NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 12
·5825-5831
·
IF 3.3
Cheng Zhou,Shengping Dai,Xiaoshuang Zhou,Hao Zhu,Guanggui Cheng,Jianning Ding
Inspired by the stimuli-responsive ability of biological, a variety of hydrogel have been prepared by stimulus, showing great application value in actuators, soft robots, etc. However, it is still challenging to prepare a toughness hydrogel by the way of stimuli-responsive. Herein, we constructed a novel dual-network structure PNIPAM/PVA hydrogel using reversible molecular configuration conversion of PNIPAM chains. Under the stimulus of ethanol, the elastic modulus of PNIPAM/PVA hydrogel can be increased by 47 times (5 times the change of the modulus of sea cucumbers’ tissue) and the stress can be six times of the original. The dynamic borate ester bond formed by the cross-linking of PVA and borax in the hydrogel enables rapid self-healing (η > 99%) within three minutes without external stimulus in the natural environment. In addition, PNIPAM/PVA hydrogels also showed outstanding underwater reversible thermokinetic properties (>25°) based on the hydrophilic/hydrophobic conversion of PNIPAM under thermal stimulation. The successful preparation of ethanol stimulus-enhancing self-healing PNIPAM/PVA hydrogel actuators, provides a new idea for the development of the soft underwater robots.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Liu Yang,Lixuan Ren,Yanzhen Zhao,Siqun Liu,Huifang Wang,Xianghua Gao,Baolong Niu,Wenfeng Li
In this study, arginineated chitosan (ACS) was used as a soft brain membrane and chelating agent to synthesize ACS-ZnO NPs, and then ACS and ACS-ZnO NPs were added to a polyvinyl alcohol (PVA) matrix as an antimicrobial agent to form films by casting. The formation and structural morphology of ACS and ACS-ZnO NPs were investigated by applying FTIR, 1 H NMR, XRD, EDS, SEM, and TEM techniques, and ACS has shown better water solubility. The cytotoxicity experiments of ACS and ACS-ZnO NPs on A549 cells showed that both had good cytocompatibility. The incorporation of ACS and ACS-ZnO NPs improves the composite film's mechanical properties, water barrier, and oxygen barrier and exhibits excellent antibacterial activities against S. aureus and E. coli . More importantly, in addition to extending the shelf life of cherry tomatoes, the composite film is also biodegradable to some degree. Therefore, polyvinyl alcohol films based on ACS and ACS-ZnO NPs added as antimicrobial agents have great potential for food packaging applications.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chichi Ruan,Guanyu Chen,Yuanshneg Ma,Chunhua Du,Chunxiang He,Xinyu Liu,Xin Jin,Qilin Chen,Song He,Yajun Huang
Efforts to develop a green, inexpensive and effective adsorbent are crucial for eliminating antibiotics in polluted water. The sorption capacity of the as-prepared polyvinyl alcohol (PVA)-assisted cellulose nanocrystals/SiO 2 (CNCs/SiO 2 ) composite aerogel to ciprofloxacin (CIP) rises with the increase of temperature and initial concentration. Reverse trend of sorption capacity can be found when increasing the adsorbent dosage of adsorbent. The optimal pH value for the sorption is proved to be 4. It’s found in the uniaxial compression test that the maximum load that PVA-assisted aerogels can withstand is nearly 100 times than that of non-PVA aerogels. Sorption results confirm that the Pseudo-second order (R 2 = 0.9885) and Langmuir models (R 2 = 0.9959) fit well to sorption kinetics and equilibrium data, respectively. The rate constant differs from the initial concentration of CIP according to the Pseudo-second order model. The composite aerogel sorption capacity of Langmuir (q max ) for CIP was 163.34 mg·g −1 . The thermodynamic studies showed that the sorption process is endothermic with the value of enthalpy change of 41.032 kJ/mol. Hydrogen bonding , π–π interaction, hydrophobic and electrostatic interactions are the dominant mechanisms of CIP sorption by the PVA-assisted CNCs/SiO 2 composite aerogel.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·797
