POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 2
·641-650
·
IF 2.578
Jiantang Jiang,Yifeng Shen,Deyou Yu,Minghua Wu,Lei Yang,Shaoqi Li
The printing of polyester (PET) fabrics using binders and disperse dyes is an environmentally less harmful technique due to the exclusion of water-intensive washing processes. Unfortunately, the conventional polyacrylate (PA) binders are inapplicable for this printing technique as the high PA-disperse dye compatibility restrains the migration of disperse dye molecules from binder films into PET fabrics. Herein, we demonstrate a rational design and synthesis of novel PA binders by copolymerizing fluorosilicone monomers with multi-vinyl groups for the sustainable printing of PET fabrics. The incorporated fluorosilicone functionalities significantly decrease the solubility parameter of PA, facilitating the dye molecules migration toward PET fabrics. Meanwhile, the crosslink structure formed via vinyl groups restrains the migration of polymer chains and thus allows for the anchor of F/Si segments, enabling the continuous migration of disperse dyes. As a result, both the utilization ratio of disperse dyes and the color yield and fastness of printed PET fabrics are substantially improved. Moreover, the washing-free printing process using the developed binder can reduce 73% of water consumption, 74% of energy input, and 100% of wastewater discharge over the traditional printing process. Our study may provide insights into rational design of binders for the sustainable printing of PET fabrics.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 3
·1176-1186
·
IF 2.578
Lichen Zhang,Deqi Yi,Jianwei Hao,Ming Gao
Wood has always maintained an important position in construction engineering and decoration due to its unique excellent characteristics, but its flammability has limited various application. In this study, phytic acid (PA) derived from plant seeds and uracil (U) derived from ribonucleic acid (RNA) were prepared as water solution, and natural wood just through physical infiltration in the water solution to obtain wood/PA/uracil (flame retardant [FR] wood), which was environmentally friendly, high strength and fire-resistant. The three-point bending test performance was basically unchanged, compressive strength was increased by 15.3%. The peak heat release rate, total heat release, smoke production rate, and total smoke production of FR wood were reduced up to 41%, 30%, 61%, 56%, respectively, compared with the natural wood. Limiting oxygen index value of FR wood can reach 31.8%, and UL-94 V-0 rating can be reached. These results suggested that wood/PA/uracil could be promising green construction applications.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 4
·1680-1689
·
IF 2.578
Zhaoshun Zhan,Li Wang,Yaolong Zhang,Shihan Weng,Menghan Sun,Lixin Li
After the incorporation of the polyaniline (PANI), polymethyl methacrylate (PMMA) composites with outstanding electrical conductivity had been widely used in sensors. However, the flame retardancy of PMMA composites seriously restrained its further application. Thus, phosphorus-containing polyaniline (FR-PANI) was successfully prepared and combined with PMMA. The flame retardancy, electrical conductivity, thermal stability, and fire behavior of the resultant PMMA/FR-PANI composites were systematically studied. When the loading amount of FR-PANI was controlled at 20 wt%, the PMMA matrix was endowed with dramatic flame retardancy, exhibiting a limiting oxygen index of 29.1% and a UL-94 V-0 rating in vertical burning tests. Meanwhile, the volume resistivity was also reduced up to 0.5 MΩ. The thermal stability of the PMMA/FR-PANI composites was enhanced by the formation of abundant char residue, which improved the fire behavior of the PMMA matrix. The effect of FR-PANI on the flame retardancy of the PMMA matrix was deduced on the basis of thermogravimetry-infrared, Fourier transform infrared, and scanning electron microscopic analyses. The phosphorus-containing functional groups in the FR-PANI molecular chain underwent thermal degradation in the condensed phase and promoted the formation of a char layer. The char layer, in turn, prevented heat transfer into the interior of the PMMA composites, serving as a barrier to the volatilization of flammable micromolecules. Therefore, FR-PANI is an important candidate to extend the range of applications of PMMA to include multifunctional intelligent sensors.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 3
