Article
Polymer Science
Laura Aliotta, Alessandro Vannozzi, Ilaria Canesi, Patrizia Cinelli, Maria-Beatrice Coltelli, Andrea Lazzeri
Summary: The study investigated PLA/PBSA biobased binary blends with different compositions of PBSA, produced by twin screw-extrusion. It was found that adding an epoxy oligomer (EO) improved the compatibility of the rubber phase with the PLA matrix. Different micromechanical responses were observed for blends with varying compositions, with EO causing a significant change in the response of certain blends.
Review
Polymer Science
Serena Coiai, Maria Laura Di Lorenzo, Patrizia Cinelli, Maria Cristina Righetti, Elisa Passaglia
Summary: Poly(lactic acid) (PLA) is a widely produced biobased, biodegradable and biocompatible polyester. Although it shares similarities with petroleum-based polymers, its high brittleness and low toughness limit its utilization, prompting the blending with other biobased and biodegradable polymers. By incorporating appropriate additives and solid nanoparticles, the toughness and ductility of PLA can be improved, enhancing its mechanical performance, thermal stability and gas/vapor barrier properties.
Article
Polymer Science
Nicolas Candau, Oguzhan Oguz, Noel Leon Albiter, Gero Forster, Maria Lluisa Maspoch
Summary: By using Dicumyl peroxide (DCP) as a crosslinking agent, recycling waste tire rubber (GTR) with poly (lactic acid) (PLA) can improve the toughness and impact strength of the material. Grinding GTR can enhance the performance of the blend, with the finest GTR showing the best improvement in tensile strength, modulus, strain at break, energy at break, and impact strength compared to neat PLA.
Article
Polymer Science
Mengmeng Wang, Xianrong Liang, Heng Wu, Linlin Huang, Gang Jin
Summary: In this study, super toughened PLA-based blends were successfully prepared by melt blending PLA with EVA and compatibilizing with E-MA-GMA. The addition of E-MA-GMA promoted phase adhesion and increased interface thickness, resulting in a super-toughened blend with incomplete fracture behavior during impact tests. The maximum impact strength of 77.6 kJ/m(2) was achieved with 12 wt% E-MA-GMA in the ternary blend, showing a 27.7 times improvement over neat PLA. Rheological and micromorphology analysis demonstrated enhanced viscosity and reduced crystallinity in the ternary blends.
POLYMER DEGRADATION AND STABILITY
(2021)
Article
Biochemistry & Molecular Biology
Ning Chen, Changqing Peng, Yu-Chung Chang, Xiaonan Li, Yan Zhang, Hongzhi Liu, Shuai Zhang, Ping Zhang
Summary: This work presents a facile and efficient strategy for toughening poly(lactic acid) (PLA) by in-situ forming crosslinked bio-polyurethane (PCPUE) phase. By adjusting the ratio of complementary functional groups between the toughening monomers, the notched impact strength and phase morphologies of PLA blends can be tailored. The optimized interfacial compatibility and crosslinking density were considered responsible for the remarkable improvement in impact toughness.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Polymer Science
Ryota Kamiike, Tomohiro Hirano, Koichi Ute
Summary: A chemometric approach was used to quantitatively analyze the structure of binary blends of copolymers. The blending parameters of the copolymers, such as chemical compositions and mole fractions, were successfully predicted using the H-1 NMR spectral matrix and blending parameter matrix. LASSO regression showed higher accuracy in the quantitative prediction compared to PLS regression.
Article
Polymer Science
Laura Aliotta, Alessandro Vannozzi, Patrizia Cinelli, Maria-Beatrice Coltelli, Andrea Lazzeri
Summary: This study investigated the biocomposites based on plasticized poly(lactic acid) (PLA)-poly(butylene succinate-co-adipate) (PBSA) matrix containing wheat bran fiber, a low value by-product of the food industry. The effect of bran addition on mechanical properties was examined, focusing on the fiber-matrix adhesion. Various analytical models based on static and dynamic tests were used to estimate the interfacial shear strength of the biocomposites. The essential work of fracture approach was also employed to evaluate the effect of bran addition on composite fracture toughness.
Article
Polymer Science
Leonardo G. Engler, Naiara C. Farias, Janaina S. Crespo, Noel M. Gately, Ian Major, Romina Pezzoli, Declan M. Devine
Summary: This study aimed to modify the mechanical and degradation properties of biodegradable polymers by blending different polymers. It was found that poly(lactic acid) (PLA) exhibited the highest tensile strength (67 MPa), while the addition of poly(hydroxybutyrate) (PHB) and polycaprolactone (PCL) increased the flexibility of the samples. Moreover, the degradation of the blends in seawater occurred through bulk and surface erosion mechanisms.
