POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 11
·4223-4232
·
IF 3.665
Yubin Li,Zhijian Yang,Xu Zhao,Jianhu Zhang,Ling Ding,Liping Pan,Congmei Lin,Xue Zheng
A novel thermally mendable polyurethane binder for energetic composites was designed and prepared via the Diels-Alder (DA) cycloaddition reaction between a furan functionalized polycaprolactone (PCL) prepolymer and a bismaleimide compound. The structures and properties of synthesized PCL-DA-PU were fully characterized via Proton Nuclear Magnetic Resonance ( 1 H-NMR) and Fourier Transform Infrared spectroscopy (FT-IR), Gel Permeation Chromatography (GPC), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC) measurements. As-prepared material showed good self-healing ability of scratches by virtue of combining the shape recovery effect of PCL segments favoring scratch closure with the re-crosslinking of the cleaved DA bonds, which was evidenced by optical microscopy and tensile analysis. A scratch healing efficiency determined by tensile tests of about 89% was achieved. Moreover, with the contribution of DA bonds in PCL-DA-PU binder, the microcracks and other damages in the TATB based energetic composites were almost mended and the mechanical strength can recovery above 78%.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2015
·Vol. 27
·期 2
·169-177
·
IF 1.757
Jie Liu,Ru Cheng,Jianping Deng,Youping Wu
Chiral, pH-responsive hydrogels are constructed by poly(ethylene glycol) diacrylate/ α -cyclodextrin (PEGDA/ α -CD) inclusion complex and L- N -acryloyl-alanine or D- N -acryloyl-alanine (L-NAA or D-NAA) by an effective free radical polymerization approach. PEGDA containing two C=C end groups was used simultaneously to introduce α -CD units in the resulting hydrogels and to serve as a cross-linking agent, by which forming the designed hydrogels in quantitative yield. Hydrophilic α -CD moieties acted as pore-forming agent, while the L(D)-NAA-based polymer chains bearing –COOH groups enabled the hydrogels to display remarkable swelling–deswelling behavior in response to pH variation. The chiral NAA monomer-derived polymer chains rendered the hydrogels with intriguing optical activity, according to circular dichroism spectra. Scanning electron microscopy revealed the uniformly porous microstructures of hydrogels. More remarkably, the L-NAA-based hydrogels preferentially adsorbed trans -4-hydroxy- d -proline and preferentially released trans -4-hydroxy- l -proline, while D-NAA-based hydrogels provided opposite results. The hydrogels also demonstrated remarkable enantioselective release ability towards chiral drug ibuprofen. Copyright © 2015 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 6
·1684-1696
·
IF 2.137
Xiaoyu Chen,Xiaomeng Wu,Zhongyong Fan,Qinghua Zhao,Qing Liu
The macroinitiator of poly(1,3-trimethylene carbonate) (PTMC) with number-average molecular weight ( ) of 9.6 × 10 3 g mol −1 was synthesized by ring-opening polymerization at 120°C. Then, the novel terpolymer P(TMC- b -( L LA- ran -GA)) consisting of PTMC homopolymer segment attached with various monomer molar ratios of L -lactide ( L LA) and glycolide (GA) random copolymerization block was prepared with about 5.0 × 10 4 g mol −1 by ring-opening polymerization in bulk at 140°C. The tailored molecular structures of P(TMC- b -( L LA- ran -GA)) were characterized by 1 H nuclear magnetic resonance, 13 C NMR, FTIR, and gel permeation chromatography, and chain microstructure analysis was performed in detail with 13 C NMR spectroscopy. The effect of GA units on the thermal and crystallization behaviors, mechanical properties, as well as biodegradability of terpolymers was investigated by differential scanning calorimetry, wide-angle X-ray diffraction, stress-strain measurements, and in vitro tests in comparison with corresponding poly(trimethylene carbonate- block - L -lactide) copolymer P(TMC- b - L LA). The results show that amorphous PTMC segments have a significant effect on condensed state behavior of the terpolymers, and the incorporation of GA units strongly decreases the crystallinity and crystallization ability of L LA segment within terpolymers because of more random L LA-GA sequence and shorter average L LA block length. Meanwhile, the toughness of materials is greatly improved, and in vitro degradation is also accelerated. Peripheral vascular stents were 3D printed for the first time and met the requirements for application. The results show totally biodegradable terpolymers with unique molecular structure, and modifiable properties are promising new biomaterials with advanced performance for biomedical application.
