Article
Polymer Science
Ulrike Staudinger, Andreas Janke, Christine Steinbach, Uta Reuter, Martin Ganss, Oliver Voigt
Summary: This study focuses on the dispersion and localization of carbon nanotubes (CNTs) in block copolymers (BCPs) using ball milling. Shortening the CNTs via ball milling allows for selective tuning of the electrical and mechanical properties of the resulting nanocomposites. The study found that the shortened CNTs were partially localized in the soft PB-rich phase or at the interface of the PB-rich and PS phases. The stress-strain behavior of the composites was similar to the neat BCP and showed significant changes only in Young's modulus and strain at break. The electrical percolation threshold increased as the CNTs were shortened, and composites with longer milling times showed decreased surface resistivity.
Article
Chemistry, Multidisciplinary
Irena Levin, Aurel Radulescu, Lucy Liberman, Yachin Cohen
Summary: This research aims to characterize the adsorption morphology of block copolymer dispersants of the styrene-block-4-vinylpyridine family (S4VP) on the surface of multi-walled carbon nanotubes (MWCNT) in a polar organic solvent, N,N-dimethyl formamide (DMF). The results show that the block copolymers adsorb onto the MWCNT surface as a continuous coverage of low polymer concentration. Increasing the PS molecular weight increases the thickness of the adsorbed layer but decreases the overall polymer concentration within it. These results are relevant for the ability of dispersed CNTs to form a strong interface with matrix polymers in composites, due to the extension of the 4VP chains allowing for entanglement with matrix chains.
Article
Polymer Science
Pengyu Chen, Frank S. Bates, Kevin D. Dorfman
Summary: In this study, the feasibility of adding ABC triblock copolymers into a polymer system was investigated using self-consistent field theory. The results showed that the addition of a small amount of ISO could stabilize the GA morphology, but the phase window was relatively narrow. Designing the system to have comparable domain sizes enhanced the stability of GA against competing lamellae.
Article
Polymer Science
Sahori Imai, Masato Arakawa, Yohei Nakanishi, Mikihito Takenaka, Hiroyuki Aoki, Makoto Ouchi, Takaya Terashima
Summary: Microphase separation behavior of copolymers bearing quaternary ammonium cations and hydrophobic groups was studied. Sub-5 nm lamellar structures comprising cationic layers and hydrophobic layers were formed by annealing under humid conditions. The domain spacing could be controlled by tuning the length and composition of the hydrophobic groups. Transparent or translucent polymer materials containing small lamellar structures were obtained.
Article
Polymer Science
Debasrita Bharatiya, Biswajit Parhi, Sarat K. Swain
Summary: This work aims to develop amphiphilic self-assembled block copolymers of poly N-isopropyl acrylamide (PNIPAM) with polyethylene oxide (PEO), and poly amino acids (PAAs) with and without polycaprolactone (PCL) via ring-opening and condensation polymerization methods. The designed materials exhibit improved mechanical strength, effective antibacterial activities, and sustainable drug release rate, making them potential materials for various biomedical applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Ryota Sujita, Sahori Imai, Makoto Ouchi, Hiroyuki Aoki, Takaya Terashima
Summary: By utilizing microphase separation, we have successfully achieved the creation of sub-4 nm lamellar structures in cationic polymers. These materials exhibit controllable domain spacing and can maintain stable lamellar structures at high temperatures.
Article
Polymer Science
Shankar P. Khatiwada, Ulrike Staudinger, Dieter Jehnichen, Gert Heinrich, Rameshwar Adhikari
Summary: This study investigated the chemical modification of a star shaped block copolymer based on PS and PB through epoxidation, resulting in changes in morphology and mechanical properties of the BCPs at different epoxidation levels.