·1135-1149
·
IF 2.578
Haisheng Feng,Lijun Qian,Lingang Lu
To meet the increasingly stringent requirements for the excellent fire safety, low addition, low cost, and good mechanical properties for polycarbonate (PC), a novel aromatic polyimide (API) charring agent was synthesized and used synergistically with hexaphenoxycyclotriphosphazene (HPCTP) to flame-retardant (FR) PC. The incorporated API and HPCTP improved FR performance and the fracture toughness of the PC, simultaneously. The 4H-2A passed the UL94 V-0 rating with a limited oxygen index of 32.5%. Moreover, the heat release rate of the PC was also suppressed significantly by the dense and strengthening carbon layer. The mechanism of synergistic charring effect of API and HPCTP were analyzed: In the initial and developing stages of combustion (below 450°C), the quenching effect and dilution effect of HPCTP played a major role in flame retardancy; and due to the barrier function of the highly graphitized char layer, the combustion process rapidly enters weakening stages (above 450°C) and finally extinguishes. Moreover, it was founded that API improved the antiimpact performance of PC matrix, which offsets the negative effect of HPCTP on the impact performance of PC matrix.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 4
·1604-1614
·
IF 2.578
Gang Zhang,Dongdong Song,Su Ma,Yanlin Wang,Xiaotian Xie,Yanmao Dong
Currently, the issue of improving the flame-retardant performance of unsaturated polyester resin (UPR) has drawn a lot of attention. In this study, methyl vinyl di (1-thio-2,6,7-trioxal-1-phosphabicyclo [2.2] octane-4-methoxy) silane (MVDOS) with P-N-Si-based cage unit was synthesized, and it was utilized as a reactive flame-retardant monomer to modify UPR. The UPR/MVDOS composites were prepared by introducing different ratios of MVDOS into UPR via the reaction of crosslink. The efficiency of the resulted composites was investigated by using the limiting oxygen index (LOI), vertical burning test, and cone calorimeter test. The results showed that the composites reached the V-0 rate without dripping, and the LOI value was 29.1% when the content of MVDOS was as low as 18 wt%. Cone calorimeter tests revealed the peak of heat release and CO production of UPR/MVDOS-18 were 238.2 KW/m 2 and 0.0167 g/s, which were respectively lower than the ones of neat UPR. The introduction of MVDOS also increased the stability of UPR composites. Furthermore, the scattering electron microscopy, laser Raman spectroscopy, and X-ray photoelectron spectroscopy studies revealed that the incorporation of MVDOS stimulated the UPR matrix to generate char layer with increased graphitization degree, which provided a good barrier to prevent heat and oxygen from being transferred and then protected the materials inside from further burning. This research provides a new way to obtain flame-retardant UPR composites with high performance.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 3
·1126-1134
·
IF 2.578
Xiangyun Mi,Xiuzhi Zhang,Mei Ding,Ming Zhang,Meishan Pei
Polycarboxylic acid dispersants (PCs) with comb-like molecular structure have become the focus of dispersants. However, there are many contradictions in the study of molecular structure of polycarboxylic acids. In this article, a series of PCs with different molecular structures were prepared from acrylic acid (AA) and methyl allyl alcohol polyoxyethylene ether (TPEG) by reversible addition fragmentation chain transfer (RAFT) polymerization. The structural characteristics of PCs were characterized by flourier transform infrared spectrometer (FT-IR), 1 H nuclear magnetic resonance (NMR) spectroscopy and gel permeation chromatography (GPC). The dispersion performance of PCs to cement was measured by the fluidity and adsorbing capacity. The results show that the dispersion performance and adsorbing capacity of PCs are significantly related to its structure. The adsorption and dispersion properties increase with the increase of carboxyl content and molecular weight. However, this phenomenon is limited to a certain range that the acid ether ratio in this range is no greater than 5:1, and the molecular weight is no greater than PC-4 ( Mw = 82 125, Mn = 63 889).
