LANGMUIR
·
2018
·
IF 3.789
Guangfa Zhang,Qinghua Zhang,Tiantian Cheng,Xiaoli Zhan,Fengqiu Chen
High durability, low cost, and superior anti-icing and active deicing multifunctional surface coatings, especially in the extreme environment, are highly desired to inhibit and/or eliminate the detriment of icing in many fields, such as automobile, aerospace, and power transmission. Herein, we first report a facile and versatile strategy to prepare novel slippery polyols-infused porous surfaces (SPIPS’s) with the inexpensive polyols as the lubricant liquids. These SPIPS’s are fabricated by a spray-coating approach based on amino-modified magnetic Fe3O4 nanoparticles (MNP@NH2) and amphiphilic P(poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate) copolymer covalent cross-linked hybrids, followed by infusion with various polyols. The as-prepared surface exhibits excellent antifrosting property, that is, it can greatly postpone frost formation as long as 2700 s at −18 °C. Meanwhile, differential scanning calorimetry results clearly demonstrate that SPIPS’s show a remarkable freezing point depression capacity and the crystallization point of water can be decreased as low as −36.8 °C. The SPIPS also displays an extremely low ice adhesion strength (0.1 kPa) due to its unique surface characteristics. Moreover, outstanding active thermal deicing property is achieved for these slippery surfaces because of intrinsically photothermal effect of magnetic Fe3O4 nanoparticle. Hence, these results indicate that this kind of multifunctional bioinspired slippery surface, with superb stability, good cost effectiveness, and easy fabrication, can be used as a promising candidate for anti-icing and deicing applications.
研究领域:
材料科学
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表面工程
·
能源与环境
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Yebin Guan,Weicheng Cao,Hanxi Guan,Xiaohe Lei,Xiaohong Wang,Youzhi Tu,Alessandro Marchetti,Xueqian Kong
Surface-modified hydroxyapatite (HA) nanocomposites have been synthesized from D-fructose-1,6-phosphate trisodium salt octahydrate (DFP) via a simple and green hydrothermal process. Comprehensive X-ray powder diffraction (XRD), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), Thermal gravimetrical analysis (TGA), Fourier transform infrared (FT-IR) and solid state nuclear magnetic resonance (SSNMR) characterizations revealed that the HA nanocomposite adopt a rod-like core/shell morphology in which the inorganic HA core is covered with an organic shell of polyalcohol species. The HA nanocomposite exhibits a large surface area of 203.18 m 2 /g, and enhanced adsorption capacities of organic dyes such as Methyl orange (MO) and Congo red (CR). Remarkably, the adsorption processes were particularly fast in which the equilibriums are reached within minutes. The adsorption kinetics can be well described by a pseudo-second-order kinetic model. These experimental results demonstrated that such HA nanocomposites are promising adsorbents for the efficient removal of organic dyes from water.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·945-949
·
IF 0.605
Kang Jiaqing,Chen Wei,Yao Yuan,Jin Yanqiao,Cheng Xiansu,Lü Qiufeng
Cassava residue was liquefied by using ethylene glycol (EG), ethylene carbonate, propylene carbonate and polyethylene glycol (molecular weight: 400 g/mol) as the liquefaction reagent respectively at the temperature of 130–170 °C with sulfuric acid as the catalyst. The influences of liquefaction parameters, such as the type of liquefaction reagents, mass ratio of EG/cassava residue, liquefaction temperature and time on the properties of the products were discussed. The optimum liquefaction conditions were obtained when the mass ratio of EG/cassava residue was 6:1 ( w/w ), the liquefaction temperature was 150 °C, the liquefaction time was 3 h and the mass fraction of concentrated sulfuric acid/EG was 2.5wt%. The hydroxyl numbers and residue content of the liquefied products at optimal conditions were 1 137 mgKOH/g and 0.43%, respectively. FT-IR spectrum showed that the liquefaction product of cassava residue was polyether polyol and could be used to prepare polyurethane material or alkyd resins.