·
IF 5.719
Feipeng Wang,Zheng Zhang,Yuyang Yan,Zijia Shen,Qiang Wang,Reimund Gerhard
Tailoring the secondary surface morphology of electro-spun nanofibers has been highly desired, as such delicate structures equip nanofibers with distinct functions. Here, we report a simple strategy to directly reconstruct the surface of polyvinyl alcohol/polyvinylpyrrolidone (PVA/PVP) nanofibers by water evaporation. The roughness and diameter of the nanofibers depend on the temperature during vacuum drying. Surface changes of the nanofibers from smooth to rough were observed at 55 °C, with a significant drop in nanofiber diameter. We attribute the formation of the secondary surface morphology to the intermolecular forces in the water vapor, including capillary and the compression forces, on the basis of the results from the Fourier-transform infrared (FTIR) and X-ray photoelectron (XPS) spectroscopy. The strategy is universally effective for various electro-spun polymer nanofibers, thus opening up avenues toward more detailed and sophisticated structure design and implementation for nanofibers.Keywords:surface reconstruction;intermolecular force;surface-roughened nanofiber
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PubMed
高影响因子
DRUG DELIVERY
·
2020
·
IF 4.902
QingQing Leng,Yue Li,XianLun Pang,BiQiong Wang,ZhouXue Wu,Yun Lu,Kang Xiong,Ling Zhao,Ping Zhou,ShaoZhi Fu
Skin repair remains a common problem in plastic surgery. Wound dressing plays an important role in promoting local skin healing and has been widely studied. This study aimed to manufacture a composite film (CPCF) containing curcumin nanoparticles, collagen, and polyvinyl alcohol (PVA) to effectively promote the healing of skin wounds. Sustained drug release from the composite film provides long-term protection and treatment for skin wounds. Both antibacterial property and good histocompatibility of the CPCF were examined by analyzing antibacterial activity and cytotoxicity to validate its applicability for wound management. Moreover, in vivo studies proved that the CPCF had a rapid healing rate of 98.03%±0.79% and mature epithelialization on day 15 after surgery. Obvious hair follicles and earlier re-epithelialization was also noticed in the CPCF group using H&E staining. The result of Masson’s trichrome staining confirmed that CPCF could promote the formation of collagen fibers. In summary, CPCF may be promising as a wound dressing agent in wound management owing to its rapid wound-healing effects.
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PubMed
高影响因子
ACS Omega
·
2021
·
IF 3.512
Zhen Shi,Yazhen Wang,Tianyuan Xiao,Shaobo Dong,Tianyu Lan
We have designed a new magnetic targeting drug carrier Fe3O4-PVA with a core of triiron tetroxide (Fe3O4) and a shell made of polyvinyl alcohol (PVA) to improve the hydrophilicity of Fe3O4. With adriamycin hydrochloride as a model drug, this study goes on to measure the drug carrier performance of Fe3O4-PVA. In addition, the thermal stability and enthalpy of thermal decomposition of Fe3O4-PVA were measured using a differential scanning calorimeter with a non-isothermal decomposition method. The kinetics of thermal decomposition of Fe3O4-PVA were also investigated. Over the course of this study, it was determined that the resulting drug carrier Fe3O4-PVA exhibited high drug loading levels and excellent release levels.
