RSC Advances
·
2023
·Vol. 13
·期 17
·11530-11536
·
IF 3.9
Bin Li,Aolin Wu,Wenrui Hao,Jizhen Liu,Zhigang Hu,Ying Wang
Deep eutectic solvent (DES) was synthesized from urea (U), acrylamide (AM) and choline chloride (ChCl), sodium alginate (SA) was selected as filler, and SA/P(U-AM-ChCl) composite hydrogel was prepared by thermal initiation frontal polymerization (FP). The hydrogels were characterised by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effects of SA on the swelling properties, mechanical properties and self-healing properties of the composite hydrogels were investigated. The results show that the swelling properties of the composite hydrogel with the addition of SA are greatly enhanced due to the large number of hydroxyl groups contained in the SA chain. The tensile strength of the hydrogel gradually increased with increasing SA content, with the maximum tensile strength increasing by a factor of 2.89. The self-healing efficiency of the composite hydrogel gradually increased with the increase of SA, and the healing rate of FP5 reached 94.4% after 48 h of healing. This study provides a simple and rapid method for the preparation of composite hydrogels with good mechanical properties and self-healing properties.
研究领域:
材料科学
·
高分子化学
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DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 5
·2993-2999
·
IF 3.9
Bin Li,Haiying Liu,Mengjing Zhou,Aolin Wu,Wenrui Hao,YaJun Jiang,Zhigang Hu
Deep eutectic solvents (DES) were prepared using urea (U) and acrylamide (AM) as hydrogen bond donors (HBD) and choline chloride (ChCl) as hydrogen bond acceptor (HBA), and polyethylene glycol (PEG) was selected as a filler and uniformly dispersed in DES to prepare PEG/P(U-AM-ChCl) composite hydrogels by light polymerization. The composite hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effects of the content of PEG on the swelling properties, mechanical properties and fatigue resistance of the composite hydrogels were investigated. The results showed that the compressive strength and fatigue strength of the composite hydrogels were gradually enhanced with the increase of the PEG content in the composite hydrogels, in which the maximum compressive strength of the hydrogels with 1 wt% PEG added was increased by 1.86 times. The composite hydrogel had excellent swelling properties, and the equilibrium swelling degree of the hydrogel with 1 wt% PEG added reached 10.15. Meanwhile, the PEG/P(U-AM-ChCl) composite hydrogel had excellent self-healing properties, and the self-healing rate of the composite hydrogel with a PFG content of 1 wt% could reach 91.93% after 48 hours of healing. This study provides a convenient and efficient method to prepare composite hydrogels with superior swelling properties and self-healing properties.
研究领域:
材料科学
·
生物医学工程
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Yongjun Sun,Shengbao Zhou,Wenquan Sun,Sichen Zhu,Huaili Zheng
In order to effectively remove the dissolved heavy metals and the heavy metals on the colloidal particles during the flocculation process, a novel dual-functional chitosan flocculant CMCTS-g-P(AM-CA) is prepared by ultraviolet light-initiated graft polymerization using CMCTS, AM, and ammonium dithiocarbamate. The main influencing factors of monomer concentration, monomer ratio, pH value, photoinitiator concentration, and illumination time are investigated on the basis of intrinsic viscosity, grafting rate, and grafting efficiency of CMCTS-g-P(AM-CA). Characterization results provided empirical evidence for existence of chelating groups. In addition, CMCTS-g-P(AM-CA) was applied to treat the simulated heavy metals and electroplating wastewater. The effect of CMCTS-g-P(AM-CA) dosage, pH value, and reaction G value on flocculation efficiency was also explored. After the two-stage flocculation, the residual concentration of Ni(II), COD, and turbidity of actual electroplating wastewater decreased to 0.96 mg/L, 93.00 mg/L, and 1.71 NTU after flocculation tests at optimal condition, respectively. Finally, the “3E” triangular evaluation model is established and applied to evaluate the flocculation performance of CMCTS-g-P(AM-CA) on the actual heavy metal wastewater further, thereby proving its excellent chelation flocculation performance.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Onome Ejeromedoghene,Olayinka Oderinde,Sheriff Adewuyi,Guodong Fu
