POLYMER SCIENCE SERIES A
·
2023
·Vol. 65
·期 4
·358-368
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IF 1
Tiantian Ren,Xu Yuanyuan,Wu Jianning,Meng Guihua,Yang Shengchao,Cui Lin,Liu Zhiyong,Guo Xuhong
Abstract Collecting water from the air could alleviate freshwater shortages in arid regions such as remote and inland areas. However, it is challenging to prepare adsorption materials that have high adsorption and desorption performance using straightforward synthesis routes for water harvesting applications. In this paper, a polydopamine (PDA)@Sodium polyacrylamide carboxymethyl cellulose (PAM-CMCNa)-calcium chloride (CaCl 2 ) composite aerogel (PDCA) with a vertical channel was prepared by salt template method and photopolymerization for atmospheric water collection (AWH). The designed vertical channel promotes the rapid transport of water molecules from the atmosphere to the interior of the hydrogel through capillary action. During this process, the hydrogel further expands to prevent the leakage of the internal salt solution, which effectively improves the water vapor adsorption and desorption by hydrogel. Experimental results showed that the hydrogel can absorb 2.78 g/g of water at 90% relative humidity (RH), where 56.3% of the captured water can be desorbed within 60 min of exposure under 1.0 sun light intensity. After 10 adsorption-desorption cycles, the PDCA still possesses excellent water sorption performance. The indoor water collection test showed that the water collection performance reached 2.143 kg/kg day at 90% RH and 25°C adsorption for 12 h and desorption for 6 h. The proposed method for the preparation of PDCA composites can achieve high water harvesting performance over a wide humidity range to enable solar-driven clean water production in remote areas.
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
RSC Advances
·
2021
·Vol. 11
·期 56
·35268-35273
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IF 3.361
Bin Li,Jizhen Liu,Dandan Fu,Yongjing Li,Xiaojia Xu,Ming Cheng
In this study, a simple and eco-friendly method was proposed to efficiently prepare nanocomposite hydrogels with excellent mechanical properties and satisfactory pH response behaviour by frontal polymerization (FP) of DEM in close to 4 minutes. Acrylamide (AM) and choline chloride (ChCl) were used as raw materials to synthesize deep eutectic monomers (DEMs). Nitrogen-doped carbon nanotubes were dispersed in DEMs as fillers, and poly(acrylamide)/nitrogen-doped carbon nanotube (PAM/N-CNT) nanocomposite hydrogels were prepared by FP. The non-covalent interactions between PAM hydrogels and N-CNTs was verified by Fourier infrared spectroscopy. The mechanical properties of PAM/N-CNT nanocomposite hydrogels were investigated, as well as the swelling and pH response properties. The results showed that the compressive strength of PAM hydrogels was significantly enhanced by the addition of N-CNTs due to the hydrophobic interaction of N-CNTs, which also causes sensitive response properties of the PAM hydrogels in acid solution.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
·Vol. 60
·期 40
·18933-18945
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IF 3.9
Liu Guiqun,Jiao Pengwei,Ma Qisheng,Li Ding,Wu Wenli,Xue Min,Zhang Xiaoli
Conducting polymer-based bioadhesive conductive interface (CP-BCI) are widely used in bioelectronics, strain sensors due to their ease of processing and fabrication, excellent electrical, and biocompatibility. However, CP-BCI is conventionally fabricated using techniques such as cast molding, screen printing, electrochemical patterning, and photolithography. These traditional methodologies often encounter challenges in achieving precise control and the generation of intricate patterns, thus limiting the widespread application and evolution of these materials. Direct ink writing has become an emerging research hotspot for processing CP-BCI due to its high degree of programmability, precision, and process stability. Herein, biointerface inks with enhanced electrical conductivity and high adhesion have been specifically developed for direct ink printing. The development of this novel ink involves the incorporation of PAM into the PVA matrix to promote composite cross-linking, coupled with the integration of PEDOT:PSS conductive nanofibers within the matrix, thereby yielding the PEDOT:PSS-PAM-PVA biointerface ink. The innovative ink showcases exceptional printability, high electrical conductivity (0.24 ± 0.053 S m −1 ), high adhesion (54 ± 2.7 kPa), and a well-balanced mechanical profile, featuring a maximum stress of 51 kPa and an elongation at break of 369%. This research introduces the novel direct writing ink, promoting advancements in the manufacturing of flexible electronics. Graphical abstract
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Bingxue Huang,Jie Liu,Jia Xie,Rui Tang,Hongyi Zhu,Biyou Peng,Wei Zhang
Photothermal 3D hydrogels have shown great potential for solar-driven desalination. In this study, an integrated 3D photothermal hydrogel evaporator was developed to enhance evaporation performance by leveraging a solar-induced environmental heat field and a concave evaporation surface. The photothermal hydrogel matrix was fabricated by incorporating sodium humate-based photothermal particles (synthesized through the chelation of sodium humate and Cu 2+ ) into a sodium alginate/polyacrylamide hydrogel network. The resulting 3D hydrogel evaporator, featuring a tree-ring structure, achieved a stable evaporation rate of 2.23 kg m −2 h −1 in deionized water for 3 h under one-sun irradiation and demonstrated robust performance in various water bodies, including strong brine and sewage. To further enhance energy input, a commercial photothermal enclosure was integrated to create a surrounding heat field under sunlight. By combining energy from the photothermal particles and the solar-induced heat field, the evaporator with a concave evaporation surface achieved an exceptional evaporation rate of 3.69 kg m −2 h −1 under one-sun irradiation, corresponding to a theoretical solar energy utilization efficiency of 193 %, representing a 65 % improvement compared to pre-integration levels. This work presents a novel strategy for designing high-efficiency solar evaporators, offering significant advancements in sustainable desalination technologies.