研究领域:
生物材料学
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高分子化学
·
医学工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 5
·1655-1664
·
IF 3.348
Wei Dong,Shian Zhou,Fuping Qian,Qing Li,Gang Tang,Tengfei Xiang,Hong-ming Long,Tiejun Chun,Jinli Lu,Yunlong Han
A hierarchical structure similar to “lotus leaf surface” has attracted widespread attention due to its excellent hydrophobic properties. Herein, using low-temperature sol–gel method prepared superhydrophobic SiO 2 particles with biomimetic lotus leaf micro/nanoscale hierarchical structure (BRHS), which were formed in situ on the surface of polyethylene terephthalate (PET) fiber, and endowing PET-based composite filter media (P-Filter) superhydrophobic property. After different TEOS@MTES@ KH550 (TMK) modification treatments, SiO 2 particles were wrapped on the P-Filter, and the microscopic pore structure was changed significantly. When the mass ratio of TEOS/MTES (TM) reached 4/2, KH550 modified SiO 2 nanoparticles displayed the widest particle size distribution. In this case, the PET (TMK@PET-4) fibers exhibited rough morphology of BRHS, the contact angle (WCA) reached 160.9 ± 2.8°, and the shedding angle (WSA) was 5.9 ± 2.5°, which reaching a superhydrophobic state. Also, the TMK@PET-4 filter material demonstrated best comprehensive filtration performance for PM 0.3 ( η : 99.12%, Δ P : 58 Pa, Q F : 0.0816), 36.96% higher than the original PET filter, and had excellent mechanical stability and self-cleaning properties. Therefore, the presented simple method has a guiding significance in producing superhydrophobic P-Filter, a potential value for the research and development of bag-type dust removal materials in high-humidity environments.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 4
·1222-1232
·
IF 3.665
Bei Liu,Kai Jin,Jie Tao,Hao Wang,Dan He,Huaguan Li
In this study, we proposed a machine learning (ML) method to optimize the comprehensive performance of shape memory epoxy polymers (SMEPs) based on experimental data as samples. Firstly, a series of SMEPs specimens were prepared, and their properties were evaluated respectively by testing four indexes including the glass transition temperature ( T g ), bending strength, strain fixation rate ( R f ), and strain recovery rate ( R r ). Subsequently, ML used these experimental data as samples for feature learning to investigate the influence of each component on these properties. The results indicated that methyltetrahydrophthalic anhydride was more favorable to T g and bending strength than methylhexahydrophthalic anhydride (MHHPA) as a curing agent. However, a certain amount of MHHPA must be included in the system to guarantee a higher R f and R r . Moreover, the right amount of bisphenol A cyanate ester in the system improved the comprehensive properties of SMEPs, especially the shape memory effect. Finally, a SMEPs system with superior properties was acquired through the optimization of four indexes of T g , bending strength, R f and R r . Therefore, this study shows that ML methods can also be used to investigate SMEPs that require more specific excellent performance.
