MACROMOLECULAR MATERIALS AND ENGINEERING
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2018
·Vol. 303
·期 12
·1800505
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IF 2.69
Yulin Zhang,Ran An,Linglin Han,Xiangdong Wang,Lingying Shi,Rong Ran
In this paper, a series of physical hydrogels with semi-interpenetrating polymer network (IPN) structures are first synthesized via micellar copolymerization. The semi-IPN gels exhibit high strength, pH responsiveness, and self-healing properties. Then, a series of physical double-network (PDN) gels are further prepared by immersing the as-prepared semi-IPN gels in the solutions containing Ca 2+ or Fe 3+ , respectively. The strengths and moduli of these PDN hydrogels are much higher than that of the semi-IPN gels. Accordingly, the mechanical properties and swelling ratio of PDN gels can be tuned by changing the SA content and the types of metal ions in the immersing treatment. Based on the excellent self-healing ability of the semi-IPN gels, the double-layer hydrogel actuators with shape-memory properties are successfully fabricated through a simple healing-immersing treatment, which has great potential application prospects in actuators, artificial muscles, and soft robots.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 28
·23233-23241
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IF 3.289
Jun Wan,Tao Tao,Yong Zhang,Xiangmin Liang,Aijiao Zhou,Chang Zhu
Adsorption has attracted much attention for its effectiveness, low cost and the possibility of regeneration among many phosphorus removal methods. In this study, a novel interpenetrating network (IPN) structural hydrogel based on N-isopropylacrylamide and aluminum alginate was synthesized and applied for phosphate adsorption. SEM, FTIR and XPS were applied to characterize the poly N-isopropylacrylamide/aluminum alginate (PNIPAM/AA) IPN hydrogel beads before and after adsorption. It was found that the maximum adsorption capacity was reached at pH = 3, adsorption capacity decreased with adsorbent dosage increasing, and SO42− had much more negative effects on phosphate adsorption compared with Cl− and NO3−. A pseudo-second-order kinetic model and intra-particle kinetic model fitted well with the experimental data, indicating chemical adsorption and intra-particle diffusion was the rate-controlling step of phosphate adsorption. Moreover, equilibrium isotherm experimental data were well described by the Freundlich and Slips model, suggesting heterogeneous multilayer adsorption was dominant during adsorption process. The regeneration study indicated that the adsorption capacity of adsorbent remained at a relatively high level after five times of regeneration. Column adsorption and regeneration results showed PNIPAM/AA hydrogels had strong phosphate adsorption capacity and had potential in large scale application. Hence, PNIPAM/AA hydrogel beads could be a promising adsorbent for phosphate recycle in the future.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 36
·16679-16688
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IF 3.591
Lijuan Zhang,Dongqing Zhao,Yao Lu,Jinghan Chen,Haotian Li,Jinghan Xie,Yue Xu,Haikuan Yuan,Xijian Liu,Xueyan Zhu,Jie Lu
A highly efficient strategy was developed to fabricate a graphene oxide modified cellulose nanocrystal/PNIPAAm IPN (GO-CNC/PNIPAAm IPN) hydrogel, which was capable of effectively adsorbing cationic and anionic dyes. The adsorption of Congo red (CR) and methylene blue (MB) was investigated based on the effects of pH, adsorption isotherms, adsorption kinetics, and recycling experiments. The adsorption capacities for CR and MB of the GO-CNC/PNIPAAm IPN hydrogel adsorbent were 728.8 mg g−1 and 281.9 mg g−1, respectively, and the difference is due to complex electrostatic and chemisorption effects between the adsorbent and the dye, which could be explained using the Langmuir isotherm adsorption model and pseudo-second-order kinetics model. In addition, the GO-CNC/PNIPAAm IPN hydrogel could be used repeatedly, and the adsorption capacities for CR and MB were 84.9% and 82.4% of the original hydrogel after five re-adsorption experiments, respectively. This type of adsorbent provided the advantages of being low-cost, having simple preparation, being non-polluting, and having good adsorption effects and a long service life, which is promising for its use in dye wastewater treatment in the future.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Xiaoqiang Fan,Xun Wang,Han Yan,Meng Cai,Wensheng Zhong,Hao Li,Minhao Zhu
Interpenetrating network polymers (IPN) have broad development prospects because of achieving the expected performance characteristics via the selection of functional groups and the ratio of components. In this work, the as-prepared waterborne fluorinated polyacrylate (F-PA) complex latex particles using emulsion polymerization were introduced into waterborne epoxy resin (EP) coatings for improving its hydrophobicity , toughness and compactness. The structure and physicochemical properties of prepared samples were characterized by TEM , SEM , XPS, FTIR and DMA techniques. The results indicate that EP/F-PA with a dense IPN structure successfully solves poor compatibility between F-PA and EP, which leads to excellent mechanical and damping properties. Both increased by 33.2% and 26.8% respectively. The friction test shown that the negative volume was reduced by 50.6%, the composite coating displayed excellent wear resistance. In addition, the fluorinated components and IPN structure increase the diffusion path of the corrosive medium, which has been demonstrated by molecular dynamics simulations , providing outstanding corrosion resistance for coatings. The |Z| 0.01 Hz of composite coating had increased by 3.4 times. Novel composite coating with an IPN structure can offer a feasible strategy for the development and real-world application of multifunctional coatings .
