• Textile Coloration and Finishing
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• v.26 no.4
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• pp.322-330
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• 2014

The phospholipid-based MPCE(2-Methacryloxyethyl Phosphoryl Chlorine) copolymer was mixed with wet polyurethane for coating of nylon fabrics. The substitution rate of water in coagulation bath with DMF was changed under control of the size of formed hydrophilic microporous cell enable to manufacture excellent breathable, anti-bacterial and moisture control fabrics. Biocompatible property, vapor permeability, hydrostatic pressure, moisture management and anti-bacterial property were investigated for treated nylon fabrics. In result, increased moisture transmission rates, decreased water resistance and outstanding moisture control property could be confirmed by enhanced hydrophilicity of wet-coated nylon fabric with MPCE copolymer.

• Applied Science and Convergence Technology
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• v.25 no.1
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• pp.7-14
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• 2016

Nanoplasmonics is a developing field that offers attractive optical, electrical, and thermal properties for a wide range of potential applications. Based on the compelling characteristics of this field, researchers have shed light on the possibilities of integrated photonics and biosensing platforms using nanoplasmonic principles. Single and unique nanostructures with plasmons can act as individual transducers that convert desired information into measurable and readable signals. In this review, we will discuss nanoplasmonic sensors, especially those in relation to photodetectors for future optical interconnects, and bioinformation sensing platforms based on nanoplasmonics, thus providing a viable approach by which to create sensors corresponding to target applications. In addition, we also discuss scalable fabrication processes for the creation of unconventional nanoplasmonic devices, which will enable next-generation plasmonic devices for wearable, flexible, and biocompatible systems.

• Journal of Pharmaceutical Investigation
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• v.26 no.3
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• pp.201-205
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• 1996

Poloxamer, block copolymers of ethylene oxide and propylene oxide was crosslinked by diisocyanates and triisocyanates to form water-swellable, physically strong, rubber-like elastic, high biocompatible polyurethanes. The isocyanate-hydroxyl stoichiometry was kept 1:1, but the crosslinking density was varied. The variations examined were the ratio of diisocyanate and triisocyanate. The delivery of two drugs of different water solubilities from hydrogel matrices was studied. It appeared that the drug nature greatly influenced its release kinetics possibly due to drug-polymer interactions. The release profiles, however, could be modified to a great extent by adjusting the polymer network structure Generally the high crosslinking density was required for prolonged drug delivery.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2015.11a
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• pp.341-342
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• 2015

3D printer는 현재 세계적으로 시장이 확대됨에 따라 다방면으로 연구가 진행되고 있다. 이중에서 3DP (Three Dimensional Printing) 방식은 석고타입의 분말 powder가 도포된 층 위에 binder가 잉크젯 헤드를 통해 분사되어 powder 층과 층 사이를 붙여가며 형상을 제작하는 적층 방식의 일종이다. 반면 한정된 소재와 비싼 가격 때문에 보편적으로 사용하기에 한계가 있으며 대부분의 소재가 인체 유해한 성질을 보유하고 있어 활용 범위가 제한적이다. 본 연구에서는 인체 무해하고 다양한 기능이 내재된 생체 친화용 기능성 소재를 개발하고 3DP 방식의 프린터 제작을 통해 생체 친화적 기능성 형상을 제작하는 기술을 개발하였다.

• Proceedings of the Korean Fiber Society Conference
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• 2003.10b
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• pp.74-75
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• 2003

Recently, people are gradually concerned about environmental issue, bionics, environmental-friendly or biocompatible materials. Poly(vinyl alcohol) (PVA) is suitable for these materials, because it is typically water-soluble polymer that have linear-flexible chains, a material of no toxicity for human, and biodegradable polymer[1]. One of the most effective factors that dominate the properties of PVAs is tacticity. (omitted)

• 연구논문집
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• s.33
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• pp.157-165
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• 2003

