POLYMER
·
2026
·
IF 5.1
Tianyu Liu,Xuening Li,Yunhan Wu,Yunjie Cai,Tong Shen,Mingmei Wang,Xinping Zhang,Zezhong Lin,Rongchao Xue,Chong Wang,Guiying Zhu
PVC as an important plastic material, has gained widespread application due to its excellent physical properties, good heat and chemical resistance, as well as low cost. By incorporating plasticizers and other plastic additives, rigid PVC can be extended to applications in the flexible PVC field. However, conventional low-molar-mass phthalate plasticizers tend to migrate from the PVC matrix to the external environment during long-term use. This migration not only deteriorates the physical properties of PVC but also poses risks to human health and the environment. Therefore, improving the stability of plasticizers in PVC materials is of great significance.In this study, two structurally different plasticizers were prepared by hydroxyl-initiated ring-opening polymerization of ε-caprolactone. The mechanical properties of PVC plasticized with Lignin-PCL, C 5 H 12 O-PCL, and the conventional plasticizer DOP were compared. The results show that PVC plasticized with Lignin-PCL exhibited improved mechanical properties compared to those plasticized with the conventional plasticizer. Interestingly, the hyperbranched plasticized PVC demonstrated higher modulus, strength, and toughness than its linear counterpart. The resulting plasticized PVC materials exhibited a high modulus of approximately 30 MPa while ensuring an elongation at break exceeding 300%. The migration rates of all Lignin-PCL-PVC samples were below 5%, which is only 0.026 times that of DOP-PVC. Moreover, as both lignin and PCL are degradable and environmentally friendly materials, the degradation performance of the materials was also investigated. The study found that the hyperbranched plasticizer Lignin-PCL could be degraded by more than 80%, which is crucial for the development of environmentally friendly flexible PVC materials.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xuesong Chen,Lida Wang,Zhongqiang Yu,Xu Chen,Wen Sun,Zhengqing Yang,Qian Wang,Junhai Luo,Guichang Liu
Synergistic scale inhibition integrating electrochemical water softening (EWS) with scale inhibitors is proposed as a process-intensified strategy to mitigate scaling and enable higher cycles of concentration (CoC) in circulating cooling water systems. Distinct from conventional linear UCST-type polymers, the star-shaped topology introduces a confined internal architecture and elevated local functional group density, which strengthen cooperative intramolecular hydrogen bonding and enable a sharper and more controllable upper critical solution temperature (UCST) transition. A temperature-responsive star-shaped polymer scale inhibitor (star-SI) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization and exhibits reversible conformation contraction–expansion behavior. At high temperatures, the scale inhibition performance of star-SI remains unaffected by the electric field and electrode reactions, achieving an inhibition efficiency exceeding 95%. At low temperatures, star-SI does not interfere with cathodic precipitation in EWS, yielding a CaCO 3 precipitation rate of up to 16.05 g/(m 2 ·h) at 36 A·m −2 . Molecular simulations and electrochemical analyses indicate that star-SI adopts a contracted conformation at low temperatures and exhibits negatively charged characteristics near the cathode and alkaline interfaces, thereby minimizing interference with electrochemical softening. Additionally, star-SI adsorbs onto the surface of CaCO 3 crystals, modulating growth kinetics and delaying nucleation at the heating interface. This synergistic system enables a novel treatment mode of room-temperature hardness removal and high-temperature scale inhibition.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Hui Bai,Yinan Zhao,Shuxian Zhang,Lei Chen
Star-Phe-CD exhibited enhanced host-guest recognition. • The prepared CSP presents superior selectivity with an α value from 1.55 to 1.9. • Simultaneous separation of two catechin epimer pairs is realized. • The CSP enables efficient monitoring of epimer transformation by LC-MS. • The chiral recognition mechanism is clarified via molecular docking. The active ingredients of natural products represent a critical source for innovative drug discovery. However, the poor stereochemical stability and transformation of stereoisomers during storage directly influence therapeutic efficacy and safety. Therefore, the development of new chiral stationary phases (CSPs) with high chiral and structural selectivity is imperative for reliable quality control of natural products. Here, a star phenylalanine cyclodextrin (CD) polymer, Star-Phe-CD, was designed and synthesized. It features a CD parent nucleus, with Phe-derivatized CD as the sidechain monomers. Subsequently, a mixed-mode Sil-Star-Phe-CD CSP was fabricated with Star-Phe-CD as the chiral ligand, which exhibited significant fluorescence enhancement effects and multiple mixed-mode chromatographic retention mechanisms. The Sil-Star-Phe-CD CSP exhibits exceptional shape selectivity and stereoselectivity towards structurally similar analytes, demonstrating outstanding stereoseparation selectivity for analytes with rigid structures or multiple benzene rings with α lansoprazole = 1.90 and α atropine = 1.55, respectively. Coupled with LC-MS analysis, an online approach was established to simultaneously separate two pairs of catechin epimers and monitor their epimerization process. Molecular docking studies revealed the mechanism of chiral recognition, which relies on the cooperative effects of diverse intermolecular interactions, including hydrogen bonding, π–π interactions, and hydrophobic interactions. These interactions are crucial for recognizing structurally similar stereoisomers in complex systems.
