CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Tao Wang,Xueyan Mu,Haibo Li,Weilong Wu,Jun Nie,Dongzhi Yang
We developed a copolymeric bioadhesive system with the potential to be used as a tissue adhesive based on biopolymer dextran. Copolymeric hydrogels comprising a urethane dextran (Dex-U) and 2-hydroxyethyl methacrylate (HEMA) were prepared and crosslinked under the ultraviolet (UV) irradiation. In this study, the photopolymerization process was monitored by real time infrared spectroscopy (RTIR). The adhesion strength was evaluated by lap-shear-test. The surface tension, viscosity of the solutions and the cytotoxicity assays were investigated. Compared to Dex-U system, the addition of HEMA remarkably improved the properties of Dex-H system especially the adhesion strength and the nontoxicity. And materials variation could be tailored to match the need of tissues. The copolymeric tissue adhesives demonstrated promising adhesion strength and nontoxicity. The maximum adhesion strength reached to 4.33 ± 0.47 Mpa which was 86 times higher than that of Tisseel. The obtained products have the potential to serve as tissue adhesive in the future.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2014
·
IF 1.189
Wanqin Jin,Liming Yang,Wei Yang,Bin Chen,Jie Chen
A novel method for grafting of 2-hydroxyethyl methacrylate (HEMA) onto the surface of stainless steel (SS) was explored by using 60 Co-γ irradiation. The surface of SS was modified by coating of dopamine before radiation grafting. The grafting reaction was performed in a simultaneous irradiation condition. The chemical structures change of the surface before and after grafting was demonstrated by Fourier transform infrared (FTIR) spectrometer. The hydrophilicity of the samples was determined by water contact angle measurement in the comparison of the stainless steel in the conditions of pristine, dopamine coated and HEMA grafted. Surface morphology of the samples was characterized by atomic force microscope (AFM) and scanning electron microscope (SEM). The corrosion resistance properties of the samples were evaluated by Tafel polarization curve. The hemocompatibility of the samples were tested by platelet adhesion assay.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2013
·
IF 4.093
Guoliang Zhang,Shufei Lu,Liang Zhang,Qin Meng,Chong Shen,Jiwei Zhang
Hybrid membranes formed by blending TiO 2 nanoparticles and organic materials are attractive for creating new materials with enhanced properties such as high permselectivity, good hydrophilicity and excellent fouling resistance in a wide range of applications. In order to overcome the agglomeration of nanoparticles in membranes and leakage of nanoparticles from nanocomposite membranes in the water treatment process and enhance the hydrophilicity of membranes, polymer chains of HEMA (2-hydroxyethyl methacrylate) were grown from TiO 2 by the atom transfer radical polymerization (ATRP) process in methanol. The hybrid polysulfone (PSF) membranes were then prepared by adding different ratios of TiO 2 (T membranes) and TiO 2 -g-HEMA (HT membranes) particles via phase inversion induced by the immersion precipitation technique. The modification nanoparticles were found to provide obvious improvements in reducing the particles agglomeration and fouling in sheet membranes. Different techniques such as SEM, TEM , FTIR, EDS, contact angle goniometry and filtration experiments of water, BSA and EPS were applied to characterize and explore the performance of particles and membranes. Compared with unmodified TiO 2 particles, modified TiO 2 particles held enhanced hydrophilicity, better compatibility and dispersibility in organic solvent and matrix polymer . Similarly, the HT membranes exhibited superior water flux and anti-pollution performance in separation than the pure PSF membrane and T membranes.
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
SYNTHETIC METALS
·
2025
·
IF 4.6
Yu Lin,Gen Li,Juan Teng,Haibo Wang,Ximei Liu
As a crucial component of flexible electronic devices, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based hydrogels for strain sensors have garnered extensive attention for their potential in the field of wearable sensors due to their inherent conductivity and flexibility. However, challenges such as poor mechanical strength, limited sensitivity, and poor durability have hindered the widespread application of PEDOT:PSS hydrogels in high-performance strain sensors. In this study, we develop a novel PEDOT:PSS-P(HEMA-co-AA) hydrogel that addresses common limitations in hydrogel applications, demonstrating remarkable stretchability, low hysteresis, and reliable conductivity. The hydrogel is synthesized using a semi-interpenetrating polymer network (SIPN) strategy, combining the linear conducting polymer PEDOT:PSS with a chemically cross-linked network based on 2-hydroxyethyl methacrylate (HEMA) and acrylic acid (AA). This hybrid structure notably contributes to the hydrogel's mechanical properties, achieving a stretchability of 195 %, while maintaining a rapid response time of 0.20 seconds and exceptional cyclic stability over 1000 cycles under 100 % strain. Moreover, the hydrogel demonstrates promising strain-sensing capabilities, positioning it as a strong candidate for future applications in wearable electronics and flexible sensors. The adoption of the SIPN strategy, along with the synergistic combination of PEDOT:PSS and P(HEMA-co-AA), paves a new pathway for enhancing the mechanical performance and sensing properties of hydrogels in strain-sensing technologies.
