Jinlian Hu - Academia.edu (original) (raw)

Papers by Jinlian Hu

Journal of Nanoscience and Nanotechnology

Thin and thick Ag films on SiO2 substrates (mesoporous SiO2 and Soda-lime glass) were respectivel... more Thin and thick Ag films on SiO2 substrates (mesoporous SiO2 and Soda-lime glass) were respectively prepared by thermal evaporation and spin-coating. The evolution of surface plasmon resonance absorption of the as-prepared samples was investigated when alternately heated in air and H2. It has been shown that the evolution behaviours were very different with Ag film thickness and substrates. The results were explained in terms of subtle difference of the two SiO2-based substrates in micro-structure or chemical composition, the redox of silver and relative Ag content.

Composites Part A: Applied Science and Manufacturing, 2015

Journal of Materials Science, 2014

2010 8th International Vacuum Electron Sources Conference and Nanocarbon, 2010

Diluted magnetic semiconductors (DMSs) such as transition metal TM-doped ZnO and TiO2 are attract... more Diluted magnetic semiconductors (DMSs) such as transition metal TM-doped ZnO and TiO2 are attracting more and more attention due to their promising applications in spintronic devices. Ferromagnetism (FM) in these materials is often associated with ether free carriers or structural defects. Recently, it has been reported that codoping with hydrogen could be an effective way to tune the concentration of

Journal of Molecular Modeling, 2000

A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material... more A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material properties were tested by dynamic mechanical analysis (DMA) and Instron, and simulated using fully atomistic molecular dynamics (MD). The glass transition temperature (T g) of SMPU60 determined by DMA is 316 K, which is slightly lower than that estimated through MD simulations (T g = 328 K) , showing

Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry - VRCAI '11, 2011

Knitted fabrics are widely used in clothing because of their elasticity, comfort and recovery pro... more Knitted fabrics are widely used in clothing because of their elasticity, comfort and recovery properties as well as diversity in pattern design and texture. Up of one yarn only. Creating a knitted pattern, especially a hand knitted pattern is a cumbersome task in the textile industry. In this paper, we extend our previous try on composition of weaving pattern by

Journal of molecular modeling, 2012

A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material... more A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material properties were tested by dynamic mechanical analysis (DMA) and Instron, and simulated using fully atomistic molecular dynamics (MD). The glass transition temperature (T (g)) of SMPU60 determined by DMA is 316 K, which is slightly lower than that estimated through MD simulations (T (g) = 328 K) , showing the calculated T ( g ) is in good agreement with experimental data. A complex hydrogen bonding network was revealed with the calculation of radial distribution functions (RDFs). The C═O⋯H bond is the predominant hydrogen-bonding interaction. With increasing temperature, both the hydrogen bonding and the moduli decreased, and the dissociation of intermolecular hydrogen bonding induced the decrease of the moduli.

ABSTRACT SMPU (shape memory polyurethane) non-ionomers and ionomers, synthesized with poly(ε-capr... more ABSTRACT SMPU (shape memory polyurethane) non-ionomers and ionomers, synthesized with poly(ε-caprolactone) (PCL), 4, 4′-diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), dimethylolpropionic acid (DMPA) were measured with cyclic tensile test and strain recovery test. The relations between the structure and shape memory effect of these two series were studied with respect to the ionic group content and the effect of neutralization. The resulting data indicate that, with the introduction of asymmetrical extender, the stress at 100% elongation is decreased for PU non-ionomer and ionomer series, especially lowered sharply for non-ionomer series; the fixation ratio of ionomer series is not affected obviously by the ionic group content; the total recovery ratio of ionomer series is decreased greatly. After sufficient relaxation time for samples stretched beforehand, the switching temperature is raised slightly, whereas the recovery ratio measured with strain recovery test method is lowered with increased DMPA content. The characterization with FT-IR, DSC, DMA elucidated that, the ordered hard domain of the two series is disrupted with the introduction of DMPA which causes more hard segments to dissolve in soft phase; ionic groups on hard segment enhance the cohesion between hard segments especially at high ionic group content and significantly facilitate the phase separation compared with the corresponding non-ionomer at moderate ionic group content.