研究领域:
材料科学
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药剂学
·
生物医学工程
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高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Hongjing Cheng,Zhaohua Yang,Feipeng Du,Hui Liu,Qiao Zhang,Yunfei Zhang
Recently, developing facile, cheap, and efficient nano‑silver catalysts for the reduction of waste 4-nitrophenol (4-NP) to useful 4-aminophenol (4-AP) has attracted more and more attention. In this study, a facile mechanical foaming method was used to fabricate Ag/halloysite nanotubes/polyvinyl alcohol sponges (Ag/Hal/PVA) for enhanced degradation of 4-NP. It included the preparation, morphology and composition characterization, and catalytic performance test of Ag/Hal/PVA. The morphology and composition of Ag/Hal/PVA were characterized by field emission scanning electron microscopy , Fourier transform infrared spectra , Raman spectra , X-ray photoelectron spectroscopy, thermo-gravimetric analysis, and XRD, respectively. BET and UV–vis spectrum measurements were used to test the adsorption and catalytic performance of Ag/Hal/PVA for 4-NP. The results showed that silver nanoparticles (AgNPs) were evenly distributed in the Hal/PVA sponge. Moreover, halloysite nanotubes (Hal) greatly improved the specific surface area and the loading capacity for AgNPs of the sponge due to the hollow tubular structure of Hal. The specific surface area of the Ag/Hal/PVA was about 1.62 m 2 /g. The obtained Ag/Hal/PVA exhibited a good catalytic activity and the apparent rate constant was 0.297 min −1 , and a good stability up to 5 cycles without a significant loss of its catalytic activity. This study provided a facile strategy for the development of cheap Ag/Hal/PVA sponges for high efficient reduction of 4-NP, which has potential application in the filed water treatment
研究领域:
环境科学
·
材料科学
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高影响因子
Membranes
·
2016
·Vol. 6
·期 4
·47
·
IF 0
Ningen Hu,Tonghu Xiao,Xinhai Cai,Lining Ding,Yuhua Fu,Xing Yang
In this study, a nonsolvent thermally-induced phase separation (NTIPS) method was first proposed to fabricate hydrophilically-modified poly(vinylidene fluoride) (PVDF) membranes to overcome the drawbacks of conventional thermally-induced phase separation (TIPS) and nonsolvent-induced phase separation (NIPS) methods. Hydrophilically-modified PVDF membranes were successfully prepared by blending in hydrophilic polymer polyvinyl alcohol (PVA) at 140 °C. A series of PVDF/PVA blend membranes was prepared at different total polymer concentrations and blend ratios. The morphological analysis via SEM indicated that the formation mechanism of these hydrophilically-modified membranes was a combined NIPS and TIPS process. As the total polymer concentration increased, the tensile strength of the membranes increased; meanwhile, the membrane pore size, porosity and water flux decreased. With the PVDF/PVA blend ratio increased from 10:0 to 8:2, the membrane pore size and water flux increased. The dynamic water contact angle of these membranes showed that the hydrophilic properties of PVDF/PVA blend membranes were prominently improved. The higher hydrophilicity of the membranes resulted in reduced membrane resistance and, hence, higher permeability. The total resistanceRtof the modified PVDF membranes decreased significantly as the hydrophilicity increased. The irreversible fouling related to pore blocking and adsorption fouling onto the membrane surface was minimal, indicating good antifouling properties.Keywords:nonsolvent thermally-induced phase separation (NTIPS);PVDF/PVA blend membrane;hydrophilic modification;membrane resistance;antifouling property
研究领域:
材料科学
·
环境工程
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DOI
PubMed
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jingwen Lan,Yiming Gong,Baining Lin,Airong Xu,Rukuan Liu
Achieving high performance conductive hydrogel sensor which is capable of combining as many advantages as possible in one is highly desired to satisfy real-world tasks. To this end, novel hydrogel sensors PVA/NaDa (polyvinyl alcohol/D-Gluconic acid sodium salt) and PVA/NaLa (polyvinyl alcohol/L-Glutamic acid monosodium salt) have been successfully constructed via a facile and effective strategy. The hydrogels realize the combination of robust mechanical properties (stress, strain, elastic modulus, toughness, fatigue resistance, anti-breakage ability and recovery performance), excellent conductivity, sensitive sensitivity, rapid response capacity and high cytocompatibility. The increasing hydrogen bond cross-linking density and hydrogen bond interactions of NaDa (NaLa) with PVA are mainly responsible for significantly intensified mechanical properties of PVA/NaDa and PVA/NaLa hydrogels. Benefiting from the prominent performances, the hydrogels can be processed into flexible membrane sensors to not only effectively detect the human joint motions but also sensitively simulate manual control of the mobile phone screen for writing text, demonstrating a promising application in multifunctional intelligent robots, electronic skins, artificial intelligence and among others.