Recently, the fabrication of functional and stimuli-responsive hydrogels using deep eutectic solvent derivatives is gaining tremendous scientific recognition owing to their unique self-switching properties. In this study, perfluorinated deep eutectic mixtures were prepared as the template for the synthesis of WO 3 /MoO 3 composites. The metal oxide-based composites were further employed as a chemical crosslinking agent for the polymerization of polyvinyl pyrrolidine (PVP) and acrylamide (Am), for the construction of (PVP-Am)/WO 3 /MoO 3 hydrogel composites. The hydrogels displayed unique morphologies and mechanical properties . The hydrophilic nature of hydrogels as well as the high concentration of dispersed WO 3 /MoO 3 composites in the polymer network contributes to their photochromic activity and allows an immediate coloration upon exposure to light at a short time. Howbeit, the low concentration of the dispersed WO 3 /MoO 3 composites in the dry glass membrane is responsible for the blue coloration and an extended time of photochromic response. In addition, the electrochromic behavior of the hydrogel composites displayed a strong quasi-rectangular shape potential window as well as a well-defined redox cyclic voltammetry curve when exposed to high voltage. This could be due to the photoredox property of the WO 3 /MoO 3 composites responsible for charge transfer between the different oxidation states.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 42
·33083-33088
·
IF 3.84
He Liu,Chunming Xiong,Zhen Tao,Yujiao Fan,Xiaofen Tang,Haiyang Yang
Self-healing systems that can spontaneously repair their damage would significantly improve the safety and prolong the lifetime of man-made materials. As external energy or healing agents are required in most of the self-healing approaches, non-covalently cross-linked polymeric hydrogels with intrinsic healing nature have attracted much attention recently. We present here a P(AM-co-DMAPS) zwitterionic copolymer based self-healing hydrogel, where AM and DMAPS are acrylamide and 3-((2-(methacryloyloxy)ethyl)dimethylammonio)propane-1-sulfonate, respectively. The electrostatic interactions within DMAPS and hydrogen bonding between AM moieties contribute to the physical cross-linking of the polymer chains and self-healing ability of the hydrogel. The reported strategy represents a general and facile route to construct zwitterionic copolymer based self-healable functional hydrogels for potential applications in the field of enhanced oil recovery (EOR).
研究领域:
材料科学
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聚合物化学
·
自修复材料
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高影响因子
MACROMOLECULAR BIOSCIENCE
·
2023
·Vol. 23
·期 10
·2300099
·
IF 4.6
Qi Yang,Qiang Zhou,Ziyi Guo,Lina Song,Fandong Meng,Zheming Tong,Xiaoli Zhan,Quan Liu,Yongyuan Ren,Qinghua Zhang
During the COVID-19 (Corona Virus Disease 2019) pandemic, traditional medical goggles are not only easy to attach bacteria and viruses in long-term exposure, but easy to fogged up, which increases the risk of infection and affects productivity. Bacterial adhesion and fog can be significantly inhibited through the hydrogel coatings, owing to super hydrophilic properties. On the one hand, hydrogel coatings are easy to absorb water and swell in wet environment, resulting in reduced mechanical properties, even peeling off. On the other hand, the hydrogel coatings don't have intrinsic antibacterial properties, which still poses a potential risk of bacterial transmission. Herein, an anti-swelling and antibacterial hydrogel coating is synthesized by 2-hydroxyethyl methacrylate (HEMA), acrylamide (AM), dimethylaminoethyl acrylate bromoethane (IL-Br), and poly(sodium-p-styrenesulfonate) (PSS). Due to the self-driven entropy reduction effect of polycation and polyanion, an ion cross-linking network is formed, which endows the hydrogel coating with excellent antiswelling performance. Moreover, because of the synergistic effect of highly hydrated surfaces and the active bactericidal effect from quaternary ammonium cations, the hydrogel coating exhibits outstanding antifouling performances. This work develops a facile strategy to fabricate anti-swelling, antifouling, and antifogging hydrogel coatings for the protection of medical goggles, and also for biomedical and marine antifouling fields.