Journal of Materials Chemistry C, 2013

The Journal of Physical Chemistry C, 2009

ABSTRACT The surface plasmon resonance (SPR) optical absorption of Ag nanoparticles loaded in mes... more ABSTRACT The surface plasmon resonance (SPR) optical absorption of Ag nanoparticles loaded in mesoporous SiO2 (with fairly low Ag content, about 0.14 wt %) have been investigated after the nanoparticles were heated in or exposed to various atmospheres (i.e., air, H2, water vapor, Ar, and H2S). Unexpectedly, the SPR optical absorption can completely disappear in quite a short time or intensively emerge or drastically change into semiconductor optical absorption edge. Surprisingly, the SPR switches are well reversible and very rapid when alternating treatment of samples in any two atmospheres mentioned above. In addition, those novel and distinctive SPR changes reflect a series of abnormal chemical redox behaviors in various atmospheres. The mechanisms have been discussed based on modeling multi-interactions between the mesoporous SiO2 matrix, Ag nanoparticles, and atmospheres, revealing a special surface/interface synergetic effect that induces many novel phenomena despite SiO2 usually being regarded as a chemical inert medium to noble metals and environmental atmospheres. Our new findings for such a simple Ag/SiO2 system, smart, reversible, and rapid SPR responses to various atmospheres, are highly valuable for SPR gas sensor, optical switch, and other SPR optics and give a new understanding of the catalysis and surface/interface chemistry in the Ag/SiO2 system.

2009 8th IEEE International Conference on Cognitive Informatics, 2009

In current textile design, fabric weave pattern indexing and searching require extensive manual o... more In current textile design, fabric weave pattern indexing and searching require extensive manual operations. The manual weave pattern classification is not sufficient to give the accurate and precise result and it is time-consuming. There is no such research to index and search for weave pattern specially. In this paper we propose a method to index and search weave patterns. We

Journal of Zhejiang University SCIENCE A, 2007

A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knit... more A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knitting fabric is presented in this paper. Three SMPU knitted fabrics series with different content of SMPU fibers: 100% SMPU, 50% SMPU and 50% cotton, 16% SMPU and 84% cotton are designed and manufactured in our lab. Their shape memory behaviors at different temperatures are characterized in

The Journal of Physical Chemistry C, 2012

The Journal of Physical Chemistry B, 2006

The Journal of Physical Chemistry B, 2005

Textile Research Journal, 2011

Smart Materials and Structures, 2006

Smart Materials and Structures, 2012

Smart Materials and Structures, 2011

Fabricating smart materials has been an attractive research topic in recent years. In this study,... more Fabricating smart materials has been an attractive research topic in recent years. In this study, a series of pyridine-containing shape memory polyurethanes (Py-SMPUs) with different pyridine contents were synthesized. Based on the theoretical analysis, the structure and morphology of Py-SMPUs were studied systematically with FT-IR, DSC, WAXD, DMA, AFM, etc. Results show that a hydrogen-bonded supramolecular structure is formed in the Py-SMPUs. Hydrogen bonds present in the urethane group and pyridine ring are the most favorable hydrogen bonds which play an important role in the movement of the polymer chain. Microphase separation consisting of a soft phase and hard phase occurs in the Py-SMPUs. The soft phase is influenced greatly by the N, N-bis(2-hydroxyl ethyl) isonicotinamide (BINA) unit and the hard phase is mainly a result of the hexamethylene diisocyanate and 1,4-butanediol (HDI-BDO) units. As the BINA content decreases, the soft phase tends to change gradually from a continuous amorphous phase to a droplet-like dispersion phase, whereas the hard phase develops from a droplet-like dispersion amorphous phase to a continuous crystalline phase.

