INFRARED PHYSICS & TECHNOLOGY
·
2018
·
IF 1.851
Honghan Bu,Guoyue Xu,Chuyang Liu,Tengchao Guo,Shujuan Tan
The green BCG/MgCl 2 /PEG-g-CDA powders were synthesized at different temperatures via liquid-phase reaction method. The microstructures of the synthesized powders were analyzed and characterized by FT-IR, XRD and ChemDraw software. The effects of synthesized temperatures on infrared emissivity properties of the powders in the wavelength range 3–5 μm were investigated systematically. It is found that the powders heated at 100 °C exhibit the optimum crystallinity at room temperature and thus show the largest variation (0.4) in infrared emissivity with the test temperature varying from 50 °C to 65 °C. Furthermore, the mechanisms for the self-regulated infrared emissivity properties are also explored thoroughly. The variation of infrared emissivity with temperature is ascribed to the changes in resistivity, which is induced by the transformation of PEG-g-CDA between crystalline and amorphous as well as the molecular structure transition of BCG between quinone and lactone. Our results suggest that BCG/MgCl 2 /PEG-g-CDA powders are potential candidates for intelligent infrared camouflage.
研究领域:
材料科学
·
光学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2018
·
IF 2.32
Honghan Bu,Chen Xu,Guoyue Xu,Chuyang Liu,Shujuan Tan,Tengchao Guo,Shanshan Xiang
BCG/CaCl 2 /PEG-g-CDA composites with different mass ratios of BCG and CaCl 2 under constant PEG-g-CDA were synthesized via liquid-phase reaction method. The composites were analyzed and characterized using FT-IR, XRD , DSC and UV–vis. The results show that the color changes visibly from green to yellow by improving temperature from 50 °C to 62 °C, and turns back to green reversibly with temperature cooling back to room temperature. The infrared emissivity values increase rapidly at the temperature range of 50 °C–62 °C, and the maximum variation reaches 0.23. Furthermore, the mechanisms for thermochromic phenomenon and tunable infrared emissivity were also proposed. The reversible thermochromic phenomenon is attributed to the molecular structure transformation of BCG between ring-opened quinone structure and ring-closed lactone structure. The tunable emissivity at different temperatures is ascribed to the changes of resistivity under temperature fluctuations. Our results suggest that BCG/CaCl 2 /PEG-g-CDA composites are a potential candidate for smart adaptive camouflage in visible and infrared waveband.
研究领域:
材料科学
·
光学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 62
·38982-38989
·
IF 3.361
Zang Chuanfeng,Han Xiangye,Dong Erying,Shen Feiyu,Yan Tingting,Wang Runyue,Zhang GuangyuYu
A new type of nanofiber membrane was prepared by mixed electrospinning of cellulose diacetate and amino-terminated hyperbranched polymer (HBP-NH2), and glutaraldehyde (GA) crosslinking was used to improve its water resistance and shape retention. pH, adsorption time, and initial solution concentration on Cu(II) and Cr(VI) ions were studied. Results showed that the prepared GA-CDA/HBP-NH2 nanofiber had good spinning uniformity, hydrophilicity, and adsorption effect on Cu(II) and Cr(VI) ions compared with the pure CDA nanofiber. The maximum adsorption capacity of GA-CDA/HBP-NH2 for Cu(II) and Cr(VI) was 50.2 and 176.6 mg g−1, respectively.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Colloids and Interfaces
·
2025
·Vol. 9
·期 5
·62
·
IF 3.2
Tao Song,Jun-Yi Wang,Jiang-Peng Qiu,Jia-Qiang Yang,Zhao-Yun Wang,Yi Zhao,Xiao-Hui Yang,Ren Hu,Jun Cheng,Fang-Zu Yang,Lian-Huan Han,Dong-Ping Zhan
Developing a highly efficient leveler in acid copper electroplating solution is one of the primary tasks necessary for achieving superconformal filling of microvias and interconnections in printed circuit boards (PCBs). Two triethylenediamine-based Gemini levelers, both with terminal quaternary ammonium groups, are synthesized and named as GL1(C8) after reaction of triethylenediamine with 1,8-dichlorooctane and GL2(C6 with two C–O linkages) after triethylenediamine with 1,2-bis(2-chloroethoxy) ethane. Electrochemical experiments indicate that at 100 rpm and 1000 rpm GL2combines with a suppressor and accelerator to exhibit greater potential difference of 23 mV than GL1in 9 mV for Cu2+reduction, demonstrating that GL2has a stronger synergistic convection-dependent adsorption (CDA) effect. Microvias copper electroplating experiments confirm that acid copper electroplating solution containing GL2achieve more effective superconformal void-free filling as it results in FP = 96.1%, while the solution containing GL1results in FP = 70%. Theoretical calculations indicate that adsorption energy of GL2is −1037.54 kJ·mol−1, which is lower than GL1(−1019.06 kJ·mol−1). GL2displays lower electron density compared to GL1, which facilitates its displacement by accelerator at the bottom. The lower adsorption energy of GL2suggests the weaker adsorption ability and the stronger CDA behavior.