Article
Polymer Science
Vito Gigante, Luca Bosi, Paola Parlanti, Mauro Gemmi, Laura Aliotta, Andrea Lazzeri
Summary: The study investigated the toughening mechanisms of poly(lactic acid; PLA) blended with two different elastomers, PBAT and POE-g-GMA, showing an improvement in PLA performance. PBAT appeared as spheres while POE-g-GMA had a dual sphere/fibre morphology. Damage was mainly generated by shear yielding deformation in the subcritical crack tip damaged zone.
Article
Chemistry, Applied
Yaowalak Srisuwan, Yodthong Baimark
Summary: This paper reports a study on flexible polymer blends made from PLLA-PEG-PLLA and TPS. The addition of TPS suppressed crystallizability of PLLA and PLLA-PEG-PLLA matrices, while greatly increasing the thermal stability of PLLA-PEG-PLLA. The PEG middle-blocks enhanced phase compatibility between PLLA-PEG-PLLA and TPS, resulting in ductile and flexible blend films.
CARBOHYDRATE POLYMERS
(2022)
Article
Materials Science, Characterization & Testing
Laura Aliotta, Vito Gigante, Ruben Geerinck, Maria -Beatrice Coltelli, Andrea Lazzeri
Summary: This study investigates the influence of PCL content on the micromechanical deformation processes and fracture mechanisms of PLA/PCL blends. Dilatometric uniaxial tests and SEM analysis were used to analyze the deformation behavior and morphology of the blends.
Article
Polymer Science
Lixin Song, Qian Zhang, Yongsheng Hao, Yongchao Li, Weihan Chi, Fei Cong, Ying Shi, Li-Zhi Liu
Summary: In this study, PLA-g-GMA graft copolymers were prepared using melt-free radical grafting, and were used as compatibilizers in the preparation of PLA/PPC/PLA-g-GMA blends. It was found that the introduction of comonomers significantly increased the grafting degree of the copolymers, improving the optical and mechanical properties of the blends.
Article
Chemistry, Multidisciplinary
Agata S. Herc, Marta K. Dudek, Slawomir Kazmierski, Joanna Bojda, Witold Kaczorowski, Bartlomiej Januszewicz, Anna Kowalewska
Summary: The morphology and hierarchical organization of crystals formed during the confined solvent evaporation from solutions of polylactide mixed with amorphous linear ladder polysilsesquioxanes were investigated. The type of functional group R and the supramolecular interactions and miscibility of the components played important roles in the complex crystallization process. The evaporative crystallization process in polylactide-based blends could be used for fabricating self-organized biocompatible materials of three-dimensional architectures.
Article
Polymer Science
Ramon Tejada-Oliveros, Stefano Fiori, Jaume Gomez-Caturla, Diego Lascano, Nestor Montanes, Luis Quiles-Carrillo, David Garcia-Sanoguera
Summary: In this work, the development and characterization of PLA blends with enhanced toughness by adding lactic acid oligomers (OLA) were reported. The feasibility of reactive extrusion (REX) and injection moulding to obtain high impact resistant injection moulded parts were also assessed. It was found that both reactive extrusion with dicumyl peroxide (DCP) and the addition of maleinized linseed oil (MLO) could improve the impact strength of PLA, providing environmentally friendly strategies for enhancing PLA toughness.
Article
Materials Science, Characterization & Testing
Laura Aliotta, Ilaria Canesi, Andrea Lazzeri
Summary: The preferential distribution of ATBC plasticiser in PLA-PBAT blends was studied, showing a preference for distribution in the PLA phase over the PBAT phase. Dynamic mechanical thermal analysis and analysis of Hansen Solubility Parameters supported these findings.
