CELLULOSE
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2022
·Vol. 29
·期 18
·9671-9691
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IF 6.123
Zhao Jiaojiao,Zhou Jianhua,Li Hong,Xiao Anguo
In order to reduce the thermal discomfort and fire accidents caused by overheating of electronics and high temperature of buildings, high-performance thermal insulation and fire-resistant materials are urgently desirable. Cellulose nanofiber cryogel derived from regenerative resources holds wide promise in the field of thermal insulation, but its inherent flammability, poor mechanical strength and water resistance make it face great challenges in practical application. Herein, a lightweight, porous, anisotropic cellulose nanofiber/hydroxylated boron nitride nanosheet/methyltrimethoxysilane composite cryogel (Si-CNF/BNNS) was prepared by unidirectional freeze-casting technique. Attributed to the hydrogen bond and silylation cross-linking of CNFs with BNNS and MTMS, as well as the aligned structure of cryogel, Si-CNF/BNNS cryogel was robust axially and compressible radially. The thermal conductivity of cryogel was 0.0621 W m −1 K −1 in the axial direction and 0.0339 W m −1 K −1 in the radial direction, demonstrating an anisotropic thermal insulation performance. In addition, the silylation modification and the addition of BNNS endowed cryogel with excellent flame retardant and hydrophobic properties, as evidenced by extremely low peak heat release rate of 14.05 kW m −2 and water contact angle of 136.6°. Surprisingly, the high reflectivity of CNFs and BNNS with white appearance in the solar spectral range enabled the composite cryogel to have superior radiative cooling performance. This high-performance anisotropic Si-CNF/BNNS cryogel shows great potential for improving thermal comfort and environmental safety in the field of electronic packaging and energy efficient buildings. Moreover, this preparation procedure mainly includes liquid nitrogen orientation and freeze-drying, and can be further expanded for large-scale production of cellulose-based cryogels. Graphical abstract
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International Journal of Minerals Metallurgy and Materials
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2022
·Vol. 29
·期 11
·1954-1962
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IF 3.85
Zhao Yue,Wang Bei,Shi Minjie,An Shibo,Zhao Liping,Yan Chao
Rechargeable aqueous magnesium-ion batteries (MIBs) show great promise for low-cost, high-safety, and high-performance energy storage applications. Although manganese dioxide (MnO 2 ) is considered as a potential electrode material for aqueous MIBs, the low electrical conductivity and unsatisfactory cycling performance greatly hinder the practical application of MnO 2 electrode. To overcome these problems, herein, a novel Mg-intercalation engineering approach for MnO 2 electrode to be used in aqueous MIBs is presented, wherein the structural regulation and electrochemical performance of the Mg-intercalation MnO 2 (denoted as MMO) electrode were thoroughly investigated by density functional theory (DFT) calculations and in-situ Raman investigation. The results demonstrate that the Mg intercalation is essential to adjusting the charge/ion state and electronic band gap of MMO electrode, as well as the highly reversible phase transition of the MMO electrode during the charging-discharging process. Because of these remarkable characteristics, the MMO electrode can be capable of delivering a significant specific capacity of ∼419.8 mAh·g −1 , while exhibiting a good cycling capability over 1000 cycles in 1 M aqueous MgCl 2 electrolyte. On the basis of such MMO electrode, we have successfully developed a soft-packaging aqueous MIB with excellent electrochemical properties, revealing its huge application potential as the efficient energy storage devices.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-15
·
IF 9.429
Chen Sheng,Song Yonghong,Yan Xu,Dong Liang,Xu Yunjun,Xuan Shouhu,Shu Quan,Cao Baoqiang,Hu Jinlong,Xing Hanye,Wu Wenshu,Zha Zhengbao,Lu Yang
Bioactive materials have been extensively developed for the adjuvant therapy of cancer. However, few materials can meet the requirements for the postoperative resection of hepatocellular carcinoma (HCC) due to massive bleeding and high recurrence. In particular, combination therapy for HCC has been highly recommended in clinical practice, including surgical resection, interventional therapy, ablation therapy and chemotherapy. Herein, an injectable magnetic colloidal gel (MCG) was developed by controllable electrostatic attraction between clinically available magnetic montmorillonites and amphoteric gelatin nanoparticles. The optimized MCG exhibited an effective magnetic heating effect, remarkable rheological properties, and high gel network stability, realizing the synergistic treatment of postoperative HCC by stimuli-responsive drug delivery, hemostasis and magnetic hyperthermia. Furthermore, a minimal invasive MCG-induced interventional magnetic hyperthermia therapy (MHT) under ultrasound guidance was realized on hepatic tumor rabbits, providing an alternative therapeutics to treat the postoperative recurrence. Overall, MCG is a clinically available injectable formulation for adjuvant therapy after HCC surgical resection.