研究领域:
材料科学
·
人工智能
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 3
·407-414
·
IF 2.162
Hongxin Wang,Baijun Liu,Mingyao Zhang,Shuai Du,Gaocheng Wu,Yiwei Hu,Jinhui Zhang,Xiangchi Liu
The increasing demand for monodispersed cross-linked polymers in high-quality applications requires continuous improvement in their preparation process. In this study, an appropriate amount of a chain transfer agent was added to a traditional cross-linking system, resulting in the preparation by one-step dispersion polymerization of cross-linked polystyrene (PS) microspheres with a particle size of 3.867 μm and a diameter coefficient of variation of 0.011. The particles were characterized using scanning electron microscopy (SEM) and an Ubbelohde viscometer. The results show that the tertiary dodecyl mercaptan (TDDM) chain transfer during nucleation increases the oligomer concentration, promotes the aggregation of the oligomers, increases the primary particle size, and reduces the cross-linking effect. This controls the volume of cross-linked chains in the primary particles, thus avoiding the problem of poor dispersion of the polymer microspheres due to the introduction of divinylbenzene (DVB). This study produces a preparation method for cross-linked microspheres.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 31
·期 3
·602-615
·
IF 2.162
Jiaxin Li,Xuejun Lai,Hongqiang Li,Xingrong Zeng,Yuncong Liu,Yunsheng Zeng,Changcheng Jiang
The combination of catalyzing carbonization and free-radical quenching mechanism is proposed to be a promising strategy for the preparation of high-efficiency flame-retardant polypropylene (PP). Herein, a novel functionalized zirconium phosphate (RQZrP) nanosheet with free-radical quenching capability was fabricated by decorating macromolecular N-alkoxy hindered amine (MNOR) onto the surface of ZrP. It was combined with an intumescent flame retardant (IFR) to flame-retard PP. The results showed that there was a good synergism between RQZrP and IFR, which effectively improved the fire safety of PP. When the content of RQZrP was 2 wt% and IFR was 23 wt%, the limiting oxygen index (LOI) of PP increased from 19.0% to 33.0%, and it achieved a UL-94 V-0 rating. Meanwhile, the peak heat release rate (PHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO 2 P) were significantly decreased. It revealed that nitroxyl radicals generated by RQZrP could capture alkyl radicals and peroxy radicals that produced during the degradation and combustion of PP. Meanwhile, RQZrP acted as a solid acid that catalyzed PP chains rapidly cross-linking to form char on its surface, and it also played as a supporting skeleton to enhance the strength and compactness of the char layer, thus effectively preventing the transmission of heat, oxygen, and combustible gases.
研究领域:
材料科学
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高分子化学
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燃烧与防火研究
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 12
·4120-4130
·
IF 3.348
Xue Meng,Da Zhang,Meng Wang,Ronghui Zhao,Pengfei Zhang,Jingyuan Zhao,Kuilin Deng
For the nontraditional aggregation-induced emission (AIE) active polymers, the heterocyclic structure on the macromolecular backbone and side chains play a crucial role in its fluorescence generation. In this paper, we facilely prepared a series of poly(β-lactam) derivatives (PLTM) by Staudinger polymerization. As expected, PLTMs with four-membered heterocycles along the main-chain shows a remarkable AIE performance with the fluorescence emission at 520 nm, while no fluorescence was observed for both β-lactam (repeating unit) and a model polymer for PLTM. The fluorescence properties of PLTMs greatly depend on the intramolecular aggregation of β-lactam structures, the size of the substituents, and appropriate length of CH 2 spacer. In addition, PLTMs can specifically detect Fe 3+ ions with a limit of detection (LOD) of 7.2 μM even in the presence of other 13 metal ions. Similar to the biological activity of β-lactam, AIE-active PLTMs shows a bactericidal effect on Staphylococcus aureus and Escherichia coli with the minimum inhibitory concentration of about 8 and 4 mg/mL. In brief, the preparation and versatility of PLTMs with β-lactam structure provide useful references for designing other nontraditional AIE-active polymers as well as for ion detection and antibacterial processes.
研究领域:
高分子化学
·
分析化学
·
生物化学
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 9
·3750-3758
·
IF 3.665
Si Chen,Changbo Xu,Meng Ma,Yanqin Shi,Huiwen He,Kaiyun Yuan,Ruqing Xu,Xu Wang
