JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 21
·47482
·
IF 2.188
Dandan Bao,Yuntao Xie,Shenglin Ma,Zhibing Wu,Ji-Gang Piao
Lignin is considered one of the main biorenewable polymers from natural resources. Each year, a large amount of lignin is generated as a waste byproduct of the pulping process in the paper industry. However, it is seldom treated as a value-added material because of its undefined structure, the diverse methods of isolation and processing, and the origin of the material; these greatly hinder its application. Therefore, it is of great significance to explore new potential applications of this readily available yet underappreciated natural product. In this study, we developed a preparation method of lignin-based microstructures or nanostructures via self-assembly. We created various self-assembled nanostructures, including nanocubes, nanorods, nano-octahedrons, nanobranches, and other morphologies, by choosing different types of simple inorganic acids at various pHs. Some of these nanostructures have never been reported. These structures were fully characterized with scanning electron microscopy, ultraviolet–visible spectroscopy, and dynamic light scattering. All of them were uniform and stable. They displayed little or no cytotoxicity to cells in vitro at concentrations up to 1024 μg/mL. We hope the results of this study provide some insight for the future development of new applications of lignin-based materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47482.
研究领域:
材料科学
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纳米技术
·
生物材料
·
可持续化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 133
·期 16
·
IF 1.768
Yu Sun,Junhui Zhou,Qiang Cheng,Daoshu Lin,Qian Jiang,Anjie Dong,Zicai Liang,Liandong Deng
Graphene oxide (GO)-based nanohybrids were designed for small interfering RNA (siRNA) delivery for their high water dispensability, good biocompatibility, easily tunable surface functionalization, and particular optical properties. In this study, novel nanohybrids based on GO were fabricated. Methoxypoly(ethylene glycol) (mPEG) was covalently conjugated to GO via amide bonds. Then, poly(2-dimethyl aminoethyl methacrylate) (PDMAEMA), which was synthesized via reversible addition–fragmentation chain transfer polymerization (RAFT) with 2-(dodecyl thiocarbonothioyl thio)-2-methyl propionic acid (DTM) as the RAFT agent, was attached onto GO via physical interaction between DTM and GO. Compared with Lipofectamine 2000, the novel mPEG–GO/PDMAEMA nanohybrids showed comparable gene transfection efficiency and a low cytotoxicity. Moreover, the mPEG–GO/PDMAEMA nanohybrids showed enhanced optical properties compared to the original GO because of the presence of mPEG and PDMAEMA. Our work encouraged further exploration of the novel nanovector for combined photothermal and siRNA delivery. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43303.
研究领域:
纳米技术
·
生物医学工程
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材料科学
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分子生物学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 40
·46723
·
IF 1.901
Wan Xu,Bin Liu,Xiaobo Cai,Mohan Zhang,Xing-Hong Zhang,Peilin Yu
Polyurethane (PU) is widely used in biomedical applications owing to its excellent physical and chemical properties. As an isocyanate-free PU material, fluorescent poly(hydroxyurethane) (FPHU) is synthesized from the addition of the cyclic carbonates with amines rather than the toxic isocyanate with diols, which reduces the possible injury to the human due to trace amounts of the isocyanate residues. Herein, we report the biocompatibility of a FPHU that can be synthesized from carbon dioxide, bisepoxides, and diamine in tandem. Of unique, FPHU exhibits a strong blue fluorescence and is selectively sensitive to Fe 3+ with a detection limit of 4.56 μ M . The overall results of the methylthiazolyldiphenyl-tetrazolium, cytokine release, and hemolysis assays for FPHU indicates that FPHU has much lower cytotoxicity and immunotoxicity compared with the traditional isocyanate PU, as well as a good blood compatibility with less than 5% hemolysis rate. Therefore, FPHU presents as a kind of safer PU and can be prospectively applied in medical materials.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 35
·e52859
·
IF 3.057
Lu Han,Lingxiao Li,Rongsheng Gao,Xueyan Liu,Chengyou Kan
The relationships between morphology and properties are important for functional polymer particles. In this work, stable core/shell PMMA/P(MMA- co -PDSECAE) (C/S) latexes with uniform particle size are first prepared through semi-continuous soap-free seeded emulsion polymerization of methyl methacrylate (MMA) and 2-(((2-[pyridin-2-yldisulfanyl]ethoxy)carbonyl)amino) ethyl acrylate (PDSECAE), and thiol-functionalized core/shell PMMA/P(MMA- co -PDSECAE)-SH (C/S-SH) submicron particles (SPs) are then obtained by reduction of disulfide bonds with dithiothreitol (DTT). Adsorption behaviors of heavy metal ions on the SPs are investigated. Results show that, the C/S-SH SPs, with more thiol groups distributed closer to the surface, have nearly twice the Pb 2+ adsorption capacity of the homogeneous SPs prepared via batch emulsion polymerization. The C/S-SH SPs show strong selective adsorption capacities toward Hg 2+ and Pb 2+ , and maximum adsorption capacities reach 0.477 and 0.303 mmol g −1 , respectively. Due to their high selectivity, adsorption capacity, specific surface area and simple preparation process, these core/shell SPs have promising applications in water treatment.
