Fabrication and characterization of 1 D Fe3O4/P(NIPAM–MAA–MBA) nanochains with thermo- and pH-responsive shell for controlled release for phenolphthalein

Ma, Mingliang; Ma, Yong; Zhang, Baoliang; Zhang, Hepeng; Geng, Wangchang; Zhang, Qiuyu

doi:10.1007/s10853-015-8868-5

Cited by 10 publications

(8 citation statements)

References 36 publications

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“…Fe 3 O 4 microspheres often impart a tolerance to head-to-tail arrangement along the magnetic force lines under a magnetic field, because they undergo a process of magnetic field induced self-assembly 26 27 . So it is promising to enrich the PANI nanostructures when utilizing (I) amino-Fe 3 O 4 microspheres under an external magnetic field in the polymerization.…”

Section: Resultsmentioning

confidence: 99%

Amino-Fe3O4 Microspheres Directed Synthesis of a Series of Polyaniline Hierarchical Nanostructures with Different Wettability

Chen

Hou

et al. 2016

Sci Rep

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We demonstrated polyaniline (PANI) dimensional transformation by adding trace amino-Fe3O4 microspheres to aniline polymerization. Different PANI nanostructures (i.e., flowers, tentacles, and nanofibers) could be produced by controlling the nucleation position and number on the surface of Fe3O4 microspheres, where hydrogen bonding were spontaneously formed between amino groups of Fe3O4 microspheres and aniline molecules. By additionally introducing an external magnetic field, PANI towers were obtained. These PANI nanostructures displayed distinctly different surface wettability in the range from hydrophobicity to hydrophilicity, which was ascribed to the synergistic effect of their dimension, hierarchy, and size. Therefore, the dimension and property of PANI nanostructures can be largely rationalized and predicted by adjusting the PANI nucleation and growth. Using PANI as a model system, the strategies presented here provide insight into the general scheme of dimension and structure control for other conducting polymers.

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Section: Resultsmentioning

confidence: 99%

Amino-Fe3O4 Microspheres Directed Synthesis of a Series of Polyaniline Hierarchical Nanostructures with Different Wettability

Chen

Hou

et al. 2016

Sci Rep

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“…The preparation process of the dual-responsive multicompartmental microcapsules is briefly illustrated in Figure 1. In our strategy, temperature-sensitive polymer particles (pNIPAM particles) were first prepared by a facile one-step precipitation polymerization of N-isopropyl acrylamide (NIPAM) and methylene-bis-acrylamide (MBA), 35 which were used as a container for loading Nile Red (NR) and served as Pickering emulsifiers to stabilize emulsion droplets at the same time. The design and synthesis of the responsive Pickering emulsifiers (pNIPAM particles) are key to the preparation process of the dual-responsive multicompartmental microcapsules.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Temperature/pH Dual-Stimuli-Response Multicompartmental Microcapsules via Pickering Emulsion for Preprogrammable Payload Release

Chen

Wei

Zhu

et al. 2020

ACS Appl. Mater. Interfaces

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Stimuli-responsive microcapsules, which can release the encapsulated payload under various environmental stimuli, have attracted great interests of the food, pharmaceutical, cosmetics, and agricultural fields in recent years. However, most reported responsive microcapsules normally have a single storage area and thus load/release only one type of payload under one stimulus. In this work, we fabricated a novel kind of multicompartmental intelligent microcapsule with two storage areas and independently controlled (preprogrammable) releasing behavior under different stimuli via rapid photopolymerization of Pickering emulsions. In our strategy, a temperature-sensitive polymeric (Nisopropyl acrylamide, pNIPAM) particle was prepared and loaded with Nile Red (NR), which was then employed as a Pickering emulsifier to stabilize oil-in-water droplets. The oil was composed of pH-responsive monomers and oil-soluble fluorescent green (OG). Upon exposure to photoirradiation, pH-responsive monomers were polymerized along the interior of the droplets and converted into microcapsules. With NR in the temperature-sensitive pNIPAM@NR particles and OG in the interior of the microcapsules, the as-prepared microcapsules possess dual-carrier capability with two payloads encapsulated dependently in two different compartments. In addition, the microcapsules could respond to two different external stimuli (temperature and pH) and realize the selective and independent release of encapsulated molecules (NR and OG) from the shell and core without any mutual interference. More importantly, the release of NR and OG can be programmed by preprogramming the order of the stimulus responses, which can be altered. Our work develops a simple and effective strategy to fabricate responsive multicompartment microcapsules with preprogrammable release of different molecules.

