Article
Engineering, Chemical
Sonali Gore, Kaustubh Rane
Summary: Calcium ions in hard water reduce the efficiency of detergents by causing the precipitation of anionic surfactants. The use of polystyrene sulfonate, a common component of cation-exchange resins, can help mitigate this issue by binding to hard ions such as Ca+2 and Mg+2. In this study, we investigate the calcium-binding ability of polystyrene sulfonate in the presence of dodecyl sulfate and explore the formation of calcium ion bridges between the two. Our findings demonstrate that the degree of sulfonation significantly influences the formation of calcium ion bridges, with more bridges observed at intermediate degrees of sulfonation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Polymer Science
Magdalena B. Labowska, Maria Skrodzka, Hanna Sicinska, Izabela Michalak, Jerzy Detyna
Summary: This manuscript presents a kinetic analysis of water evaporation from sodium alginate-based hydrogels under different environmental conditions. The results suggest that lower temperatures and higher humidity contribute to better water retention in the hydrogel structure.
Article
Polymer Science
Maud Formanek, Lorenzo Rovigatti, Emanuela Zaccarelli, Francesco Sciortino, Angel J. Moreno
Summary: Through Langevin dynamics simulations, it has been found that the competition between intra- and intermolecular bonds at finite concentration depends on a delicate balance of various entropic contributions, leading to a density-dependent effective valence. System-spanning networks are formed at relatively low monomer densities, with the size of the polymers also influenced by the formation of intermolecular bonds at long bond lifetimes.
Article
Chemistry, Analytical
Juan D. Chavez, Andrew Keller, Helisa H. Wippel, Jared P. Mohr, James E. Bruce
Summary: Chemical cross-linking with mass spectrometry, particularly using isotope-labeled cross-linkers, allows for quantitative analysis of protein structures and interaction dynamics. The development of isobaric quantitative protein interaction reporter (iqPIR) cross-linkers utilizing C-13 and N-15 isotopes enables accurate relative quantitation. This approach is adaptable and facilitates large-scale in vivo quantitative XL-MS investigation of protein interactomes.
ANALYTICAL CHEMISTRY
(2021)
Article
Polymer Science
Jacob S. A. Ishibashi, Ian C. Pierce, Alice B. Chang, Aristotelis Zografos, Bassil M. El-Zaatari, Yan Fang, Steven J. Weigand, Frank S. Bates, Julia A. Kalow
Summary: The composition of low-T-g n-butylacrylate-block-(acetoxyaceto)-ethyl acrylate block polymers is investigated as a strategy to tune the properties of dynamically cross-linked vinylogous urethane vitrimers. Increasing the proportion of the cross-linkable block results in changes in thermorheological properties, structure, and stress relaxation that cannot be solely explained by increasing cross-link density. The thermomechanical and viscoelastic properties of block-copolymer-derived vitrimers are determined by the subtle interplay of microphase separation and network defects.
Article
Polymer Science
Dejie Kong, Sourya Banik, Michael J. San Francisco, Megan Lee, Rae M. Robertson Anderson, Charles M. Schroeder, Gregory B. McKenna
Summary: Bulk rheology measurements on concentrated monodisperse ring-linear DNA mixtures are reported for the first time. The behavior of these mixtures is compared with that of pure linear DNA, highlighting the dominant role of linear chains in the dynamics and entanglement scaling of the blends.
