CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Ming Zhang,Chengyu Wang
A simple and facile method for fabricating the cotton fabric with superhydrophobicity and flame retardancy is described in the present work. The cotton fabric with the maximal WCA of 160° has been prepared by the covalent deposition of amino-silica nanospheres and the further graft with (heptadecafluoro-1,1,2,2-tetradecyl) trimethoxysilane. The geometric microstructure of silica spheres was measured by transmission electron microscopy (TEM). The cotton textiles before and after treatment were characterized by using scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The wetting behavior of cotton samples was investigated by water contact angle measurement. Moreover, diverse performances of superhydrophobic cotton textiles have been evaluated as well. The results exhibited the outstanding superhydrophobicity, excellent waterproofing durability and flame retardancy of the cotton fabric after treatment, offering a good opportunity to accelerate the large-scale production of superhydrophobic textiles materials for new industrial applications.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2017
·
IF 2.048
Yi Ding,Xinggui Long,Shuming Peng,Dong Zhang,Zhaoyi Tan,Xirui Lu
Zr 1− x − y Ce x Nd y O 2− y/ 2 ceramics, which were designed as waste form materials, were obtained by simultaneous substitution of Ce 4+ and Nd 3+ for Zr 4+ in ZrO 2 . The influences of the simultaneous substitution of Ce and Nd on phase transformation of ZrO 2 were investigated systematically. Also, the aqueous durability of the ceramics was evaluated. The results show that the phase transformation caused by the simultaneous substitution mainly relates to the total content of Ce and Nd. The ZrO 2 ceramics containing Ce + Nd < 30 mol% exhibit both monoclinic and cubic phases, while the ceramics containing Ce + Nd ≥ 30 mol% are cubic phase. And the cubic phase can be stabilized by incorporating 30 mol% Ce + Nd. Moreover, LR i are modified by the incorporation of Ce and Nd, because of the presence of oxygen vacancies . The Nd and Ce co-doped zirconia waste form exhibit excellent aqueous durability (∼10 −5 g m −2 d −1 ).
研究领域:
材料科学
·
核废料管理
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xiaodong Jin,Xiangyun Feng,Shufan Song,Shibing Sun,Wanfu Wang,Yichen Chen,Wufei Tang
An efficient flame retardant coating was developed for rigid polyurethane foam (RPUF) through the integration of layer-by-layer (LBL) self-assembly and UV curing. The RPUF surface was first activated by UV ozone to enable covalent grafting of branched polyethyleneimine (BPEI) as the initial layer. Subsequently, L-serine intercalated Kaolinite (K*aol), diethylene triamine penta (methylene phosphonic acid) (DTPMPA), and BPEI were alternately assembled to form two bilayers, followed by the application of a UV curing phosphorus/nitrogen-containing topcoat to construct a dense protective network. The optimized sample (R-K* 5 D 30 -P 8 N 3 ) exhibited a limiting oxygen index (LOI) of 36.9 % and achieved a V-0 rating in UL-94, accompanied by a 31.8 % reduction in peak heat release rate (pHRR) and a 30 % decrease in total smoke production compared to neat RPUF. Even after 12 h of water leaching, it maintained a LOI of 34.0 % and displayed a 300 % increase in time to ignition and 18.6 % reduction in pHRR compared with neat RPUF during cone calorimetry. The rapid formation of continuous physical barriers accounted for the enhanced flame retardancy, while UV curing immobilized the coating layers, imparting long-term water resistance. This facile “LBL plus UV curing” strategy provides an effective pathway toward robust, low-smoke, and flame retardant coatings for polymeric foams.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
·
2016
·
IF 1.956
Abbas Hasan Faris,Mohamad Nasir Mohamad Ibrahim,Afidah Abdul Rahim
Tannin-glyoxalated Kraft lignin (TGKL) resin is a successful substitution for phenol formaldehyde resin in the production of wood adhesives, however it has a poor water resistance. To overcome this obstacle, this research was focused on scalable adhesive through the modified tannin adhesive and oligomeric precursors of a hyperbranched poly (amine-ester) (HBPAE). The prepared glyoxalated Kraft lignin resin (MTGKL), TGKL, HBPAE and commercial phenol formaldehyde (CPF) resin were evaluated by FTIR , 1 H and 13 C NMR spectroscopy . The tensile strengths and thermal stability were determined. The results indicated that the addition of HBPAE to tannin adhesive could improve the water resistance of MTGKL. This was evident when soaking plywood bonded with TGKL in cool water, where delamination occurred, but it was not evident with MTGKL. The tensile results indicated that the adhesive strengths of MTGKL, 39.72 MPa (dry) and 27.62 MPa (wet), were higher compared to TGKL and CPF resins.
研究领域:
高分子材料
·
林产化学加工
·
胶体与界面科学
·
可持续材料
·
生物质转化
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 11
·115526
·
IF 1.449
Kuibao Zhang,Baozhu Luo,Haibin Zhang
In this study, zirconolite-based ceramic powder was firstly fabricated from combustion reaction route. CeO2 was introduced as the surrogate of tetravalent actinides, which was directly immobilized by the single-phase zirconolite waste matrice. The results demonstrate that the crystalline incorporation of CeO2 is highly depended on the sintering temperature. 10 wt% CeO2 was directly immobilized into the zirconolite crystal structure under 1250 °C sintering, where Ce concurrently occupies the Ca and Zr sites. Higher CeO2 incorporation (15–25 wt%) leads to the formation of Ce-rich impurity phase and phase transformation from 2M-zirconolite to 3T-zirconolite. The Ce-bearing zirconolite waste forms exhibit the highest density and hardness after sintering at 1400 °C for 12 h. The aqueous durability was evaluated, where the 42 days LRCe values are 1.68 × 10–6 and 6.85 × 10–6 gm−2d−1 before and after the leachate treatment using nitric acid.
