Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide

Kumar, M. Saravana; Chung, Jin Suk; Hur, Seung Hyun

doi:10.1186/1556-276x-9-345

Cited by 18 publications

(12 citation statements)

References 25 publications

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“…The MA had an obvious higher ending temperature than the pure PMMA. This enhanced thermal stability could be attributed to free radical generated during AzoIm degradation . The existence of the AzoIm in polymer skeletons was supported by the major peak sets in the X‐ray diffraction (XRD) characterization of four sensor units.…”

Section: Resultsmentioning

confidence: 90%

Facile On‐Site Detection Based on Reactional Wettability Variation

Lin

Zheng

Chen

et al. 2018

Adv Materials Inter

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A new on‐site detection strategy is developed based on reactional wettability variation (RWV), which is induced by the coordination reaction between azoimidazole (AzoIm) ligands on an electrospun polymer membrane and the analytes. A sensor unit is fabricated by implanting photoresponsive AzoIm ligands on an electrospun polymer membrane. Contact angle of analyte solution droplets on the membrane surface is varied by coordination reaction between ligands and analytes. The response variation of each analyte is influenced by the membrane‐forming polymer and the conformation of AzoIm. Based on these two factors, the sensor is expanded into a sensor array to offer on‐site detection. The principle component analysis is further applied to evaluate the detection performance and influential structural factors of the array on those ions. The differential response it works on results from varied binding constants of ion–AzoIm complexes and pH of the analyte solutions. Moreover, the detection of metal ions is extended to the bioinorganic molecule of hemin in the same mechanism. It is envisioned that the application of the RWV general pattern can open new possibilities for detection.

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Section: Resultsmentioning

confidence: 90%

Facile On‐Site Detection Based on Reactional Wettability Variation

Lin

Zheng

Chen

et al. 2018

Adv Materials Inter

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“…The melting temperature of the (PEO) 3 :LiClO 4 complex was 150 • C, while (PEO) 6 :LiClO 4 melts between 50 and 65 • C [21]. The endothermic peak at~120 • C observed for SP5 and SP6 can be assigned to the crystalline (PEO) 3 :LiClO 4 phase, because the melting temperature of PEO was 44.04 • C and PMMA dis not show endothermic peaks associated with melting in the temperature range from −40 to 200 • C [28]. The slightly lower melting temperature observed for SP5 and SP6 partially resulted from their high LiClO 4 :PEO ratio, because these samples were blended with PMMA.…”

Section: Resultsmentioning

confidence: 92%

Fabrication of PEO-PMMA-LiClO4-Based Solid Polymer Electrolytes Containing Silica Aerogel Particles for All-Solid-State Lithium Batteries

2018

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To improve the ionic conductivity and thermal stability of a polyethylene oxide (PEO)-ethylene carbonate (EC)-LiClO4-based solid polymer electrolyte for lithium-ion batteries, polymethyl methacrylate (PMMA) and silica aerogel were incorporated into the PEO matrix. The effects of the PEO:PMMA molar ratio and the amount of silica aerogel on the structure of the PEO-PMMA-LiClO4 solid polymer electrolyte were studied by X-ray diffraction, Fourier-transform infrared spectroscopy and alternating current (AC) impedance measurements. The solid polymer electrolyte with PEO:PMMA = 8:1 and 8 wt% silica aerogel exhibited the highest lithium-ion conductivity (1.35 × 10−4 S∙cm−1 at 30 °C) and good mechanical stability. The enhanced amorphous character and high degree of dissociation of the LiClO4 salt were responsible for the high lithium-ion conductivity observed. Silica aerogels with a high specific surface area and mesoporosity could thus play an important role in the development of solid polymer electrolytes with improved structure and stability.

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“…One possible reason for this is the decomposition temperature. Based on the differential scanning calorimetry results, the thermal decomposition of PINE starts at 150 °C [ 37 ], whereas LPB burns at temperatures higher than raw wood [ 42 ], and PUR foam and PMMA are burned at temperatures higher than 300 °C [ 70 , 71 ]. Therefore, the thermal decomposition of PINE in MIX will occur at a higher temperature than in the PINE fire, the decomposition will be less partial, and the distribution of particles emitted in such a fire will be shifted to smaller diameters.…”

Section: Resultsmentioning

confidence: 99%

Characteristics of Particles Emitted from Waste Fires—A Construction Materials Case Study

et al. 2021

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This study aimed to determine the relative densities of populations of particles emitted in fire experiments of selected materials through direct measurement and parametrization of size distribution as number (NSD), volume (VSD), and mass (MSD). As objects of investigation, four typical materials used in construction and furniture were chosen: pinewood (PINE), laminated particle board (LPB), polyurethane (PUR), and poly(methyl methacrylate) (PMMA). The NSD and VSD were measured using an electric low-pressure impactor, while MSD was measured by weighing filters from the impactor using a microbalance. The parametrization of distributions was made assuming that each distribution can be expressed as the sum of an arbitrary number of log-normal distributions. In all materials, except PINE, the distributions of the particles emitted in fire experiments were the sum of two log-normal distributions; in PINE, the distribution was accounted for by only one log-normal distribution. The parametrization facilitated the determination of volume and mass abundances, and therefore, the relative density. The VSDs of particles generated in PINE, LPB, and PUR fires have similar location parameters, with a median volume diameter of 0.2–0.3 µm, whereas that of particles generated during PMMA burning is 0.7 µm. To validate the presented method, we burned samples made of the four materials in similar proportions and compared the measured VSD with the VSD predicted based on the weighted sum of VSD of raw materials. The measured VSD shifted toward smaller diameters than the predicted ones due to thermal decomposition at higher temperatures.

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Controlled atom transfer radical polymerization of MMA onto the surface of high-density functionalized graphene oxide

Cited by 18 publications

References 25 publications

Facile On‐Site Detection Based on Reactional Wettability Variation

Facile On‐Site Detection Based on Reactional Wettability Variation

Fabrication of PEO-PMMA-LiClO4-Based Solid Polymer Electrolytes Containing Silica Aerogel Particles for All-Solid-State Lithium Batteries

Characteristics of Particles Emitted from Waste Fires—A Construction Materials Case Study

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