研究领域:
材料科学
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柔性电子
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Yang Wu,Kai Xu,Ruiming Yin,Jing Li,Ruimeng Xue
In the traditional raw materials used for preparing Sialon ceramics, hydrolytic AlN , cannot easily be used for aqueous gelcasting. To overcome this problem, a new type of gelcasting technique was developed. By introducing 1-methyl-2-pyrrolidinone (NMP) as a solvent, Sialon ceramics were formed using a low-viscosity non-aqueous gel system based on the 2-hydroxyethyl methacrylate (HEMA) gelling agent in this work. Based on this gel system, the rheological properties of the slurry and the solidification and sintering properties of Sialon ceramics were studied. The results show that the best rheological properties of slurry can be obtained with the dispersant dosage of 6 vol%. As the HEMA content increases, the flexural strength of the green bodies increase. When the ratio of HEMA to TMPTA (trimethylolpropane triacrylate) is 10:1 and the HEMA content is 15 wt%, the flexural strength of the green body reaches a maximum of 13.07 MPa. β′-Sialon ceramic has the best comprehensive mechanical properties at the sintering temperature of 1700 °C. Its bulk density, Vickers hardness , fracture toughness and flexural strength were 3.207 g/cm 3 , 1484 HV, 7.11 MPa m 1/2 and 351 MPa, respectively.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Xiaojia Zhao,Junjie Fu,Fangqian Yin,Chaoqun Li,Yuyang Xu,Guirong Peng
A one-step co-deposition method based on dopamine and hydrophilic hydroxyethyl methacrylate (HEMA) was proposed for the modification of polyvinylidene fluoride (PVDF) membrane, which could ameliorate its oil-water separation performances and hydrophilicity. A range of modified membranes were prepared by adding different content of HEMA in the reaction solution. For the improved membrane, the minimum water contact angle can reach 13.63°, and the maximum underwater oil contact angle can reach about 150°. The pure water flux for the improved membrane reaches 9668 L·m -2 ·h -1 ·bar -1 , showing excellent hydrophilicity. In addition, the separation efficiency of the improved membrane for a variety of oil-water emulsions exceeds 98%, indicating good permeability and circulating oil resistance. At the same time, this approach is also applicable to other membranes on account of the extensive availability of dopamine.
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 APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 9
·
IF 1.64
Yan-Yan Hu,Jing Zhang,Qi-Chen Fang,Dong-Mei Jiang,Chu-Cheng Lin,Yi Zeng,Ji-Sen Jiang
A novel semi-interpenetrating poly(2-hydroxyethyl methacrylate) (pHEMA) based polyelectrolyte hydrogel [p(HEMA- co -METAC)/PEG] was prepared by copolymerizing HEMA with the cationic monomer 2-methacryloyloxyethyltrimethyl ammonium chloride (METAC) in the presence of polyethylene glycol (PEG) with different content and molecular weight (MW 4000 and 400). The chemical structure of the gels was confirmed by FT-IR spectroscopy, morphology study was performed by scanning electron microscope (SEM), thermal stability was revealed by thermogravimetric analysis (TGA), and the mechanical properties were determined by electronic universal testing machine. Swelling studies showed introduction of cationic monomer METAC led to high water content, and the obvious salt and pH sensitive properties were observed which proved the smart behavior of the semi-interpenetrating polymer networks (IPNs) gels. In addition, the effect of temperature and some important biological solution on swelling behavior were reported. Cytotoxicity test demonstrated that synthesized gels owned satisfactory cytocompatibility and were convenient for the application as biomaterials. Finally, the weak bovine serum albumin (BSA) adsorption on semi-IPNs by introducing METAC and controlling the content of PEG in gels demonstrated that they were of good protein resistance effect in biomedical applications. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41537.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
HOLZFORSCHUNG
·
2018
·Vol. 73
·期 5
·469-474
·
IF 2.079
Yaoge Huang,Gaiyun Li,Fuxiang Chu
Poplar wood samples (2×2×2 cm 3 ) were vacuum/pressure impregnated in alcoholic solution with 2-hydroxyethyl methacrylate (HEMA) and 3-(methacryloxy)propyltrimethoxysilane (MAPTES) in a mass ratio of 3/1 in the presence of catalytic amounts of azobisisobutyronitrile (AIBN). Because of their good solubility and permeability, the HEMA/MAPTES precursors evenly penetrate the poplar cell wall. The impregnated samples were heated at 75°C for 8 h, followed by a heating period at 103±2°C for 8 h, in the course of which an in situ polymerization occurred in the cell wall. The modified wood was characterized by Fourier transform infrared (FTIR) and Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Moreover, the dimensional stability of the modified wood was measured and found to be considerably improved.
