ACS Omega
·
2022
·
IF 4.132
Gang Wang,Hua Tan,Chunjing Lu,Ao Sun
SiO2@PEGMA composites were synthesized by grafting poly(ethylene glycol) methacrylate (PEGMA) on SiO2 nanoparticles via radical polymerization. The chemical structures of the SiO2@PEGMA composites were analyzed by Fourier transform infrared, 1H NMR, and transmission electron microscopy methods. The mechanical and fresh properties, hydration products, heat of hydration, microtopography, and pore structures were studied. The shell formed by the grafted PEGMA gave the SiO2@PEGMA composite a steric hindrance effect, which enabled it to have excellent dispersion stability even in the cement pore solution. The SiO2@PEGMA composites could not only effectively facilitate hydration reaction and generate calcium silicate hydrate (C–S–H) through the seeding effect but also make the pore structure more compact by the filling effect. Compared with other control groups, SiO2@PEGMA composites could obviously enhance the compressive strength of cement samples, which was increased by 36.7% after curing for 28 days.
研究领域:
材料科学
·
土木工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 8
·704-710
·
IF 3.2
Dong Wang,Pengxuan Zheng,Zhiwei Yu,Xiangwei Wang,Tingxi Li
Polymer electrolytes are being considered as an effective solution for electrochemical devices to replace currently used organic liquid electrolytes due to their excellent mechanical properties and security. Herein, we prepared stretchable polymer electrolytes (SPEs) doped with poly[(2-acrylamido-2-methylpropanesulfonic acid)- co -poly(ethylene glycol) dimethacrylate] (P(AMPS- co -PEGMA)) and enhanced with poly[(vinylidene fluoride)- co -hexafluoropropylene] (PVDF-HFP), through UV in situ polymerization. The SPEs showed good mechanical performance with an elongation of more than 40% and ionic conductivity reaching the order of 10 −3 S cm −1 . In terms of application, flexible electrochromic devices based on the UV in situ -prepared SPEs were assembled, the color switching performance being still good even after 400 switching cycles and 1000 bending cycles, which indicated that the SPEs could have excellent prospects in application for flexible devices. © 2023 Society of Industrial Chemistry.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2014
·Vol. 47
·期 2
·270-277
·
IF 1.393
Yongli Shi,Suying Ma,Ruiqiong Tian,Yingge Zhao,Qian Jiao,Xu Ma,Qing Shang
A novel amphiphilic copolymer was synthesized from poly (ethylene glycol) methyl ether methacrylate (PEGMA950), methyl methacrylate (MMA) and acryloyl- β -cyclodextrin (acryloyl- β -CD) using the composites of (NH 4 ) 2 S 2 O 8 /NaHSO 3 as the oxidation–reduction initiators. The successful fabrication of poly(PEGMA-co-MMA-co-acryloyl- β -CD) copolymers was confirmed by Fourier transform infrared spectrometer (FTIR), 1 H-nuclear magnetic resonance ( 1 H NMR) spectra. The amphiphilic copolymer could self-assemble into nanoparticles (NPs), and their morphology and particle size distribution were characterized with transmission electron microscopy (TEM), atomic force microscope (AFM) and dynamic light scattering (DLS) methods. Ibuprofen (IBU) was encapsulated in the novel NPs, and the release profiles of IBU were investigated. FTIR and 1 H NMR spectra illustrated that the poly(PEGMA-co-MMA-co-acryloyl- β -CD) copolymers were synthesized without any residual monomers and initiators. TEM and AFM photographs suggested that the obtained NPs were spherical, and the DLS results indicated that the diameter of blank NPs was 157.3 ± 32.7 nm. The IBU release profile showed that the IBU-loaded NPs had certain pH responsibility. Copyright © 2014 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Tingben Huang,Chenxi Tu,Tong Zhou,Zhou Yu,Yuchen Wang,Qiong Yu,Ke Yu,Zhiwei Jiang,Changyou Gao,Guoli Yang