✓ 已验证
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2024
·
IF 4.1
Guiru Ding,Xudong Liu,Weidong Yu,Yan Bing,Ning Sun,Hongji Jiang
To investigate the effects of trifluoromethyl and tert -butyl moieties on the general optoelectronic properties of star-shaped hosts based on phenyls substituted carbazole, we used 3,6,9-tris (4-( tert -butyl)-phenyl)-9 H -carbazole ( M1 ) as a reference, and different numbers of electron-withdrawing 3,5-bis(trifluoromethyl) benzene were introduced into 3, 6 and 9 positions of carbazole to obtain compounds 9-(3,5-bis(trifluoromethyl)phenyl)-3,6-bis(4-( tert -butyl)phenyl)-9 H -carbazole ( M3) , 3,6-bis(3,5-bis(trifluoromethyl)phenyl)-9-(4-( tert -butyl)phenyl)-9 H -carbazole ( M5) and 3,6,9-tris(3,5-bis(trifluoromethyl)phenyl)-9 H -carbazole ( M6) . After the introduction of 3,5-bis (trifluoromethyl) benzene, the thermal temperature at 5 % mass loss of M3 , M5 and M6 decreased to 344 °C, while the glass transition temperature and melting point of M3 and M5 showed a significant increase. However, M6 did not show obvious glass transition, but its melting point also showed a significant increase. M3 crystallized at 125 °C as evidenced by differential scanning calorimetry, and the linking model of M3 is helpful to crystalize. In addition, when compared with those of M1 , the fluorescence emission peaks of M3 and M6 showed a blue-shift, while M5 showed a red-shift, all of which were in the deep blue emission range. The color purity of blue light for M1 in tetrahydrofuran solution is the highest, and M1 exhibit aggregation-induced emission characteristics. Compared to the photoluminescence quantum efficiency (PLQY) of compound M1 of 39 % in toluene, the PLQYs of M3 and M6 decreased to 34 % and 29 %, and the PLQY of M5 increased to 46 %. The function of the lowest unoccupied molecular orbital trap of M3 film under the external electrical field will increase, which not only offsets the increasing effect of the electrical field to the electron carrier and further decreases the carrier mobility when the electrical field increase, and the same situation is also feasible for the highest occupied molecular orbital traps in M5 , M6 and M1 . The organic blue light emitting diodes were prepared by using M1 , M3 , M5 and M6 as the hosts of bis [2-(4,6-difluorophenyl)pyridinato-C 2 ,N](picolinato)iridium, and the optimized device of M1 as the host showed the best performance with a maximum luminescence brightness of 2978 cd/m 2 , maximum current efficiency of 39.42 cd/A and maximum external quantum efficiency of 18.36 %.
研究领域:
材料科学
·
光电化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2015
·
IF 2.358
Jie Yi,Congshu Huang,Haiyan Zhuang,Hui Gong,Chuyi Zhang,Runtao Ren,Yupu Ma
The star-shaped polyester polyols based on initiators (trimethylolpropane or pentaerythritol) and ɛ-caprolactone were prepared by polycondensation reaction. The degradable polyurethane (PU) films were prepared by mixing star-shaped polyester polyols and crosslinker agent (hexamethylene diisocyanate trimer). The hydrolytic degradation and water absorption experiments demonstrated that the PU films could erode in artificial sea water, which were controlled by varying the ratios of ɛ-caprolactone/trimethylolpropane and the arm number of star-shaped polyester polyols. The mechanical properties of PU films and coatings increased with decreasing the ratios of ɛ-caprolactone/trimethylolpropane and increasing the arm number of star-shaped polyester polyols. The surfaces of PU films and coatings kept eroding, which were revealed by scanning electron microscopy. The copper ion release rates from PU coatings reached steady state at about 31 days. The marine field tests of PU coatings demonstrated that the degradable PU coatings based on star-shaped polyester polyols were effective coatings for marine antifouling.