Article
Construction & Building Technology
Peiqi Li, Junxing Liu, Sumin Im, Seongmin Cho, Sungchul Bae
Summary: This paper investigates the influence of graphene nanoribbons (GNRs) on the mechanical, hydration, and electrical properties of cement-based materials. The results show that the incorporation of GNRs improves the electrical resistivity and mechanical performance of the cementitious composites.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Debmalya Roy, B. Vaishnav, Sarathlal Koyiloth Vayalil, Ajay Gupta, N. Eswara Prasad, Benedikt Sochor, Matthias Schwartzkopf, Stephan V. Roth, Tobias Kraus
Summary: This study investigates a major limitation of flexible sensors, namely the loss of conductivity upon multiple stretching and bending cycles. The researchers introduce conducting fillers with two different geometries, carbon black and carbon nanotubes, into polydimethylsiloxane (PDMS) to understand the effect of periodic tensile stress on the structure formation of nanofillers. The results show that loading the nanofillers beyond the percolation threshold ensures cyclic stability of the resulting network channels. In addition, they vary the surface chemistry of the carbon nanotubes to investigate interfacial interactions at the molecular level.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
L. Lavagna, R. Nistico, S. Musso, M. Pavese
Summary: Three decades of scientific scrutiny on carbon nanotubes (CNTs) have shown that challenges in handling and dispersing CNTs, as well as their limited interaction with other materials due to their structure, can impact technological applications. A thorough understanding of CNT properties and selecting appropriate dispersion procedures are essential for achieving desired nanocomposite properties. Advanced knowledge on CNT synthesis, functionalization methods, and dispersion techniques is crucial for addressing these challenges.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Jie Hu, Yingxuan Mei, Huifen Wu, Yan Zhao, Dongping Wu, Nan Ye, Peng Yi, Yu Yang, Minmeng Liao
Summary: U-60 and polymers are selectively enriched on the polymer surface through hydrogen bonding. The morphology and non-covalent interaction of core-shell nanocomplexes were investigated using electron microscopy and vibration spectroscopy. Different structures of core-shell nanocomposites were formed by block copolymers and U-60 under the synergistic effect of hydrogen bonding and nanometer phase separation. Removal of U-60 from the solution was achieved by using block copolymers as adsorbents, with approximately 96% removal efficiency after one month. This study provides a potential pathway for the development of novel and efficient polymer self-assembly materials for the adsorption and removal of nuclear pollution in the environment.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Sen Yang, Wen Jia, Yuangui Wang, Weifu Zhang, Xiaoya Yuan
Summary: This study introduced hydroxyl groups onto graphene nanosheets to prepare water-soluble hydroxylated graphene (HO-G), which exhibited good dispersion and reinforcement effects in cement composites. Compared to graphene oxide (GO), HO-G showed superior compressive and flexural strength enhancements, as well as reduced chloride ion permeability in cement mortar applications.
Article
Polymer Science
R. Simonutti, D. Bertani, R. Marotta, S. Ferrario, D. Manzone, M. Mauri, M. Gregori, A. Orlando, M. Masserini
Summary: This study investigates the effect of using different common solvents on the self-assembly behavior of block copolymer nanoparticles, finding that the hydrogen bonding ability of the solvent strongly influences the size and shape of the particles, as well as their cytotoxicity.
Article
Engineering, Electrical & Electronic
Beixue Yang, Jun Zhang, Jianning Bao
Summary: By controlling the loading amount of fillers, the advantages of electrically conductive polymer composites (CPCs) can be maintained while ensuring their electrical conductivity. In this study, the effect of polymeric matrix ratio and blending sequence on conductivity and mechanics was investigated, and a conductive biphasic composite polypropylene (PP)/styrene-butadiene-styrene tri-block copolymer (SBS)/carbon black (CB) was prepared with only 2% filler loading. The blending sequence of premixing PP and CB showed superior conductivity improvement, with higher PP content contributing to better phase continuity and conductive network construction.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Tomomichi Itoh, Minami Okuno, Yoshihiro Moriya, Hiroaki Shimomoto, Eiji Ihara
Summary: This study focused on using poly(acrylic acid) block copolymers as stabilizers to modify the surfaces of polymer particles during dispersion polymerization. Polystyrene-block-poly(acrylic acid) was found to have better control over particle size range and surface density compared to poly(acrylic acid) homopolymer. The impact of heterogeneity between the polymer species of the particle core and attached polystyrene or PMMA chains in the poly(acrylic acid) block copolymers was also investigated.