研究领域:
材料科学
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环境科学
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高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 137
·期 38
·49126
·
IF 2.52
Xiao Wei,Liang Lv,Zhendong Zhang,Weisheng Guan
A facile and effective method was proposed to prepare the molecularly imprinted fluorescence sensor with carbon quantum dots, which were modified vinyl groups by acrylic acid on the surface. The obtained fluorescence composite material was investigated by transmission electron microscope and Fourier transform infrared spectra. After the experimental conditions were optimized, a linear range of 1.0–60 μmol L −1 was obtained and the detection limit was 0.17 μmol L −1 . The novel fluorescence sensor can be successfully used to detect tetracycline in real samples. This study provides a convenient strategy for selective recognition and rapid detection of tetracycline in the complex environment.
研究领域:
分析化学
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材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 18
·52059
·
IF 3.125
Xi Hou,Liwen Sun,Wei Wei,Darlene K. Taylor,Shengpei Su,Haibin Yu
Thermoplastic polyurethane (TPU) has become the focus of attention in the green and sustainable materials field because of its superior processability and recyclability. In this paper, a series of polylactic acid (PLA) and polycaprolactone (PCL)-based TPUs were successfully prepared by selecting PLA glycol, PCL glycol, isophorone diisocyanate (IPDI) and 1,4-butanediol (BDO) through a one-step polymerization method. The properties of the PLA and PCL-based TPUs are comprehensively characterized by Fourier transform infrared spectroscopy, 1 H NMR spectra, gel permeation chromatography, differential scanning calorimetry, thermalgravimetric analyzer, tensile test, dynamic mechanical analysis, scanning electron microscope, and so forth. The effect of hard segments content and PLA glycol molecular weight on the properties of PLA and PCL-based TPUs was systematically studied. Notably, their performance shows a certain degree of regularity and can be controlled by adjusting the hard segments content or the molecular weight of the PLA glycol. The prepared PLA and PCL-based TPUs have a tensile strength of 24.71 MPa, excellent thermal stability and out-standing damping performance. Its tan δ max of 1.40 and an effective damping temperature range of 50°C also make it a green damping material with great potential.
研究领域:
材料科学
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绿色化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 138
·期 9
·49913
·
IF 2.52
Mengwei Dai,Pan Song,Yong Zhang
A castor oil (CO) was modified via thiol-ene click chemistry reaction between CO and 3-mercaptopropyl trimethoxysilane, with the conversion of CC bonds of CO over 99% based on 1 HNMR spectra. The obtained modified castor oil (MCO) was used as a biobased polyol to prepare waterborne polyurethane (WPU) dispersions. The modification of CO exhibited a great effect on the properties of WPU dispersions and coatings, and an obvious change is the improvement of the water resistance of WPU coatings. WPU dispersions with MCO had good storage stability. A WPU coating with 7% MCO had high surface hydrophobicity, and its water absorption was as low as 3.2%. Conductive carbon black filled WPU coatings with MCO were cured by efficient UV radiation, and their conductive percolation threshold could decrease to 0.76%, which could be attributed to the well filler dispersion and strong filler-polymer interaction. The WPU dispersions are ecofriendly, and can be used to produce biobased WPU coatings with a great application potential in antistatic coating fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 8
·49870
·
IF 2.52
Shengnan Li,Xiaojuan Zhao,Yu Zhang,Xin Yang,Ran Yu,Ying Zhang,Kuilin Deng,Wei Huang
The cage-ladder-structure phosphorus-containing amino-functionalized polyhedral oligomeric silsesquinoxanes (CLNH 2 -POSS) have been synthesized through a facile catalyst-free hydrolytic condensation of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide-vinyltrimethoxysilane (DOPO-VTMS) with 3-aminopropyl trimethoxysilane (KH540). The successful preparation of CLNH 2 -POSS has been proven by the characterization of Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy ( 1 H-NMR, 29 Si-NMR), matrix-assisted laser desorption ionization time of flight (MALDI-TOF), and X-ray diffraction (XRD). Then flame retardant (FR) epoxy resins (EPs) were prepared by the addition of different content of CLNH 2 -POSS into EPs with thermal curing technology. The CLNH 2 -POSS showed good solubility in EP matrix. The well-dispersed CLNH 2 -POSS contributed to thermal, mechanical, and FR properties of EP. Dynamic scanning calorimetry nonisothermal curing scans showed that CLNH 2 -POSS had accelerating effect on the curing of EP. With the addition of only 3 wt% CLNH 2 -POSS (0.30% phosphorus loading), the limiting oxygen index value of the EP composite increased from 25.5 of pure EP to 31.8, and vertical burning (UL-94) V-0 ratings was achieved. In addition, the EP composites showed improved thermal and mechanical properties. The investigations on char residue and pyrolysis volatiles of cured EP further revealed that CLNH 2 -POSS exerted FR effects in condensed and gas phase simultaneously.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 39
