Chemicals-Inspired Biomaterials: Developing Biomaterials Inspired by Material Science Based on POSS

Tanaka, Kazuo; Chujo, Yoshiki

doi:10.1246/bcsj.20130182

Cited by 65 publications

(19 citation statements)

References 60 publications

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“…Silsesquioxanes are widely used as components for the preparation of such materials [1][2][3][4][5][6][7][8][9][10]. Commonly reactive, functionalized polyhedral oligomeric silsesquioxanes of well-defined, 3D structure, bearing one or more functional groups were applied for this purpose [11][12][13][14][15][16]. The cagelike silsesquioxanes are known as nanoscale, organicinorganic hybrids of approximately 1-3 nm diameter.…”

Section: Introductionmentioning

confidence: 99%

Polyurethane composites based on silsesquioxane derivatives of different structures

Szołyga

Dutkiewicz

Marciniec

2018

J Therm Anal Calorim

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A series of siloxane-silsesquioxane resins with Q 8 structures, as network nodes containing reactive Si-H groups in the siloxane backbone, connecting silsesquioxane moieties, were prepared in a hydrolytic condensation process and successfully functionalized by hydrosilylation of allyl alcohol. The proposed material being an alternative to the well-defined silsesquioxanes has been characterized and used for preparation of a series of polyurethane (PU)-based composites by simple reaction of 3-hydroxypropyl groups of siloxane-silsesquioxane resin with 1,6-diisocyanatohexane and subsequently with 1,6-hexanediol to get polyurethane composite. A series of composites based on PU and octakis(3-hydroxypropyldimethylsiloxy)octasilsesquioxane were prepared in the same manner to investigate the influence of the filler amount (1, 3 or 5%) and its structure on thermal properties of the obtained materials.

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Section: Introductionmentioning

confidence: 99%

Polyurethane composites based on silsesquioxane derivatives of different structures

Szołyga

Dutkiewicz

Marciniec

2018

J Therm Anal Calorim

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“…A wide variety of polyhedral oligomeric silsesquioxane (POSS)-based functional materials have been developed using ionic species. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] We recently reported the synthesis of POSS-based ILs, and we investigated their thermal properties. 25,26 By tethering multiple ion pairs composed of imidazolium cations and carboxylates to the vertices of POSS cores or by simply adding POSS molecules with acid groups, the melting temperatures of the ion pairs decreased and their thermal stabilities increased.…”

Section: Introductionmentioning

confidence: 99%

POSS ionic liquid crystals

et al. 2015

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Here we report the use of unique organic − inorganic hybrid materials composed of octa-substituted polyhedral oligomeric silsesquioxane (POSS) cores as ionic liquid (IL) crystals. These materials have a wide temperature range in which they exist in liquid crystal (LC) phase because of the stabilizing effect of the POSS core. We synthesized ion pairs composed of alkyl chainsubstituted imidazolium and carboxylates of various lengths that were or were not connected to the POSS core; then the thermal properties of these materials were investigated. It was found that both ion salts and the octadecyl-substituted imidazolium ion pairs with or without connection to POSS could form LCs. Interestingly, the LC phase of the POSS-tethered ion salts was maintained until decomposition. In contrast, the octadecyl-substituted imidazolium ion salts that were not tethered to the POSS core showed a clearance point during heating. The highly symmetric structure of POSS contributes not only to the suppression of the molecular motion of the ion salts, but also results in the formation of regular structures, leading to thermally stable, thermotropic IL crystals. In addition, by using electrostatic interactions originating among ionic moieties, robust chiral structures can be produced. 3,4 Even a small quantity of chiral ionic sources can efficiently induce enantiomeric structures in a bulk sample, and ionic moieties can be assembled to form regularly ordered structures. 5,6 These well-ordered ionic moieties are expected to work as efficient cation carriers and scaffolds for ordering cations. These materials, which comprise closely assembled ionic species, can exhibit interesting optical and magnetic properties. Thus, new molecular designs for preparing thermally stable LCs composed of ionic species are needed to produce advanced functional materials.The concept of supported IL phases (SILPs) has been recently proposed. Several materials based on SILPs have exhibited important characteristics such as high ion conductivity and compatibility with organic reaction media; these materials have been used as templates for the formation of nanostructures. 1 Silica supports improve the thermal stability of LCs. 7,8 Carmichael et al. 9 have synthesized and explored silicon wafer-assisted SILP materials. They created layers with thicknesses between 10 and 21 nm of an ionic LC with [C 18 C 1 Im] [PF 6 ] on the planar wafer surface and found that the ionic LC formed a mesophase. Inspired by their work, Wasserscheid et al. 7 fabricated SILP materials using silicon nanoparticles and used them as supports for preparing mesoporous structures that could act as effective gasphase catalysts. 8 To construct advanced materials based on the concept of SILP materials, their properties must be fine-tuned according to preprogramed designs at the molecular level. A wide variety of

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“…[13][14][15][16][17][18][19][20][21] If the POSS derivative can be mixed into polymer matrices, a similar situation to that in a hybrid material, where the inorganic components are dispersed at the nanometer or molecular scale, would be obtained in conventional polymer hybrids ( Figure 2). Therefore, it can be said that POSS is the element-block for easily fabricating a hybrid without sol-gel methods.…”

Section: Poss Element-blocks For Realizing Designable Hybridsmentioning

confidence: 99%

Recent progress in the development of advanced element-block materials

Gon

Tanaka

Chujo

2017

Polym J

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140

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An element-block is defined as a minimum functional unit composed of heteroatoms. The concept of 'element-block material' for designing advanced materials was proposed in 2015. In this review, the recent progress in material designs based on this concept is described. From our research, several element-blocks as representative examples are selected, and their roles in each material are explained. Initially, research on the development of 'designable hybrids' by employing polyhedral oligomeric silsesquioxane (POSS) is illustrated. Multiple functions of hybrids composed of modified POSS and the significant roles of POSS in bio-related polymeric materials for solving critical problems in conventional 19 F MR probes and for realizing new sensing technologies are demonstrated. Next, solid-state luminescent materials containing o-carborane and group 13 element-blocks are discussed. The materials' highly efficient emission in the solid state and their origins are explained. Furthermore, stimuliresponsive luminescent chromism is summarized. The sensing mechanisms and the application of these materials as sensors are presented in this study. In the last part, we mention optically active element-blocks containing chiral P-stereogenic phosphorus. In this review, the characteristics originating from each element-block are explained.

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Chemicals-Inspired Biomaterials: Developing Biomaterials Inspired by Material Science Based on POSS

Cited by 65 publications

References 60 publications

Polyurethane composites based on silsesquioxane derivatives of different structures

Polyurethane composites based on silsesquioxane derivatives of different structures

POSS ionic liquid crystals

Recent progress in the development of advanced element-block materials

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