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Xueyu Yuan,Jing Jiang,Zihao Zhou,Hongyu Pan,Chengwei Wang,Chor Yong Tay,Jinhua Hu,Li Liu,Bing Li,Yufeng Cai,Ming Liu
The designed thermally responsive polyionic liquid (TPIL)/ poly (diallyl dimethylammonium chloride) (PDDA) hydrogel with a semi-interpenetrating (semi-IPN) structure, containing highly charged chloride anions, was fabricated to explore the comprehensive capabilities of solar driven membrane-free osmotic desalination. Introducing linear PDDA polyelectrolyte with higher charge density has effectively excluded salt ions from entering the TPIL hydrogel matrix due to the strong charge concentration gradient established between the hydrogel and the saline reservoir. Meanwhile, the thermo-sensitivity of the polyionic liquid/PDDA semi-IPN (PNCl) hydrogel enabled the release of absorbed salt-depleted water at a temperature above the Lower Critical Solution Temperature (LCST). The multiple purification process established by partial submersion of PNCl hydrogel in saline enabled continual reduction of the salt ion concentration during the upwards transportation of water along the polyelectrolyte network. Moreover, a mushroom-shaped hydrogel demonstrated enhanced the effectiveness in long-term cyclic desalination. The “mushroom cap” was loaded with photo-thermal conversion fillers (Ti 3 C 2 T x MXene) to achieve higher photo-thermal conversion efficiency for water recovery. A record high salt rejection rate of more than 93% was obtained for membrane-free osmotic desalination. More importantly the whole desalination/water absorption/release process was solely supported by gently heating the PNCl hydrogel under the illumination of renewable solar energy.
研究领域:
材料科学
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环境工程
·
水处理
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Rongxing Tang,Shuang Gao,Jiazi Hou
After suffering the COVID-19 viruliferous epidemic outbreak, wearing disposable protective masks has become an effective protective measure in our daily life. However, protection effectiveness of disposable protective masks will be greatly reduced or even lost once overstep their service life span. Thus, developing a strategy that can identify the remaining service life of masks by naked eyes becomes desirable. Here, we prepared a gradient transparent membrane as a view layer of masks by electrospinning the semi-interpenetration PVA/PVME membrane (semi-IPNM) which rapid responded to the respiration moisture. Based on the Darcy law by COMSOL software, with the increasing time of respiration simulation, the transparent area diffused from center to the edge of the membrane, like a progress bar revealing the remaining life of face mask. The resultant semi-IPNM exhibited excellent flexibility, nontoxicity, high tensile strength (34.5 MPa) and reliable filtration efficiency (greater than92%) even through 6 h using. Meanwhile, the pressure drop of semi-IPNM became higher after 6 h using, which was not meet up with human needs that indicated the disposable face mask should be discarded according to WS/T 311–2009 technical specification. Therefore, a view layer of face masks built by this strategy possesses a real-time service life management and an effective respiratory protection.