研究领域:
材料科学
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环境科学
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能源工程
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CONSTRUCTION AND BUILDING MATERIALS
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2024
·
IF 7.4
Qiang Cai,Qiang Yuan,Jiangfeng Long,Zixuan Sun,Kai Wu,Linglin Xu
The artificial aggregates prepared with high crystalline wet quarry sludge (WQS) by cold-bonded process suffer from low mechanical strength and poor solidification effect. Inspired by the shell, polymer chains were incorporated to enhance the connection among WQS particles. However, traditional polymer modification faces many limitations such as high cost and hydration inhibition. In this work, calcium oxide (CaO) and polyacrylamide (PAM) were co-used to address the above limitations and improve the properties of artificial aggregates. The compressive strength, hydration products and microstructure of modified WQS-aggregates were monitored. The main findings prove that the co-use of CaO and PAM effectively improves the mechanical performance of WQS-aggregates. The compressive strength of aggregates modified by CaO and PAM reach 11.85 MPa, exceeding the control by approximately 46.3 %. This approach mitigates issues like crack generation and poor cement hydration, which will occur when they are added separately. Through metal coordination and promoted carbonation behaviors, the introduction of CaO and PAM promotes the formation of a 3D organic-inorganic network and induces a denser microstructure. The porosities of aggregates reduce from 27.48 % to 24.83 %. The incorporation of CaO and PAM enhances the solidification of heavy metals. The prepared WQS-aggregates meet the requirements of environmental security. It is believed that this work will provide a new solution for the preparation of low carbon artificial construction products with low activity solid wastes.
研究领域:
建筑材料学
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环境工程
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固体废物处理
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Journal of the Iranian Chemical Society
·
2026
·Vol. 23
·期 9
·283
·
IF 2.4
Wu Rui,Tian Guanghui,Liu Cunfang,Li Yapeng
The controlled synthesis of hybrids nanoparticles (NPs) and polymer have received significant attention for application in environment. In the paper, green and multifunctional polymer-based Fe 3 O 4 /hydroxyapatite (HAp)/polyacrylic acid (PAA)/ polyacrylamide (PAM) nanohybrids with magnetism was fabricated by polymerization. The obtained materials (Fe 3 O 4 /HAp/PAA/PAM) was characterized by hysteresigraph, X-Ray diffractometer (XRD), infrared spectrometer (IR), energy dispersive spectroscopy (EDS), mapping, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). The decontaminating performance of the nanohybrids was evaluated by adsorption methylene blue (MB). Adsorption kinetics and adsorption isotherms were employed to examine the adsorption behavior. The results showed that the adsorption process fitted the Langmuir isotherm and pseudo-second-order kinetic model and Fe 3 O 4 /HAp/PAA/ PAM displayed appreciable adsorption efficiency. The adsorption mechanism was also presumed. The removal of dye mainly attributed to polymer with multifunctional groups and the special structure of HAp. Moreover, it is facile to retrieve due to the incorporation of Fe 3 O 4 with strong magnetism. It proposed a novel route to design and fabricate multifunctional nanohybrid adsorbent for removal of dye with high capacity.