·51010
·
IF 3.125
Yue Yin,Jian Yang,Linghui Meng
Poly(butylene succinate) (PBS) refers to a high-performance biodegradable polymer employed to substitute petroleum polymers that cause environmental issues. However, PBS exhibits the defect of flowing above the melting point and rapid dripping for its poor melt strength. Accordingly, this study proposed a novel method to fabricate PBS vitrimer by exploiting reactive extrusion technology to mix diepoxide with PBS and then by employing zinc acetate as a catalyst to crosslink the PBS. Therefore, after the reaction extrusion blending, the blend still has a lower viscosity and high processing performance; in the subsequent curing process, the polymer undergoes a transesterification reaction and the viscosity increases. Via transesterification to form a cross-linked network, the storage modulus, and loss modulus of PBS vitrimer at 140°C reach 55,800% and 3500% of pure PBS, respectively. At this time, the crystallinity of PBS vitrimer is still as high as 56.9% (The crystallinity of pure PBS is 47.4%). And the shape stability of PBS at high temperatures was significantly improved. Moreover, PBS vitrimer could still be reshaped after the cross-linking process. This study proposed a facile method to produce PBS materials exhibiting high thermal shape stability.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 29
·50685
·
IF 3.125
Ngoc Minh Ho,Thuy Chinh Nguyen,Thi Thanh Van Tran,Tien Dung Nguyen,Hoang Thai
The epoxy/silica nanocomposites containing a wide range of isopropyltri[di(octyl) phosphate] titanate coupling agent (KR-12) modified nanosilica (m-nanosilica) loading (0–7 wt%) cured with tetrabutyl titanate hardener were prepared. Their morphology, thermal stability, thermal expansion, and mechanical properties including hardness, abrasion resistance were investigated. The wetting ability of epoxy-nanosilica systems on glass surface was assessed based on static contact angle. The obtained results showed that the contact angle of the nanocomposites containing m-nanosilica is slightly changed as compared to the contact angle of pure epoxy resin and lower than that of the nanocomposite containing unmodified nanosilica. The data of dynamic mechanical analysis of the nanocomposites using different nanosilica content indicated that the presence of m-nanosilica lowered the recovery energy of the nanocomposites to 41.62% as compared to neat epoxy. The limiting oxygen index (LOI) of the nanocomposites confirmed that the m-nanosilica increased the flame retardance of epoxy matrix. When using 7 wt% of m-nanosilca, the LOI value of the nanocomposite was 27.4 while this index of neat epoxy was 21.6. The scanning electron microscopic images of residual char combustion of the nanocompsites indicated a formation of nanosilica layer contributed to restrain combustion of the material.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 137
·期 6
·48358
·
IF 2.188
Long Chen,Xinhua Zhou,Guanquan Lin,Huayao Chen,Li Hao,Hongjun Zhou
In order to improve the utilization rate of avermectin (AVM), a complex was prepared by electrostatic self-assembly using isolated soy protein (ISP) and carboxymethyl chitosan (CMCS) for loading AVM to obtain ISP/CMCS@AVM microspheres. The encapsulation efficiency (EE), sustained release property, ultraviolet (UV) protective ability, and toxicity of the microspheres were evaluated, and the release kinetics of AVM from the microsphere at different pHs were investigated. The results demonstrated that the average particle size of ISP/CMCS@AVM was 283.95 nm, and the EE reached 88.42% for AVM after denaturation. After 70 h of exposure to UV light, the residual rate of AVM in ISP/CMCS@AVM was 78.12%, which was significantly higher than 35.18% in the AVM emulsion. Moreover, the formulation imparted pH sensitivity and sustained-release property to AVM and was consistent with the Korsmeyer–Peppas model, controlled by Fick diffusion. Finally, the insecticidal toxicity of ISP/CMCS@AVM did not differ significantly from that of unmodified AVM. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48358.
研究领域:
材料科学
·
农药化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 137
·期 2
·47298
·
IF 1.901
Wei Hou,Yifan Fu,Cen Zeng,Na Liu,Cuiyu Yin
In this study, the nanocomposites are prepared which used polyamide 6 (PA6) composite as matrix, melamine cyanurate (MCA) as fire retardant and attapulgite (AT) as synergistic agent. The mathematical model between MCA content, AT content, and limited oxygen index (LOI) is established by multiple linear regression fitting. The polymer materials are characterized using Fourier transform infrared spectroscopy, X-ray diffraction, Thermogravimetric Analysis, and scanning electron microscopy. Through response surface methodology, the important variables (polymerization time, the content of MCA, and the content of AT) affecting the mechanical strength of composites are modeled. Results demonstrate that when the t is 0.6 h, the AT content is 6.2%, and the MCA content is 11.5%, the mechanical properties of the PA6/MCA/AT composite are up to 44.81 MPa, and the sample passes the UL-94 V-0 flammability rating, and the LOI reaches 27.9%. Therefore, polymers with highly effective flame retardancy and optimal mechanical properties are prepared. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 47298.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）