CHINESE JOURNAL OF POLYMER SCIENCE
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2016
·Vol. 34
·期 8
·1039-1046
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IF 1.811
Gong Xian-jing,Shi De-an,Yang Ying-kui,Jiang Tao,Meng Yan-feng,Li Robert K. Y.,Jiang Shi-chun
Cross-linked PEG-based copolymers were obtained via synthesis of polyethylene glycol (PEG) and methoxy polyethylene glycol (MPEG) by the bridging and/or cross-linking agent of 2,4-tolylene diisocyanate (TDI) and/or hexamethylene-1,6-diisocyanate homopolymer (HDI trimer). The effects on the crystallization behaviors of the samples could be found with the changes in molecular weight of MC-PEG and molecular weight of SC-PEG in certain cross-linked density. It is revealed that the samples appear not to crystallize when the molecular weight of MC-PEG and SC-PEG are 1000 g/mol or less than that. The samples begin to crystallize when the molecular weight of either MC-PEG or SC-PEG reaches 2000 g/mol. The crystallinity of crystallized MC-PEG decreases with the increasing molecular weight of uncrystallized SC-PEG and the crystallinity of crystallized SC-PEG declines with the rise of molecular weight of uncrystallizable MC-PEG. The chains of SC-PEG ( M
n = 2000 g/mol) can fold and align easilier than those of MC-PEG ( M
n = 2000 g/mol), when the content of PEG is the same.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Liqin Zhou,Kungang Chai,Xingdong Yao,Hongbing Ji
It is highly desirable to design and fabricate porous bio-based adsorbent for efficient and selective recovery of acetophenone (AP) and 1-phenylethanol (PE) from the effluent of propylene oxide and styrene monomer co-production (PO/SM) process. Herein, using cassava starch as the starting material, starch-graft-styrene hypercrosslinked polymers (SSHCPs) were designed and synthesized facilely by starch-graft-styrene copolymerization and subsequent crosslinking via a Friedel-Crafts alkylation route. SSHCP-3 (knitted by 4,4′-bis-(chloromethyl)-1,1′-biphenyl) shows high BET surface area (818 m 2 ·g −1 ), large pore volume, and high thermal stability, making it a highly efficient adsorbent for removal of aromatic pollutants from water. SSHCP-3 showed high uptake for AP (2.82 mmol·g −1 ) and selectivity (4.95) of AP over PE in binary-solute adsorption experiments. Spectral studies and theoretical calculation demonstrated that AP and PE uptake could occur at glucose units and benzene moiety via van der Waals interaction and π-π stacking interactions. SSHCP-3 also showed excellent adsorption efficiency of AP (93.6%) and PE (74.4%) in the wastewater discharged from PO/SM process. These results demonstrated that transforming styrene and starch to bio-based hypercrosslinked polymers provides an environmentally friendly and attractive strategy for recovery of AP and PE in practical application.
研究领域:
环境科学
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材料科学
·
化学工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Kai Zong,Xiaojun Bao,Kejie Jiang,Mei Zhang,Dongshun Deng
Gaseous ammonia (NH 3 ) pollution is harmful to human health and the environment. Developing adsorbents with excellent performance are in demand for NH 3 capture and separation. In this work, hyper-crosslinked polymer (HCP) with abundant pore and suitable surface property was prepared by one-step cross-linking reaction and applied to support various Li salts. The as-obtained Li salts@ HCPs were systematically characterized and evaluated for NH 3 adsorption at different composition and experimental conditions. The preferred [email protected] displayed reversible and outstanding NH 3 adsorption capacity of 37.33 mmol/g at 25℃ and 1.0 bar. Furthermore, kinetic and thermodynamics analysis revealed that the weak chemisorption of NH 3 on [email protected] was mainly controlled by adsorption equilibrium on the inner surface. The adsorption mechanism was elucidated using spectroscopic analysis and DFT calculations. Present work could provide more understanding of the gas–solid adsorption behavior and offer guidance for designing advanced materials for NH 3 capture and separation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Vietnam Journal of Chemistry
·
2024
·
IF 1.3
Nguyen Binh Duong,Quan Thi Thu Trang,Phan Thi Ngoc Bich,Pham Van Lam