As an alternative strategy to achieve the desired bone augmentation, tenting screw technology (TST) has considerably broadened the indications for implant treatment. Titanium tenting screws are typically used in TST to maintain the space for bone regeneration . However, a high degree of osteogenic integration complicate titanium tenting screw removal and impact the bone healing micro-environment. Previous efforts have been focused on modifying titanium surfaces to enhance osseointegration while ignoring the opposite process. Due to the vital role of bone marrow mesenchymal stem cells (BMSCs) in bone regeneration, it might be feasible to reduce osseointegration around titanium tenting screws by resisting the adhesion of BMSCs. Herein, poly(ethylene glycol)methyl ether methacrylate (poly(PEGMA)) with an optimal length of PEG chain was incorporated with a Ti surface in terms of surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP). The cell apoptosis analysis showed that the new surface would not induce the apoptosis of BMSCs. Then, the adhesive and proliferative behaviors of BMSCs on the surface were analyzed which indicated that the poly(PEGMA) surface could inhibit the proliferation of BMSCs through resisting the adhesion process. Furthermore, in vivo experiments revealed the presence of the poly(PEGMA) on the surface resulted in a lower bone formation and osseointegration compared with the Ti group. Collectively, this dense poly(PEGMA) surface of Ti may serve as a promising material for clinical applications in the future. Statement of significance The poly(ethylene glycol)methyl ether methacrylate (poly(PEGMA)) with an optimal length of PEG chain was grafted onto a Ti surface by surface-initiated activators regenerated by electron transfer atom transfer radical polymerization (SI-ARGET ATRP). The PEGMA surface could reduce the osteogenic integration by preventing the adhesion of cells, resulting in a lower pullout force of the modified implant and thereby desirable and feasible applications in dental surgery.
研究领域:
生物材料
·
生物医学工程
·
骨科
·
牙科手术
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2017
·
IF 1.9
Qing Shang,Sijin Huang,Aixin Zhang,Jia Feng,Song Yang
To improve the bioavailability of ibuprofen (IBU), we developed a novel binary complex of poly(PEGMA-co-MAA) hydrogel and IBU-loaded PLGA nanoparticles (IBU-PLGA NPs@hydrogels) as an oral intestinal targeting drug delivery system (OIDDS). The IBU-loaded PLGA NPs and pH-sensitive hydrogels were obtained via the solvent evaporation method and radical polymerization, respectively. The final OIDDS was obtained by immersing the hydrogel chips in the IBU-loaded PLGA NPs solutions (pH 7.4) for 3 d. The size distribution and morphology of cargo-free NPs were studied by laser granularity analyzer and transmission electron microscope (TEM). The inner structures of the pH-sensitive hydrogel chips were observed with an S-4800 scanning electron microscope (SEM). The distribution states of IBU in the OIDDS were also studied with X-ray diffraction (XRD) and differential scanning calorimetry (DSC). TEM photographs illustrated that the PLGA NPs had a round shape with an average diameter about 100 nm. Fourier transform infrared spectrum (FTIR) confirmed the synthesis of poly(PEGMA-co-MAA) hydrogel. The SEM picture showed that the final hydrogel had 3D net-work structures. Moreover, the poly(PEGMA-co-MAA) hydrogel showed an excellent pH-sensitivity. The XRD and DSC curves suggested that IBU distributed in the OIDDS with an amorphous state. The cumulated release profiles indicated that the final OIDDS could release IBU in alkaline environment (e.g. intestinal tract) at a sustained manner. Therefore, the novel OIDDS could improve the oral bioavailability of IBU, and had a potential application in drug delivery.