研究领域:
材料科学
·
海洋生物学
·
化学工程
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-8
·
IF 4.259
Chen Qijing,Shi Ting,Han Fei,Li Zihan,Lin Chao,Zhao Peng
A hydrophobic CCS polymer of poly(benzyl methacrylate) (PBzMA) was prepared in toluene by reversible addition-fragmentation chain transfer (RAFT)-mediated dispersion polymerization. The CCS polymer, with poly(benzyl methacrylate) as the arm and crosslinked N , N ′-bis(acryloyl)cystamine (BAC) as the core, was confirmed by characterization with gel permeation chromatography (GPC) and nuclear magnetic resonance (NMR) spectroscopy. Three kinds of oils (toluene, anisole and styrene) were chosen to study the emulsification properties of PBzMA CCS polymer. The oils can be emulsified by CCS polymer to form water-in-oil (w/o) emulsions. Moreover, w/o high internal phase emulsions (HIPEs) can be obtained with the increase of toluene and styrene volume fractions from 75% to 80%. Porous polystyrene monolith and microparticles were prepared from the emulsion templates and characterized by the scanning electronic microscopy (SEM). With the internal phase volume fraction increased, open-pore porous monolith was obtained.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chong Wang,Rong-Chao Xue,Ze-Zhong Lin,Xing-Ping Zhang,Pei-Yao Chen,Yu Chen,Hai-Chao Li
Flexible plasticized poly(vinyl chloride) (PPVC) is widely used in medical devices; however, achieving persistent antibiofouling functionality after significant mechanical deformation and long-term water exposure remains a critical challenge. In this work, we introduce amphiphilic heterografted multi-arm star copolymers, polyethylenimine (PEI) cores functionalized with polyethylene glycol (PEG) and poly(ε-caprolactone) (PCL) arms (denoted as PEI-g-PEG-PCLs), as multifunctional additives for modifying PPVC. Dynamic light scattering (DLS) and optical transmittance measurements confirmed the formation of PEI-g-PEG-PCL micelles within the PPVC matrix. The incorporation of PEI-g-PEG-PCLs improved not only the mechanical and thermal properties of PPVC but also its surface hydrophilicity. The resulting composites demonstrated exceptional resistance to biofouling, reducing protein adsorption by 96.2–97.3 % for bovine serum albumin and 98.0–99.8 % for lysozyme, and lowering bacterial adhesion rates to 11 % for Escherichia coli and 19 % for Staphylococcus aureus. Furthermore, platelet adhesion and hemolysis assays confirmed the biocompatibility of the PEI-g-PEG-PCL/PPVC composites. Notably, even after undergoing three cycles of 50 % strain, the optimal PEI-g-PEG-PCL/PPVC composite retained over 91 % of its initial anti-protein fouling performance. Long-term immersion in physiological conditions (28 days) further demonstrated its durability, with more than 92 % of the original antifouling efficacy maintained. The multi-arm star topology accompanied with the long PCL arm is proposed to resolve the “entanglement–migration paradox” commonly encountered in linear or less branched polymer additives. This study presents a molecular engineering strategy for developing durable antibiofouling polymers capable of withstanding both mechanical stress and prolonged aqueous exposure in medical applications.
研究领域:
高分子科学
·
生物医学工程
·
材料科学
·
抗污材料
·
医疗器械
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Tianyu Liu,Yunjie Cai,Tong Shen,Yunhan Wu,Qi Mu,Ranxue Chen,Zezhong Lin,Rongchao Xue,Chong Wang,Guiying Zhu
Polyvinyl chloride (PVC) is an important plastic material. How to enhance the stability of plasticizers in PVC materials is crucial. In this work, internal plasticization was achieved through the ring-opening polymerization (ROP) of polycaprolactone (PCL) grafted from the unsubstituted hydroxyl groups of cellulose acetate (CA). A series of hyperbranched copolymers (CA-HPCL) with CA acetate-rich hard core and PCL-rich soft shell were prepared. Under similar elongation at break conditions, PVC plasticized with CA-HPCL shows higher modulus, strength, and toughness than linear plasticized PVC and other traditional low-molar-mass plasticizers without hard cores. The obtained plasticized PVC material exhibits a high modulus of approximately 30 MPa while ensuring an elongation at break of more than 300%. Further DSC and FTIR characterizations, combined with a comparison with the linear C 5 H 12 O-PCL plasticizer, reveal that this high rigidity is attributed to the physical cross-linking effect of CA-HPCL on PVC chains. Meanwhile, the migration stability test shows that CA-HPCL exhibits excellent anti-migration properties in PVC matrix. The migration rates of all CA-HPCL-PVC samples are lower than 5%, which is only 0.072 times that of DOP-PVC. Therefore, such films with excellent flexibility, elongation and high modulus are expected to be widely applied in the medical industry.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 11
·1816
·
IF 5.1
Sanyuan Qiao,Luoqi Cui,Li Cai,Zhenzhong Fan
ASP flooding wastewater contains crude oil, suspended solids, anionic polymers and surfactants, with high viscosity, high zeta potential, difficult demulsification, flocculation and slow separation and sedimentation. In order to solve the problem of wastewater treatment of ASP flooding in oil fields, a magnetic branched core was prepared from ethyl silicate (TEOS), nano Fe3O4and aminopropyl triethoxysilane (APTES), and then reacted with polyamine and methyl acrylate to synthesize the magnetic hyperbranched molecule FSNMN with demulsification ability. Using acrylamide (AM), acryloxyethyl trimethylammonium chloride (DAC) and maleic anhydride (MA) as raw materials, cationic polymer long chain (CAMHA) with flocculating properties was synthesized and grafted with hyperbranched molecules. The demulsification flocculation ability of the product regarding ASP flooding wastewater was evaluated, and the demulsification flocculation mechanism was summarized. The results showed that the average molecular weight of 3-FSNMN4-C was 4.7 million, the cationic degree was 20.5%, and the saturation magnetization was 20 EMU/g. The removal rate of oil and suspended solids was 93.82% and 91.95% respectively when the simulated sewage was treated by magnetic field for 30 min. Magnetic hyperbranched star chain polymer provides a solution to the serious ecological environment problems caused by ASP flooding.