研究领域:
材料科学
·
核废料管理
·
陶瓷
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2021
·
IF 9.028
Lingling Zhong,Liuqian An,Yu Han,Zhigao Zhu,Dongqing Liu,Dongmei Liu,Danye Zuo,Wei Wang,Jun Ma
Membrane distillation (MD) is a promising technology for treating the concentrated seawater discharged from the desalination process. Interconnected porous membranes, fabricated by additive manufacturing, have received significant attention for MD technology because of their excellent permeability. However, their poor hydrophobic durability induced by the deformation of pores constrains their water desalination performance. Herein, an in situ three-dimensional (3D) welding approach involving emulsion electrospinning is reported for fabricating robust nanofibrous membranes. The reported method is simple and effective for welding nanofibers at their intersections, and the reinforced membrane pores are uniform in the 3D space. The results show that the in situ 3D welded nanofibrous membrane, with a stability of 170 h and water recovery of 76.9%, exhibits better desalination performance than the nonwelded (superhydrophobic) nanofibrous membrane and the postwelded (superhydrophobic) nanofibrous membrane. Furthermore, the stability mechanism of the in situ 3D welded nanofibrous membrane and the two different wetting mechanisms of the nonwelded and postwelded nanofibrous membranes were investigated in the current work. More significantly, the in situ 3D welded nanofibrous membrane can further concentrate the actual concentrated seawater (121°E, 37°N) to crystallization, demonstrating its potential applications for the desalination of challenging concentrated seawater.
研究领域:
材料科学
·
环境工程
·
淡化技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Zongzheng Zuo,Shuxue Zhou
In this study, 2-(perfluorohexyl)ethyl methacrylate, hydroxyethyl methacrylate and methyl methacrylate were used to synthesize three random fluorinated polyacrylates with various fluorine contents ( i.e. , F1H1, F3H1, and F5H1) and one block fluorinated polyacrylate ( i.e. , PFPHM) through traditional radical polymerization and atom transfer radical polymerization, respectively. These copolymers were further adopted as hydrophobic additives to incorporate into 2K polyurethane (PU) clearcoats. Effect of the type and dosage of the fluorinated polyacrylate on the haze, surface hydrophobicity, outdoor hydrophobicity durability and dirt pick-up resistance (DPUR) of modified coatings were investigated. Fluorinated polyacrylate additive with higher fluorine content is easier to cause haze of 2K PU clearcoats, nevertheless, hydrophobic surface could be acquired at lower dosage, alleviating its negative effect on transparency. PFPHM showed extremely higher hydrophobicity modification efficiency compared to the random polyacrylate additive, due to its easy enrichment at the superficial layer of 2K PU clearcoats. Moreover, PFPHM-modified 2K PU coatings presented the best hydrophobicity durability and dirt pick-up resistance in outdoor exposure test. The loss of hydrophobicity outdoors was mainly due to the aging of PU matrix, loss of fluoroalkyl chains, and partially to the dirt adhesion.
研究领域:
高分子科学
·
材料工程
·
表面化学
·
涂料技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·470-479
·
IF 1.307
Xiang Huilin,Zhong Lingling,Ren Yongqing,Liu Dongmei,Zhu Zhigao,Xu Ying,Wang Yu,Wang Wei
W ater flux and hydrophobic durability play important roles in membrane distillation(MD) applications. Compared with the method of adsorbing nanoparticles by electrostatic adsorption, the surface roughness constructed by chemical bonding is more conducive to the performance of membrane. This paper reports a facile approach to fabricating superhydrophobic fluoroalkyl silane/polydimethylsiloxane@FeOOH@stabilized polyacrylonitrile(FAS/PDMS@FeOOH@SPAN) nanofibrous membrane(NFM) with outstanding hierarchical structures, aiming to achieve efficient and stable performance in MD. Electrospun polyacrylonitrile(PAN) membrane after peroxidation was chosen as the base membrane, followed by in-situ synthesis of iron oxyhydroxide and liquid-phase silanization. We tested the characteristics of FAS/PDMS@FeOOH@SPAN NFM in each preparation stage and its performance in direct contact membrane distillation(DCMD). The chemical bond between iron oxyhydroxide and the membrane is stronger, making the rough structure steady and dense. The FAS/PDMS@FeOOH@SPAN NFM exhibited a water contact angle of 155.4° and excellent hydrophobicity towards different pollutants. Besides, it showed satisfied properties with a water flux of 24.7 L·m −2 ·h −1 , a high salts rejection of ca. 100% and an extended-term stability in DCMD using hypersaline water(10%, mass ratio). It is believed that this novel study proposes a universal and efficient method to fabricate a superhydrophobic surface and has great potential for high-salinity wastewater treatment in MD.
研究领域:
材料科学
·
环境工程
·
水处理
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）