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PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-15
·
IF 9.429
Ding Yingying,Jin Yang,Peng Tao,Gao Yankun,Zang Yang,He Hongliang,Li Fei,Zhang Yu,Zhang Hongjuan,Chen Lina
Background Disruption of the postsynaptic density protein-95 (PSD95)—neuronal nitric oxide synthase (nNOS) coupling is an effective way to treat ischemic stroke, however, it still faces some challenges, especially lack of satisfactory PSD95-nNOS uncouplers and the efficient high throughput screening model to discover them. Results Herein, the multifunctional metal–organic framework (MMOF) nanoparticles as a new screening system were innovatively fabricated via layer-by-layer self-assembly in which His-tagged nNOS was selectively immobilized on the surface of magnetic MOF, and then PSD95 with green fluorescent protein (GFP-PSD95) was specifically bound on it. It was found that MMOF nanoparticles not only exhibited the superior performances including the high loading efficiency, reusability, and anti-interference ability, but also possessed the good fluorescent sensitivity to detect the coupled GFP-PSD95. After MMOF nanoparticles interacted with the uncouplers, they would be rapidly separated from uncoupled GFP-PSD95 by magnet, and the fluorescent intensities could be determined to assay the uncoupling efficiency at high throughput level. Conclusions In conclusion, MMOF nanoparticles were successfully fabricated and applied to screen the natural actives as potential PSD95-nNOS uncouplers. Taken together, our newly developed method provided a new material as a platform for efficiently discovering PSD95-nNOS uncouplers for stoke treatment. Graphical Abstract
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PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2022
·Vol. 30
·期 1
·1898-1907
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IF 5.19
Nguyen Linh T. T.,Le Phuong T.,Nguyen Tien A.,Doan Nhuan N.,No Kwangsoo
Phytoremediation is one of the most powerful and viable solutions for developing countries to clean the soil and water bodies from metallic pollutants. Cyperus alternifolius Linn. (CAL), a tropical wetland plant, has been widely researched for removing harmful contaminants due to its hyperaccumulation ability. However, the waste biomass of phytoremediation processing may risk secondary environmental pollution. Thus, the preparation and application of biochar from metal-contaminated plants can be considered a new approach. In a 60-day experiment, CAL plants were irrigated with different concentrations of Zn(II) (200, 700, 1200, 1700, and 2200 mg·L −1 ), and then the plants were converted into biochar via the pyrolysis process. The characteristics of biochar including of surface composition and morphology, phase formation, and optical property were analyzed. The biochar enriched with Zn(II) at 1200 mg·L −1 had a bandgap value of 3.17 eV and consisted of carbon microparticles intermingled with ZnO and SiO 2 nanoparticles. Furthermore, the adsorption and photocatalysis of the biochar were studied in the discolouration of methylene blue (MB), as a test reaction, with the maximum MB removal capacities of 55.2 mg·g −1 . Such results will serve as the basis for new research aiming at the potential for reusing metal-contaminated plants to produce efficient depolluting biochar.
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PubMed
高影响因子
POLYMER BULLETIN
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2022
·Vol. 80
·期 7
·7451-7467
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IF 2.843
Wang Na,Wang Xinhui,Xu Baoming,Wang Yili,Lu Junliang,Chen Guorong,Zhang Heng
A surfactant with biodegradability and amphiphilicity was prepared from cellulose nanocrystals by grafting fatty acids. The structure of the modified cellulose nanocrystals was investigated by infrared spectroscopy, XRD, particle size detection and scanning electron microscopy. The changes in surface tension of the modified cellulose nanocrystals under different salt ion concentrations and pH were tested, and the molecular model of the modified cellulose nanocrystals was constructed. The optimum reaction conditions for the grafting of different fatty acid groups were determined by the degree of substitution. Infrared characterization and X-ray diffraction analysis showed that the reactants were successfully esterified and chemically modified. The particle detection shows that the average particle size of the modified cellulose nanocrystals is slightly increased, but it is still at the nanometer level and still has large specific surface area. The surface tension of the surfactant in the aqueous phase will decrease by changing the salt concentration and pH of the test environment, while the range is not large. Therefore, using trifluoroacetic anhydride as co-reactant, long-chain fatty acids can be grafted onto cellulose nanocrystals to form hydrophobic modified cellulose nanocrystals. The modified cellulose nanocrystals have little change in average particle size and have hydrophilic and lipophilic properties and are nonionic surfactants, which can be used as emulsifier for emulsion preparation. It is found that the modified cellulose nanocrystals have good salt resistance and acid and alkali resistance by testing the changes in surface tension under different environments.