研究领域:
材料科学
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生物医学工程
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化学工程
·
医疗器械
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Zhibo Zhou,Yunqing Gu,Yun Ren,Zhou Li,Denghao Wu,Zhenxing Wu,Chengqi Mou
P(NIPAM-AM)/CS/TA-Fe 3+ hydrogel integrates NIR actuation and self-sensing. • Optimized network enables a 4.7 s fast response and 104° maximum bending. • TA-Fe 3+ coordination offers a high photothermal conversion efficiency of 27.76%. • Linear resistance-strain mapping predicts bending angles with ≤ 2.67% error. • The dual-function material allows real-time feedback for closed-loop control. Conventional hydrogel actuators often suffer from single functionality and a lack of real-time state feedback, restricting their potential in closed-loop control and intelligent applications. To address this, we designed a synergistically crosslinked composite hydrogel based on poly(N-isopropylacrylamide-co-acrylamide) (P(NIPAM-AM)), tannic acid-iron ion (TA-Fe 3+ ) complexes, and chitosan (CS). This hydrogel integrates near‑infrared (NIR)‑driven actuation with resistive self‑sensing and exhibits excellent shape programming and multidirectional actuation capabilities. By systematically optimizing the composition, the hydrogel with 0.1 mL of CS solution achieves a rapid response time of only 4.7 s and a maximum bending angle of 104°. Furthermore, at an Fe 3+ content of 120 mg, the hydrogel demonstrates a high photothermal conversion efficiency of 27.76% and an initial conductivity of 2.549 (Ω·m) −1 . It exhibits excellent self-sensing characteristics, with a bending gauge factor of 0.019 and high angle-sensing accuracy with an error of ≤ 2.67%. This work provides a simple and efficient strategy for developing intelligent soft materials that integrate actuation and sensing. Download: Download high-res image (220KB) Download: Download full-size image
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DOI
高影响因子
RARE METALS
·
2026
·Vol. 45
·期 5
·e70300
·
IF 12.1
Hui Liu,Hongli Jia,Xiaojin Yan,Rouling Chen,Yingying Wang,Kun Chen
en This link goes to a English section zh This link goes to a Chinese section Thermo-responsive hydrogels based on poly(N-isopropylacrylamide) (PNIPAM) are promising candidates for soft actuation, yet their practical applications are often constrained by sluggish thermo-responsive kinetics and insufficient mechanical robustness. Herein, phosphotungstic acid (PTA), a tungsten-containing polyoxometalate, was incorporated to regulate the phase transition behavior and modulate a PNIPAM/P(AA- co -AM) bilayer hydrogel, in which the thermo-responsive PNIPAM layer serves as the actuator whereas the non-thermo-responsive P(AA- co -AM) layer provides mechanical support. By increasing the PTA content up to 4 wt%, the thermally induced deformation time of the PNIPAM layer was prolonged from 30 to 120 s, whereas the recovery time at low temperature was shortened from 120 to 60 min, thereby enabling programmable thermo-responsive kinetics. The thermal transition of the PTA-PNIPAM layer was effectively regulated by PTA, with the lower critical solution temperature (LCST) gradually increasing and tunable up to 42°C, accompanied by an improved thermal stability manifested by