Article
Engineering, Electrical & Electronic
U. Staudinger, G. Zyla, B. Krause, A. Janke, D. Fischer, C. Esen, B. Voit, A. Ostendorf
MICROELECTRONIC ENGINEERING
(2017)
Article
Polymer Science
Ulrike Staudinger, Ralf Schlegel, Roland Weidisch, Juliane Fritzsche, Manfred Klueppel, Gert Heinrich, Jimmy W. Mays, David Uhrig, Nikos Hadjichristidis
EUROPEAN POLYMER JOURNAL
(2008)
Article
Polymer Science
Ulrike Staudinger, Bhabani K. Satapathy, Roland Weidisch
EUROPEAN POLYMER JOURNAL
(2008)
Article
Polymer Science
R. Schlegel, U. Staudinger, M. Thunga, R. Weidisch, G. Heinrich, D. Uhrig, Jimmy W. Mays, H. Iatrou, N. Hadjichristidis
EUROPEAN POLYMER JOURNAL
(2009)
Article
Polymer Science
Martin Ganss, Bhabani K. Satapathy, Mahendra Thunga, Ulrike Staudinger, Roland Weidisch, Dieter Jehnichen, Juergen Hempel, Markus Rettenmayr, Alejandra Garcia-Marcos, Hans H. Goertz
EUROPEAN POLYMER JOURNAL
(2009)
Article
Polymer Science
M. Thunga, B. K. Satapathy, U. Staudinger, R. Weidisch, M. Abdel-Goad, A. Janke, K. Knoll
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2008)
Article
Polymer Science
Mahendra Thunga, Ulrike Staudinger, Martin Ganss, Roland Weidisch, Konrad Knoll
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2009)
Article
Polymer Science
Martin Ganss, Ulrike Staudinger, Mahendra Thunga, Konrad Knoll, Konrad Schneider, Manfred Stamm, Roland Weidisch
Article
Polymer Science
Ulrike Staudinger, Beate Krause, Christine Steinbach, Petra Poetschke, Brigitte Voit
Article
Polymer Science
Martin Ganss, Ulrike Staudinger, Bhabani K. Satapathy, Andreas Leuteritz, Roland Weidisch
Summary: This study investigated the influence of oligostyrene-modified montmorillonite (OS-MMT) on a nanostructured styrene-butadiene based block copolymer, revealing that the addition of OS-MMT can enhance the strength and toughness of the composite material without compromising its ductility within a certain range of content. Furthermore, the different content of OS-MMT affects the fracture mechanism of the composite material, transitioning from homogeneous plastic flow to crazing deformation.
Article
Polymer Science
Shankar P. Khatiwada, Ulrike Staudinger, Dieter Jehnichen, Gert Heinrich, Rameshwar Adhikari
Summary: This study investigated the chemical modification of a star shaped block copolymer based on PS and PB through epoxidation, resulting in changes in morphology and mechanical properties of the BCPs at different epoxidation levels.
Article
Materials Science, Composites
Ulrike Staudinger, Lothar Jakisch, Luise Hilbig
JOURNAL OF COMPOSITES SCIENCE
(2020)
Proceedings Paper
Polymer Science
Ulrike Staudinger, Bhabani K. Satapathy
MACROMOLECULAR SYMPOSIA
(2017)
Article
Materials Science, Composites
U. Staudinger, P. Thoma, F. Luettich, A. Janke, O. Kobsch, O. D. Gordan, P. Poetschke, B. Voit, D. R. T. Zahn
COMPOSITES SCIENCE AND TECHNOLOGY
(2017)