研究领域:
材料科学
·
木材科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 18
·9131-9137
·
IF 5.968
Mimi Tao,Fu Liu,Lixin Xue
A method of obtaining a hydrophilic and antifouling poly(vinylidene fluoride) (PVDF) membrane is developed via in situ polymerisation of 2-hydroxyethyl methacrylate (HEMA) in PVDF solution and subsequent micro-phase separation. The immobilization of PHEMA in a PVDF membrane was verified by Fourier Transform Infrared Spectroscopy (FTIR) and 1H Nuclear Magnetic Resonance Spectroscopy (1H-NMR). X-ray Photoelectron Spectroscopy (XPS) studies further unveiled the enrichment of PHEMA on the PVDF membrane surfaces. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) images revealed that the modified membrane had a fibrous-like microstructure in the cross section and a porous top surface. Water contact angle measurement suggested that the modified membrane formed by in situ polymerisation and micro-phase separation possessed higher hydrophilicity than the control membrane formed by blending PVDF and pre-polymerised PHEMA. The protein fouling of the modified membrane was considerably alleviated and the dried membrane showed spontaneous wettability and excellent permeability. Based on Wide-Angle X-ray Diffraction (WAXD) and the above results, a possible membrane formation mechanism for the in situ polymerisation and subsequent micro-phase separation was proposed.
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 BIOMATERIALS SCIENCE-POLYMER EDITION
·
2017
·
IF 1.9
Jinku Xu,Peili Zhao,Yongchun Zhang
Swollen hydrogels with extended iodine release kinetics is highly desirable for burn and scald treatment. In this paper semi-interpenetrating poly (HEMA–PVP) hydrogels were prepared by radical polymerization followed by thermo-treatment to crosslink its PVP component. Incorporation of PVP component endows the hydrogels responsive to loaded iodine undergoing a reversible shrunken/swollen volume transition. This resulted in a self-regulating iodine release model, in which shrunken hydrogel at high iodine loading decreased drug diffusion thereby reducing burst release, and then gradually swollen hydrogel as drug release ensures rapid release of dissociated drug from strong affinity sites on hydrogel backbone, achieving a burst-free extended release. The hydrogels demonstrated 11.5-fold higher iodine loading than pure pHEMA hydrogel and showed a highest 40% volume shrink. Initial burst release of iodine was efficiently decreased from 12,894 μg/day of pure pHEMA hydrogel to 2570 μg/day of pHEMA/PVP hydrogel with 37% PVP content. Iodine-loaded hydrogels showed zero-order release at three time periods of 0–15 h, 15 h–3.5 days and 3.5–23.5 days corresponding to release rate of 2570, 776 and 493 μg/day. The work gained a new insight into swollen hydrogel drug delivery system with burst-free extended drug release kinetics.
研究领域:
材料科学
·
药学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 40
·19032-19042
·
IF 3.591
Chengmin Hou,Hanxiao Ma,Congjun Cao,Xiaojian Ding,Jingting Duan
The composite particles (St/Fe3O4) of starch and Fe3O4 were prepared by a co-precipitation method. Then AA and HEMA were grafted and cross-linked on St/Fe3O4 by a one-step method to obtain St/Fe3O4-g-p(AA-r-HEMA). The effects of the adsorbent dosage, pH value, initial Cu(II) concentration, time and temperature on adsorption were studied. Experiments showed that St/Fe3O4-g-p(AA-r-HEMA) showed a good adsorption performance for Cu(II), with a unit adsorption capacity of 75.5 mg g−1 and a maximum removal rate of 95.0%. The adsorption process followed the Langmuir model and the pseudo-second-order kinetic model, was dominated by chemical adsorption, and belonged to single-layer adsorption. Renewable performance studies showed that after 8 adsorption cycles, 91.2% of the first adsorption effect was still retained.
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
POLYMER BULLETIN
·
2024
·
IF 3.1
Zhang Beibei,Zhang Lihua,Li Jin,Qiang Qi
Carbon emission reduction has been accepted as a common concern all over the world. Currently, CO 2 emission is mainly derived from the consumption of fossil fuels. To solve this issue, there is an urgent need to develop technologies for CO 2 capture. The utilization of membrane technology to remove CO 2 from a mixture gas attracts great interest. In the present work, poly(2-hydroxyethyl methacrylate- co -vinylamine) was synthesized by polymerization ( n -vinyl formamide and 2-hydroxyethyl methacrylate), hydrolysis, and ion exchange. The surface function of graphene oxide was carried out by aerobic self-polymerization of dopamine. The mixed matrix membranes were fabricated by adding the nanofiller (before and after modification) into the polymeric matrix. The membrane properties and its structure were characterized by FTIR, TGA, XRD, and SEM. The effect of nanofiller content and operation conditions on membrane performance was investigated. Results showed that the additions of nanofiller could decrease the crystallization of these membranes and effectively improve gas permeance. Remarkably, for the addition of 2.0 wt% dopamine-modified graphene oxide, the CO 2 permeance of the membrane was increased by 30.9% while achieving a CO 2 /N 2 selectivity of 83.5. The CO 2 permeation for CO 2 /CH 4 was also increased by 16.77%. These were surpassed over the 2008 Robeson’s upper bound. These resultant membranes demonstrated attractive potential for low-pressure post-combustion CO 2 capture. Besides, the stability of longtime tests on membranes was studied, and it was observed that membranes exhibited excellent stabilization with continuously operated for 220 h. The excellent properties of these membranes provide new opportunities for gas separation applications.
研究领域:
材料科学
·
环境科学
✓ 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）