POLYMER TESTING
·
2014
·
IF 1.816
Ya-nan Wang,Yun-xuan Weng,Lei Wang
The applicability of bamboo flour (BF) blended with polylactic acid (PLA) to improve the properties of PLA for widespread use as an environmentally friendly, biodegradable polymer is limited by the poor compatibility of these materials. Therefore, as a potential compatibilizer for PLA/BF composites, PLA-g-glycidyl methacrylate (GMA) was synthesized by grafting GMA onto PLA using benzoyl peroxide and tert-butyl peroxy benzoate as initiators. GMA grafting onto PLA was confirmed by infrared testing and elemental analysis . Then, PLA/BF biocomposites were prepared by blending PLA (85 wt%) and BF (15 wt%) with different concentrations of PLA-g-GMA. The phase morphology, thermal stability and mechanical properties of the composites prepared with PLA-g-GMA were improved over those of PLA/BF composites without compatibilizer, as characterized by scanning electron microscopy, thermogravimetric analysis and using a universal materials tester, respectively. Specifically, the thermal decomposition temperature , tensile strength and tensile modulus of PLA/BF biocomposites prepared with 15 hpr PLA-g-GMA were increased.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Hongtao Shi,Shuyu Zhao,Lian Chen,Yanyang Tian,Lifen Li,Yan Cao,Jiangyao Han,Liangran Zhang
To develop eco-friendly wood-plastic composites (WPCs) with enhanced performance, this study focused on improving the interfacial compatibility between polar plant fibers and the weakly polar polylactic acid (PLA) matrix by grafting glycidyl methacrylate (GMA) onto PLA via solid-phase modification. Using benzoyl peroxide as an initiator in a high-speed mixer, 10 PLA-g-glycidyl methacrylate (PLA-g-GMA) copolymers with varying grafting ratios were synthesized. The chemical structures of these copolymers were characterized using FTIR and 1H NMR spectroscopy. The results indicated that the grafting degree of PLA initially increased and then decreased with increasing GMA content, peaking at 15% GMA with a grafting rate of 9.62%. Bamboo plastic composites (BPCs) were prepared by hot-pressing PLA-g-GMA with bamboo flour (BF). Physical and mechanical testing showed that both water resistance and mechanical properties of the composites initially improved and then declined with increasing GMA content. Notably, the composite based on 13% GMA-modified PLA exhibited the best water resistance, with a 24 h water absorption of only 1.05%. Composites prepared with 15% GMA-modified PLA showed the best overall performance, showing increases in static flexural strength, elastic modulus, and impact strength by 168.86%, 94.06%, and 45.67%, respectively, compared to the unmodified composite. Additionally, the 15% GMA modification slowed soil-burial degradation. These findings indicate that moderate grafting of PLA significantly enhances interfacial adhesion and performance in biobased composites, providing a theoretical foundation and data support for the design of high-performance, environmentally friendly WPCs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Royal Society Open Science
·
2018
·Vol. 5
·期 6
·
IF 2.504
Youning Chen,Wei Zhao,Huan Wang,Xiaohua Meng,Linjie Zhang
A novel polyamine-type starch/glycidyl methacrylate (GMA) copolymer with a high capacity for the adsorption of heavy metal ions was prepared via graft copolymerization of GMA and corn starch and a subsequent amination reaction between amino group of diethylenetriamine and epoxy group in GMA. The copolymers were characterized by Fourier transform infrared spectrometry, X-ray diffraction and scanning electron microscopy, and adsorption properties on modified starch of Cu(II), Pb(II), Cd(II) and Cr(III) were studied. By analysing the relationship between adsorption capacity and pH, adsorption isotherms and adsorption kinetics, it is proved that the adsorption of the four metal ions is mainly based on the chemical adsorption of coordination. The maximum adsorption capacities of the copolymer were up to 2.33, 1.25, 0.83 and 0.56 mmol g−1 for Cu(II), Pb(II), Cd(II) and Cr(III), respectively. The adsorption of the four concerned metal ions was hardly affected by common coexisting ions such as Na(I), K(I), Ca(II) and Mg(II), whereas it was slightly decreased when Fe(II) and Zn(II) coexisted in the solution, which illustrates the selective adsorption of Cu(II), Pb(II), Cd(II) and Cr(III) from wastewater. After 10 cycles of adsorption–desorption experiments, there was no significant change in the adsorption capacity, indicating that the polyamine-type starch/GMA copolymer has high adsorption capacity and good reusability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 11
