts their large-scale commercialization. Thus, enhancing their mechanical strength without affecting their thermal insulating properties is essential. Therefore, for the first time, highly thermally stable poly(acrylamide-co-acrylic acid) partial sodium salt is used as a reinforcing polymer to synthesize hybrid P(AAm-CO-AAc)-silica aerogels via epoxy ring-opening polymerization in the present study. Functional groups in P(AAm-CO-AAc) partial sodium salts, such as CONH2 and COOH, acted as nucleophiles for the epoxy ring-opening reaction with (3-glycidyloxypropyl)trimethoxysilane, which resulted in a seven-fold enhancement in mechanical strength compared to that of pristine silica aerogel while maintaining thermal conductivity at less than 30.6 mW/mK and porosity of more than 93.68%. Moreover, the hybrid P(AAm-CO-AAc)-silica aerogel demonstrated improved thermal stability up to 343 °C, owing to the synergetic effect between the P(AAm-CO-AAc) and the silica aerogel, corresponding to the thermal stability and strong covalent bonding among them. These excellent results illustrate that this new synthetic approach for producing hybrid P(AAm-CO-AAc)-silica aerogels is useful for enhancing the mechanical strength of pristine silica aerogel without impairing its thermal insulating property and shows potential as an industrial heat insulation material.

show abstract

Section: Resultsmentioning

confidence: 99%

One-Pot Sol–Gel Synthesis of Highly Insulative Hybrid P(AAm-CO-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

Ransing

Dhavale

Bangi

et al. 2023

Gels

View full text Add to dashboard Cite

show abstract

“…The possible reaction mechanism during the sol-gel synthesis of the TGP_X aerogels via in situ epoxy ring-opening polymerization is illustrated in Scheme 1. Here, epoxy ring-opening polymerization was performed by using the epoxy group of GPTMS and the COOH and CONH2 groups of the PACA polymer, where the COOH and CONH2 groups acted as a nucleophile and donated a pair of electrons for the epoxy ring-opening polymerization process [34,35], which improves the structural strength of the TGP_X aerogels by forming strong covalent bonds between the GPTMS and PACA polymer. In addition, hydroxyl groups that formed due to the epoxy ringopening of GPTMS also allowed a further condensation reaction with the hydrolyzed TMOS precursor.…”

Section: Resultsmentioning

confidence: 99%

One-Pot Sol-Gel Synthesis of Highly Insulative Hybrid P(AAm-Co-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

Ransing¹,

Dhavale²,

Bangi³

et al. 2023

Preprint

View full text Add to dashboard Cite

Silica aerogels and their derivatives have outstanding thermal properties with exceptional values in the thermal insulation industry. However, the brittle nature restricts its large-scale commercialization. Thus, enhancing their mechanical strength without affecting their thermal insulating properties is essential. Therefore, for the first time, highly thermally stable Poly(acrylamide-Co-acrylic acid) partial sodium salt is used as a reinforcing polymer to synthesize hybrid P(AAm-CO-AAc)-silica aerogels via epoxy ring-opening polymerization in the present study. Functional groups in P(AAm-CO-AAc) partial sodium salts, such as CONH2 and COOH, acted as nucleophiles for the epoxy ring-opening reaction with (3-glycidyloxypropyl)trimethoxysilane, which resulted in a seven-fold enhancement in mechanical strength compared to that of a pristine silica aerogel while maintaining the thermal conductivity at less than 30.6 mW/mK and porosity of more than 93.68%. Moreover, the hybrid P(AAm-CO-AAc)-silica aerogel demonstrated improved thermal stability up to 343 ⁰C owing to the synergetic effect between P(AAm-CO-AAc) and the silica aerogel, corresponding to thermal stability and strong covalent bonding among them. These excellent results illustrate that this new synthetic approach for producing hybrid P(AAm-CO-AAc)-silica aerogels is useful for enhancing the mechanical strength of a pristine silica aerogel without impairing its thermal insulating property and shows potential as an industrial heat insulation material.

show abstract

“…Existing methods of grafting polymer chains on the surface of POS are chiefly based on the reactive groups [35] or the silane coupling agent [36] but these traditional routes to graft polymer chains on the surface of POS generally require labor-consuming procedures and have low universality. Exploring an approach with controllability, strong commonality, simplicity, and convenience is urgent.…”

Section: Introductionmentioning

confidence: 99%

Prussian Blue Encapsulated with Brush-like Polyorganosiloxane Nanospheres with Tunable Functionality

Chang,

Chen,

et al. 2024

Coatings

View full text Add to dashboard Cite

Faced with higher demands of pigments in various applications, the performance of pigments in a specific system is in urgent need of optimization and improvement. Polyorganosiloxane (POS) stands out among various encapsulating polymeric materials for pigment modification due to its superior thermal stability and alkali resistance. However, the inherent hydrophobicity of POS causes poor stability in aqueous systems, which is usually applied in environmentally friendly applications. Grafting hydrophilic polymer chains on the surface of POS could improve water dispersity. In addition, the encapsulated pigment can also be endowed with various functionalities by selecting or combining grafted polymers. Herein, we reported a strategy to encapsulate Prussian blue (PB27) with POS grafted with poly(acrylic acid) (PAA) or poly(N-(2-hydroxyethyl) acrylamide) (PHEAA) to allow better stability and functionality of the composite pigment particles, denoted as PB27@POS@PAA or PB27@POS@PHEAA, respectively. The effect of the number of monomers and the amount of initiator potassium persulfate (KPS) on the brush thickness of the grafted polymers was studied, along with various performance properties and the functionality of PB27@POS@PAA and PB27@POS@PHEAA. The dispersity, alkali resistance, and high-temperature stability are studied. The brush-like composite pigment performs better after centrifugation (5000 rpm, 30 min) or treatment under 90 °C when the dosage of grafting monomer AA or HEAA reaches 400 wt%. Optimal alkali resistance was obtained for PB27@POS@PAA (AA, 200 wt%) with a particle size variation of only 31 nm after 8 h. Comparably, PB27@POS@PHEAA behaved worse under similar conditions. Moreover, PB27@POS grafted with PAA was responsive to pH and that with PHEAA showed excellent antifouling properties, which could also be replaced by other functional monomers if needed.

show abstract

Cationic core/shell polysiloxane acrylate emulsion: synthesis, film morphology, and performance on cotton pigment coloration

Cited by 5 publications

References 7 publications

One-Pot Sol–Gel Synthesis of Highly Insulative Hybrid P(AAm-CO-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

One-Pot Sol–Gel Synthesis of Highly Insulative Hybrid P(AAm-CO-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

One-Pot Sol-Gel Synthesis of Highly Insulative Hybrid P(AAm-Co-AAc)-Silica Aerogels with Improved Mechanical and Thermal Properties

Prussian Blue Encapsulated with Brush-like Polyorganosiloxane Nanospheres with Tunable Functionality

Contact Info

Product

Resources

About