reduced mass loss at 150°C. Mechanical characterization demonstrated that the P(AA- co -AM) layer modulated the tensile properties of hydrogel networks, and the bilayer configuration significantly outperformed the pristine PNIPAM hydrogel. Benefiting from the synergistic effects of kinetic regulation and mechanical modulation, the bilayer hydrogel further exhibited multi-substrate adhesion and reversible deformation, enabling an underwater gripping demonstration. This work highlights a polyoxometalate-enabled strategy for simultaneously controlling thermo-responsive kinetics and toughening PNIPAM-based hydrogels, thereby advancing functional soft materials for actuation-related applications. 摘要 en This link goes to a English section zh This link goes to a Chinese section 聚(N-异丙基丙烯酰胺)(PNIPAM)的温敏水凝胶是软体动力领域的有力候选材料,但其迟缓的热响应动力学和有限的机械鲁棒性往往限制了其实际应用。在此,我们在PNIPAM/P(AA- co -AM)双层水凝胶中引入了磷钨酸(PTA),以调控其相变行为并增强材料性能。在该双层结构中,温敏性PNIPAM层作为动力层,而非温敏性P(AA- co -AM)层则提供机械支撑。通过将PTA的含量提高至4 wt%,PNIPAM层的热诱导变形时间从30秒延长至120秒,而在低温下的恢复时间则从120分钟缩短至60分钟,从而实现了可编程的热响应动力学。PTA有效调控了PTA-PNIPAM层的热转变行为,使其低临界溶解温度(LCST)逐渐升高且最高可调至42°C。同时,材料的热稳定性也得到提升,150°C时的质量损失明显减少。力学表征表明,P(AA- co -AM)层调节了水凝胶网络的拉伸性能,且该双层结构的性能显著优于原始PNIPAM水凝胶。得益于动力学调控与机械增韧的协同效应,该双层水凝胶进一步展现出多基底黏附性和可逆变形能力,并成功实现了水下抓取演示。本工作提出了一种基于多金属氧酸盐的水凝胶改性策略,可同时控制PNIPAM基水凝胶的热响应动力学并增强其韧性,从而推动了功能性软材料在相关应用中的发展。
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 1
·121114
·
IF 7.2
Qing Wang,Lin Deng,Changbo Zhang,Rajendra Prasad Singh,Gongde Wu
Para-nitrophenol (PNP), a highly toxic compound widely detected in water bodies, was investigated as the target contaminant during the UV/chlor(am)ine/Fe(III) processes to evaluate its degradation kinetics model, and disinfection byproducts (DBPs) formation and pathways. The incorporation of Fe(III) introduced a oxidation-reduction cycle of Fe(II) and Fe(III), which can generate additional hydroxyl radicals, reactive chlorine species, and reactive nitrogen species, thereby accelerating PNP degradation by 21.85 % in the UV/chlorine system and 31.08 % in the UV/chloramine system. PNP degradation followed pseudo-first-order kinetics, with observed rate constants ( k obs ) calculated as 0.0938 and 0.0604 min −1 , in the UV/chlorine/Fe(III) and UV/chloramine/Fe(III) systems, respectively. Radical quenching experiments confirmed the dominant reactive species in each system, supporting the mechanistic interpretation. In the UV/chlorine/Fe(III) system, DBP yields ranked as follows: Halonitromethanes (HNMs) > trihalomethanes (THMs) > haloacetamides (HAcAms) > haloacetonitriles (HANs), while the order was HNMs > THMs > HANs > HAcAms, in the UV/chloramine/Fe(III) system. Factors influencing DBP formation, including Fe(III) dosage, initial pH, and chlor(am)ine dosage, were systematically investigated. The cytotoxicity index (CTI) contributions of each DBP in the UV/chlor(am)ine/Fe(III) systems were ranked as follows: HNMs > HANs > THMs > HAcAms. Based on detected transformation products (TPs) and radical contribution analysis, plausible pathways for PNP transformation and DBPs formation were proposed. These findings provide valuable insights into PNP degradation behavior and the mechanisms of DBPs formation in the UV/chlor(am)ine/Fe(III) systems, supporting their future practical applications.
