周树学
有机-无机纳米复合(或杂化)涂层的制备、结构与性能、纳米粒子的分散与官能化、高性能树脂的合成及其在涂料中的应用、功能涂层制备等。
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- 姓名:周树学
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博士生导师
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学科领域:
材料科学基础学科
- 研究兴趣:有机-无机纳米复合(或杂化)涂层的制备、结构与性能、纳米粒子的分散与官能化、高性能树脂的合成及其在涂料中的应用、功能涂层制备等。
周树学,博士,教授,博导,1973年8月生,浙江桐乡人。1995年6月获浙江大学化工系高分子化工专业工学学士学位, 2000年10月获浙江大学高分子系高分子材料专业工学博士学位,2002年9月复旦大学材料科学与工程博士后流动站出站,其后留校于复旦大学材料系工作至今,任讲师(2002)、副教授(2003)和教授(2008);2006年5月至2007年6月作为德国洪堡学者,在德国著名的Max Planck Institute of Colloids and Interfaces从事为期一年合作研究。曾获复旦大学世纪之星(2003)、复旦大学优秀博士后(2006)、教育部新世纪人才(2007)、上海市青年科技启明星(2008)和上海市曙光学者(2009)等荣誉称号,作为第二完成人获国家技术发明二等奖1项、上海市科技进步一等奖(发明类)2项、教育部科技进步一等奖(发明类)2项和中国石油与化学工业协会(原化工部)科技进步一等奖1项。已累计发表论文131篇,其中包括先后在Advanced Materials、Chemistry of Materials、Macromolecules、Journal of Physics Chemistry B、Small、Langmuir、Polymer、Thin Solid Films、Progress in Organic Coatings等国际著名学术刊物上发表SCI论文94篇,它引543次(截止2009年10月),H指数16,撰写英文书《ACS Symposium Series No. 1002/Smart Coatings II》第10章。申请专利25项,其中已授权17项(包括1项美国专利)。目前,主要从事的研究方向有:有机-无机纳米复合(或杂化)涂层的制备、结构与性能、纳米粒子的分散与官能化、高性能树脂的合成及其在涂料中的应用、功能涂层制备等。
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周树学, Kaiqing Luo, Shuxue Zhou*, Limin Wu
K. Luo et al./Thin Solid Films 517(2009)5974-5980,-0001,():
-1年11月30日
UV-curable zirconia (ZrO2) nanoparticle coatings, prepared by dispersing highly-crystalline zirconia nanoparticles (4 nm) in tetrahydrofuran with the aid of 3-glycidoxypropyltrimethoxysilane (GPTMS) and following addition of a cationic photoinitiator, were cast on silicon wafers (or glass substrates) by dip-coating or spin-coating and photopolymerized to get transparent ZrO2 nanoparticle films. Ellipsometrical characterization indicates that the refractive index of the film changes from 1.63 to 1.77 at wavelength of 632nm when the molar ratio of GPTMS-to-ZrO2 decreases from 0.30 to 0.15. Nano-indentation tests show that the films exhibit robust mechanical performance though they are not heat-treated.
Zirconia Nanoparticle film Refractive index Microhardness
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周树学, Kun Xu, Shuxue Zhou∗, LiminWu
K. Xu et al./Progress in Organic Coatings 65(2009)237-245,-0001,():
-1年11月30日
The photopolymerization kinetics of poly(urethane-acrylate)/zirconia (PUA/ZrO2) nanocomposite coatings were monitored on-line and in-real-time with microdielectrometry (DEA) in terms of logarithmic ion viscosity (log). For comparison, real-time infrared spectroscopy (RTIR) was also employed to determine the evolution of C=C bond conversion (C) with irradiation time (t). Coupling log-t curves with C-t curves indicates that the relationship between log and C for all the coatings with different formulations (i.e. the type of photoinitiator, ZrO2 content) and curing condition (i.e. irradiation intensity) can be correlated to one linear equation at conversion less than ∼85%. Moreover, DEA monitoring was longer time to reach polymerization equilibrium than RTIR for those cases with high limited conversion, suggesting that the former is more sensitive to C=C bond conversion than RTIR at high conversion stage (C>∼85%). DEA monitoring on the photopolymerization kinetics of PUA/ZrO2 coatings as a function of various parameters further demonstrates that DEA results are reliable and reasonable to conventional radical photopolymerization. It is believed that DEA technique will be useful not only on the optimization of curing condition but also for the formulation of UV-curable coatings.