·46020
·
IF 1.86
Shan Jiang,Wei Wang,Tianya Huang,Jie Ma,Yonghong Ding,Qiang Yu
Terpolymer poly(α-methylstyrene- co -glycidyl methacrylate- co -4-acryloyl tetraphenylethylene) (PAGT) was synthesized by radical copolymerization using α-methylstyrene, glycidyl methacrylate, and trace fluorescent monomer 4-acryloyl tetraphenylethylene. Thermal decomposition of α-methylstyrene constitutional units in copolymer chains is known to produce macromolecular radicals at temperatures exceeding 90 °C, which may be melt-grafted to polypropylene (PP) without other initiators by means of extrusion. In this study, the PP- g -PAGT microporous material was prepared by casting and stretching. The structure and properties of the PAGT were characterized by Fourier transform infrared spectroscopy, 1 H-nuclear magnetic resonance, and thermogravimetic analysis. The grafting degree and rheological properties proved that the PAGT chains were successfully grafted onto the PP. The uniformity of the PAGT in the PP- g -PAGT was observed using a spectrofluorophotometer. The polarity of the cast membrane was characterized by the water contact angle. The results showed that the PAGT evenly grafted onto the PP, and the polarity and hydrophilicity of the cast membranes were improved. The microporous structure of the separator was observed via scanning electron microscopy. Testing of the performance of the lithium battery showed that the impedance decreased and the ionic conductivity increased with the introduction of PAGT onto PP. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46020.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Ailin Gao,Guangfa Zhang,Shuai Zhao,Jian Cui,Yehai Yan
Outstanding separation properties combining high water permeability and permselectivity have always been a pursuit for porous membranes, which were commonly determined by the membrane structure and surface properties. In this work, PLA membrane with unique nanoscale bicontinuous structure was fabricated by non-solvent induced phase separation (NIPS) process involving in situ crosslinking of glycidyl methacrylate (GMA) monomers in polylactic acid (PLA) casting solution. Afterwards, systematic approaches were carried out to characterize the regulating functions of the in situ formed polymerized GMA (PGMA) on the morphology, pore shape, pore size, porosity, wettability , water flux and solutes rejection of developed PLA membranes. With the addition of GMA monomers, novel bicontinuous interconnected PLA membranes with narrowly distributed nanoscale pores were obtained. These generated PLA membranes presented higher water flux and better selective rejection to various dextran molecular owing to their larger effective pore size and narrower pore size distribution . This study provides an innovative strategy to overcome the trade-off issue when membranes are used for water treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2016
·Vol. 31
·期 7
·1391-1399
·
IF 3.379
Jing Zhang,Beibei Chen,Han Wang,Xi Huang,Man He,Bin Hu
Microfluidic devices provide a potential platform that can specialize in miniaturization, integration and automation. In this study, we prepared ethanediamine modified poly glycidyl methacrylate trimethylol propane triacrylate monolithic columns (poly (GMA-co-TRIM-NH2)) in a microfluidic chip channel and established a novel method by combining chip-based poly (GMA-co-TRIM-NH2) monolithic microextraction with inductively coupled plasma mass spectrometry (ICP-MS) for the determination of bismuth in cell samples. Various factors affecting chip-based monolithic microextraction of bismuth were investigated. Under the optimized conditions, the limit of detection was 0.21 ng mL−1 and the relative standard deviation for bismuth was 6.0% (c = 5 ng mL−1, n = 7). The method was successfully applied to the analysis of HepG2 cells incubated with bismuth. With consumption of ∼600 cells, the average amount of bismuth was determined to be at the sub picogram level in a single cell. The prepared chip-based poly (GMA-co-TRIM-NH2) monolithic column had a high-surface area and exhibited high extraction efficiency towards bismuth. The proposed chip-based monolithic microextraction method combined with ICP-MS provides a novel strategy for the analysis of trace metals in cells.