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ANALYTICAL SCIENCES
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2022
·Vol. 38
·期 10
·1305-1312
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IF 1.967
Liu Piaotong,Hao Rusi,Sun Wenliang,Lin Ziyi,Jing Tianfeng,Yang Haizhen
A facile and efficient “bottle-around-ship” approach for preparing the ratiometric fluorescent probe has been developed by encapsulating the red-colored fluorescence CdTe quantum dots (QDs) and blue-colored fluorescence graphitic carbon nitride quantum dots (g-CNQDs) into the zeolitic imidazolate metal–organic frameworks (ZIF-8) in one step. At a single excitation of 360 nm, the obtained probe ZIF-8@g-CNQD/CdTe shows the dual-emission peaked at 450 and 633 nm, respectively. The red emission of CdTe QDs is selectively quenched by the Hg 2+ , whereas the blue fluorescence of g-CNQDs as an internal reference is insensitive, resulting in an apparent color transformation from pink to blue for special recognition of Hg 2+ . By this approach, the relative fluorescence intensity ratio ( F 633 / F 450 ) decreased linearly with increasing Hg 2+ concentration in the 0.2–3.5 μM range with a low limit of detection (LOD) of ~ 46 nM. Therefore, we demonstrate that this “bottle-around-ship” process provides a new strategy for the construction of ratiometric fluorescent Hg 2+ probes with good simplicity, high efficiency, and excellent stabilities. Moreover, the obtained Hg 2+ fluorescent probe shows good results in the detection of actual samples. Graphical abstract
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Nano Research
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2022
·Vol. 15
·期 10
·9092-9104
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IF 10.269
Wang Helin,Lu Qi,Miao Yifan,Song Jiaxuan,Zhang Mingyang,Wang Zixuan,Zhang Haotian,He Zhonggui,Tian Chutong,Sun Jin
The reduction-responsive disulfide bonds have been widely used as bioactive linkages to facilitate a rapid release of anticancer drugs into tumor cells. However, the activation can be hindered by the kinetics of the thiol-disulfide exchange reactions. Supplementing with an additional reductant is a promising strategy to further boost drug release. Herein, inspired by the specific absorption mechanism of triglyceride fat, structured lipid-mimetic oral prodrugs of 7-ethyl-10-hydroxycamptothecin (SN38) were designed to improve intestinal permeability and bypass the first-pass effect. SN38 prodrugs were prepared into lipid formulations that could self-emulsify into nano-sized particles after entering the gastrointestinal tract. Surprisingly, we found that the oral bioavailability of the prodrug lipid formulation could be up to 2.69-fold higher than that of the parent SN38, indicating an effective oral delivery. In addition, the reduction-responsive disulfide bond was used as a linker, and ascorbic acid (ASC) was coadministrated to further promote the efficient release of SN38 from the prodrug. ASC enhanced the oral antitumor effect of the reduction-responsive oral prodrug and exhibited good safety. In summary, the combination of a structured lipid-mimetic prodrug and ASC was firstly demonstrated to boost the oral chemotherapy effect of the difficult-for-oral chemotherapeutics.
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高影响因子
Nanoscale Research Letters
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2021
·Vol. 16
·期 1
·1-11
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IF 4.703
Zhao Shubi,Luo Yiqun,Chang Zong,Liu Chenchen,Li Tong,Gan Lu,Huang Yong,Sun Qinchao
The second near infrared window is considered to be the optimal optical window for medical imaging and therapy as its capability of deep tissue penetration. The preparation of the gold nanorods with long wavelength absorption and low cytotoxicity is still a challenge. A series gold nanorods with large aspect ratio have been synthesized. Strong plasma absorption in the second near infrared window from 1000 to 1300 nm could be observed. The biocompatibility of the synthesized gold nanorods is dramatically improved via coating by bovine serum albumin (BSA), while the optical properties of which remains. The breast cancer tumor-bearing mouse could be well treated by the prepared gold nanorods with the NIR-II light intensity as low as 0.75 W/cm2. In summary, these results demonstrate the feasibility of using low illumination dose to treat tumor in the NIR-II region via the large aspect ratio gould nanoparticles.