研究领域:
药剂学
·
药物递送系统
·
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xinlin Zhu,Zhao Fang,Qinghua Deng,Yang Zhou,Xiaolong Fu,Lizhi Wu,Wuwei Yan,Yong Yang
PEO-based solid electrolytes are eagerly anticipated for being explored in batteries with remarkable performance. Their narrower electrochemical window and weak mechanical strength, however, limit the potential for wide application in safe and high-capacity electronic devices. Herein, a self-healing solid-state electrolyte (PEO@BPIL) is fabricated by the incorporation of an imidazolium-based polymerized ionic liquid (poly(ethylene glycol) monomethacrylate (PEGMA)) block polymer into PEO, and the influence of copolymer configuration on electrochemical performances of the system is investigated in-depth. In addition to reducing the crystallinity of PEO, an inimitable orderly and orderless microphase separation structure is introduced in PEO@BPIL, which brings about a “green fast track” for Li-ion migration. This contributes to a lithium-ion transference number of 0.63 that is an unsurpassed level. The electrochemical stability window of the optimized PEO@BPIL can achieve 5.0 V (vs Li+/Li). As a result, the capacity and endurance discharge performances for PEO@BPIL based cells are significantly improved. Moreover, the bountiful charged ions on the scaffold endue the electrolyte with generous interactions, conferring the PEO@BPIL predominant adhesiveness toward lithium metal (the hanging weight = 200 g) and standout self-healing ability (recovering time <30 min, 60 °C). The restriction toward lithium dendrite is thus enhanced. The PEO@BPIL-based laminate polymer battery presents ascendant antifolding deformation ability and still exhibits good electrochemical performances after reiterative damage. In combination with the high flame retardancy of polymerized ionic liquid, this work affords a splendid idea for an emerging power supply battery.
研究领域:
材料科学
·
电化学
·
能源存储
·
聚合物科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Hailiang Liu,Yueming Liu,Yang Qin,Yan Huang,Kaikai Chen,Changfa Xiao
Inspired of the synergistic effect of the antifouling performance of hydrophilic substance and the self-cleaning function of low surface energy material, we designed and synthesized a kind of macromolecule amphiphilic graft copolymer by the free radical polymerization, which used polyvinyl chloride (PVC) as the main chains, poly(ethylene glycol) methacrylate (PEGMA) as the hydrophilic segment and trifluoroethyl methacrylate (TFEMA) as the low surface energy segment. Then, the amphiphilic PVC-g-PPEGMA/PTFEMA graft copolymer membrane was successfully prepared via surface segregation through the phase inversion process and was further optimized via the forced self-assembly through annealing treatments. The results showed that the PPEGMA chain segments migrated on the membrane surface which driven the PTFEMA chain segments to enrich on the membrane surface during the annealing process, meanwhile, annealing treatment promoted the local microphase separation and improved the mean pore size and the porosity. Based on the synergistic effect of hydrophilic and low surface energy segments, the PVC-g-PPEGMA/PTFEMA graft copolymer membrane obtained the maximum pure water flux of 510.69 ± 16.28 L∙m −2 ∙h −1 , flux recovery rate of 91.49% and rejection rate of 99.31% in the BSA filtration process, which also revealed significantly antifouling properties. More importantly, the PVC-g-PPEGMA/PTFEMA copolymer membrane exhibited long-time hydrophilic stability, which could extend its potential service life.
