• 제목/요약/키워드: Polymer brushes

검색결과 7건 처리시간 0.018초

Semiflexible Polymer Brushes: Most Probable Configuration Approach Based on Cotinuous Chain Model

  • 김광규;차국헌
    • Bulletin of the Korean Chemical Society
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    • 제20권9호
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    • pp.1026-1030
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    • 1999
  • The properties of semiflexible polymer brushes are studied by applying the classical limit of mean-field approach for chains with marginal chain stiffness. Using the mean-spherical Gaussian model, the most probable configuration for semiflexible chains is obtained, which reduces to the parabolic brush of Milner et al. [Mac-romolecules 1988, 21, 2610] in the flexible limit. From this configuration, equilibrium brush height as well as interactions between semiflexible brushes are estimated.

Polymer brush: a promising grafting approach to scaffolds for tissue engineering

  • Kim, Woonjung;Jung, Jongjin
    • BMB Reports
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    • 제49권12호
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    • pp.655-661
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    • 2016
  • Polymer brush is a soft material unit tethered covalently on the surface of scaffolds. It can induce functional and structural modification of a substrate's properties. Such surface coating approach has attracted special attentions in the fields of stem cell biology, tissue engineering, and regenerative medicine due to facile fabrication, usability of various polymers, extracellular matrix (ECM)-like structural features, and in vivo stability. Here, we summarized polymer brush-based grafting approaches comparing self-assembled monolayer (SAM)-based coating method, in addition to physico-chemical characterization techniques for surfaces such as wettability, stiffness/elasticity, roughness, and chemical composition that can affect cell adhesion, differentiation, and proliferation. We also reviewed recent advancements in cell biological applications of polymer brushes by focusing on stem cell differentiation and 3D supports/implants for tissue formation. Understanding cell behaviors on polymer brushes in the scale of nanometer length can contribute to systematic understandings of cellular responses at the interface of polymers and scaffolds and their simultaneous effects on cell behaviors for promising platform designs.

Properties of Cylindrical Brush Polymers

  • Zhang Bin;Fischerl Karl;Grohn Franziska;Pedersen J S.;Schmidt Manfred
    • 한국고분자학회:학술대회논문집
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    • 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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    • pp.109-109
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    • 2006
  • Flexible polymers with densely grafted side chains adopt the shape of cylindrical brushes, because the steric repulsion of the side chains overcomes the entropic restoring force of the main chain. Combined light-and neutron scattering measurements elucidate the extend of main chain and side chain stretching as function of side chain length. The application of cylindrical brushes as molecular actuators in response to external stimuli which is discussed.

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박테리아 부착억제 고분자 기반 고체 표면의 항균 코팅 연구 동향 (Recent Progress of Antibacterial Coatings on Solid Substrates Through Antifouling Polymers)

  • 고상원;이재영;박덕신
    • 공업화학
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    • 제32권4호
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    • pp.371-378
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    • 2021
  • 고체 표면의 박테리아 부착억제를 목적으로 고분자를 이용한 친수성 표면 개질 연구가 주목을 받고 있다. 부착억제기능은 세포독성이 아닌 작용으로 바이오필름 형성의 초기단계 방지를 목적으로 하며 친수성 또는 이온성 고분자가 도입된 고체 표면은 단백질, 박테리아 등 생물 개체의 부착방지에 효과적이다. 이는 표면에서의 친수층 형성으로 인한 표면 장벽 형성, 고분자 사슬에 의한 반발력과 삼투압성 응력 작용, 그리고 이온성 고분자와 세포 표면의 정전기적 상호작용에 기인한다. 부착억제를 위한 고분자의 표면 도입은 주로 표면 기능기와의 결합을 이용한 접합 방식과 자연모방 접착 기능기를 활용한 침적 방식으로 이루어지고 있다. 본 총설에서는 표면 도입 시 부착억제 기능을 보이는 대표적인 고분자의 종류, 코팅방법, 및 항균 특성을 소개하고 향후 공공시설, 산업 등으로의 대면적 응용을 위한 고려사항들을 다루고자 한다.