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JOM
·
2021
·Vol. 73
·期 12
·4376-4386
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IF 2.474
Zou Qi,Le Qichi,Chen Xingrui,Ban Chunyan,Jia Yonghui,Guo Ruizhen,Wang An
This work investigated the corrosion resistance of AZ80 (Mg-8Al-0.5Zn alloy) with different Nd contents in alkaline solution by the mass loss test, electrochemical test, scanning electron microscope, energy spectrum analysis, and x-ray diffraction. To remove the influence of the Mg 17 Al 12 phase, alloys were heat treated at 410°C for 10 h. Results revealed that Al 2 Nd and AlMnNd phases mainly exist in the alloy. The corrosion rate of the alloy increased when the Nd content was < 0.4 wt.% because the Al 2 Nd phase formed galvanic corrosion with the Mg matrix. With the increase of Nd content, AlMnNd phase appeared in the alloys, which decomposed during the corrosion process and formed a good protective film to reduce the corrosion rate.
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Advanced Fiber Materials
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2021
·Vol. 3
·期 6
·349-358
·
IF 0
Yu Miao,Tian Qihang,He Guangyuan,Cui Kaimin,Zhang Jihong
Surface-enhanced Raman scattering (SERS) provides a novel method for low concentration molecular detection. The performances were highly dependent on the sizes, geometries and distributions of metal nanostructures. Here, highly sensitive SERS fiber probe based on silver nanocubes (Ag NCs) was fabricated, by assembled nanostructures on planar and tapered fiber tips. Ag NCs were synthesized by polyol method, and controlled by reductant content, reaction temperatures and crystal growth durations. Tapered fibers with different cone angles were prepared by chemical etching. The electromagnetic distribution simulation indicated that nanocubes had stronger electric field between two cubes and vertex corners than nanosphere, under 532 nm laser excitation. The intensity could reach 53.52 V/m, for cubes with 70 nm edge length. The SERS performance of probes was characterized using crystal violet analyte. The detectable lowest concentration could reach 10 –9 and 10 –10 M for planar and tapered fiber probes, respectively. The corresponding enhancement factor could be 9.02 × 10 7 and 6.22 × 10 8 . The relationship between SERS peak intensities and analyte concentrations showed well linear, which indicated both fiber probes could be applied for both qualitative and quantitative analysis. Furthermore, optimal cone angle of tapered fiber SERS probe was 8.3°. The tapered fiber SERS probes have highly sensitive activity and great potential in substance detection. Graphic abstract
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JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 28
·期 11
·1-13
·
IF 3.097
Yang Mingcheng,Guo Wenhui,Liu Shubo,Zhang Benshang,Chen Yang,Wang Yun
The development of facile and cost-effective strategies for hydrogels with multifunctionality is of great scientific interest. In this work, a series of poly (vinyl alcohol)/tannic acid (PVA/TA) composite hydrogels were facilely prepared by gamma radiation of a PVA solution and subsequent soaking treatment in TA solutions. The chemical composition, transparency, microstructure, mechanical property and antibacterial activity of the resulting composite hydrogels were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), UV-Vis spectroscopy, SEM, tensile measurements and an antibacterial test, respectively. The introduction of TA into the gamma radiation-induced chemically cross-linked networks of PVA hydrogels via the soaking treatment, which forms the second physically cross-linked networks, endows the PVA hydrogels with improved mechanical performance. The tensile strength, toughness and elongation at break of the composite hydrogel were increased by 1500 % (from 18 kPa to 254 kPa), 3600 % (from 8.5 kJ m −3 to 315 kJ m −3 ) and 360 % (from 87 to 403 %), respectively. Meanwhile, high transparency of the neat irradiated PVA hydrogels was maintained in the obtained composite hydrogels (transmittance over 60 % at 660 nm). The strong hydrogen bonding interaction between PVA and TA within the networks serves as sacrificial bonds and suppresses the crystallinity of the PVA hydrogels. In addition, the composite hydrogels also possess superior antibacterial activity against both gram-negative and gram-positive bacteria. This work provided a simple approach for the construction of multifunctional hydrogels on large-scale preparation, thus would hopefully promote their applications in biomedicine, wound dressings and soft devices.
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