INTEGRATED FERROELECTRICS
·
2017
·
IF 0.457
Bo Yang,Guo-Ling Li,Hai-Lin Cong,Bing Yu,Lei Wang,Shu-Jing Yang
In this study, we prepared a porous poly (glycidyl methacrylate) (PGMA) microsphere by modified seed-swelling emulsion polymerization. The structure and morphology of the porous microspheres were characterized by SEM. We discussed the effect of the ratio of crosslinker and monomer on microsphere formation and micropores, and found the most favorable conditions for the preparation of porous PGMA microspheres. The great structure and specific surface area of the porous microspheres and the active functional groups on the surface indicate a wide range of applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Yitong Ding,Mingjiao Li,Wenjing Dong,Ze Kan,Zhibo Li
Chemically synthesized poly(4-hydroxybutyrate) (P4HB) serves as an alternative material for toughening poly(lactic acid) (PLA), but the two materials exhibit poor compatibility, and most compatibilizers fail to localize at the phase interface, resulting in inefficient toughening. In this study, a phase interface-located reactive compatibilizer, poly (glycidyl methacrylate) (PGMA), is synthesized to enhance the interfacial adhesion between PLA and P4HB, thereby improving their compatibility. The PGMA compatibilizer demonstrates a tendency to selectively disperse at the phase interface of PLA and P4HB supported by thermodynamic calculations. Compared to the PLA/P4HB blend, the PLA/P4HB/PGMA blend exhibits enhanced molecular chain entanglement and a blurrier phase interface. Consequently, the mechanical and shape memory behavior of the PLA/P4HB/PGMA blend are improved. For example, the elongation at break of the PLA/P4HB/PGMA blend increased from 20.8 % to 265.1 %, marking an increase of 12.7 times compared to the PLA/P4HB blend. Due to its small molecular weight, the T o n e s e t (onset degradation temperature) of PGMA is only 180.3 °C. Fortunately, the T o n e s e t of the PLA/P4HB/PGMA system exceeds 220 °C after the chain expansion reaction, indicating a significant improvement in thermal stability. Thus, the phase interface-located chain expansion reaction offers an effective approach to improving the compatibility of PLA/P4HB blends while maintaining their high thermal stability.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Tianhao Xia,Yuwen Yuan,Yunpeng Wang,Pragati Awasthi,Wenkun Dong,Xvsheng Qiao,Dong Chen,Shisheng Ling,Xianping Fan
This study aims to advance the development of magnetic fluorescent polymer microspheres for biomedical detection applications. Conventionally, dopants have utilized europium(III) (Eu(III)) organic complexes due to their high compatibility with polymers and strong fluorescence. However, as the common magnetic material Fe 3 O 4 can quench their fluorescence, it is hard to synthesize Eu complex-doped magnetic fluorescent materials. To maintain fluorescence in the presence of magnetic parts, in this work, we synthesized Eu-doped magnetic microspheres with multi-layered structure. Firstly, poly-(glycidyl methacrylate) (PGMA) microspheres were prepared as templates and subsequently coated with layers of Fe 3 O 4 and SiO 2 . Then, the synthesized Eu(TTA) 3 (TPPO) 2 were added into PGMA@Fe 3 O 4 @SiO 2 microspheres in either basic or acidic conditions, and covered them with an extra sol–gel layer of silica at the same time. The microspheres exhibit a core–shell structure with sub-micron dimensions (580 nm) and possess favorable superparamagnetic properties ( M s = 22.02 A·m 2 /kg, M r = 1.37 A·m 2 /kg, H c = 0.242 A/m). But the fluorescence of Eu 3+ are significantly quenched by Fe 3 O 4 , O–H oscillators, and N–H oscillators. Finally, to exclude the quenching mentioned above, the first pure SiO 2 shielding layer and the second Eu(TTA) 3 (TPPO) 2 -dispersed SiO 2 layer were coated onto PGMA@Fe 3 O 4 microspheres to prevent the energy transfer due to the quenching centers and hold the fluorescence of Eu 3+ . These findings underscore the considerable potential of these microspheres exhibiting rapid magnetic separation and stable fluorescence for bioimaging and biosensing applications.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·Vol. 34
·期 6
·2432-2444
·
IF 3.9
Xia Tianhao,Wang Yunpeng,Awasthi Pragati,Dong Wenkun,Li Mengting,Qiao Xvsheng,Chen Dong,Ling Shisheng,Fan Xianping