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CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Qiang Zhang,Peiyuan Liu,Zhiwei Yang,Yanjun Liang,Jian Zhang,Lin Wang,Xiao Huang
The coproduction of freshwater and electricity through solar-driven interfacial evaporation presents a promising strategy to address the current water and energy shortages. However, achieving high evaporation rate, efficient pollutant degradation, and high electrical power output in an integrated system remains challenging. Herein, we report a multifunctional membrane evaporator based on Sb 2 Se 3 /MoSe 2 /Ag heterostructures embedded in a polyacrylamide (PAM) hydrogel (Sb 2 Se 3 /MoSe 2 /Ag@PAM) for simultaneous wastewater evaporation, decontamination and thermoelectric power generation. The porous PAM matrix provided hydrophilicity and low evaporation enthalpy, while the heterostructures synergistically enhanced light absorption, photocatalytic activity, and thermal localization. As a result, under 1.0 sun illumination, the integrated membrane evaporator achieved a steady evaporation rate of 3.39 kg m −2 h −1 and a high degradation efficiency of 92% for tetracycline (TC) within 120 min, and when coupled with a thermoelectric module produced electricity with a maximum output power of 0.37 W·m −2 . Our work offers a new hybrid material platform comprising narrow bandgap semiconductor heterostructures, plasmonic noble metals and hydrogel membranes for high-performance multifunctional evaporators.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Mengxin Liu,Pu Zhang,Boran Chen,Zhenyu Yang,Huinan Che,Yanhui Ao
Singlet oxygen ( 1 O 2 ) is promising for volatile organic compounds (VOC) removal in solar-driven interfacial evaporation (SDIE) systems, owing to its selectivity for electron-rich organic compounds and anti-interference capability. The radical precursor ·SO 5 − from peroxymonosulfate (PMS) is often strongly adsorbed and quenched on catalyst surfaces, impeding efficient 1 O 2 generation. To address this, we developed a bifunctional Co 3 O 4 /polyacrylamide hybrid hydrogel (Co 3 O 4 /PAMHH) evaporator, embedding Co 3 O 4 catalyst in a hydrophilic, hydrogen-bonding PAMHH network. This design precisely lowers the adsorption energy of ·SO 5 − on Co 3 O 4 surface to facilitate its desorption and enrichment within PAMHH pores, thereby establishing an optimal microenvironment for 1 O 2 formation. Scavenging experiments and ESR spectroscopy verified the directional production of 1 O 2 . With this design, Co 3 O 4 –0.2/PAMHH achieves stable phenol (PE) degradation across diverse pH and ionic conditions, achieving 90.4% PE removal in bulk water and 99.3% in condensed water with 2 mM PMS. Leveraging Co 3 O 4 's photothermal properties, an impressive evaporation rate of 3.40 kg m −2 h −1 was achieved under one sun irradiation. This work presents a novel microenvironment-regulated strategy that selectively directs PMS activation toward 1 O 2 , enabling simultaneous high-rate solar interfacial evaporation and efficient VOC removal. It establishes a new paradigm for precise control of reaction pathways in bifunctional solar-driven systems and offers a sustainable solution for integrated water purification and pollutant remediation.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Jinmin Li,Yexiong Huang,Chunxin Hao,Tingyu Liu,Lei Yang,Shuaiqi Li,Mingyu Pi,Dingke Zhang
Conductive hydrogels are promising functional materials with numerous potential applications in flexible electronics. Nevertheless, developing conductive hydrogels with superior mechanical properties, high electrical conductivity, and robust environmental adaptability remains a significant challenge for flexible strain sensors. Here, a metal-ion and cellulose nanofibers (CNFs)-reinforced conductive hydrogel based on polyacrylamide (PAM)/polyvinyl alcohol (PVA) double network structure is synthesized via a facile one-pot polymerization followed by a solvent displacement strategy. Tannic acid (TA)-modified CNFs are strategically incorporated into PAM/PVA conductive hydrogel network structure, synergistically reinforced by dual metal ions (Na + /Fe 3+ ), to enhance mechanical and electrical properties simultaneously. The resulting conductive hydrogel exhibits an ultrahigh elongation at break (1440 %), a robust tensile strength (110 kPa), and a high conductivity (0.32 S/m). Furthermore, the organic solvents endow the conductive hydrogel with exceptional antifreezing and antidrying capabilities, ensuring the long-term stability under ambient conditions. In addition, the fabricated conductive hydrogel serves as a core strain-sensing element, demonstrating a good strain sensitivity with a gauge factor (GF) of 2.6 over a 0–250 % strain range, and can be used for human motion monitoring. This study presents a versatile strategy for fabricating conductive hydrogels with tunable properties for wearable electronics.