In this paper, a novel kind of PMMA copolymer, P(MMA- co -MAA- co -SPMA), with permanently antistatic, high toughness, and high transparent properties, was synthesized via radical copolymerization. Herein, we selected the appropriate compatibilizer α-methacrylic acid (MAA) and release agent (lauryldiethanolamine) through the calculation of solubility parameters for industrial mass production. What is more, the polymer's molecular weight was increased by improving the polymer's synthesis process. The structure and properties of the obtained copolymer were characterized. With 0.6 wt% of the 3-sulfopropyl methacrylate potassium salt (SPMA), the copolymer exhibits nearly unchanged transparency with neat PMMA, and its unnotched impact strength reaches 16 kJ/m 2 . The surface resistance of the copolymer could be reduced to 10 10 Ω, which could be considered as antistatic materials. Finally, the antistatic mechanism was analyzed. The main reason is that the hydrophilic group absorbs water to form a conductive layer on the surface, and 3-sulfopropyl methacrylate potassium salt (SPMA) is an ionic monomer that can form ion channels in water molecules, further accelerating the leakage of accumulated electrostatic charges and improving the antistatic properties of the copolymer. The method of selecting compatibilizers and release agents through solubility parameters provides more opportunities for the development of PMMA with excellent comprehensive performance.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 3
·1262-1271
·
IF 2.578
Qingzhen Zhu,Baogang Zhang,Yuandou Wang,Xinghua Liu,Weiwei Li,Feng Su,Suming Li
Poly( D , L -lactide-co-glycolide)-poly(ethylene glycol) (PLGA-PEG) diblock copolymers with different compositions were synthesized by ring-opening polymerization of D , L -lactide and glycolide, using monomethoxy PEG as macro-initiator. The resulting copolymers were characterized by nuclear magnetic resonance, gel permeation chromatography, and critical micelle concentration analyses. Self-assembly of the copolymers yielded aggregates of different architectures, including spherical micelles and a mixture of spherical and worm-like micelles with Y-junctions. The self-assembled architecture depends on both the hydrophilic/hydrophobic balance and the molar mass of copolymers. Valsartan, a widely used drug in the treatment of hypertension, was loaded in micelles using a co-solvent evaporation method. High drug-loading content was obtained for worm-like micelles. in vitro drug release was performed at 37°C in pH 7.4 phosphate-buffered saline. An initial burst release is detected in all cases, followed by slower release up to 9 days. The overall release rate is strongly dependent on the degradation of micelles. Copolymers with short PLGA blocks exhibit faster drug release due to faster degradation of micelles, and worm-like micelles present slower drug release as compared to spherical ones. Therefore, PLGA-PEG copolymer micelles with high drug-loading capacity, different architectures, and variable drug release rates could be most attractive for sustained delivery of valsartan.
研究领域:
药剂学
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生物材料
·
高分子化学
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 2
·492-504
·
IF 3.665
Zhongyang Yao,Qiming Cao,Chenyang Li,Weiguang Gong,Xin Meng
In this article, a β-cyclodextrin(CD)/cardanol (CA) inclusion complex (IC) was fabricated by co-precipitation method, which was used to guarantee excellent thermal oxidative stability and environmental-response antioxidation releasing property of PLA. The results showed that CA was successfully immobilized into β-CD with a stoichiometric ratio of 1:1, and the immobilization inhibited the migrant of CA from PLA during storage, resulting in the enhancement of antioxidant life of CA in PLA. Thus, PLA stabilized by IC (PLA/IC) maintained higher oxidation onset temperature (OOT) and molecular weight after long-term thermal oxidative aging. Moreover, CA releasing comparison from PLA/IC and PLA stabilized by CA (PLA/CA) in food stimulant suggested that PLA/IC released CA faster than PLA/CA when PLA contacted with food stimulants due to the solubilization of β-CD for CA, which would induce the quicker antioxidation of CA in food. In a word, IC can make PLA with longer anti-oxidative stability during storage and quicker environmental-response antioxidation releasing property during usage, showing strong potential as an active food-packaging materials.
研究领域:
材料科学
·
食品包装工程
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 9
·2845-2854
·
IF 3.348
Tongmou Geng,Fengqiang Wang,Xuechun Fang,Hongyu Xia
A nitrogen-rich porous inorganic–organic hybrid polymer, TMPS, was successfully synthesized by Friedel–Crafts arylation with anhydrous aluminum trichloride as a catalyst, which has good sensitivity to nitro-aromatic compounds. The material was systematically characterized by using FT-IR, solid-state 13 C NMR, elemental analysis, powder X-ray diffraction, solid-state UV–Vis, and so forth. The thermogravimetric analysis experiments confirmed that TMPS has very good thermal stability. Its Brunauer Emmett Teller specific surface area measured by nitrogen adsorption desorption experiment is 115 m 2 g −1 . Due to its excellent conjugated structure and nitrogen-rich features, TMPS exhibits a very high sensitivity and selectivity to 2,4-dinnitrophenol. Based on the data obtained from the fluorescence detection experiment, the K SV and limit of detection are 1.84 × 10 4 L mol −1 and 1.63 × 10 −11 mol L −1 , respectively. Therefore, TMPS can act as a fast and sensitive fluorescent sensor to detect DNP.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）