研究领域:
材料科学
·
膜技术
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2017
·Vol. 295
·期 5
·827-836
·
IF 1.723
Guo Hong,He Ling
Amphiphilic fluorocopolymer P (PEGMA)-co-P (DFHM) is prepared by hydrophobic dodecafluorohrptyl methacrylate (DFHM) and hydrophilic poly (ethylene glycol) methyl ether methacrylate (PEGMA) monomers via atom transfer radical polymerization (ATRP). The self-assembled colloids of P (PEGMA)-co-P (DFHM) in ethanol, dimethylformamide (DMF), tetrahydrofuran (THF), and chloroform (CHCl 3 ) solutions are discussed according to solvent dielectric constants ( ε = 38.3–4.8). The hydrophilic/hydrophobic property, protein resistance, and adhesive strength of films formed by these colloids are evaluated based on the surface morphologies and chemical compositions. P (PEGMA)-co-P (DFHM) can self-assembly into core-shell micelles composed of P (PEGMA) shell and P (DFHM) core (~130 nm) as 500–600 nm in DMF, 300–400 nm in ethanol, and 200–250 nm in THF and CHCl 3 solutions. These colloids provide the film surfaces with high fluorine content (39.40–41.70 wt%) to indicate the migration of fluorine-containing groups onto the film surface during the film formation and therefore the obvious hydrophilic/hydrophobic properties (94.3°–102.4° water contact angles and 58.5°–60.2° cetane contact angles). Comparatively, DMF-casted film gains the highest surface roughness (Ra = 0.98 nm), the lowest fluorine content (39.40 wt%), and the highest surface free energy (20.41 mN m −1 ) due to its large size of colloids, but CHCl 3 -casted film gives the lowest surface free energy (17.82 mN m −1 ). The adhesive strength for DMF- and ethanol-casted films (210 and 168 N) proves higher than THF- and CHCl 3 -casted films (105 and 63 N), while DMF-casted film shows much better protein resistance (Δ f = −15.0 Hz) than other three films (Δ f = −17–20 Hz). It is believed that the obtained P (P EGMA)-co-P(DFHM) could have a promising application as solvent-dependent and protein-resistance coatings.
研究领域:
材料科学
·
生物医学工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2012
·Vol. 3
·期 9
·2656-2664
·
IF 5.321
Chunlei Zhang,Miao Miao,Xueteng Cao,Zesheng An
The arm-first approach is well accepted for the synthesis of core cross-linked star (CCS) polymers, which typically involves two separate steps, i.e., the initial synthesis and purification of the arm polymers followed by a second step synthesis of CCS. We report here a one-pot approach for the RAFT synthesis of a well-defined CCS in water without the separation and purification of the arm polymers. This novel approach consists of a homogeneous polymerization step to prepare the arm polymer, polyPEGMA, and a heterogeneous polymerization step to assemble the arm polymers into CCS polymers. Various parameters affecting the formation of the CCS were studied, including the type of cross-linker, spacing monomer, arm polymer concentration and arm polymer molecular weight. Cross-linkers of longer length provided the flexibility required to form high-quality CCS polymers. The use of spacing monomers in conjugation with cross-linkers reduced the stress during cross-linking and also provided enhanced driving force to produce well-defined CCS polymers. High-quality CCS polymers were prepared at relatively high polymer concentration (≥10%). The higher molecular weight arm polymer exhibited increased steric hindrance for CCS formation. Overall, this one-pot approach is highly efficient, environmentally benign and amenable to a variety of reaction conditions.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Chunning Heng,Meiying Liu,Ke Wang,Fengjie Deng,Hongye Huang,Qing Wan,Junfeng Hui,Xiaoyong Zhang,Yen Wei
Silica nanoparticles (SiO 2 NPs) have been widely applied in a number of domains because of their inodorous, non-pollution, optical transparency, chemical inert and good biocompatibility. However, to achieve better performance, surface modification of SiO 2 NPs to enhance their dispersibility is generally required. In this paper, a simple, facile and environmental friendly procedure was developed for surface modification of SiO 2 NPs with a biocompatible polymer (polyPEGMA) via combination of mussel inspired chemistry and Michael addition reaction for the first time. Firstly, monodisperse SiO 2 NPs were prepared by using a slightly modified Stöber process. Secondly, SiO 2 NPs were coated with polydopamine (PDA), which was formed through self-polymerization of dopamine in an alkaline aqueous solution. Lastly, the PDA coated SiO 2 NPs were facilely conjugated with polyPEGMA, which were synthesized through chain transfer free radical polymerization using cysteamine hydrochloride as chain transfer agent and poly(ethylene glycol) methyl ether methacrylate as the monomer. The successful preparation of these composites was confirmed by a number of characterization techniques including transmission electron microscopy , Fourier transform infrared spectroscopy , thermal gravimetric analysis and X-ray photoelectron spectroscopy. This method obviously enhance the dispersion of SiO 2 NPs in different organic solvents and aqueous solution. This synthetic method is convenient, effective and environmental friendly, that can be also extended to modify SiO 2 NPs with other functional polymers because of the features of mussel inspired chemistry and chain transfer living polymerization .