On-line and in-real-time monitoring Photopolymerization Microdielectometry (, DEA), Nanocomposites Coatings
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周树学, Bo You, NangengWen, Yichen Cao, Shuxue Zhou∗ and Limin Wu
Polym Int 2009; 58: 519-529,-0001,():
-1年11月30日
BACKGROUND: Polyacrylate/silica nanocomposite latexes have been fabricated using blending methods with silica nanopowder, in situ polymerization with surface-functionalized silica nanoparticles or sol-gel processes with silica precursors. But these approaches have the disadvantages of limited silica load, poor emulsion stability or poor film-forming ability.
nanocomposite, emulsion polymerization, acrylic polymer, colloidal nanosilica
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周树学, Kun Xu · Shuxue Zhou · Limin Wu
J Mater Sci(2009)44: 1613-1621,-0001,():
-1年11月30日
Highly crystalline and dispersible zirconia nanoparticles, ex situ synthesized from a solvothermal reaction of zirconium(IV) isopropoxide isopropanol complex in benzyl alcohol, were functionalized with 3-(trimethoxysilyl)propyl methacrylate and blended with UV-curable urethane-acrylate formulations to fabricate poly(urethane-acrylate)/zirconia (PUA/ZrO2) nanocomposite coatings. A critical ZrO2 concentration of 20 wt% was observed for the evolutions of both the structure and properties of the nanocomposites as a function of ZrO2 content. Below the critical concentration, completely transparent nanocomposite film was obtained and the nanocomposites exhibited increasing final carbon-carbon double bond conversion, refractive index, hardness, elastic modulus, and thermal stability as ZrO2 content increased. However, serious agglomeration of ZrO2 nanoparticles occurred at 25 wt% of ZrO2, which decreased final conversion, transparency and hardness, and thermal stability of the nanocomposite film. These results clearly reveal that the performance of UV-curable anocomposites is strongly dependent on the dispersion of nanoparticles.
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周树学, Yiqing Hu, Shuxue Zhou*, Limin Wu
Y. Hu et al./Polymer 50(2009)3609-3616,-0001,():
-1年11月30日
Poly(methyl methacrylate)/zirconia (PMMA/ZrO2) nanocomposites with ZrO2 content as high as 15 wt% were prepared by modifying non-aqueous synthesized ZrO2 nanoparticles with methacryloxypropyltrimethoxysilane (MPS) in tetrahydrofuran, dispersing MPS-functionalized ZrO2 nanoparticles in MMA and following in situ bulk polymerization with controlled pre-polymerization time. The MPS-functionalized ZrO2 nanoparticles showed an efficient crosslinking role in the polymerization, leading to a complete gel of PMMA at 5 wt% of ZrO2 content. Homogeneous dispersion of the ZrO2 nanoparticles at primary particle size level was observed in all nanocomposites, which results in good clarity of the obtained nanocomposites. Hardness tests (pendulum hardness tests and indentation tests) and antiscratch tests (abrasion tests and nano scratch tests) were employed to probe the surface mechanical properties of the nanocomposites. The properties of nanocomposites as a function of ZrO2 content, revealing from various characterization techniques, are not consistent and discussed in detail. At low ZrO2 content, the mechanical properties are enhanced by the formed crosslinking structure. However, remarkable improvements of hardness and scratch resistance of PMMA were achieved when 15 wt% of ZrO2 content was embedded.
Poly(, methyl methacrylate), Zirconia nanoparticles Mechanical property
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【期刊论文】Fabrication of Ordered Porous Polymer Film via a One-Step Strategy and Its Formation Mechanism
周树学, Shiling Zhang, Shuxue Zhou, Bo You, and Limin Wu*
Macromolecules 2009, 42, 3591-3597,-0001,():
-1年11月30日
In this paper, a series of colloidal polymers with various Tg, composition, and sphere size were synthesized by surfactant-free emulsion polymerization and dispersion polymerization methods and then blended with colloidal silica particles to obtain polymer/silica nanocomposite latexes. When these nanocomposite latexes were forced dry at high temperature (e.g., 110℃) for 2h, a three-dimensional ordered porous structure was directly obtained. Neither complex processes nor removal of any templates like in a templating method is needed. These ordered pores should form from the top surface and then propagate layer by layer from the top surface to substrate.
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周树学, Kaiqing Luo, Shuxue Zhou, * Limin Wu, and Guangxin Gu
Langmuir 2008, 24, 11497-11505,-0001,():
-1年11月30日
Zirconia (ZrO2) nanocrystals, synthesized from zirconium(IV) isopropoxide isopropanol complex and benzyl alcohol, were dispersed and functionalized in organic solvents using three kinds of bifunctional silane coupling agents (SCAs), 3-glycidoxypropyltrimethoxysilane (GPTMS), 3-aminopropyltriethoxysilane (APTES), and 3-isocyanatopropyltriethoxysilane (IPTES). Completely transparent ZrO2 dispersions were achieved in tetrahydrofuran (THF) with all three SCAs, in pyridine and toluene with APTES and IPTES, and in N,N-dimethylformamide with IPTES. Dynamic laser scattering (DLS) measurements and high-resolution transmission electron microscopical (HRTEM) observation indicated that the ZrO2 nanocrystals are dispersed on a primary particle size level. Fourier transform infrared spectroscopy, solid-state 13C-and 29Si NMR spectroscopy, and thermogravimetric analysis demonstrated that all three SCAs are chemically attached to the surface of the ZrO2 nanoparticles, however, in different bonding modes. Except for GPTMS/ ZrO2/THF dispersion and IPTES/ZrO2/pyridine dispersion, all other transparent dispersions have poor long-term stability. The increasing polarity, due to high amount of APTES attached and high hydrolysis and condensation degree of the bonded APTES, and the aggregation, due to interparticle coupling via the bonded triethoxysilyl group, are the causes of the poor long-term stability for the ZrO2 dispersions with APTES and IPTES, respectively. Nevertheless, the APTES-functionalized ZrO2 precipitates can be deagglomerated in water to get a stable and transparent aqueous ZrO2 dispersion via addition of a little hydrochloric acid.