研究领域:
材料科学
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传感器
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生物医学工程
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纳米技术
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机器人
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人工智能
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高影响因子
Functional Materials Letters
·
2025
·
IF 1.1
Lejuan Cao,Jing Li,Jie Huang,Jiachen Lei,Siqi Zheng
Inorganic aerogels have promising applications in thermal insulation of buildings or industries due to their low thermal conductivity and good thermal stability. In this paper, magnesium borate whiskers (MBOWs) and polyvinyl alcohol (PVA) are used to prepare PVA/MBOWs aerogels by self-assembly combined with freeze-drying technique. The PVA/MBOWs aerogels develop a new synthesis route and composite aerogels system for a wide range of short fibre scaffolds. The well-developed laminar-like pore structure is obtained with the average pore size of about 100-200 nm. The aerogels show good thermal insulation properties with a low thermal conductivity of about 0.03 W/(m·K). Thermal insulation better than commercial thermal insulation, layer clay aerogels, the average temperature difference can reach 5.7 ° C. In addition, through the formation of thermal insulation coke layer in the combustion/non-combustible gases/cooling flame retardant synergistic mechanism, to achieve a good fire retardant effect. Moreover, the maximum stress at 0.6 mm/mm strain is 1.8 MPa, which indicates that the aerogels have better mechanical properties. The combination of these properties makes PVA/MBOWs aerogels an effective and practical candidate for building insulation.
研究领域:
材料科学
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高分子科学
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热绝缘
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阻燃材料
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纳米材料
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Wang Zhiqin,Li Wei,Xiao Ningyu,Wang Chenxing
Conductive hydrogels show great potential for flexible sensors, yet their applications are limited by low strength, poor freeze resistance, and easy dehydration. To address these issues, this paper developed a multifunctional PVA (polyvinyl alcohol)/CMC (carboxymethyl cellulose sodium)/PANI (polyaniline)/PA (phytic acid)/BA (boric acid)/Fe 3+ hydrogel (denoted as PMNF) with a double-network structure formed via the Hofmeister effect and in situ polymerization. The hydrogel exhibits excellent mechanical properties (tensile strength: 236 kPa; elongation: 541%), high conductivity (2 S/m), and improved antifreezing behavior. At −12°C, it retains a conductivity of 0.86 S/m and over 300% elongation. It also demonstrates strong water retention after 15 days and stability in acidic/alkaline salt environments. Based on these properties, PMNF-based sensors reliably detect both subtle and large human motions under various conditions. This work offers a practical strategy for developing robust wearable electronics suited for real-world use.
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Laser & Photonics Reviews
·
2025
·
IF 10
Yuqi Li,Yikai Chen,Ziting Zhong,Zhun Ran,Shihuan Luo,Zhenzhen Li,Yong Shao,Jianle Zhuang,Xuejie Zhang,Zhouyi Guo,Yingliang Liu,Zhiming Liu,Chaofan Hu
As a kind of light-responsive material, carbon dots (CDs) have important application values in the fields of anti-counterfeiting, information encryption, and biological imaging. However, currently, there are few reports on the photochromic luminescence phenomenon of CDs, and there is a lack of in-depth research on the structural design and luminescence mechanism of CDs with photochromic luminescence. In this study, CDs with the structure of naphthalimide derivatives are synthesized by a one-step method through a reasonable selection of precursors. Under continuous ultraviolet light irradiation, CDs achieved photochromic luminescence from 425 to 640 nm within 0 to 30 s, and this property is enhanced after being compounded with a polyvinyl alcohol film. Research analysis shows that the structure of the naphthalimide derivative on the surface state of the CDs undergoes structural changes during the ultraviolet light irradiation process, activating the surface state luminescence center. The surface state luminescence center and the core state luminescence center constitute the dual emission centers of CDs. Based on the excellent full-color photochromic properties of CDs in polyvinyl alcohol, we have designed applications in portable UV detection and advanced dynamic information encryption, demonstrating promising application prospects. This study provides new insights into the photochromic luminescence of CDs.
研究领域:
材料科学
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纳米技术
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光学材料
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光物理
·
信息安全
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高影响因子
危险品化学品经营许可证（带存储）