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Yiyang Zhang,Xiaoming Hu,Fangrong Tian,Dinghe Yan,Yutong Cao,Chun Wang,Jingjing Yan,Dawei Ji,Haolong Xue,Changfa Xiao
Controllable design of ternary PNIPAM-PEGMA-PEI microgel with enhanced hydrophilicity and covalent anchoring • Direct embedding of microgels into polyamide Layer via interfacial polymerization • Long-Term anti-scaling performance with thermally triggered self-cleaning and permeance enhancement As a cutting-edge intelligent membrane material, temperature-responsive composite membranes can reversibly regulate the surface properties and pore size structure of the membrane according to changes in ambient temperature, demonstrating unique application potential in the field of high-temperature separation. In this study, we used fully rigid aromatic poly ( p -phenylene terephthamide) (PPTA) as the porous base membrane and designed a temperature-resistant macromolecule. By introducing hydrophilic poly(ethylene glycol) methacrylate (PEGMA) monomers into the PNIPAM-PEI system, we synthesized the PNIPAM-PEGMA-PEI ternary copolymer microgel, and directly embedded it into the surface separation layer of positively charged polyamide using interfacial polymerization to obtain high-temperature resistant PPTA/PA@[PNIPAM-PEGMA-PEI] nanofiltration membranes, achieving significant reduction in membrane surface contamination rates while maintaining temperature-sensitive regulation of membrane pore size. The membrane exhibited a 57.9% increase in pure water flux at 60 °C and achieved salt rejections above 97% for Na 2 SO 4 , CaCl 2 , and MgSO 4 (5 g/L) at 25 °C. During a 180 h test with periodic thermal transitions, permeance rose from 9.8 to 16.4 L·m −2 ·h −1 ·MPa −1 while retention remained above 89%. This heat-triggered cleaning and reversible pore-size regulation originate from the reversible chain collapse of PNIPAM above its LCST, providing a new strategy for designing highly permeable, regenerable, and anti-scaling nanofiltration membranes for high-temperature desalination and high-salinity wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Yuansong Ye,Jian Huang,Xiaolin Wang
Surface hydrophilicity and the inherent washing force are two crucial factors for constructing an underwater self-cleaning surface. Following this self-cleaning mechanism, we fabricated thermosensitive copolymer brushes of N-isopropylacrylamide (NIPAAm) and poly(ethylene glycol) methacrylate (PEGMA) on the polypropylene (PP) surface. Benefiting from the hydrophilic poly(ethylene glycol) (PEG) side chains, the copolymer brushes with the PEGMA content exceeding 5 mol % exhibited good surface hydrophilicity, whenever at temperatures below or above the lower critical solution temperatures (LCST). Hence their underwater oleophobicity was greatly improved with oil contact angles higher than 141° and oil adhesive forces lower than 20 μN. In addition, the sharp volume-phase transition feature was reserved in their copolymer backbones, as proved by the AFM result. Self-cleaning evaluation of the modified surfaces was performed by a simple temperature-change water cleaning method, after which only 0.2 wt % of oil residues remained on the brush surface of P(NIPAAm-5PEGMA) (with 5 mol % of PEGMA contents). The excellent self-cleaning capability is believed to be ascribed to its balanced surface features in hydrophilicity and the sharper volume-phase transition, when a hydrophilic surface can facilitate oil desorption and an intense conformation change of chain stretching and shrinking can offer the strong washing force to assist oil detachment. This study contributes to development of the underwater self-cleaning surface based on a hydrophilic surface with the chain motion.
研究领域:
材料科学
·
表面化学
✓ 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）