INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Jianfei Li,Hongchi Zhao,Wantai Yang
Exploiting bio-based functional polymers to alleviate the scarcity of petroleum resources has garnered a great deal of interest. The ecofriendliness, plentiful supply, and sustainability of limonene (LM) make it an excellent option. Nevertheless, the self-inhibitory effect of exocyclic allyl and steric hindrance pose significant challenges to the effective synthesis of LM-based polymers. Herein, maleic anhydride (MAH)/vinyl acetate (VAc)/LM terpolymer (PMVLM) microsphere with a controllable size (about 0.68–1.83 μm) and composition was effectively generated by manipulating polymerization parameters via self-stabilized precipitation (2SP) technique, wherein the rise of MAH feed percentage was beneficial for endocyclic double bonds of LM participating in copolymerization and the molar percentage of LM in PMVLM was controlled from 1 to 26%. Besides, PMVLM exhibited excellent killing efficiency against E. coli and the inhibition percentage of the copolymer with 2 mg/mL to 70%. Combined with the merits of VAc, LM, and MAH, PMVLM may also be employed as biomedical materials, biodegradable plastics, eco-friendly coatings, and packaging materials.
研究领域:
材料科学
·
生物医学
·
环境科学
✓ 已验证
DOI
高影响因子
MATERIALS TECHNOLOGY
·
2022
·
IF 3.297
Weiqing Chen,Jianping Zhang,Yun Zhao,Zhengge Wang,Zhaoji Wu,Nannan Wu,Rujing Wang,Zhigang Zhang
In contrast to small fluorescent molecules, fluorescent microspheres are easier to be modified and more stable. In this work, a novel fluorescent microsphere was obtained by ternary copolymerisation of maleic anhydride (MAn), vinyl acetate (VAc) and fluorescent monomer containing Rhodamine B group (FM-Rh B). The morphology, structure, composition and fluorescent performances of the fluorescent microspheres were characterised by scanning electron microscope, Fourier transform infrared spectrometer, UV–vis spectrophotometer, and fluorescence spectroscope. The results show that the surface of the fluorescent microspheres was smooth and free of impurities, which are conducive to its application in the fields of biology and medicine. The microspheres display good fluorescence properties under both blue and green light, which expands the application of these microspheres. It can emit strong fluorescence at 566 nm even in polar solvents. The size of the fluorescent microspheres is in the range of 184–1022 nm and can be controlled by changing polymerisation conditions.
研究领域:
材料科学
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Cheng Zhang,Dong Chen,Wantai Yang
In this paper, we report for the first time the self-stabilized precipitation polymerization of styrene (St), maleic anhydride (MAH), and acrylamide (AM) in isoamyl acetate as the reaction medium. The effects of various reaction parameters, including the reaction medium, monomer concentration, reaction time, and monomer feed ratio, on the morphology and chemical composition of the resultant poly(St/MAH/AM) terpolymer particles were investigated systematically. The experimental results demonstrated that uniform poly(St/MAH/AM) terpolymer particles with the diameter in the range of 50 to 2000 nm were facilely obtained over a wide range of monomer feed ratios of St/MAH/AM (from 40:40:20 to 10:10:80). Furthermore, the chemical composition of the terpolymer particles was largely dependent on the initial monomer feed ratio, which remained almost constant irrelevant of reaction time when the molar ratio of [St]/[MAH] was 1:1. Therefore, the poly(St/MAH/AM) terpolymer particles with a well-defined morphology, uniform size, and controlled chemical composition can be efficiently synthesized via this method, and the anhydride and amide functional groups provide poly(St/MAH/AM) particles with intensive potential for various applications.