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“…1–4 On one hand, the shell layer can protect the core materials from oxidation and improve their compatibility and stability; on the other hand, the outer layer materials may also provide a platform for surface modification to obtain multifunctional materials. 5,6 Among these, Cu@Ag bimetallic nanomaterials instead of single copper nanoparticles (CuNPs) or silver nanoparticles (AgNPs) are considered to be a desired option to overcome the high cost of Ag and to prevent the spontaneous oxidation of Cu. 7…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] On one hand, the shell layer can protect the core materials from oxidation and improve their compatibility and stability; on the other hand, the outer layer materials may also provide a platform for surface modification to obtain multifunctional materials. 5,6 Among these, Cu@Ag bimetallic nanomaterials instead of single copper nanoparticles (CuNPs) or silver nanoparticles (AgNPs) are considered to be a desired option to overcome the high cost of Ag and to prevent the spontaneous oxidation of Cu. 7 Currently, various methods have been developed for preparing of Cu@Ag core-shell particles, such as physical vapor deposition, 8 the pulsed wire evaporation method, 9 electroless plating (also called spontaneous displacement reaction), 10 thermal evaporation under ultrahigh vacuum, 11 the redox-trans-metalation method in aqueous solution, 12 the solvothermal method, 13 the polyol process, 14,15 etc.…”

Section: Introductionmentioning

confidence: 99%

A Simple Route to Synthesize Cu@Ag Core–Shell Bimetallic Nanoparticles and Their Surface-Enhanced Raman Scattering Properties

et al. 2016

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Water-dispersed Cu@Ag core-shell nanoparticles (NPs) with 15 nm-diameter Cu core and 5 nm-thick Ag shell can be synthesized by a facile one-step chemical reduction at room temperature without any protective atmosphere. To obtain a homogeneous Ag coating on Cu, the influence of [Cu/Ag] molar ratio was investigated. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) confirmed that Ag formed a dense coating on the surface of Cu, and that phase-pure spherical Cu@Ag core-shell bimetallic NPs were prepared when the [Cu/Ag] molar ratio was between 1/0.5 and 1/0.75. The time dependence of ultraviolet-visible (UV-Vis) spectra and XRD patterns of six-month stored Cu@Ag NPs showed that the as-prepared Cu@Ag NPs have a long-term antioxidant activity. Also, the surface-enhanced Raman scattering (SERS) signals had a high stability and reproducibility for the substrates. Hence, the as-prepared Cu@Ag nanostructures can be used as an efficient substrate for SERS signals.

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Fabrication and characterization of 1 D Fe3O4/P(NIPAM–MAA–MBA) nanochains with thermo- and pH-responsive shell for controlled release for phenolphthalein

Cited by 10 publications

References 36 publications

Amino-Fe3O4 Microspheres Directed Synthesis of a Series of Polyaniline Hierarchical Nanostructures with Different Wettability

Amino-Fe3O4 Microspheres Directed Synthesis of a Series of Polyaniline Hierarchical Nanostructures with Different Wettability

Synthesis of Temperature/pH Dual-Stimuli-Response Multicompartmental Microcapsules via Pickering Emulsion for Preprogrammable Payload Release

A Simple Route to Synthesize Cu@Ag Core–Shell Bimetallic Nanoparticles and Their Surface-Enhanced Raman Scattering Properties

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