研究领域:
分析化学
·
生物技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiewen Li,Qin Lai,Chuanshuang Hu,Xiuyi Lin,Wenting Li,Xianfeng Hou,Hong Yun,Weiwei Zhang
Glycidyl methacrylate (GMA) has great potential in bamboo anti-mildew modification because it could polymerize in-situ to produce high-molecular polymer and its epoxy groups could react with hydroxyl groups of nutrients in bamboo which cannot any longer serve as a nutrient source for mold. In this study, transparent GMA microemulsion was prepared with citric acid (CA) and further used for bamboo modification through in-situ polymerization and cross-linking reactions. The results showed that when the concentration of GMA microemulsion reached 6 % or higher, anti-mildew efficiency was 100 % for the modified bamboo. SEM, Raman spectra and XPS results indicated poly(glycidyl methacrylate) (PGMA) was mainly distributed in the bamboo cell wall and a small portion covered the surface of the cell lumen and starch particles. Besides, chemical bonds were formed between the PGMA and the cell wall components/starch particles. Bamboo modification based on the physical coverage and chemical bonding of starch particles prevented mold from directly accessing the nutrients, leading to excellent anti-mildew property. The mechanical and thermal properties of the modified bamboo enhanced significantly due to the presence of PGMA in cell wall. The GMA microemulsion showed a great potential for bamboo modification application.
研究领域:
材料科学
·
高分子化学
·
木材科学
·
生物材料改性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Guang-ze-guo Zhou,Jian-hua Zu,Li-bing Zhu,Xiao-jing Liu,Yu Wang,De-rui Zheng,Xiao-han Pan,Yi Xue
Based on previous operational experience, activated corrosion products account for approximately 80% of the radioactive nuclides during refueling outages. After taking measures to control 58 Co and 60 Co, 110m Ag has emerged as the main contributor to the radiation field in the primary loop. Traditionally, ion exchangers in Chemical and Volume Control Systems (CVCS) are responsible for removing 110m Ag. However, their limited adsorption capacity and poor selectivity result in the generation of substantial solid radioactive waste, which directly increases the treatment cost. To address this challenge, we developed PP-g-GMA@MoS 4 , a MoS 4 2− -functionalized PP nonwoven fabric synthesized via irradiation copolymerization and ion exchange. This adsorbent can stably removes >95% of Ag + across pH 1–5.9. Under simulated conditions (pH = 3), its adsorption capacity reached 623.05 mg/g, outperforming previously documented adsorbents. The adsorption process was better described by the Freundlich isotherm and the pseudo-first-order kinetic model. In the presence of an 80-fold excess of competitive ions, the distribution coefficient of Ag + still reached 10 5 mL/g and the separation factors of Ag + relative to each coexisting metal ion (SF Ag,m ) were 10 4 times higher than those of commercial resins. Exposure to 150 kGy of γ-ray irradiation did not significantly affect the adsorption performance of PP-g-GMA@MoS 4 . XPS, TEM, XRD and Raman spectra were conducted to explain the adsorption mechanism. These features—high capacity, outstanding selectivity, excellent irradiation resistance, and low material cost—make PP-g-GMA@MoS 4 a promising candidate for minimizing radioactive waste generation during 110m Ag removal in nuclear power plants.
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Bo Tian,Xin-Yi Wang,Lin-Nan Zhang,Fa-Nian Shi,Yan Zhang,San-Xi Li
In this research, poly(vinylidene fluoride) (PVDF) anionic exchange membranes were prepared by a method of chemically induced grafting of glycidyl methacrylate (GMA) onto PVDF macromolecule in solution. Various preparation parameters, including initiator, monomer and cross-linker concentrations, grafting time and temperature, drying time of the anionic membranes, were established in correlation with area resistance and anionic permselectivity of the obtained anionic exchange membranes. The chemical and crystal changes of the membranes were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD), respectively. Surface morphologies and thermal stability were also evaluated by field emission scanning electron microscopy (FT-SEM) and thermogravimetric analyzer (TGA). The results reveal that a PVDF anionic exchange membrane is successfully prepared by this method and shows excellent properties with area resistance as low as 4.3 Ω ⋅ cm 2 and anionic permselectivity as high as 99%, which are comparable to those of some commercial anionic exchange membranes, such as AHA, AMX, AST and so on. The membranes are homogenous, compact and show great thermal stability up to 171 °C and excellent alkali stability.