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【期刊论文】Phase Separation and Properties of UV-Curable Polyurethane/Zirconia Nanocomposite Coatings
周树学, Shuxue Zhou, * Limin Wu
Macromol. Chem. Phys. 2008, 209, 1170-1181,-0001,():
-1年11月30日
Transparent zirconia (ZrO2) nanocrystal dispersions in butyl acetate (BAc) or tetrahydrofuran (THF) were prepared by functionalizing zirconia nanocrystals, synthesized from a solvothermal reaction of zirconium (IV) isopropoxide isopropyl alcohol complex in benzyl alcohol, with 3-methacryloxypropyltrimethoxysilane (MPS), and were embedded into UV-curable polyurethane (PU) coatings. It was found that the ZrO2 concentration was the dominating factor influencing the transparency of the ZrO2 dispersion, while the molar ratio of MPS to ZrO2 was rather efficient in adjusting the amount of MPS attached. Phase separation of the ZrO2 nanocrystals in polyurethane coatings was observed, and was strongly related to the MPS-modified ZrO2 (MPS-ZrO2) content and the amount of MPS chemically bonded. The phase separation of the PU/ZrO2 nanocomposite coatings appeared more seriously for higher MPS-ZrO2 content and higher amounts of MPS attached; thus the transparency of the nanocomposite coatings was lower. However, completely transparent PU/ZrO2 nanocomposite coatings could be still achieved even with a ZrO2 content up to 7.5 wt.-% using a ZrO2/BAc dispersion. Improvements in pendulum hardness, microhardness and scratch resistance of the polyurethane coatings via addition of MPS-ZrO2 were demonstrated, but were not remarkable because of the low cross-linking efficiency of the MPS-ZrO2 nanoparticles resulting from the poor compatibility of the MPS-ZrO2 nanoparticles with the pure PU oligomers.
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周树学, Yang Zhang, Bo You, Huang Huang, Shuxue Zhou, Limin Wu, Anupama Sharma
Journal of Applied Polymer Science, Vol. 109, 2434-2441(2008),-0001,():
-1年11月30日
Waterborne adhesives are extremely environment-friendly but unfortunately deficient in mechanical properties. In this article, nanosilica, stemming from tetraethyl orthosilicate (TEOS), silica sol, and/or fumed silica powder, was employed to reinforce the waterborne silylated polyether adhesives. Effects of TEOS content, silica sol content, and the type and content of fumed silica on the shear strength of the adhesive were investigated using a scanning electronic microscope and an electronic instron tester and the strengthening mechanisms of different silica source were discussed. All the shear strengths of silylated polyether adhesives first increased and then decreased as TEOS content, silica sol content or fumed silica content increased. Colloidal silica particles was less efficient than fumed silica particles for reinforcing the polyether adhesive but can increase the shear strength of hydrophobic fumed silica embedded adhesive. Comparing the adhesives with the hydrophilic fumed silica (HS-5) or the extremely hydrophobic fumed silica (TS-720), the adhesive with moderate hydrophobic fumed silica (TS-610) had the highest shear strength. The maximal shear strength of 2.5 MPa was achieved when TEOS, silica sol, and fumed silica were combined. It seemed that TEOS, silica sol, and fumed silica played crosslinking (with polyether chain), dispersing (for fumed silica), and reinforcing roles on waterborne adhesive, respectively. This reinforcing mechanism opened a new way to fabricate waterborne adhesives (or coatings) with high performances.
waterborne adhesive, polyether emulsion, nanosilica sol, fumed silica
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【期刊论文】Facile Method for Fabrication of Nanocomposite Films with an Ordered Porous Surface
周树学, Bo You, † Nangen Wen, † Shuxue Zhou, † Limin Wu, *, † and Dongyuan Zhao‡
J. Phys. Chem. B 7706 2008, 112, 7706-7712,-0001,():
-1年11月30日
This paper presents a novel and facile method for the fabrication of nanocomposite films with ordered porous surface structures. In this approach, a water-borne poly(styrene-co-butyl acrylate-co-acrylic acid)/silica nanocomposite dispersion was synthesized in situ by surfactant-free emulsion polymerization by using 3-allyloxy-2-hydroxy-1-propanesulfonate as a polymerizable surfactant. When this dispersion was dried to form a film at a certain temperature, an ordered porous structure could be directly obtained on the surface of the nanocomposite film. SEM, TEM, and AFM were employed to observe the morphology, and XPS and particle analyzer were used to analyze the surface composition of the ordered porous nanocomposite film and the particle size, respectively.
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