Shape-Memory Effects of Polymers

报告题目: Shape-Memory Effects of Polymers

报告人: Prof. Andreas Lendlein

 Institutes of Biomaterial Science and Berlin-Brandenburg Centre for Regenerative Therapies (BCRT)

 Helmholtz-Zentrum Geesthacht

 Teltow, Germany

报告时间:2017622日(星期四)上午10:00-11:00

报告地点:独墅湖校区909号楼3403


报告摘要: In recent years substantial progress has been achieved in the synthesis [1] and characterization[2] of shape-memory polymers (SMPs). SMPs can be programmed by temporary fixation of adeformation, which is recovered once a suitable stimulus is applied. In most cases, thestimulus is heat, but other stimuli, such as electric current, humidity, light or alternatingmagnetic fields have been realized as well. Important achievements are remotely controlledactuation and the realization of more complex movements on demand[3]. Suitable polymericmaterials that are capable of an SME provide a polymer network architecture consisting ofnetpoints, chain segments, and molecular switches[4]. Interconnected macroporous rhodiumphosphinecoordination polymer network will be presented as artificial soft material, in whichshape changes are induced by ultrasonic cavitation based mechanical force. The rhodium(I)-phosphine coordination bonds in the microphase separated pore morphology are acting asmolecular switches (temporary cross-links)[5]. With two thermal transitions the capability oftwo subsequent shape changes can be implemented in a polymeric material [6]. Thermallyinduced,triple-shape hydrogels will be introduced as soft materials enabling complexmovements[7]. Considering the strong trend toward miniaturization in many technical fields,there is a need to evaluate the suitability of SMPs to also serve as enabling technology on themicroscale[8], for example, as fibres[9], particles[10, 11], or cuboids[12].

References

[1] K. K. Julich-Gruner, C. Löwenberg, A. T. Neffe , M. Behl , A. Lendlein, Macromol.

 Chem. Phys. 2013, 214, 527.

[2] M. Heuchel, T. Sauter, K. Kratz, A. Lendlein, J. Polym. Sci., Part B: Polym. Phys. 2013,

 51, 621.

[3] M. Y. Razzaq, M. Behl, A. Lendlein, Nanoscale 2012, 4, 6181.

[4] M. Behl, J. Zotzmann, A. Lendlein, Adv. Polym. Sci. 2010, 226, 1.

[5] P. Zhang, M. Behl, X. Peng, M. Y. Razzaq, A. Lendlein, Macromol. Rapid. Comm, 2016,

 37, 1897.

[6] I. Bellin, S. Kelch, R. Langer, A. Lendlein, Proc. Natl. Acad. Sci. USA, 2006, 103, 18043.

[7] U. Nöchel, M. Behl, M. Balk, A. Lendlein, ACS Appl. Mater. Interfaces 2016, 8, 28068.

[8] C. Wischke, A. Lendlein, Langmuir, 2014, 30, 2820.

[9] Q. Zhang, K. Kratz, A. Lendlein, Polym. Adv. Technol. 2015, 26, 1468.

[10] F. Friess, U. Nöchel, A. Lendlein, C. Wischke, Adv. Healthc. Mater. 2014, 3, 1986.

[11] Q. Zhang, T. Sauter, L. Fang, K. Kratz, A. Lendlein, Macromol. Mater. Eng. 2015, 300,

 522.

[12] Y. Liu, M. Y. Razzaq, L. Fang, K. Kratz, A. Lendlein, Macromolecules 2017, 50, 2518.


报告人简介:Andreas Lendlein is Professor for Materials in Life Sciences at University Potsdam and Professor inChemistry at Freie Universität Berlin as well as member of the medical faculty of Charité UniversityMedicine Berlin. He is Director of the Institute of Biomaterial Science at the Helmholtz-ZentrumGeesthacht in Teltow, Germany, and Board of Directors Member of the Berlin-Brandenburg Center forRegenerative Therapies, Berlin. His research interests in material science are polymer-based biomaterialswith special emphasis given to multifunctional materials, stimuli-sensitive polymers, especiallyshape-memory polymers, and biomimetic polymers. Furthermore, he explores potential applications ofsuch biomaterials in biofunctional implants, controlled drug delivery systems, and regenerative therapies.Andreas Lendlein published > 550 papers and is an inventor on about 300 issued patents and patentapplications. He received more than 20 awards for his scientific work and his achievements as anentrepreneur. He is Associate Editor of PAT and serves on the editorial board of several scientificjournals, including the Executive Advisory Board of VCH-Wiley´s Macromolecular Journals.

代表性论文:

[1] C. Lowenberg, M. Balk, C. Wischke, M. Behl, A. Lendlein, Acc. Chem. Res. 2017, 50, 723.

[2] M. Balk, M. Behl, C. Wischke, J. Zotzmann, A. Lendlein, Adv. Drug Deliv. Rev. 2016, 107, 136.

[3] M. Behl, K. Kratz, J. Zotzmann, U. Nochel, A. Lendlein, Adv. Mater. 2013, 25, 4466.

[4] M. Behl, K. Kratz, U. Noechel, T. Sauter, A. Lendlein, Proc. Natl. Acad. Sci. USA 2013, 110, 12555.

[5] A. Lendlein, H.Y. Jiang, O. Junger, R. Langer, Nature 2005, 434, 879.

[6] A. Lendlein, R. Langer, Science 2002, 296, 1673.


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