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 12
·3150-3160
·
IF 2.578
Yaowen Zhang,Zhiliang Zhang,Pengfei Guo,Fei Han,Chongqi Shou
In this work, a couple of network polyacrylates (NPA-HBPE-G2/G3/G4) were synthesized from the different generation hyperbranched polyester (HBPE) and acrylate monomers, and used to enhance the interfacial adhesion of asphalt with inorganic minerals. The molecular structure and respective performance of NPA-HBPE were characterized by FTIR, 1 H NMR, TGA and fluorescence microscopy. The results showed that NPA-HBPE had a great number of polar functional groups on the branched chains, and processed superior thermal stability, good ductility and excellent compatibility with the asphalt. More importantly, the NPA-HBPE demonstrated a significant effect on improving the bond strength of asphalts with cement mortar block. As the volume addition of NPA-HBPE-G4 was 10 wt%, the maximum bond strength of modified asphalts reached 1.23 MPa while that the base asphalt was only 0.48 MPa. Furthermore, the adhesive force of NPA-HBPE-G4 modified asphalts was high to 333 nN, and fairly better than that of base asphalts (71 nN). This study would provide a simple and efficient approach to improve the bond strength of asphalt, and would have enormous potential in the engineering field.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 11
·2763-2774
·
IF 2.578
Shuo Fan,Yanlu Sun,Xueli Wang,Jianyong Yu,Dequn Wu,Faxue Li
A novel organic-inorganic flame retardant (SP-APP) was first designed by coating ammonium polyphosphate (APP) with Schiff base-containing branched polysiloxane via ion exchange reaction and dehydration-condensation. High water resistance and charring capacity of the SP-APP greatly overcame the poor water resistance of APP and endowed polyamide 6 (PA6) with excellent flame retardancy and anti-dripping. The prepared PA6/SP-APP composite with 12 wt% of SP-APP reached the highest limited oxygen index (LOI) of 32.5% and passed V-0 rating of UL-94 test with non-dripping, while PA6 and PA6/APP with 12 wt% of APP failed to pass the UL-94 test. A sharp reduction of 50.9% in peak heat release rate (PHRR) and 29.4% in total heat release (THR) was found for PA6/SP-APP in contrast with PA6. The working mechanism of SP-APP in enhancing the flame retardancy of PA6 was also explored intensively and the synergistic effects of catalytic degradation of APP, self-crosslinking behavior of Schiff base structure and thermo-oxidative degradation of branched polysiloxane contributed to the improvement of flame retardancy of PA6/SP-APP.
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 29
·期 2
·941-950
·
IF 1.907
Jing Ma,Yi He,Guangyong Zeng,Fei Li,Yubin Li,Jianfei Xiao,Shuizhen Yang
Due to the narrow layer spacing, graphene oxide (GO) composite membrane usually exhibits a relatively low water flux in the process of wastewater treatment. In this study, GO was reduced to reduced graphene oxide through a bio-inspired method, which was functionalized modified by poly-dopamine (PDA). Then a series of PDA/reduced graphene oxide sheet films were prepared by vacuum filtration on the surface of cellulose acetate membrane (under the pressure of −0.1 MPa). The result indicated that the novel membranes had an excellent stability owing to the cross-link of PDA. In addition, the hydrophilicity of membrane was increased significantly after PDA modification, which presented a superior water flux than pure GO composite membrane. More importantly, as-prepared membranes were successfully applied for the removal of dyes (including Congo red, methylene blue, and rhodamine B) and heavy mental ion (Cu(II)) from simulated wastewater. This work might provide a new method for preparation and application of GO composite membranes.