In this article, new interpenetrating polymer network (IPN) hydrogel as an efficient adsorbent for ammonium was prepared by a two-step process. First, semi-IPN hydrogel of chitosan-g-poly(acrylic acid)/bentonite (CAB) and chitosan (CTS) was synthesized by grafting polymerization in the presence of exfoliated bentonite as both cross-linking agent and nanoscale inorganic filler. Second, cross-linking polymer network of chitosan-glutaraldehyde (CGA) was formed by reaction of CTS with glutaraldehyde (GA). The obtained IPN hydrogel (CAB/CGA) was characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy and its swelling degree and PZC value were also measured. These results demonstrate that copolymerized graft reaction was occurred between CTS, AA and bentonite forming CAB, and CGA presented as a cross-linker in CAB/CGA polymer network. CAB/CGA has a moderate swelling degree of 7.8. CAB/CGA exhibits high adsorption capacity and fast adsorption rate for ammonium. Adsorption process reaches equilibrium in 30 min and fits well to Langmuir adsorption model with a fairly high maximum adsorption capacity of 41.06 mg g −1 . The material has a good regeneration ability. After five times of adsorption–desorption, there was almost no decrease in ammonium adsorption capacity. Moreover, the low swelling degree leads to an improvement in material strength and a reduction of equipment cost.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Dong Dong,Shujun Zhang,Weiwei Huo,Ming Zhao,Jun Li,Guohua Dong,Yingnan Zhao,Min Zhu,Zhichun Shi
Antibiotic contamination remains a challenge for wastewater treatment . In this work, a hyper-cross-linked polymer (DHCP-TP 3 ) with a dual nitrogen-rich structure was synthesized by a one-step facile Friedel-Crafts reaction, and a Fe 3 O 4 @DHCP-TP 3 composite was prepared by postmodification with the introduction of magnetic iron oxide nanoparticles (Fe 3 O 4 NPs), which were applied to the adsorption of tetracycline (TC) from aqueous solution. The TC adsorption capacities of the DHCP-TP 3 and Fe 3 O 4 @DHCP-TP 3 composites reached 519.65 and 893.85 mg·g −1 , respectively, and the adsorption processes for both followed the pseudo-second-order kinetic model and the Freundlich isothermal model. Fe 3 O 4 @DHCP-TP 3 can achieve adsorption equilibrium for TC within 200 min, and also exhibits excellent regeneration and magnetic separation capabilities. Complexation, hydrogen bonding, cation exchange and π-π interactions were the main adsorption mechanisms. Moreover, Fe 3 O 4 @DHCP-TP 3 could also adsorb other pollutants, including sulfadiazine (SD), sulfamethoxazole (SMZ), methyl orange (MO), methylene blue (MB), 2,4-dichlorophenol (2,4-DCP), and iodine (I 2 ). The brief synthesis, high adsorption capacity and easy regeneration certified that HCPs were ideal adsorbents for removing pollutants from wastewater.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Lijing Zhu,Haiming Song,Dawei Zhang,Gang Wang,Zhixiang Zeng,Qunji Xue
Polysulfone (PSf) membrane has been widely used in water separation and purification, although, membrane fouling is still a serious problem limiting its potential. We aim to improve the antifouling of PSf membranes via a very simple and efficient method. In this work, antifouling PSf membranes were fabricated via in situ cross-linked polymerization coupled with non-solvent induced phase separation. In brief, acrylic acid (AA) and vinyltriethoxysilane (VTEOS) were copolymerized in PSf solution, then directly casted into membranes without purification. With the increase of monomers concentration, the morphology of the as-cast membranes changed from a finger-like morphology to a fully sponge-like structure due to the increased viscosity and decreased precipitation rate of the polymer solutions . Meanwhile, the hydrophilicity and electronegativity of modified membranes were highly improved leading to inhibited protein adsorption and improved antifouling property. Furthermore, in order to further find out the different roles player by AA and VTESO, the modified membrane without VTEOS was prepared and characterized. The results indicated that AA is more effective in the membrane hydrophilicity improvement, VTEOS is more crucial to improve membrane stability. This work provides valuable guidance for fabricating PSf membranes with hydrophilicity and antifouling property via in situ cross-linked polymerization.