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
Nature Communications
·
2024
·Vol. 15
·期 1
·1-8
·
IF 14.7
Sun Yongsheng,Wang Yuzhen,Chen Weibin,Jiang Qingquan,Chen Dongdan,Dong Guoping,Xia Zhiguo
Phosphor-glass composites (PGC) are excellent candidates for highly efficient and stable photonic converters; however, their synthesis generally requires harsh procedures and long time, resulting in additional performance loss and energy consumption. Here we develop a rapid synthetic route to PGC within about 10 seconds, which enables uniform dispersion of Y 3 Al 5 O 12 :Ce 3+ (YAG:Ce) phosphor particles through a particle self-stabilization model in molten tellurite glass. Thanks for good wettability between YAG:Ce micro-particles and tellurite glass melt, it creates an energy barrier of 6.94 × 10 5 zJ to prevent atomic-scale contact and sintering of particles in the melt. This in turn allows the generation of YAG:Ce-based PGC as attractive emitters with high quantum efficiency (98.4%) and absorption coefficient (86.8%) that can produce bright white light with luminous flux of 1227 lm and luminous efficiency of 276 lm W −1 under blue laser driving. This work shows a generalizable synthetic strategy for the development of functional glass composites.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2024
·
IF 2.8
Chenxi Liang,Ye Jia,Hongyi Qi,Mingsen Chen,Yanbin Huang,Wantai Yang
Self-stabilized precipitation (2SP) polymerization enables the facile synthesis of uniform polymer spheres with sizes ranging from 100 nm to 3 μm, without the need for stabilizers or cross-linkers, even at high monomer concentrations of up to 30%. While previous studies have extensively explored the influence of reaction conditions on the size and uniformity of microsphere products, their impact on particle morphology has received less attention. In this work, we demonstrate that particle growth in 2SP polymerization primarily occurs via the adsorption of polymers from the solution onto the particle surface, leading to an increase in particle circularity and a smoother surface. The surface roughness of the particles is controlled by the aggregation of primary particles and the subsequent polymer adsorption process during the growth stage. Smooth microspheres are obtained under conditions of moderate monomer concentration, high initiator concentration, and elevated temperature. Our findings highlight the significance of the particle growth process in determining particle morphology in addition to the well-established role of polymer–solvent interactions during precipitation polymerization.
研究领域:
聚合物化学
·
材料科学
·
胶体科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2025
·
IF 2.4
KeJian Xu,XiangYun Zhao,JiaFu Yu,QinYa Nong,YingXue Zhang,Hao Qian
Polyacrylonitrile (PAN) microspheres are widely used in various fields due to their excellent chemical stability, mechanical strength and tunable structure. In this paper, poly(AN-co-St) microspheres were prepared by self-stabilized precipitation (2SP) polymerization due to its good controllability and easy operability. Due to the significant influence of the solvent on precipitation polymerization, ethyl acetate was selected as the solvent resulting in the good sphericity and size controllability of poly(AN-co-St) microspheres. When the solubility parameter of the solvent system was altered, the morphology of the poly(AN-co-St) microspheres changed from a spherical shape to a floral pattern. The average particle size of these poly(AN-co-St) microspheres could be easily controlled within the range of 0.4–1.0 µm. In addition, the 2SP polymerization attained a maximum yield of 97% at a monomer concentration of 25 wt%. Moreover, because of no addition of the stabilizer in the process of the 2SP polymerization, the poly(AN-co-St) microspheres are much clear. The effect of initiator concentration and crosslinker concentration on poly (AN-co-St) microspheres were also investigated. The benefits of employing the 2SP polymerization technique include excellent sphericity and homogeneity of the microspheres, high production efficiency, the ability to control particle size and straightforward operational procedures, which make the 2SP polymerization highly promising for synthesizing PAN microspheres.
