JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Xiuhong Li,Shuailong Zhang,Jiangzhou Li,Xinyu Hu,Jinjiao Zhang,Qiong Wei,Chupeng Zhang,Daode Zhang,Yong Liu
Various electrospun fibrous membranes have been addressed for oil/water separation owing to their advantages of high specific surface ratio, lightweight, and high porosity. However, they are commonly obtained by solution electrospinning of non-green raw materials, which could cause serious environmental issues. To realize effective oil/water separation, the optimal processing parameters for melt electrospun polylactic acid (PLA) were determined through orthogonal experiments. Subsequently, PLA fibrous films with cellulose nanofiber (CNF) or sodium chloride (NaCl) for oil/water separation were produced via melt electrospinning. The effects of incorporating CNF or NaCl on the physiochemical properties of melt electrospun PLA fibrous membranes were investigated. In contrast to the pure PLA membranes, the obtained PLA/CNF and PLA/NaCl composite membranes exhibit a finer average fiber diameter and an increased porosity. Also, the oil absorption characteristics and oil/water separation abilities of these fibrous membranes were experimentally studied. In contrast to the 84.55% oil/water separation efficiency of melt-electrospun PLA fibrous membranes, PLA/CNF exhibits the highest oil/water separation efficiency at 93.54%, whereas PLA/NaCl achieves a maximum efficiency of 90.29%. These findings show the applicability of the eco-friendly PLA-based melt electrospun fibrous membrane in the treatment of oily wastewater.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 45
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IF 1.768
Xiaoyu Sun,Junping Zhang,Chengxian Yin,Juantao Zhang,Jiao Han
Scale deposition, which severely damages oil exploration, is a difficulty encountered in oil fields. Scale inhibitors are widely used for controlling scales. Poly(aspartic acid) (PASP) is attracting more and more attention with increasing environmental concern and discharge limitations. However, PASP's poor inhibition in a high-temperature environment markedly limits its wide use. Thus, poly(aspartic acid)–tryptophan grafted copolymer (PASPTR) was synthesized to improve the inhibition efficiency of PASP. The results show that the reactant of PASPTR has a great effect on its inhibition performance. PASPTR was found to inhibit the precipitation of CaSO 4 close to 90% at concentrations as low as 0.4 mg/L at 50°C. The inhibition efficiency of PASPTR against CaCO 3 was close to 100% with the concentration of 2 mg/L at 50°C. Scanning electron microscopy and X-ray diffraction analyses, which showed the morphological and crystal structural changes of CaCO 3 and CaSO 4 precipitation, verified the excellent inhibition performance of PASPTR. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42739.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 45
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IF 1.768
Mengye Cao,Hualin Wang,Ruizhi Cai,Qing Ge,Suwei Jiang,Linfeng Zhai,Shaotong Jiang
This work aimed to develop a novel epoxy-modified tung oil waterborne insulation varnish with blocked hexamethylene diisocyanate as a curing agent. The Diels–Alder reaction between tung oil and maleic anhydride, and the ring-opening esterification reaction of epoxy resin were confirmed. The conversion rate of epoxy was explored as a function of reaction time and temperature. The effects of epoxy resin content on the thermal stability, water absorption and insulation properties (insulation strength, volume resistivity, and surface resistivity) of films were investigated, and the resistances of films to salted water were evaluated. The increase in epoxy resin contents could improve the thermal stability and insulation properties of films, and decreased the water adsorption of films, but when the epoxy resin content reached 30% and above, the water solubility of resin became poor. After being immersed in 3.5 wt % NaCl solution, the electrical insulation strength of films were lower than that in dry state, and decreased as the immersed time prolonged. In particular, the electrical insulation strength loss of films increased significantly for epoxy resin content at 15% and below. Furthermore, the increase of epoxy resin content could improve the hardness and adhesion of films, but the flexibility of films became worse. On the basis of experimental, the epoxy resin content at 25% was appropriate to prepare waterborne epoxy-modified tung oil resin. The resulting varnish may have potential as an immersing insulation varnish for the spindle of electric motor. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42755.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 44
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IF 1.768
Li-Feng Fang,Ming-Yong Zhou,Na-Chuan Wang,Bao-Ku Zhu,Li-Ping Zhu