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
·
IF 6.953
Kongyou Wu,Kungang Chai,Liqin Zhou,Zhiliang Duan,Haibo Wu,Zhenghui Huang,Dongli Li,Zhongwei Tan,Fang Shen,Zongwu Wei,Hongbing Ji
Herein, a TEMPO-oxidized cellulose-grafted-polystyrene hypercrosslinked polymer (TOC-PS-HCP) was synthesized facilely by TEMPO oxidation , grafting copolymerization and post crosslinking route. Based on the structural characterization, it was confirmed that TOC-PS-HCP mainly consisted of polystyrene chain on cellulose and rigid crosslinked bridge. Additionally, the as-prepared TOC-PS-HCP displayed appropriate hydrophobicity (water contact angle = 102.44°) and high specific surface area (S BET = 601.20 m 2 ·g ‐ −1 ), which could efficiently recover ethylbenzene and styrene from PO/SM wastewater. The adsorption experiment was conducted to study the recovery performance for ethylbenzene and styrene in the aqueous phase. The results showed that TOC-PS-HCP could recover ethylbenzene and styrene quickly by adsorption process, and maintain a stable recovery rate both in different aqueous conditions and recycle experiments. The adsorption experiment in the simulated wastewater solution showed that TOC-PS-HCP exhibited the greater affinity for ethylbenzene and styrene than other substrates. Furthermore, a possible mechanism for the efficient recovery of ethylbenzene and styrene was suggested on the basis of experimental and theoretical results, which may be associated with van der Waals force and π-π stacking.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhichun Shi,Haoyuan Tang,Liqiu Sun,Jianjun Wang,Jun Li,Dan Wang,Liying Qi,Liyan Wang,Guohua Dong,Ming Zhao
Designing and preparing of materials for highly efficient and reversible iodine adsorption remains a challenging task. In this study, a series of benzonquanmine-based hypercrosslinked polymers (BHCPs) with nitrogen-rich were designed and synthesized via Friedel-Crafts reaction. The obtained BHCPs showed the high specific surface and high thermal stability. Moreover, the BHCP-3 of BHCPs exhibits excellent iodine capture performance, including ultrahigh iodine vapor adsorption capacity of 619 wt%, the breakthrough iodine experiment of the adsorption capacity reached 2.29 g/g, which is the highest published capacity of HCP adsorbent. And the removal rate of iodine in aqueous solution also reached 92.5 %, and reached 87.4 % the first 10 min, demonstrating rapid adsorption effects. Additionally, the iodine adsorption process of BHCPs conformed to the pseudo-second-order kinetic models, and which were a multi-layer adsorption on non-homogeneous surfaces. Furthermore, the three adsorbents maintained more than 85 % of their iodine capture capacity after five cycles, demonstrating their good recyclability and potential for practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zi-hui Ma,Tao Yang,Yan Song,Xiao-dong Tian,Zheng-yang Liu,Xiang-jie Gong,Zhan-jun Liu
Hyper cross-linked polymers (HCPs), as a key precursor of hard carbon (HC) anode materials, stand out because of their capacity for molecular-scale structural design and comparatively straightforward preparation techniques, which are not seen in other porous materials synthesized procedure. A novel synthesis method of HCPs is developed in this paper, which is through the incorporation of functional macromolecules , the structural control and heteroatom doping of the product has been achieved, thus augmenting its electrochemical performance in batteries. In this work, carbonized tetraphenylporphyrin zinc (TPP-Zn) doped HCP-based hard carbon (CTHCP) with stable structure was prepared by Friedel-Crafts reaction and carbonization by using naphthalene and trace TPP-Zn as monomers, dimethoxybenzene (DMB) as crosslinking agent and FeCl 3 as catalyst. The introduction of TPP-Zn, a functional macromolecule with unique two-dimensional structure, realized the pore structure regulation and N doping of the raw carbonized HCP-based hard carbon (CHCP). The results showed that CTHCP had higher mesoporous volume, N content and wider layer spacing than CHCP. In addition, CTHCP anode exhibited excellent Li + /Na + storage performance, initial reversible capacity, rate performance and long cycle life. More amount of N -containing (N-5) active sites and mesoporous content in CTHCP anode was the main reason for the improvement of Na + storage effect. While the increased interlayer spacing had a greater effect on the lithium storage capacity. This study uncovered the design rules of HC anode materials suitable for Li + /Na + batteries and provided a new idea for the preparation of high-performance HC anode materials.