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高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2015
·
IF 0.961
Yihang Zhou,Weilan Xue,Zuoxiang Zeng,Wanyu Zhu,Zhelong Li
A new amine-terminated nylon 6/66/1010 (AM-6/66/1010) copolyamide hot melt adhesive with the molecular weight of 21,000–96,000 Da was synthesized and blocked with 1-hexadecylamine. The AM-6/66/1010 samples were characterized by 1H-NMR spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis, and gel permeation chromatography. The 1H-NMR spectroscopy demonstrated that 1-hexadecylamine functions as blocking agent in this polymerization. The DSC thermograms showed that the extra peak (peak (II)) and the melting peak (peak (I)) of AM-6/66/1010 are moving left and the glass transition temperature of AM-6/66/1010 decreases as the mole ratio αH/C (1-hexadecylamine/total carboxyl) increases. The thermal gravimetric analysis indicated that AM-6/66/1010 hot melt adhesive has a high thermal stability. The peel strength of the test specimen obtained by hot melt glutinous lining of AM-6/66/1010 or AC-6/66/1010 and fabric 6535 (65% PET, 35% cotton) was studied using T-peel tests, and the results showed that the washable and dry-cleaning resistant of AM-6/66/1010 copolyamide hot melt adhesive is better than that of carboxyl-terminated nylon 6/66/1010 (AC-6/66/1010) copolyamide hot melt adhesive.
研究领域:
高分子化学
·
材料科学
·
胶粘剂与密封材料
·
热分析
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 315
·期 1
·103-110
·
IF 1.282
Wang Zhongtang,Lin Jinxian,Li Sixuan,Guo Qiuju,Huang Wenna,Wen Wei,Dan Guiping,Tan Zhaoyi
To rapidly assess the contamination of actinides in emergency water, a method was developed to simultaneously analyze U, Th, Pu and Am. The method consists of two steps: extraction chromatographic separation using UTEVA and DGA resins and isotopic determination of actinides by inductively coupled plasma mass spectrometry (ICPMS). The whole analytical procedure takes only 8 h and high chemical recoveries of actinides were obtained. The cross spectral interferences between actinides in ICPMS measurement were sufficiently removed. The accuracy was validated by analyzing IAEA-443 seawater sample. The low limits of detection of actinides allow this method to distinguish low level contamination.
研究领域:
环境科学
·
核化学
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DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2021
·
IF 2.646
Shan Wang,Zhicun Wang,Cheng Xu,Lin Cui,Guihua Meng,Shengchao Yang,Jianning Wu,Zhiyong Liu,Xuhong Guo
Wound infection and poor wound healing are the major challenges of wound treatment. Antibiotic drug treatment is the effective way to inhibit wound infection. It is necessary to achieve sustained release of antibiotics to get a longer treatment for wound infection. The double network hydrogels based on liposome, polyethylene glycol (PEG), α- cyclodextrin (α-CD) and acrylamide (AM) were developed, in which liposome acts as amoxicillin repository. Because the drug would release from the multiple barriers including two cavities of liposome and α-CD, as well as polyethylene glycol -α- cyclodextrin/acrylamide (PEG-CD/AM) double network, the PEG-α-CD/AM/liposome @amoxicillin double network hydrogels could achieve sustained drug release. The drug release assay showed that the dressing could release amoxicillin continuously until 12 days, than that of 8th day for single-network hydrogel releasing. The antibacterial ratio of the hydrogel could reach above 80%. What’s more, the hydrogels present adjustable mechanical strength by changing the ratio of the components. The swelling ratio proved that the hydrogel had potential ability to absorb wound exudates. The cytotoxicity test of the hydrogels demonstrated excellent biocompatibility. These results indicated that this study can provide a new thought for antibacterial wound dressing and has a broad application prospect.
研究领域:
生物材料
·
药剂学
·
伤口护理
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）