研究领域:
材料科学
·
电化学
·
半导体制造
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2017
·
IF 6.319
Yang Fan,Qingjie Wang,Guimei Lin,Yanbin Shi,Zili Gu,Tingting Ding
In this study, novel prodrug-modified cationic liposome nanocomplexes (Combo NCs) were reported for gemcitabine (GEM) and docetaxel (DTX) co-delivery. This nanoplatform exhibited multiple favorable characteristics, such as a ‘green’ fabrication with a one-step chemical reaction, appropriate size (∼200 nm) and distribution (PDI < 0.2), low zeta potential (−31.1 mv), high drug-loading efficiency (9.3% GEM plus 3.1% DTX, wt%) and pH and enzymatic dual-stimulus-responsive release properties. Immunofluorescence and cellular uptake studies showed that Combo NCs efficiently targeted overexpressed CD44 in MDA-MB-231 carcinoma. In vitro studies revealed that Combo NCs played a critical role in the synergistic induction of cytotoxicity, apoptosis and inhibition of wound healing. Combo NCs were confirmed to exhibit great potency for increasing S phase arrest and remodeling the CDA and dCK balance by decreasing the mRNA expression of CDA down to 0.09-fold and increasing the mRNA expression of dCK by 1.36-fold, remarkably increasing the dCK/CDA ratio to 15.3-fold compared with the blank control. The biodistribution results obtained in vivo revealed an effective accumulation in tumor foci. All of these advantages of Combo NCs contributed to their remarkable anti-tumor efficacy without systemic toxicity as well as their apoptosis-enhancing and anti-proliferative capacities, as determined by TUNEL and Ki67 immunohistochemistry in vivo . Consequently, such a rationally contemplated co-delivery system demonstrated the promising potential of clinical applications for triple-negative breast cancer therapy. State of Significance The Combo NCs were innovatively applied for co-delivery of hydrophilic GEM and hydrophobic DTX. The ester bond linking and shielding effect of HA-GEM made the carriers achieve synchronous release properties, which was determined in in vitro release study. Due to the HA modification, the vectors own great potency for positive targeting to CD44 overexpressed triple-negative breast cancer cells MDA-MB-231. Cytotoxicity and apoptosis studies confirmed the targeting effect and synergism between two drugs. Interestingly, we found in cell cycle study, drug combinations (free combination or Combo NCs) didn’t show a rise in G2M phase, which was significantly higher when treated DTX alone. We further discovered the role of DTX in combinations may involve in modulating GEM associated enzymes thus enhancing the efficacy of GEM. Consequently, this nanoplatform provided a novel solution for achieving targeted co-delivery and potentiating effect in cancer therapy.
研究领域:
药学
·
纳米技术
·
肿瘤学
·
药物递送系统
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）