Porous inorganic-organic shape memory polymers

POLYMER

卷:53

Article

Zhang, Dawei²  Burkes, William L.¹  Schoener, Cody A.³  Grunlan, Melissa A.^1,2 

[1] Texas A&M Univ, Dept Biomed Engn, College Stn, TX 77843 USA

[2] Texas A&M Univ, Mat Sci & Engn Program, College Stn, TX 77843 USA

[3] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA

关键词: Polymeric materials;    Porous materials;    Shape memory materials;   

DOI  :  10.1016/j.polymer.2012.04.053

来源: Elsevier

【 摘 要 】

Thermoresponsive shape memory polymers (SMPs) are a type of stimuli-sensitive materials that switch from a temporary shape back to their permanent shape upon exposure to heat. While the majority of SMPs have been fabricated in the solid form, porous SMP foams exhibit distinct properties and are better suited for certain applications, including some in the biomedical field. Like solid SMPs, SMP foams have been restricted to a limited group of organic polymer systems. In this study, we prepared inorganic organic SMP foams based on the photochemical cure of a macromer comprised of inorganic polydimethylsiloxane (PDMS) segments and organic poly(E-caprolactone) (PCL) segments, diacrylated PCL40-block-PDMS37-block-PCL40. To achieve tunable pore size with high interconnectivity, the SMP foams were prepared via a refined solvent-casting/particulate-leaching (SCPL) method. By varying design parameters such as degree of salt fusion, macromer concentration in the solvent and salt particle size, the SMP foams with excellent shape memory behavior and tunable pore size, pore morphology, and modulus were obtained. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free