Journal of Nanoscience and Nanotechnology

Thin and thick Ag films on SiO2 substrates (mesoporous SiO2 and Soda-lime glass) were respectivel... more Thin and thick Ag films on SiO2 substrates (mesoporous SiO2 and Soda-lime glass) were respectively prepared by thermal evaporation and spin-coating. The evolution of surface plasmon resonance absorption of the as-prepared samples was investigated when alternately heated in air and H2. It has been shown that the evolution behaviours were very different with Ag film thickness and substrates. The results were explained in terms of subtle difference of the two SiO2-based substrates in micro-structure or chemical composition, the redox of silver and relative Ag content.

Composites Part A: Applied Science and Manufacturing, 2015

Journal of Materials Science, 2014

2010 8th International Vacuum Electron Sources Conference and Nanocarbon, 2010

Diluted magnetic semiconductors (DMSs) such as transition metal TM-doped ZnO and TiO2 are attract... more Diluted magnetic semiconductors (DMSs) such as transition metal TM-doped ZnO and TiO2 are attracting more and more attention due to their promising applications in spintronic devices. Ferromagnetism (FM) in these materials is often associated with ether free carriers or structural defects. Recently, it has been reported that codoping with hydrogen could be an effective way to tune the concentration of

Journal of Molecular Modeling, 2000

A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material... more A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material properties were tested by dynamic mechanical analysis (DMA) and Instron, and simulated using fully atomistic molecular dynamics (MD). The glass transition temperature (T g) of SMPU60 determined by DMA is 316 K, which is slightly lower than that estimated through MD simulations (T g = 328 K) , showing

Proceedings of the 10th International Conference on Virtual Reality Continuum and Its Applications in Industry - VRCAI '11, 2011

Knitted fabrics are widely used in clothing because of their elasticity, comfort and recovery pro... more Knitted fabrics are widely used in clothing because of their elasticity, comfort and recovery properties as well as diversity in pattern design and texture. Up of one yarn only. Creating a knitted pattern, especially a hand knitted pattern is a cumbersome task in the textile industry. In this paper, we extend our previous try on composition of weaving pattern by

Journal of molecular modeling, 2012

A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material... more A type of shape memory polyurethane with 60 wt% hard segments (SMPU60) was prepared. Its material properties were tested by dynamic mechanical analysis (DMA) and Instron, and simulated using fully atomistic molecular dynamics (MD). The glass transition temperature (T (g)) of SMPU60 determined by DMA is 316 K, which is slightly lower than that estimated through MD simulations (T (g) = 328 K) , showing the calculated T ( g ) is in good agreement with experimental data. A complex hydrogen bonding network was revealed with the calculation of radial distribution functions (RDFs). The C═O⋯H bond is the predominant hydrogen-bonding interaction. With increasing temperature, both the hydrogen bonding and the moduli decreased, and the dissociation of intermolecular hydrogen bonding induced the decrease of the moduli.

ABSTRACT SMPU (shape memory polyurethane) non-ionomers and ionomers, synthesized with poly(ε-capr... more ABSTRACT SMPU (shape memory polyurethane) non-ionomers and ionomers, synthesized with poly(ε-caprolactone) (PCL), 4, 4′-diphenylmethane diisocyanate (MDI), 1,4-butanediol (BDO), dimethylolpropionic acid (DMPA) were measured with cyclic tensile test and strain recovery test. The relations between the structure and shape memory effect of these two series were studied with respect to the ionic group content and the effect of neutralization. The resulting data indicate that, with the introduction of asymmetrical extender, the stress at 100% elongation is decreased for PU non-ionomer and ionomer series, especially lowered sharply for non-ionomer series; the fixation ratio of ionomer series is not affected obviously by the ionic group content; the total recovery ratio of ionomer series is decreased greatly. After sufficient relaxation time for samples stretched beforehand, the switching temperature is raised slightly, whereas the recovery ratio measured with strain recovery test method is lowered with increased DMPA content. The characterization with FT-IR, DSC, DMA elucidated that, the ordered hard domain of the two series is disrupted with the introduction of DMPA which causes more hard segments to dissolve in soft phase; ionic groups on hard segment enhance the cohesion between hard segments especially at high ionic group content and significantly facilitate the phase separation compared with the corresponding non-ionomer at moderate ionic group content.