The separation of target substances is a significant biological detection procedure, where magnetic microspheres can act as high-performance separation materials. However, challenges are still kept to fulfill all the requirements. A submicron magnetic poly (glycidyl methacrylate) (PGMA) microsphere was synthesized in this investigation by utilizing three distinct techniques: in situ coprecipitation, electrostatic self-assembly, and silica surface coating. The PGMA microspheres were initially produced through a soap-free emulsion polymerization technique, wherein the coagulation process was governed by surface charge density. This factor additionally impacted the size and monodispersity of the microspheres. Then, we discovered that the capping agent sodium citrate (Na 3 Cit) effectively regulated the superparamagnetism properties of magnetic microspheres; the critical size of the superparamagnetic was 10.9 nm. Furthermore, the concentration of Fe 2+ and Fe 3+ effectively regulated the saturation magnetization, a property that correlated with the nucleation rate of the Fe 3 O 4 crystal. Additionally, we demonstrated that the pH regulated the electrostatic self-assembly, and it was suggested that positively charged PGMA–NH 2 microspheres and negatively charged Fe 3 O 4 nanoparticles be tightly coupled. For application, the PGMA@Fe 3 O 4 microspheres were subsequently coated with SiO 2 , which had been surface-modified with carboxyl groups. The PGMA@Fe 3 O 4 and carboxyl-modified microspheres exhibited saturated magnetization values of 23.73 and 17.73 emu/g, respectively. These microspheres have been effectively utilized for the extraction of DNA from various sources such as Salmonella typhi, monkeypox virus, and clinical swab samples, suggesting the potential of these microspheres for nucleic acid separation in the biomedical domain.
研究领域:
材料科学
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纳米技术
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生物医学工程
·
生物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2018
·Vol. 94
·期 5
·1441-1450
·
IF 2.587
Ruikui Du,Baojiao Gao,Jiying Men
Background Removing toxic heavy metal ions from water bodies is one of the most important areas of water treatment, and using porous membranes with a chelating function is a good route for this. Graft-type porous membranes with a chelating function are innovate functional membranes. In this work, the main aims are to prepare such a functional membrane and evaluate its adsorption and rejection properties for heavy metal ions in water through adsorption isotherm experiments and permeation experiments. Results Glycidyl methacrylate (GMA) was graft-polymerized on the surface of polysulfone (PSF) microfiltration membrane through a surface initiating system, getting the grafted membrane PSF- g -PGMA. Then the ring-opening reaction of the epoxy group of the grafted PGMA was carried out with iminodiacetic acid (IDAA) as reagent, obtaining PSF -g -PGMA/IDAA membrane, on which a great deal of IDAA as chelating ligand was bonded. PSF -g -PGMA/IDAA membrane possesses a strong adsorption ability towards heavy metal ions via the chelating action and electrostatic interaction. The order of adsorption capacity was Pb 2+ >Cu 2+ >Cd 2+ , and the adsorption capacity of Pb 2+ ion reached 4.5 µmol cm −2 . When an injection filter with a membrane area of 1.77 cm 2 was used, the rejection rate of PSF -g -PGMA/IDAA membrane for the three heavy metal ions with concentrations of 0.1 mmol L −1 were maintained at a level of 95% until the permeation solution volume reached 100 mL. Conclusion The grafted microfiltration membrane PSF -g -PGMA/IDAA can be easily prepared and possesses excellent rejection and removing performance towards heavy metal ions © 2018 Society of Chemical Industry
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELASTOMERS AND PLASTICS
·
2013
·
IF 0.623
Aijie Ma,Qiuyu Zhang,Hepeng Zhang,Youqiang Shi,Yu Liu
2-Phenylimidazole (2-PZ) and polymethyl acrylic glycidyl ester (PGMA) are performed to fabricate a novel microcapsule latent curing agent of 2-PZ/PGMA by solvent evaporation method with 2-PZ as the core material and PGMA as the shell material. A novel single-component 2-PZ/PGMA/epoxy adhesive is also prepared by mixing 2-PZ/PGMA with epoxy resin matrix. The 2-PZ/PGMA microcapsules are characterized using scanning electron microscopy and granulometer. The curing kinetics and thermal properties of 2-PZ/PGMA/epoxy resin system are also investigated using differential scanning calorimeter, Fourier transform infrared spectrometer, and thermogravimetric analysis. Results show that 2-PZ/PGMA has good sphericity and narrow diameter distribution. The curing process of the 2-PZ/PGMA/epoxy resin system contains autocatalytic mechanism. Compared with that of pure epoxy, the presence of the 2-PZ/PGMA has little effect on thermal stability for the epoxy.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2017