New titanium alloys with a low elastic modulus have been developed for biomedical applications to avoid the stress shielding effect of the artificial prosthesis. The newly developed alloys contained the transition elements like Zr, Hf, Nb, Ta which were non-cytotoxicity elements and $\beta$ stabilizers. In the present paper the elastic moduli of Ti-xM containing Zr, Hf, Nb, Ta were evaluated by measuring the acoustic velocity (PEG). The effectiveness of the alloying elements for lowering the elastic modulus was investigated. In addition, the dominant factors for the low modulus were discussed. Ta was the most effective in lowering the elastic modulus of the alloys. The effectiveness of Hf was not acceptable for decreasing the elastic modulus. The dominant factor was the lattice parameter for Zr, and the poisson's ratio for Nb, Ta, respectively.

• Clean Technology
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• v.14 no.4
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• pp.242-247
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• 2008

Poly(N-vinyl-2-pyrrolidone) (PVP) has been used as biocompatible and biodegradable polymer in cosmetics, pharmaceuticals and electronics. Micro-particles of PVP were produced using an aerosol solvent extraction system (ASES). Dichloromethane (DCM) and supercritical carbon dioxide were used as solvent and antisolvent, respectively. The mean diameter of the obtained polymer particles ranged from 0.184 to $0.249\;{\mu}m$. The relationship between particle size and initial drop size was also considered.

• Macromolecular Research
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• v.17 no.6
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• pp.403-410
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• 2009

Cytotoxicity is a severe problem of cadmium sulfide nanoparticles(CSNPs) for use in biological systems. In the present study, mercaptoacetic acid-coated CSNPs were conjugated with bovine serum albumin (BSA) to improve biocompatibility. The surface properties of the CSNPs and albumin-conjugated CSNPs (ACSNPs) were characterized by XRD, UV, FTIR, EA, TEM and DLS. Human breast cancer cells (KB cells) were then cultured in the presence of the nanoparticles to evaluate the cytotoxicity of CSNPs and ACSNPs. Finally, the fluorescence intensity of the nanoparticles' aqueous solution was examined using a fluorescence spectrometer. The results showed that the cell compatibility and fluorescence intensity of ACSNPs were higher than those of CSNPs. The strongly luminescent features of the biocompatible ACSNPs are promising for use in biological fields such as cellular labeling, intracellular tracking and molecular imaging.

• Bulletin of the Korean Chemical Society
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• v.32 no.1
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• pp.157-161
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• 2011

For the fabrication of multifunctional biopolymer nanocomposites in the combination of carbon nanotubes (CNTs), recently increasing attention has been paid to an effective homogenization of CNTs within polymer matrices and a fine tuning of the concentration. We developed an efficient method to produce homogeneous CNT-polycaprolactone nanocomposites with various and controllable CNT concentrations using an ionically-modified multi-walled CNT, MWCNT-Cl. The modified MWCNTs could be homogeneously dispersed in tetrahydrofuran (THF). Polycaprolactone (PCL) as a biodegradable and biocompatible polymer was smoothly dissolved in the homogeneous MWCNT-Cl/THF solution without agglomeration of MWCNT-Cl. The physicochemical and mechanical properties of the resultant nanocomposites were examined and the biological usefulness was briefly assessed.

• Bulletin of the Korean Chemical Society
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• v.33 no.11
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• pp.3681-3685
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• 2012

We developed a simple and effective method for the SERS-based detection of protein-small molecule complexes and label-free proteins using avidin-induced silver aggregation. Upon excitation with light of the appropriate wavelength (633 and 532 nm), the aggregated silver nanoparticles generate a strong electric field that couples with the resonance of the molecules (atto610 and cytochrome c), increasing the characteristic signals of these molecules and resulting in sensitive detection. The detection limit of biotin with the proposed method is as low as 48 ng/mL. The most important aspect of this method is the induction of silver aggregation by a protein (avidin), which makes the silver more biocompatible. This technique is very useful for the detection of protein-small molecule complexes.