Journal of Materials Chemistry C, 2013

The Journal of Physical Chemistry C, 2009

ABSTRACT The surface plasmon resonance (SPR) optical absorption of Ag nanoparticles loaded in mes... more ABSTRACT The surface plasmon resonance (SPR) optical absorption of Ag nanoparticles loaded in mesoporous SiO2 (with fairly low Ag content, about 0.14 wt %) have been investigated after the nanoparticles were heated in or exposed to various atmospheres (i.e., air, H2, water vapor, Ar, and H2S). Unexpectedly, the SPR optical absorption can completely disappear in quite a short time or intensively emerge or drastically change into semiconductor optical absorption edge. Surprisingly, the SPR switches are well reversible and very rapid when alternating treatment of samples in any two atmospheres mentioned above. In addition, those novel and distinctive SPR changes reflect a series of abnormal chemical redox behaviors in various atmospheres. The mechanisms have been discussed based on modeling multi-interactions between the mesoporous SiO2 matrix, Ag nanoparticles, and atmospheres, revealing a special surface/interface synergetic effect that induces many novel phenomena despite SiO2 usually being regarded as a chemical inert medium to noble metals and environmental atmospheres. Our new findings for such a simple Ag/SiO2 system, smart, reversible, and rapid SPR responses to various atmospheres, are highly valuable for SPR gas sensor, optical switch, and other SPR optics and give a new understanding of the catalysis and surface/interface chemistry in the Ag/SiO2 system.

2009 8th IEEE International Conference on Cognitive Informatics, 2009

In current textile design, fabric weave pattern indexing and searching require extensive manual o... more In current textile design, fabric weave pattern indexing and searching require extensive manual operations. The manual weave pattern classification is not sufficient to give the accurate and precise result and it is time-consuming. There is no such research to index and search for weave pattern specially. In this paper we propose a method to index and search weave patterns. We

Journal of Zhejiang University SCIENCE A, 2007

A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knit... more A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knitting fabric is presented in this paper. Three SMPU knitted fabrics series with different content of SMPU fibers: 100% SMPU, 50% SMPU and 50% cotton, 16% SMPU and 84% cotton are designed and manufactured in our lab. Their shape memory behaviors at different temperatures are characterized in

The Journal of Physical Chemistry C, 2012

The Journal of Physical Chemistry B, 2006

The Journal of Physical Chemistry B, 2005

Textile Research Journal, 2011

Smart Materials and Structures, 2006

Smart Materials and Structures, 2012

Smart Materials and Structures, 2011

Fabricating smart materials has been an attractive research topic in recent years. In this study,... more Fabricating smart materials has been an attractive research topic in recent years. In this study, a series of pyridine-containing shape memory polyurethanes (Py-SMPUs) with different pyridine contents were synthesized. Based on the theoretical analysis, the structure and morphology of Py-SMPUs were studied systematically with FT-IR, DSC, WAXD, DMA, AFM, etc. Results show that a hydrogen-bonded supramolecular structure is formed in the Py-SMPUs. Hydrogen bonds present in the urethane group and pyridine ring are the most favorable hydrogen bonds which play an important role in the movement of the polymer chain. Microphase separation consisting of a soft phase and hard phase occurs in the Py-SMPUs. The soft phase is influenced greatly by the N, N-bis(2-hydroxyl ethyl) isonicotinamide (BINA) unit and the hard phase is mainly a result of the hexamethylene diisocyanate and 1,4-butanediol (HDI-BDO) units. As the BINA content decreases, the soft phase tends to change gradually from a continuous amorphous phase to a droplet-like dispersion phase, whereas the hard phase develops from a droplet-like dispersion amorphous phase to a continuous crystalline phase.