·Vol. 36
·期 3
·391-398
·
IF 1.692
Wang Hao,Dai Ting-Ting,Lu Bo-Lun,Li Sheng-Li,Lu Qing,Mukwaya Vincent,Dou Hong-Jing
Dextran-poly(glycidyl methacrylate) (Dex-PGMA) nano-suitcases were synthesized efficiently via a graft copolymerization induced self-assembly (GISA) approach. On this basis, the Dex-PGMA nano-suitcases were modified with hydrazide, and the attachment of multiple chelated Gd(III) ions to the interior of the nano-suitcases affords nanoscale MRI contrast agents with high relaxivity values. The highly fenestrated dextran shell of the nano-suitcases assures water exchange which readily occurs between the surrounding environment and the Gd(III) ions encapsulated within the hybrid nano-suitcases. The complexation between the hydrophilic hydrazide interior of the nano-suitcases and Gd(III) ions results in an impressive Gd payload at 22.6 wt% in the hybrid nano-suitcases. The longitudinal relaxivity (r1) of the hybrid nano-suitcases is reported as 44.4 L/(mmol·s), which is 9–14 folds of that of commercial Gd-DTPA agents. In vivo MRI studies demonstrate that the hybrid nano-suitcases accumulated in the lymph node of the rat due to their nanoscale dimensions and displayed strong signals in vivo . The results indicated that the hybrid nano-suitcases provide a promising platform for the diagnosis of lymph node related diseases.
研究领域:
生物医学工程
·
医学影像学
✓ 已验证
DOI
高影响因子
Materials Advances
·
2021
·Vol. 2
·期 6
·2120-2131
·
IF 0
Chaoshi Chen,Muhammad Atif,Kang He,Miao Zhang,Lijuan Chen,Yanmei Wang
In this work, binary mixed polymer brushes based on poly[(2-methyl-2-oxazoline)-random-glycidyl methacrylate] (PMOXA-r-GMA) and poly(glycidyl methacrylate)-block-poly(N-isopropyl acrylamide)-block-polystyrene (PGMA-b-PNIPAM-b-PSt) were used as thermoresponsive coating to control protein adsorption. Firstly, PMOXA-r-GMA was synthesized via cationic ring opening polymerization of 2-methyl-2-oxazoline followed by its copolymerization with glycidyl methacrylate (GMA); PGMA-b-PNIPAM-b-PSt was synthesized by reversible addition–fragmentation chain transfer polymerization of GMA, N-isopropyl acrylamide, and styrene sequentially. Then the mixed brushes were fabricated successfully by spin coating the mixture of PMOXA-r-GMA and PGMA-b-PNIPAM-b-PSt solutions onto silicon or glass substrates followed by an annealing protocol using GMA segments as an anchor. Afterwards, the investigation for adjusting the hydrophobic property of mixed brushes was performed. The results showed that when the environmental temperature is lower than the lower critical solution temperature (LCST) of PNIPAM, the tethered PNIPAM blocks are swollen and could bring the hydrophobic PSt block with optimum molar mass to the surface; when the environmental temperature is higher than the LCST of PNIPAM, the PNIPAM blocks collapse and could bring the hydrophobic block inside the hydrophilic PMOXA grafted polymer layer. Finally, the protein adsorption on mixed polymer brushes was investigated using a fluorescein isothiocyanate-labelled protein assay and ellipsometrys. The results showed that under the optimum molar mass of PSt block, mixed brushes could adsorb proteins in large quantities below the LCST of PNIPAM, and display resistance to protein adsorption above the LCST of PNIPAM.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
RSC Advances
·
2018
·Vol. 8
·期 5
·2593-2598
·
IF 2.936
Hailin Cong,Bing Yu,Lilong Gao,Bo Yang,Fei Gao,Hongbo Zhang,Yangchun Liu
Microporous, hollow, or macroporous polymer spheres were prepared by a seed emulsion polymerisation method. Different from the conventional seeded emulsion polymerization, the sorbitan monooleate (Span 80) was added to the seeded emulsion polymerization. In this study, the monodisperse PS seeds prepared by dispersion polymerization were swelled by dibutyl phthalate (DBP), glycidyl methacrylate (GMA), divinylbenzene (DVB) and Span 80 successively. The effect of the amount of Span 80 on the morphology of microspheres was investigated. As different amount of Span 80 was added to the mixture, the poly(glycidyl methacrylate-divinylbenzene) (PGMA-DVB) microspheres showed a variety of morphologies containing microporous, hollow, and macroporous structure. In addition, uniform hollow particles with different pore size can be obtained through adjusting the amount of Span 80.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-10