To improve the antifouling property of poly(vinyl chloride) (PVC) membranes, a series of poly(methacrylic acid) grafted PVC copolymers (PVC -g- PMAA) with different grafting degree were synthesized via one-step atom transfer radical polymerization process utilizing the labile chlorines on PVC backbones followed by one-step hydrolysis reaction. PVC/PVC -g- PMAA blend membranes with different grafting degree and copolymer content were prepared by nonsolvent induced phase separation method. The surface chemical composition, surface charge, membrane structures, wettability, permeability, separation performances and the fouling resistance of blend membranes were carefully investigated. The results indicated that the PMAA chains were segregated towards the surface and the membranes were endowed with negative charge. The hydrophilicity and permeability of the blend membranes were obviously improved. Furthermore, the antifouling ability especially at neutral or alkaline environments was also significantly increased. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42745.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 45
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IF 1.768
Hang Xu,Haicun Yang,Sheng Xue,Ji Pan,Qingting Ni,Fanghong Gong
Hybrid nanocomposites consisting of polydimethylaminoethyl methacrylate (PDMAEMA) and attapulgite (ATP) were prepared by using a surface thiol-Ce (IV) redox initiation system via graft from approach. Initially, ATP was chemically modified with γ-mercaptopropyltrimethoxysilane (MTS) to anchor thiol groups on the surface (ATP-MTS). Subsequently, surface-initiated polymerization of dimethylaminoethyl methacrylate was performed by using ATP-MTS and cerium (IV) ammonium nitrate (CAN) in aqueous nitric acid (HNO 3 ) to afford hybrid particles (ATP-g-PDMAEMA). Evidence of grafting of PDMAEMA was confirmed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Thermogravimetric Analysis (TGA). The crystal structure of PDMAEMA grafted ATP was characterized by X-ray diffraction (XRD) analysis. Morphology of ATP-g-PDMAEMA was observed by transmission electron microscopy (TEM). The effects of concentration of Ce (IV), HNO 3 , and reaction temperature were examined by determining the percentage of grafting (PG). With other condition kept constant, the optimum conditions were obtained as follows: the reaction temperature was 50°C, Ce (IV) and HNO 3 concentrations were 12.5 mmol/L and 1 mol/L, respectively, when 0.2 g of ATP-MTS, 1 mL of DMAEMA, and 4 mL of aqueous solution were used. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42762.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 41
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IF 1.768
Xiaolin Man,Ronglan Wu,Henghua Lv,Wei Wang
We report a study on the synthesis of anatase titania (TiO 2 ) particles with the sol–gel method at room temperature. We immobilized the particles on a grafted-cellulose intercalated montmorillonite (MMT). This nanocomposite, cellulose- g -poly(4-vinyl pyridine)/MMT/TiO 2 , could be applied in the photocatalytic degradation of organic pollutants efficiently because of the addition of a sorbent, the grafted cellulose. The synthesized nanocomposite was characterized with Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Methyl orange was used as a model molecule to study photocatalytic degradation. The nanocomposite exhibited a better photocatalytic activity than in the absence of the grafted cellulose. The kinetics of the photocatalytic degradation could be described by pseudo-first-order rate law. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42627.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
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IF 1.768
Zhengyan Tan,Hong Peng,Hongfang Liu,Linling Wang,Jing Chen,Xiaohua Lu
A novel magnetic adsorbent (EDTA /chitosan/ PMMS) was facilely prepared by reacting chitosan with EDTA anhydride in presence of PEI - coated magnetic microspheres. The as-synthesized EDTA/ chitosan /PMMS was characterized by XRD, SEM, TGA, FT-IR , and VSM, and then employed in removal of heavy metals of Pb(II) from aqueous solution. The results of the batch adsorption experiments revealed that the adsorbents had extremely high uptake capacities for Pb(II) in the pH range of 2 to 5.5, and the adsorption kinetics for EDTA/ chitosan /PMMS was consistent with the pseudo – second - order kinetic model. Moreover, its equilibrium data were fitted with the Langmuir isothermal model well, which indicated that the adsorption mechanism was a homogeneous monolayer chemisorptions process. The maximum adsorption capacity of EDTA/ chitosan /PMMS for Pb(II) was found to be 210 mg g − 1 at pH 4 (30 ° C), and further reuse experiments results suggested that EDTA /chitosan/ PMMS could be a potential recyclable magnetic adsorbent in the practical wastewater treatment. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42384.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
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IF 1.768
Li-chao Liu,Mang Lu,Zhao-Hui Hou,Guo-Xiang Wang,Chang-An Yang,En-Xiang Liang,Hu Wu,Xian-Lei Li,Yi-Xue Xu