研究领域:
材料科学
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医学工程
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
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2023
·
IF 6
Xiang Wang,Tianwen Dai,Zhixi Zhao,Xinyue Jiang,Chuxiang Zhou,Huawei Zou,Pengbo Liu
Polyacrylamide (PAM) hydrogel is easy to prepare and has been widely used in industrial and biomedical fields. But its mechanical properties and environmental adaptability are very poor. In this work, by introducing carboxymethyl cellulose (CMC) into the PAM crosslink network, a semi-interpenetrating (semi-IPN) network structure was constructed to improve the mechanical properties of PAM hydrogels. PAM/CMC hydrogel microspheres (HMPs) with semi-IPN structure were successfully prepared by in-situ precipitation droplet crosslinking polymerization (PDIC). On this basis, a double locking water strategy was proposed and achieved: firstly, lithium chloride (LiCl) was introduced into PAM/CMC hydrogel to retain the internal water; secondly, the PAM/CMC HMPs were coated with single layer graphene oxide (GO) to restrain the loss of free water on the HMPs surfaces. The morphology, the state of water in HMPs, the compression performance, phase transition behavior and heat transfer performance of the GO coated PAM/CMC/LiCl HMPs (GO@HMPs) were further studied. The experimental results showed that the CMC could effectively improve the compression performance of PAM HMPs, and the PAM/CMC HMPs had also good compression recovery performance. The anti-dehydration performance of PAM/CMC HMPs was effectively improved by the double locking water strategy. The latent heat of GO@HMPs was higher than that of the current commercial phase change microsphere materials. The GO@HMPs had excellent heat absorption ability and were expected to be used in infrared stealth and thermal camouflage fields.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Xiaoyan Li,Ailin Wei,Haosen Zhao,Zhenfei Wang,Yang Lyu,Jie Nie,Yu Chen
Hydrogels possess inherent characteristics that render them promising for the prevention of peri-implantitis. Nonetheless, hydrogels with singular network structures are incapable of concurrently achieving the desired adhesion and mechanical properties. In this work, a carboxymethyl resistant starch/polyacrylic acid semi-interpenetrating (CMRS/PAA semi-IPN) hydrogel was successfully prepared in one step. Its morphology, structure, mechanical properties, and adhesion properties were systematically assessed, which revealed a homogeneously porous structure with a commendable mechanical strength of 67.317 kPa and an adhesion strength of 63 kPa. Ciprofloxacin (Cip) was loaded in the CMRS/PAA hydrogel via in situ compounding. The in vitro kinetic study of drug release shows that the slow drug release efficiency exceeds 90 % in the weakly acidic microenvironment at the infection site after 72 h, indicating enhanced antimicrobial properties. The Cip-loaded hydrogel also exhibits a remarkable bacterial inhibition rate exceeding 99 % against the pathogenic bacterium P. gingivalis and good cytocompatibility and hemocompatibility in vitro . In summary, the current work explored a novel solution and direction for the development of anti-infective medical materials applicable to dental implants .
研究领域:
材料科学
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生物医学工程
·
牙科学
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产品关联
DOI
PubMed
高影响因子
International Journal of Polymeric Materials and Polymeric Biomaterials
·
2017
·
IF 1.515
Yan-Ling Luo,Xue-Yin Zhang,Jing-Yu Fu,Feng Xu,Ya-Shao Chen
Novel poly(N-isopropylacrylamide)/carboxymethyl chitosan/multiwalled carbon nanotube semi-interpenetrating nanohybrid hydrogels were prepared, and the chemical structure and morphology were characterized. The prepared hydrogels showed temperature and pH dual-responsiveness, and the one containing multiwalled carbon nanotubes (MWCNTs)–COOH possessed high maximal swelling ratios. The phase transition produced at pH of 6.8–7.4 and temperature of 35–40°C, hinging on the system compositions and charge ratios. The hydrogels were used to load hydrophilic anticancer drug, with high entrapped efficiency of about 44%. The drug release changed with temperature, pH, and MWCNTs–COOH contents. The designed hydrogels can be used for site-specific target delivery of protein or hydrophilic anticancer drug.