研究领域:
材料科学
·
高分子化学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Liu Yang,Hongyi Shu,Chuang Wang,Dongcang Sun,Changtong Song,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
In recent years, monodisperse functional polymer particles have attracted intensive attention due to their promising prospects in numerous application fields. Herein, monodisperse polymaleimide (PMI) microspheres with excellent thermal stability and a high glass transition temperature were facilely prepared by self-stabilized precipitation polymerization (2SP) of maleimide. The effects of the reaction medium, monomer and initiator concentrations, reaction temperature, and cross-linker dosage on the size and morphology of the as-prepared PMI microspheres were systematically investigated. By simply adjusting the monomer and initiator concentration and reaction temperature, monodisperse spherical PMI microspheres were successfully obtained in high yield (close to 100%) in ethyl acetate with tunable diameters of 0.24–1.08 μm. To elucidate the nucleation, stabilization, and growth mechanism, the size, surface morphology, and molecular weight of the as-prepared PMI microspheres were monitored over the polymerization process. As expected, the particle growth was mainly attributed to the continuous deposition of newly formed PMI chains onto the surface of the PMI nuclei, which is in good agreement with the traditional 2SP process. Furthermore, the intermolecular hydrogen-bonding interactions between imide and carbonyl groups might also exert an important influence on the stabilization and growth of the PMI particles, which were verified by the 2SP polymerization of MI in the presence of urea and succinimide.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yunye Hu,Chenxia Zhang,Zhengjie Jian,Dong Chen,Yuhong Ma,Wantai Yang
Surface molecularly imprinted polymers (SMIPs) are effective adsorbents for the separation and removal of antibiotics owing to their specific selectivity and high efficiency. Herein, a novel kind of glycidyl methacrylate (GMA)-functionalized poly(maleic anhydride- alt -styrene) (PMS) particles (PMS-GMA) are facilely prepared via self-stabilized precipitation polymerization, which can serve as an ideal support matrix for the scalable preparation of SMIPs. Methacrylic acid and ethylene glycol dimethacrylate were copolymerized in the presence of norfloxacin (NOR) template and PMS-GMA carrier to obtain NOR-imprinted SMIPs (PMS@MIPs). Due to the presence of NOR-imprinted layer, the resultant PMS@MIPs can effectively and selectively adsorb NOR, featured with high sorption capacity in short equilibrium time (149.3 mg/g in 60 min). The adsorption behavior of NOR by PMS@MIPs fitted better to pseudo-second-order and Freundlich model. More importantly, PMS@MIPs showed high selectivity for NOR over enrofloxacin and levofloxacin with similar chemical structure, and another commonly used antibiotics sulfonamides. Furthermore, PMS@MIPs exhibited excellent reusability, the NOR molecules can be facilely desorbed under acidic condition and the adsorption capacity of the recycled PMS@MIPs only reduced by 6.9% after four adsorption-desorption process, indicating great potential for selective adsorption of NOR.
研究领域:
材料科学
·
环境科学
·
药物化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2022
·
IF 6.057
Wenxing Jiang,Yingxue Wu,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Herein, monodisperse and nanoporous poly(bismaleimide-co-divinylbenzene) microspheres (PBMs) are fabricated via one-pot self-stabilized precipitation polymerization of 2,2′-bis[4-(4-maleimidophenoxy)phenyl]propane and divinylbenzene in the absence of any dispersants and templates. The particle size, specific surface area, and pore structure of the PBMs could be effectively tailored by tuning the monomer feed ratio and solvent composition. Under optimum reaction conditions, uniform PBMs with a particle size of 1.37 μm were obtained, which exhibit a maximum Brunauer–Emmett–Teller (BET) surface area (556.25 m2/g) and pore volume (0.48 cm3/g). This novel fabrication method for PBMs has significant merits including a simple process free of additives and high efficiency. Furthermore, PBMs loaded with Pd nanoparticles (PBMs@Pd) were easily synthesized via in situ chemical reduction and used as a catalytic microreactor due to their abundant pore structure. As an efficient heterogeneous catalyst for the reduction of 4-nitrophenol (4-NP) by sodium borohydride (NaBH4), the as-prepared PBMs@Pd exhibited excellent catalytic activity with a high turnover frequency value (967.92 h–1) and excellent recyclability. This facile strategy opens up new horizons for the synthesis of porous microspheres with a well-controlled morphology and tunable pore structure, which have great application prospects in the fields of catalysis, adsorption, and energy storage.