Photo-induced atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was achieved in poly(ethylene glycol)-400 with nanosized α-Fe 2 O 3 as photoinitiator. Well-defined poly(methyl methacrylate) (PMMA) was synthesized in conjunction with ethyl 2-bromoisobutyrate (EBiB) as ATRP initiator and FeCl 3 ·6H 2 O/Triphenylphosphine (PPh 3 ) as complex catalyst. The photo-induced polymerization of MMA proceeded in a controlled/living fashion. The polymerization followed first-order kinetics. The obtained PMMA had moderately controlled number-average molecular weights in accordance with the theoretical number-average molecular weights, as well as narrow molecular weight distributions ( M w / M n ). In addition, the polymerization could be well controlled by periodic light-on–off processes. The resulting PMMA was characterized by 1 H nuclear magnetic resonance and gel permeation chromatography. The brominated PMMA was used further as macroinitiator in the chain-extension with MMA to verify the living nature of photo-induced ATRP of MMA. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42389.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
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IF 1.768
Chao Liu,Hanguo Xiong,Xing Chen,Shun Lin,Yanhua Tu
The purpose of this article is to investigate the effects of nano-tianium dioxide (nano-TiO 2 ) on the high-amylose starch/polyvingl alcohol (PVA) blend films prepared by a solution casting method. The results show that at the concentration of 0.6% of nano-TiO 2 , the film demonstrated the best tensile strength at 9.53 MPa, and the elongation at break was noted as 49.50%. The optical transmittance of the film was decreased and the water resistance was improved with further increase of the concentration of nano-TiO 2 . Using the techniques of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and field-emission scanning electron microscopy (SEM), the molecular and the crystal structures of the films were characterized. The results indicate that the miscibility and compatibility between high-amylose starch and PVA were increased with the addition of nano-TiO 2 into the films due to the formation of hydrogen and C O Ti bonds. The antimicrobial activities of the blend films were also explored. The results show that there were inhibitory zones around the circular film disc, which is attributable to the addition of nano-TiO 2 . © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42339.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
·
IF 1.768
Xiaoxia Wang,Beili Pang,Qianqian Zhu,Jianhua Yu,Hongzhou Dong,Lifeng Dong
Silver nanowires and graphene were used to form networks within acrylic resin to improve its toughness and conductivity through silane coupling agent. Meanwhile, acrylic resin was favorable to the adhesion of graphene to glass substrates and the connection among graphene sheets to form films. Experimental results indicate that after annealing at 400°C, sheet resistances of graphene-silver nanowire films were lower than those graphene films without silver nanowires. The findings in this study provide helpful information on the fabrication of graphene-based electronic devices. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42387.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 32
·
IF 1.768
Mei-Yan Yang,Lei Tan,Hai-Xia Wu,Chuan-Jun Liu,Ren-Xi Zhuo
In this article, a temperature- and pH-responsive delivery system based on block-copolymer-capped mesoporous silica nanoparticles (MSNs) is presented. A poly[2-(diethylamino)ethyl methacrylate)] (PDEAEMA)- b -poly( N -isopropyl acrylamide) (PNIPAM) shell on MSNs was obtained through the surface-initiated atom transfer radical polymerization. The block copolymer PDEAEMA- b -PNIPAM showed both temperature- and pH-responsive properties. The release of the loaded model molecules from PDEAEMA- b -PNIPAM-coated MSNs could be controlled by changes in the temperature or pH value of the medium. The as-desired drug-delivery carrier may be applied to biological systems in the future. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42395.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2015
·Vol. 132
·期 31
·
IF 1.768
Xiongfa Yang,Cheng Cao,Zhonghong Chen,Jia Liu,Alan R. Bassindale,Guoqiao Lai
Combination of the organic–inorganic hybrid such as silsesquioxane with ε-caprolactone will lead to materials expected to be environmentally friendly and applicable to biomedical usages. A ladder-like poly(phenyl silsesquioxane) based hybrid star-shaped copolymer of ε-caprolactone was prepared by ring opening polymerization of ε-caprolactone catalyzed by Sn(Oct) 2 with hydroxyl terminated ladder-like poly(phenyl silsesquioxane) as initiator. The copolymers were characterized by proton nuclear magnetic resonance ( 1 H-NMR), silicon nuclear magnetic resonance ( 29 Si-NMR), Fourier-transform infrared spectrometer (FT-IR), size exclusion chromatography (SEC), thermo gravimetric analysis (TGA), and differential scanning calorimetry (DSC) in detail. Furthermore, the enzymatic degradation property of the copolymers was also investigated. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42335.
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高影响因子
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