研究领域:
材料科学
·
环境科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2017
·Vol. 29
·期 3
·1030-1038
·
IF 1.907
Gonglei Shao,Junfeng Xiao,Zhihong Tian,Jiajia Huang,Siguo Yuan
A novel chelating resin (PPS-ATD) containing N and S elements was prepared through the chloromethylation of polyphenylene sulfide resin and subsequent functionalization with 2-amino-1,3,4-thiadiazole (ATD). The structure of PPS-ATD was systematically characterized and analyzed by the Fourier transform infrared spectroscopy, elemental analysis, thermogravimetric analysis, scanning electron microscope, and energy dispersive spectrometer. The adsorption performance of PPS-ATD was evaluated by batch methods at different pH, temperature, adsorption time, and initial concentration, and the results showed that the PPS-ATD exhibited high adsorption capacity (197.79 mg·g −1 at 298 K) and selectivity for Hg(II). The adsorption of PPS-ATD for Hg(II) was well fitted by the Langmuir isotherm model, and the adsorption process was endothermic. After 5 consecutive regeneration cycles, no obvious loss in the adsorption capacity of the PPS-ATD was found, which implied that the PPS-ATD had great application prospects in the treatment of mercury-containing wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 5
·1360-1371
·
IF 2.137
Lei Zheng,Hui Wang,Xiaomin Cheng
In this study, a series of imprinted poly(methacrylic acid- co -ethylene glycol dimethacrylate) nanocarriers for diclofenac and corresponding nonimprinted polymer nanocarriers have been synthesized in 4 different types of solvents by precipitation polymerization. The products were characterized by Fourier transform infrared, scanning electron microscopy, dynamic light scattering, and Brunauer-Emmett-Teller measurement. Results showed that uniformly sized molecularly imprinted polymer (MIP) nanospheres with relatively good porosity could only be obtained in acetonitrile. The effects of solvents on the recognition and release properties of polymer particles were also carefully investigated. The binding experiments indicated that MIPs prepared in acetonitrile displayed much higher binding capacity than other MIPs with a maximum binding capacity of 65.18 mg g −1 . The Scatchard analysis showed that synthetic MIPs have special recognition sites for diclofenac, while nonimprinted polymers have not. The Sips model could provide a best fit to the equilibrium data of nanocarriers over whole concentrations. The experimental data of an adsorption kinetic study were well fitted to the pseudo–second-order kinetic model, indicating the chemisorption mechanism between diclofenac and MIPs in the process of adsorption. The drug release of diclofenac from MIPs could well be described by the Ritger-Peppas model, suggesting a non-Fickian diffusion mechanism. In addition, we successfully used MIPs to extract diclofenac at low levels from fetal bovine serum.
研究领域:
药学
·
材料科学
·
纳米技术
·
药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2013
·Vol. 24
·期 6
·600-608
·
IF 1.635
Zhenxun Huang,Jianqing Zhao,Yanchao Yuan,Shijing Yan,Shumei Liu,Xingtao Zan
In this study, amino derivative of pure silica zeolite nanocrystal (A-PSZN) was dispersed into polyimide (PI) matrix to prepare PI/A-PSZN hybrid films, and their thermal and mechanical properties, as well as hydrophobicity, were characterized scientifically. The test results show that PI/A-PSZN hybrid films possess higher glass transition temperature, higher thermal stability and lower in-plane coefficient of thermal expansion than pristine PI. The mechanical property data suggest that the incorporation of A-PSZN results in an increase in Young's modulus and tensile strength of the hybrid films, but as its content exceeds the critical value (maybe 5 wt%), its enhancement effect on the hybrid's strength and toughness gets weaker. Furthermore, liquid dripping imaging analysis results indicate that the film's hydrophobicity is clearly improved by the introduction of A-PSZN. As compared with PSZN, A-PSZN exhibits better effect on enhancing the overall performance of pristine PI films. A comparison with other studies suggests that PI/A-PSZN is a hybrid film with superior comprehensive properties. Copyright © 2013 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
化学工程
✓ 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）