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2021
·
IF 5.875
Xiao Kuang,Yuting Hu,Dongxu Chi,Haolin Zhang,Zhonggui He,Yiguo Jiang,Yongjun Wang
A surge of platinum(IV) compounds are utilized or investigated in cancer treatment but their therapeutic outcomes have been greatly compromised by remaining adverse effects and limited antitumor performance, attributable to nonspecific distribution and insufficient activation in tumor site. Herein, we designed a series of disulfide bond introduced Pt(IV)-lipid prodrugs with different branch length, all of which are able to self-stabilize into nanomedicine and be activated by high intracellular glutathione (GSH) level. The impact of precise modification of these prodrugs on their assembly stability, pharmacokinetics and cytotoxicity was probed to establish a connection between chemical structure and antiproliferation efficiency. With optimal assembly manner and delivery efficacy, the longest axial branched Pt(IV) prodrug CSS18 exhibited the most impressive therapeutic outcome, providing a potential path to more efficient nanocarriers for chemotherapeutic agents by chemical modulation and, giving insights into the rational design of reduction responsive platinum delivery system.
研究领域:
药学
·
纳米技术
·
癌症研究
·
药物递送系统
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Wenxing Jiang,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Herein, we report the synthesis of novel heat-resistant microspheres by self-stabilized precipitation copolymerization of styrene (St) and 2,2′-bis[4-(4-maleimidophenoxy)phenyl]propane (BMIP) in an mN-methyl pyrrolidone (NMP)/isopentyl acetate (IPA) mixed solvent. The effects of the solvent composition, monomer feed ratio, monomer, and initiator concentration on the size and morphology of the resultant poly(BMIP-co-St) microspheres were investigated in detail. Monodisperse, highly cross-linked poly(BMIP-co-St) microspheres with number-average diameters ranging from 2.23 to 1.28 μm were successfully obtained at a 1/2 molar ratio of [BMIP]/[St] in NMP/IPA (2/13, v/v). Due to the presence of a rigid imide ring and a highly cross-linked structure, the poly(BMIP-co-St) microspheres exhibited excellent thermal stability with an initial decomposition temperature up to 440 °C and a 30% char residue rate at 750 °C. Additionally, there were some unreacted maleimide groups on the surface of poly(BMIP-co-St) microspheres for further chemical modification, making the poly(BMIP-co-St) microspheres highly interesting as advanced functional materials.
研究领域:
高分子化学
·
材料科学
·
功能材料
·
热稳定性材料
·
聚合物微球
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jin Li,Xin Zhou,Congcong Wu,Li Zhao,Binghai Dong,Shimin Wang,Bo Chi
Challenged by the surface strontium (Sr) enrichment, long-term stability of the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) cathode remains to be the most intractable problem hindering its further development and application in solid oxide fuel cells (SOFCs). To enhance the durability and performance of LSCF-based electrodes, we propose a novel approach by introducing a highly active A-site deficient La 0.95 CoO 3-δ (LC95) thin film onto the surface of the porous LSCF scaffold, simultaneously working as the accepter for Sr diffusion and conformal collector for electrons conduction. Besides the inhibiting effect from the dense coating, the A-site deficiencies reserved in coating lattice enable promising stabilization for Sr diffusion and segregation. At 700 °C, the La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ @La 0.95 CoO 3-δ (LSCF@LC95) hybrid cathode shows a polarization resistance of 0.28 Ωcm 2 , much lower than that for pristine LSCF cathode (0.36 Ωcm 2 ). In addition to the higher electrochemical activity, single cell with LSCF@LC95 cathode exhibits remarkable long-term stability without detectable degradation over 120 h.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）