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PubMed
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BIOSENSORS & BIOELECTRONICS
·
2026
·
IF 11.8
Yuanyuan Miao,Chuang Wang,Yue Peng,Xinyuan Sun,Zhaokun Zheng,Qianlei Zhang,Wenting Cheng,Jinlong Li
Prostate specific membrane antigen (PSMA)-positive exosomes hold significant potential for the diagnosis and risk assessment of prostate cancer. However, accurate detection is severely hindered by their low abundance in blood and interference from similarly sized particles. In this study, we have developed a protospacer adjacent motif (PAM)-assembled clustered regularly interspaced short palindromic repeat (CRISPR)-Cas12a activation-based fluorescent and colorimetric dual-modal biosensor for the highly sensitive detection of PSMA-positive exosomes. In this work, two split strands respectively containing CD63 and PSMA aptamers are utilized to bind CD63 and PSMA on the exosome surface, forming a template that induces the opening of a hairpin DNA (HP DNA). A PAM site forms via hairpin-to-double-stranded structure transition. CRISPR-Cas12a recognizes PAM, activates to cleave FAM-labeled probes for fluorescence, while cerium dioxide nanozyme (CeO 2 NZ) (with phosphatase-mimicking activity) hydrolyzes cleavage products. Hydroxyl radicals from hydrolysis oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to induce colorimetry. CRISPR-Cas12a-nanozyme dual recognition significantly improves prostate cancer exosome detection selectivity and sensitivity. Under optimized conditions, the limits of detection for the fluorescence and colorimetric modes reach 49 particles/μL and 63 particles/μL, respectively. By mutually validating dual detection modes, this biosensing technology accurately distinguishes prostate cancer patients from healthy individuals, holding great promise for early diagnosis.
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Advanced Materials Technologies
·
2024
·
IF 6.4
Xiujie Guo,Wenjing Qin,Changshun Gu,Xinxin Li,Mengyao Chen,Hanlin Zhai,Xiangchuan Zhao,Hengchao Liu,Boxin Zhao,Yan Zhang,Yanli Wang,Shougen Yin
Conductive hydrogel is considered a promising wearable sensor material. Developing flexible conductive hydrogel sensors with stretchability, adhesion, and stability remains challenging. In this study, a transparent, self-adhesive, antifreeze, anti-UV, stretchable, conductive, and reusable hydrogel with polyacrylamide/glycerol/gelatin/tannic acid/Fe 3+ (PGGT-Fe 3+ ) structure is successfully constructed through a simple one-pot polymerization method. The PGGT-Fe 3+ hydrogel is composed of dual networks of polyacrylamide and gelatin for organic cross-linking, using water/glycerol as the dispersion medium, and incorporates a viscous substance: tannic acid, and a conductive substance: metal ions (Fe 3+ ). Due to the introduction of the abundant amino, carboxylic acid, and hydroxyl functional groups on gelatin and tannic acid, the PGGT-Fe 3+ hydrogel exhibits excellent and repeatable adhesion capabilities on various surfaces (including glass, metal, plastic, and pigskin) with maximum adhesion strength of 98 kPa when attached to pigskin. Furthermore, based on the stable conductive network and high conductivity, the hydrogel not only exhibits strain sensitivity, fast response, and stability but also can stably collect epidermal bio signals. In conclusion, this work provides a new approach to the design and development of next-generation multifunctional conductive hydrogels and opens up vast possibilities for their applications in the flexible electronics field.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
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高影响因子
Case Studies in Construction Materials
·
2026
·
IF 6.9
Pengjie Rong,Pei Tang
CO 2 curing technology for construction materials faces three major challenges: limited CO 2 diffusion due to the dense CaCO 3 layer, inefficient reaction kinetic, and internal stresses induced by volumetric expansion during the carbonation curing process. This study introduces a layered structure strategy employing PAM hydrogel as interlayers between γ-C 2 S layers to address these limitations through the combined functions of PAM incorporation and layered structural design. Layered structure specimens achieved compressive strength of 127.60 MPa, flexural strength of 23.68 MPa, and carbonation degree of 41.8%, representing improvements of 114.63%, 29.05%, and 9.9 percentage points, respectively, over conventional compaction structure. Multiscale characterization indicated that PAM incorporation and its layered spatial arrangement contributed differently to carbonation behavior and mechanical performance. First, the PAM interlayer formed a CO 2 permeation network through horizontal layer channels, enabling carbonation to penetrate beyond surface regions. Second, the polyacrylamide hydrogel maintains optimal humidity conditions coupled with interfacial Ca 2 + -carboxylate coordination accelerates ion leaching and reaction kinetics. Third, the polyacrylamide layer dissipates volumetric stresses during the reaction process through reversible deformation and energy dissipation, thereby enhancing material toughness and strain-bearing capacity. This layered manufacturing strategy provides a viable route to simultaneously optimize CO 2 sequestration and mechanical performance, offering new perspectives for developing carbonation mineralized materials and advancing CO 2 curing technology toward industrial application.
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