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
DENTAL MATERIALS JOURNAL
·
2020
·Vol. 39
·期 5
·900-908
·
IF 1.359
Longzhao KANG,Yan ZHOU,Jinle LAN,Yunhua YU,Qing CAI,Xiaoping YANG
This study intends to obtain a kind of polymer-infiltrated ceramic-network (PICN) composite with improved performance for dental restoration. Porous ceramic network was prepared via compressing feldspar powders, followed by resin infiltration using Bis-GMA/TEGDMA or UDMA/TEGDMA mixtures to obtain PICN composites after thermocuring. The sintering parameters (temperature, duration) for the formation of feldspathic network with proper porosity were investigated. The ratios of resin mixtures were adjusted to optimize the infiltration. Comprehensive characterizations were conducted on the porosity and the shrinkage of preformed ceramic-networks, the viscosity of resin mixtures and their infiltration into the ceramic networks, as well as, flexural properties, Vickers hardness and wear resistance of the final PICN composites. It turned out that the PICN composite prepared from Bis-GMA/TEGDMA (6:4) achieved the best performance among all the samples, which is expected to be a suitable material for computer-aided design/computer-aided manufacturing (CAD/CAM) dental restorative applications.
研究领域:
材料科学
·
牙医学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 1
·e54763
·
IF 3
Yupeng Su,Kehui Han,Martin Hoch,Jie Mao,Xinyan Shi
Moisture crosslinking would be a good substitution to cure ethylene-vinyl acetate-glycidyl methacrylate rubber (EVM-GMA) due to the characteristics of low cost and environmental friendliness. Our previous study found amino silane grafted onto EVM-GMA with low degree due to the low epoxy group content in rubber matrix. Consequently, the moisture crosslinking density of rubber compound is low. So, it is necessary to find an effective method to improve the moisture crosslinking density of EVM-GMA. In this paper, EVM-GMA grafted with γ-aminopropyltriethoxysilane and maleic anhydride (EVM-GMA-g-APTES/MAH) composites were prepared by melt blending, and then the moisture crosslinking of composites was achieved in a 90°C water bath with the aid of catalyst dibutyltin dilaurate (DBTL). The grafting of MAH onto the EVM-GMA molecular chain and its reaction with amino silane were confirmed by differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR). Furthermore, the moisture crosslinking density of the samples before and after grafting MAH was compared. The results indicated that the moisture crosslinking density of the grafted MAH was higher than that of the unmodified rubber, thus achieving better overall mechanical properties. Therefore, grafting MAH was a feasible way to improve the moisture crosslinking density of EVM-GMA with the existence of silane.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Advances
·
2021
·Vol. 2
·期 6
·2120-2131
·
IF 0
Chaoshi Chen,Muhammad Atif,Kang He,Miao Zhang,Lijuan Chen,Yanmei Wang
In this work, binary mixed polymer brushes based on poly[(2-methyl-2-oxazoline)-random-glycidyl methacrylate] (PMOXA-r-GMA) and poly(glycidyl methacrylate)-block-poly(N-isopropyl acrylamide)-block-polystyrene (PGMA-b-PNIPAM-b-PSt) were used as thermoresponsive coating to control protein adsorption. Firstly, PMOXA-r-GMA was synthesized via cationic ring opening polymerization of 2-methyl-2-oxazoline followed by its copolymerization with glycidyl methacrylate (GMA); PGMA-b-PNIPAM-b-PSt was synthesized by reversible addition–fragmentation chain transfer polymerization of GMA, N-isopropyl acrylamide, and styrene sequentially. Then the mixed brushes were fabricated successfully by spin coating the mixture of PMOXA-r-GMA and PGMA-b-PNIPAM-b-PSt solutions onto silicon or glass substrates followed by an annealing protocol using GMA segments as an anchor. Afterwards, the investigation for adjusting the hydrophobic property of mixed brushes was performed. The results showed that when the environmental temperature is lower than the lower critical solution temperature (LCST) of PNIPAM, the tethered PNIPAM blocks are swollen and could bring the hydrophobic PSt block with optimum molar mass to the surface; when the environmental temperature is higher than the LCST of PNIPAM, the PNIPAM blocks collapse and could bring the hydrophobic block inside the hydrophilic PMOXA grafted polymer layer. Finally, the protein adsorption on mixed polymer brushes was investigated using a fluorescein isothiocyanate-labelled protein assay and ellipsometrys. The results showed that under the optimum molar mass of PSt block, mixed brushes could adsorb proteins in large quantities below the LCST of PNIPAM, and display resistance to protein adsorption above the LCST of PNIPAM.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
危险品化学品经营许可证（带存储）