✓ 已验证
DOI
PubMed
高影响因子
Electronics
·
2024
·Vol. 13
·期 11
·2057
·
IF 2.6
Antonios Chatzisavvas,Michael Dossis,Minas Dasygenis
The A-star algorithm (A*) is a traditional and widely used approach for route planning in various domains, including robotics and automobiles in smart agriculture. However, a notable limitation of the A-star algorithm is its tendency to generate paths that lack the desired smoothness. In response to this challenge, particularly in agricultural operations, this research endeavours to enhance the evaluation of individual nodes within the search procedure and improve the overall smoothness of the resultant path. So, to mitigate the inherent choppiness of A-star-generated paths in agriculture, this work adopts a novel approach. It introduces utilizing Bezier curves as a postprocessing step, thus refining the generated paths and imparting their smoothness. This smoothness is instrumental for real-world applications where continuous and safe motion is imperative. The outcomes of simulations conducted as part of this study affirm the efficiency of the proposed methodology. These results underscore the capability of the enhanced technique to construct smooth pathways. Furthermore, they demonstrate that the generated paths enhance the overall planning performance. However, they are also well suited for deployment in rural conditions, where navigating complex terrains with precision is a critical necessity.
✓ 已验证
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 17
·3691
·
IF 4.967
Yuan Zhang,Peng Wang,Nan Li,Chunyan Guo,Sumin Li
Linear and star block copolymer (BCP) nanoparticles of (polystyrene-block-poly(4-vinylpyridine))n(PS-b-P4VP)nwith arm numbers of 1, 2, 3, and 4 were prepared by two methods of polymerization-induced self-assembly (PISA) and general self-assembly of block copolymers in the low-polar organic solvent, toluene. The effect of the arm number on the size and/or morphology of the (PS-b-P4VP)nnanoassemblies synthesized by the two methods in toluene and on the polymerization kinetics was investigated in detail. Our results show that in toluene, a low-polar solvent, the topology not only affected the morphology of the BCP nanoparticles prepared by PISA, but also influenced the BCP nanoparticles synthesized through general self-assembly.
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 9
·2071-2082
·
IF 2.41
Fu Yutong,Xia Xinyu,Zhang Yan,Ye Jinhai,Lang Meidong
Functional star-shaped 4-arm poly(ethylene glycol)- b -poly[( ε -caprolactone- co - γ -amino- ε -caprolactone)] (4-arm PEG- b -P(CL- co -ACL) was synthesized through ring-opening polymerization. The structure of the copolymer was confirmed by 1 H NMR, Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). To further understand the copolymers, the difference of the conversion rate between ε -caprolactone (CL) and γ -(carbamic acid benzyl ester)- ε -caprolactone (CABCL) and the detailed deprotection condition were studied. The thermal property of the copolymer was analyzed by WAXR and differential scanning calorimetry (DSC), which demonstrated that the thermal property could be well adjusted. The pH-responsive behavior of the copolymers was studied in detail by dynamic light scattering (DLS), pH titration, and pyrene fluorescence methods, which indicated that it could form micelles and exhibit pH responsibility. Moreover, the copolymer was nontoxic and had good biocompatibility according to the results by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay.
研究领域:
高分子化学
·
生物材料
·
药物递送
·
纳米技术
·
响应性材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）