研究领域:
材料科学
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能源化学
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Siyang Mu,Jing Guo,Sen Zhang,Qingda An,Di Wang,Yuanfa Liu,Fucheng Guan
In this paper, a novel form-stable phase change material (FSPCM) of cross-linked poly(acrylonitrile-co-itaconate) (P(AN-co-IA))/polyethylene glycol (PEG) blend was prepared successfully. And it was systematically characterized by Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), polarized optical microscopy (POM), Scanning electron microscope (SEM) and Thermal gravity analysis (TGA). FTIR analysis indicates that the cross-linked network has been synthesized. The DSC results show that the cross-linked FSPCM owns excellent phase change properties. The phase change temperatures and latent heats of the cross-linked FSPCM are in the range of 29–53 °C and 56.98–97.46 J/g, respectively. The TGA manifest that the cross-linked FSPCM appears good thermal stability and a broad processing temperature range.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Zhang Chenyuan,Liu Zhiqiang,Zhang Zhijia,Zhou Wenjun,Wang Guojun,Zhang Songsong,Wei Hao,Wang Qiang,Ma Teng,Li Rui
In practical applications, the scratch or damage of materials are inevitable. Self-healing materials are beneficial to the sustainable use of materials. Herein, the dual cross-linked self-healing polyurethane (PU-xUPy) were prepared by copolymerization of diisocyanate monomers, quadruple hydrogen bond chain extender based on 2‐ureido‐4[1H]‐pyrimidinone (UPy) and triol monomers. The PU-xUPy exhibit excellent mechanical properties owing to the covalent cross-linking via triol monomer and the noncovalent-linking via UPy. The tensile strength and elongation at break of PU-75UPy were 9.6 MPa and 420.1%, respectively. The self-healing efficiency of the tensile strength and elongation at break were achieved to 73% (the tensile strength is 7.0 MPa) and 72.7% (the elongation at break is 306.6%) after 24 h of healing at 40 ℃, respectively. Moreover, the cyclic fatigue tensile test provided the evidences of the breaking and recombination of hydrogen bonds. These promising outcomes are expected to promote the development of the sustainable application of polyurethane elastomers .
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Ying Qiu,Huiyu Liu,Rui Shan,Wei Zhao,Junhua Zhang,Jun Zhang,Haoran Yuan
In the present study, the ultra-large specific surface area Zr-decorated hyper-cross-linked polymers (HP) were firstly developed for the catalytic production of furfuryl alcohol (FOL) from furfural (FAL) using isopropanol as both the hydrogen source and solvent. Comprehensive characterizations were performed to uncover the basic physicochemical properties. The as-prepared Zr/HP showed large specific surface area of ∼1000 m 2 /g, good dispersion of Zr species, plentiful acidity and basicity. 2.5Zr/HP presented the highest activity in the FAL-to-FOL transformation, wherein 97.4 % FAL conversion and 92.9 % FOL yield were achieved within 2 h at 160 °C. The recycling experiments revealed that the as-fabricated Zr-decorated hyper-cross-linked polymers presented good recyclability without significant loss of reactivity even after two consecutive cycles, owing to the strong interaction between hyper-cross-linked polymers and grafted Zr species. Kinetical analysis verified that the activation energy for transfer hydrogenation of FAL could be lowered to a certain degree, especially in the case of lower Zr loadings. More gratifyingly, the Zr-decorated hyper-cross-linked polymers were capable of catalyzing other unsaturated compounds with high conversion rates. In addition, the plausible pathway for the FAL-to-FOL transformation over Zr-decorated hyper-cross-linked polymers was proposed.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）