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 12
·13280-13287
·
IF 1.798
Liu Jingdong,Ji Hongjun,Wang Shuai,Li Mingyu
In this study, we present a new simple method using formic acid pretreatment to achieve low temperature sintering of Cu nanoparticles, and the Cu nanoparticles have been successfully prepared with a modified polyol method. For formic acid pretreatment, the spherical Cu nanoparticles with an average size of 30 nm were saturated with a mixed solution of formic acid and absolute ethanol directly. The surface composition analysis indicated that the initial oxide on the surface of Cu nanoparticles was completely removed, and formate was generated as a by-product which could decompose at low temperature. According to the thermal analysis results, it was found that the sintering temperature of Cu nanoparticles with formic acid pretreatment was reduced to 160 °C. And the corresponding microstructures further demonstrated that the emerging small exothermic peak of thermal curve over the temperature range between 120 and 160 °C was caused by the formation of sintering necks. The formic acid treated Cu nanoparticle films sintered at 260 and 320 °C exhibited an electrical resistivity of 6.1 and 3.6 μΩ cm respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Qinglong Luo,Mingzhe Dong,Chun Bai,Haining Liu,Zhijian Wu,Xiao Du,Jun Li,Xueli Huang
The complex and diverse forms of boron in aqueous solutions have presented a major challenge for boron separation. Boron can be chemically complexed with polyols to achieve the purpose of separation. It is of great significance to clarify the mechanism of polyol ligand capturing boron anion for optimizing the best ligand. The facile environmentally friendly functionalization of cotton linter polymer with amino-polyol was successfully demonstrated and resulted in essential polyhydroxy ligands containing amines for strong interactions with boron. The adsorption capacity of the boron adsorbents with the most –OH and N is up to 27.88 mg/g. The presence of the N, high vicinal diol content, and the branched structure all have a positive effect on the complexation efficiency. Optimization of the ligand structure is helpful to increase the boron uptake and it is of great significance to design the best adsorbent for boron separation from salt lake brine.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Yan Shi,Jingdan Li,Jing Wang,Tiantian Zhao,Hongmin Yang,Jianchun Jiang,Xiaoxiang Jiang
The liquefaction process of cellulose in polyhydric alcohols (PEG 400 and glycerol) was studied by TG-FTIR. Three stages were observed during the solvolysis process and the main liquefaction stage could be further divided into two zones. The differences of liquefaction behavior of cellulose in the two solvents were compared, and the functional groups of volatiles produced by solvolysis were also evaluated. A step-wise procedure based on iso-conversional and Master-plots methods was used for the kinetic and mechanism analysis of the main liquefaction stage. The calculation results based on the kinetic model were in agreement with the experimental data of the conversion rate. The kinetic parameters and mechanism functions between cellulose liquefaction in PEG400 and in glycerol were quite different, which verified that solvolysis behavior and reaction process were seriously influenced by solvent species. Finally, the detailed types of volatiles and product distribution were measured by Py–GC–MS.
研究领域:
化学工程
·
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Boning Su,Mingchuan Yang,Bin Gao,Xiangjie Zhao,Ziyao Li,Shugang Zhang,Dongdong Cheng,Tianlin Shen,Yuanyuan Yao,Yuechao Yang
The maturation of biobased polymer synthesis process has led to the rapid adoption of biobased controlled-release fertilizers (BCRFs). Despite this progress, the loose structure, low cross-linking density, and poor water repellency of current biobased coatings result in short controlled-release periods, which do not meet the long-term nutrient demands of crops throughout their reproductive phases. Moreover, existing modifications to address these issues often involve the addition of external additives, which can increase biotoxicity and cost. In this study, castor oil-based hyperbranched polyol (COHBPs) was synthesized from castor oil (CO) using a “one-pot method.” We report the development of high cross-linking density biobased hyperbranched polyurethane (COHBPPFs) as a coating for BCRFs. Gel content and SEM analysis demonstrated that COHBPPFs exhibited a high degree of cross-linking. Mechanical testing using an electronic universal testing machine, along with AFM results, highlighted the superior mechanical properties of COHBPPFs compared to traditional coatings. COHBPPFs significantly enhanced controlled release performance, with a 3% coating content providing nearly 50 days of controlled release, a marked improvement over conventional coatings. The controlled release mechanism of COHBPPFs was elucidated by modeling the cross-linking process of COHBPs with PAPI. This study offers a comprehensive examination of CRF coatings from multiple perspectives and provides valuable insights into the development of high cross-link density, environmentally friendly, and renewable biobased CRFs.