Article
Polymer Science
Mengfan Liang, Yan Zhu, Run Xu, Junqiang Wang, Jian Cui, Dequan Yang, Heng-Yong Nie, Woon-Ming Lau
Summary: This paper systematically studied the application of hyperthermal hydrogen-induced cross-linking (HHIC) technology on poly acrylic acid (PAA) and found that PAA can undergo self-cross-linking without polymer substrates. Furthermore, it was discovered that PAA on different substrates can also be cross-linked by secondary electrons generated by X-ray radiation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Chemistry, Analytical
Benjamin J. Burris, Leah C. Walsh, Abraham K. Badu-Tawiah
Summary: This study describes a contained-electrospray experiment that has the potential to integrate peptide/protein cross-linking with general mass spectrometry workflow. By optimizing the online cross-linking process, various cross-linked products can be detected and it is found that the terminal fully cross-linked product consists of two distinct conformations. This research provides a foundation for future development of high-throughput structural mass spectrometry methods.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Benjamin J. Burris, Leah C. Walsh, Abraham K. Badu-Tawiah
Summary: In this study, the authors developed a contained-electrospray experiment that allows for the integration of peptide/protein cross-linking with mass spectrometry analysis. They optimized the online cross-linking process and identified the different reaction events involved in the crosslinking process. They also observed two distinct conformations of the fully cross-linked product. These findings lay the foundation for future development of a high-throughput structural mass spectrometry method.
ANALYTICAL CHEMISTRY
(2023)
Article
Polymer Science
Sima Israel, Michal Levin, Sapir Oliel, Dahiana Mayer, Idan Lerner, Michael S. Silverstein
Summary: Hierarchically porous polymers were generated by combining emulsion-templated macroporous polymers with simultaneous Friedel-Crafts hyper-cross-linking and porogen removal. Different structures of polymer networks were synthesized to control the micro/meso-porosity and thermal stability of the materials.
Article
Chemistry, Analytical
Fenglong Jiao, Clinton Yu, Andrew Wheat, Xiaorong Wang, Scott D. Rychnovsky, Lan Huang
Summary: Cross-linking mass spectrometry (XL-MS) is an emerging technology for studying protein-protein interactions and protein complex architectures. However, the current XL-MS technologies have limitations in revealing the scope and depth of cellular networks. Peptide enrichment prior to MS analysis is necessary to enhance cross-link identification for proteome-wide studies.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Yang Liu, Kenneth Tran, Kevin Ho, Jessica Emsermann, Margaret Zhang, Pietro Paolo de Oliveira Silva, Gilbert Walker, Frederic Lucas, Mohsen Soleimani, Mitchell A. Winnik
Summary: This study focuses on synthesizing surfactant-free latex dispersions of nanoparticles based on emulsification of a preformed BASF polymer with partially neutralized -COOH groups. The research explored the effects of cross-link density on surface roughness and resistance to deformation, as well as the limitations of molecular mixing due to gel content. Additionally, reactions with epoxides were found to affect polymer diffusion rates in films, highlighting the importance of Tg in polymer behavior.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Multidisciplinary
Beirong Zhang, Zhou Gong, Lili Zhao, Yuxin An, Hang Gao, Jing Chen, Zhen Liang, Maili Liu, Yukui Zhang, Qun Zhao, Lihua Zhang
Summary: Protein dynamics are crucial for their diverse functions, and are significantly influenced by the intracellular environment. This study introduces a hierarchical decoding strategy that uses chemical cross-linking mass spectrometry to investigate protein dynamics in cells. Computational analysis based on distance restraints derived from cross-links is used to infer protein dynamics in vivo.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Maria Stratigaki, Christoph Baumann, Robert Goestl
Summary: Brittle fracture is a common issue in glassy polymers, but can be mitigated with the use of fillers. Researchers have now used optical force probes to visualize the mechanical behavior of second-phase inclusions in polymer composites, providing new insights into fracture events.
Article
Polymer Science
Evgenia Grushevenko, Tatiana Rokhmanka, Stepan Sokolov, Andrey Basko, Ilya Borisov, Konstantin Pochivalov, Alexey Volkov
Summary: This study investigates the impact of cross-linking agents on the structure and transport properties of polydecylmethylsiloxane (C10) material. The findings reveal that the type and length of cross-linking agents play a significant role in altering the structure and influencing the solubility, diffusivity, permeability, and selectivity of gases.