研究领域:
材料科学
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生物医药工程
·
药剂学
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DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2012
·
IF 0.887
Dajian Huang,Wenbo Wang,Yuru Kang,Aiqin Wang
A series of granular pH-sensitive semi-interpenetrating polymer network (semi-IPN) hydrogels based on chitosan (CTS), acrylic acid (AA) and gelatine (GE) were utilized for the adsorption and recycle of Pb(II) from aqueous solutions. The composite hydrogels have been characterized by FT-IR and TGA. The effects of contact time, pH value and initial Pb(II) concentration on the adsorption were investigated. Results indicated that the adsorption capacity of the hydrogel increased with increasing pH value and initial Pb(II) concentration, and a pH-sensitive adsorption characteristic was presented. The adsorption rate of the semi-IPN hydrogels on Pb(II) is fast with an adsorption rate constant of 14.9790 mg/(g·s), and adsorption equilibrium could be reached within 10 min. The adsorption isotherms of the hydrogels for Pb(II) could be described well by the Langmuir equation, rather than the Freundlich equation. The as-prepared hydrogels showed good reusability with 0.05 mol/l HNO3 solutions as the desorbing agent and 0.1 mol/l NaOH solutions as the regeneration agent, respectively. After five consecutive adsorption-desorption processes, the semi-IPN hydrogel with 20 wt% GE may reach 85.26% of its initial adsorption capacity. In addition, the adsorbed Pb(II) can be quantitatively recovered by simply eluting the hydrogel with dilute HNO3 solution, and a recovery ratio of 89.27% was reached for the semi-IPN hydrogel. The satisfactory adsorption amount is mainly derived from the chelating of functional groups (i.e. –COO− and –NH2) with Pb(II) ions. The hydrogel adsorbents exhibited excellent affinity for Pb(II), and can be applied to treat wastewater containing heavy metal ion and simultaneously recover the valuable metal sources.
研究领域:
环境科学
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材料科学
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水处理
·
高分子化学
·
重金属修复
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Linlin Wang,Fenghua Zhang,Shanyi Du,Jinsong Leng
The cross-linking degree is a significant factor affecting the thermodynamic properties of resins, the cross-linking degree of photosensitive resins is limited during Digital Light Procession (DLP) printing. We present a strategy for double networks in epoxy resin to further improve the performances of printed structures via two different processing methods. Epoxy acrylates and polyethylene glycol dimethacrylates crosslink by UV-light radiation forming a light-induced network structure, and epoxy molecules crosslink under γ-ray radiation forming a ray-induced network structure. The two kinds of networks interpenetrate to form the interpenetrating polymer network (IPN). The printed IPN specimens have the characteristics of high Young’s modulus (up to 4.89 GPa) and fracture strain (as high as 30.4 %). The printed flowers and canister reinforced by short glass fibers (GFs) exhibited rapid shape recovery behaviors. The IPN epoxy/GFs composites have good values in manufacturing smart deployable structures , medical devices , and automobile shell parts.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yulu Zhang,Yang Yang,Yajiao Jiang,Xin Zhang,Haoyu Tan,Xiangguo Li,Zhen Xu,Juan Chen,Yingnan Ma
Hydrogel membranes exhibit promising proton conductivity, but their low mechanical strength and poor water retention ability limit their application in proton exchange membrane fields. In this work, the strategic integration of chitosan into the covalently cross-linked PEI network created a semi-interpenetrating network (semi-IPN) architecture where linear chitosan chains permeate the matrix through hydrogen bonding and electrostatic interactions, forming physical cross-links that impose topological constraints. Benefiting from the distinctive structural synergy between chitosan and the hydrogel matrix, the fabricated semi-IPN rigid hydrogel demonstrated exceptional tensile strength (7.8 MPa, representing a 172.57% improvement over chitosan-free counterparts), superior water retention capability (70.726% water retention rate at 12 h, doubling that of neat PEI hydrogel membranes), outstanding proton conductivity (165.7 mS/cm, 1.33 times higher than pristine hydrogels), and excellent electrical stability under elevated temperatures (88.6% conductivity retention at 80 °C after 720 min and 71.28% retention at 100 °C). We believe that the development of semi-IPN hydrogels in this work holds significant implications for advancing proton exchange membrane research, particularly in addressing critical challenges related to durability and proton transport efficiency.
研究领域:
材料科学
·
能源工程
·
化学工程
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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）