·
IF 3.8
He Xiaoya,Zhou Wenhui
Cotton fiber fabric with practicability and functionality attracts much attention and plays an important role in many occasions. However, its surface contains many hydroxyl groups to show a hydrophilicity, leading to easy adhesion to stains to limit the application. In this work, polyglycidyl methacrylate (PGMA) was used as an oily and flexible matrix and graphene oxide (GO) particles were used as a filler. PGMA/GO composite modified fabrics with hydrophobicity, self-cleaning feature and wear resistance were prepared by constructing surface coatings. Compared with original fabric, PGMA/GO composite modified fabric has a surface hydrophobicity attributed to organic oily characteristic of PGMA, and high surface roughness from GO surface enrichment. The reasonable GO content (1 wt%) in composite coating makes the modified fabric exhibit the best overall performance (surface water contact angle of ~ 151.7°; chromatism of ~ 2.4; large water contact angle of ~ 140.2° after 200 surface wear cycles). This work provides an effective method for an industrial production of high-performance waterproof cotton garment fabrics.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2023
·
IF 2.2
Hong Ye,Yu Kanping
Cotton-based clothing fabrics are welcome because they are warm, close-fitting, hygroscopic and breathable. However, surface hydrophilic hydroxyls will make them easy to stick to stains. High-cost preparing of inorganic nanoparticles can favor a building of hydrophobic coatings for them. To cheaply attain surface self-cleaning attributes of cotton-based fabrics, here, all-organic surface coatings were established utilizing surface-fluorinated uninjured polyglycidyl methacrylate (PGMA)/polyvinylidene fluoride (PVDF) co-modifying. High PVDF dosage incurred a large water contact angle (WCA) of treated fabric, and high hydrophilic attribute of pristine fabric was altered into high hydrophobic one. Antifouling attribute was acquired on the surfaces of treated fabrics, and effective ultraviolet (UV) and wearing resistances of the optimal coating/fabric composite with feeding 10 wt% of PVDF were fulfilled. The optimal fabric surface demonstrates a superhydrophobic attribute (WCA at 153.5 ± 1.5°). After UV irradiating for 24 h or surface abrasion for 100 cycles, this surface demonstrates a WCA surpassing 140° with a water sliding angle below 16°. The fiber weaving constitution and surface F assembling are critical for performance optimizing. The current research may give an effective route for large-area producing of self-cleaning cotton-based fabrics.
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Dong Chaoyang
To improve anti-icing traits of outdoor coatings, a synergy between photothermal and hydrophobic anti-icings was utilized to fabricate copolymer/Ti 3 C 2 T x MXene composite coatings with good transparency and adhesion. MXene contributes to photothermal trait from local surface plasmon resonance effect. Copolymer enables hydrophobicity from perfluoroalkyls-induced low surface energy and high surface roughness. An increase in MXene dose results in an increased surface roughness. With 140.0 ± 2.2° of water contact angle and 70% of light transmittance, the optimal film bears 2 wt% of MXene. High MXene dose results in large temperature-increase of film under sunlight. After 15 min of sunlight exposure, the temperature of optimal film surface in icing simulation increases from − 18 ℃ to 7.2 ℃. After 48 h of acid immersion, the temperature-increase of optimal film surface based on 300 s of sunlight irradiation reaches 28.7 ± 1.2 ℃. After 48 h of ultraviolet irradiation, the temperature-increase of optimal film surface is 30.7 ± 0.8 ℃. This surface has a water contact angle of 132.7 ± 1.1° after 48 h of acid immersion. This study gives impetus to a preparation of various composite coatings for outdoor anti-icing/deicing.
研究领域:
材料科学
·
表面工程
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）