研究领域:
材料科学
·
农业科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zhongxin Xie,Zixuan Yang,Liangyong Chu,Kuan Chen,Liming Shen,Ningzhong Bao
Herein the Nano-epoxidized graphene oxide (NE-GO) was demonstrated to be used as a film-forming component to enhance the barrier properties of purely bio-basedepoxy coatings, composed of a Cardol bifunctional epoxy resin and a Cardanol-basedamine curing agent. AFM has been used to characterize the local cross-linking densityof the coatings. It was found that discontinuous high-crosslinking regions were formedsurrounded by low-crosslinking regions, which decreased the barrier and mechanicalproperties of the coatings. Atomically-dense NE-GO was proposed to be used as thefilm-forming components to achieve a high crosslinking density of purely bio-basedcoatings. FT-IR, AFM, Raman, and XPS have demonstrated the successful preparationof NE-GO. Contact angle, SEM, and electrochemical impedance spectroscopy (EIS)tests demonstrated that the NE-GO worked as a film-forming component to enhancethe cross-linking density of the coating. Compared to the pristine purely bio-basedcoating, the barrier performance (|Z|0.01 Hz) of the epoxy coating with NE-GO as theepoxy film-forming components increased by four orders of magnitude after soaking inNaCl solution (3.5 wt%) for 140 days. The strategy of using 2D, flexible, highlyfunctional, and high-dense GO with a tailored size as the epoxy film-formingcomponents may also be useful for other bio-based epoxy coatings.
研究领域:
材料科学
·
化学工程
·
生物基材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yongbin Wu,Shaobo Han,Yong Li,Wenjie Shen
Monodisperse gold-copper nanocubes and AuCu-cuprous sulfide (Cu 1.96 S) heterodimers were fabricated by a step-wise polyol reduction with the aid of oleylamine and 1-dodecanethiol. The geometric configuration was mediated by simply varying the Cu/Au atomic ratio: Au-Cu cubes with sizes of 6.4 and 4.3 nm were yielded at Cu/Au atomic ratios of 1/3 and 1/1, respectively; while AuCu-Cu 1.96 S heterodimer, consisting of a AuCu cube of 4.6 nm and a Cu 1.96 S sphere of 6.3 nm was obtained at Cu/Au atomic ratio of 3/1. Detailed structural analysis on the intermediate products, collected at different intervals during the synthesis, revealed that small-sized Au seeds formed at 423 K, followed by the growth of Cu and Cu 1.96 S crystals at 473 K. Oleylamine coordinated to Au 3+ and Cu 2+ and thus mediated the particle size; while 1-dodecanethiol bonded to Au 3+ and directed the cubic morphology. Excessive Cu 2+ , at the Cu/Au atomic ratio of 3/1, interacted with 1-dodecanethiol and formed Cu 1.96 S spherical particle that epitaxially grew over the AuCu cube, resulting in a heterodimer structure. Due to the enriched surficial Cu atoms and their electronic interactions with Au atoms, Au-Cu nanocubes and AuCu-Cu 1.96 S heterodimers showed pronounced activities for the catalytic reduction of 4-nitrophenol to 4-aminophenol with NaBH 4 at 298 K.
研究领域:
材料科学
·
纳米技术
·
化学工程
·
催化
✓ 已验证
DOI
PubMed
高影响因子
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