Article
Polymer Science
Jens Balko, Andreas Rinscheid, Andreas Wurm, Christoph Schick, Ruth H. Lohwasser, Mukundan Thelakkat, Thomas Thurn-Albrecht
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2016)
Article
Polymer Science
Borja Fernandez-d'Arlas, Jens Balko, R. Peter Baumann, Elmar Poeselt, Raphael Dabbous, Berend Eling, Thomas Thurn-Albrecht, Alejandro J. Mueller
Review
Materials Science, Multidisciplinary
Jens Balko, Guiseppe Portale, Ruth H. Lohwasser, Mukundan Thelakkat, Thomas Thurn-Albrecht
JOURNAL OF MATERIALS RESEARCH
(2017)
Article
Materials Science, Multidisciplinary
Steffen Vowinkel, Frank Malz, Karsten Rode, Markus Gallei
JOURNAL OF MATERIALS SCIENCE
(2017)
Article
Polymer Science
J. Fage, K. Knoll, N. Niessner, O. Carstensen, T. Schulz, F. Malz, M. Doering, F. Schoenberger
Article
Polymer Science
Jon Maiz, Borja Fernandez-d'Arlas, Xinye Li, Jens Balko, Elmar Poeselt, Raphael Dabbous, Thomas Thurn-Albrecht, Alejandro J. Muller
Article
Polymer Science
Stefan Boehler, Melanie Bartel, Andreas Bohn, Ron Jacob, Johannes Ganster, Thomas Buesse, Jens Balko
Article
Polymer Science
Jannik Hallstein, Andre Gomoll, Antje Lieske, Thomas Buesse, Jens Balko, Robert Bruell, Frank Malz, Elke Metzsch-Zilligen, Rudolf Pfaendner, Daniel Zehm
Summary: Commercially available partially bio-based PBS and PBSA exhibit branching behavior during thermal processing, with PBS showing a higher tendency than PBSA. The presence of fumaric acid moieties contributes to this branching, which can be suppressed by the addition of stabilizers such as phenolic antioxidants.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Pranav Majgaonkar, Ronny Hanich, Frank Malz, Robert Bruell
Summary: This study focuses on an eco-friendly recycling concept of bio-based plastic, poly(lactic) acid (PLA), through solvent assisted transesterification to produce valuable lactate ester. The research indicates that high yield of ethyl lactate can be obtained by using appropriate system and molar ratio of nucleophile per mole repeat unit of PLA.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemical Research Methods
Subrajeet Deshmukh, Tibor Macko, Jan-Hendrik Arndt, Frank Malz, Gerard van Doremaele, Raffaele Bernardo, Robert Bruell
Summary: The elution behavior of EN copolymers is correlated with their norbornene content, showing a positive correlation for norbornene content below 20 mol % and a negative correlation for content above 20 mol %. Differences in microstructure may lead to opposing trends in elution behavior.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Chemistry, Analytical
Subrajeet Deshmukh, Tibor Macko, Jan-Hendrik Arndt, Frank Malz, Raffaele Bernardo, Sander Niessen, Gerard van Doremaele, Robert Brull
Summary: Liquid chromatography at critical conditions can uncover molecular information on macromolecular structures that cannot be obtained by other analytical techniques. This study identified critical conditions for statistical ethylene propylene copolymers by varying the composition of the binary mobile phase at a constant temperature and modulating the adsorption-desorption temperature at a constant mobile phase composition. A novel chromatographic approach using structure retention relationships and Hansen Solubility Parameters was employed to identify solvents. The study provided experimental evidence for the existence of critical conditions for polyolefin random copolymers, and the molecular information obtained can be utilized for engineering complex polymers for future applications.
ANALYTICA CHIMICA ACTA
(2023)
Article
Polymer Science
Qiang Yu, Afiq Anuar, Albrecht Petzold, Jens Balko, Kay Saalwaechter, Thomas Thurn-Albrecht
Summary: A detailed analysis of polybutylene succinate (PBS), a biodegradable polyester, was conducted using nuclear magnetic resonance (NMR) and small-angle X-ray scattering. It was found that PBS has a high crystallinity and a typical morphology of lamellar crystals with a broad thickness distribution of the amorphous interlayers. The mechanical properties of PBS were also found to be enhanced by additional insertion crystallization during cooling.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2023)
Correction
Biochemical Research Methods
Yong Wang, Suhua Yu, Rui Li, Jing Wan, Yuheng Wang, Zongli Huo, Chunyong Wu, Li Mi, Songqin Liu
JOURNAL OF CHROMATOGRAPHY A
(2024)
Review
Biochemical Research Methods
Israel D. Souza, Maria Eugenia C. Queiroz
Summary: Organic-silica hybrid monolithic materials have gained significant attention in separation science and sample preparation due to their unique properties. This review summarizes the characteristics, current status, and recent developments of these materials, as well as discusses synthesis methods, characterization techniques, and strategies for improving extraction efficiency in various applications.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Bhagwat Upreti, Bhanu Prasad Vempatapu, Jagdish Kumar, Pankaj K. Kanaujia
Summary: Lubricating oils are essential for the effective performance of internal combustion engines. This study presents a new HPLC method for determining additives in finished lubricating oils and polar substances in used engine oils.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zongqing Huang, Haoju Hua, Xiuzhen Du, Zipeng Zhen, Wei Zhao, Jun Feng, Ji-an Li
Summary: This study successfully isolated VHHs against the SUMO protein for the first time using biopanning of an immune camelid nanobody library. The VHHs were coupled to agarose resins to form affinity chromatography resins, allowing for one-step purification of various SUMO fusions.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Xueting Qiu, Xuben Hou, Yue Yang, Hao Fang, Fei Cui, Xinying Yang
Summary: In this study, a new method based on electrophoretically mediated microanalysis was developed for the investigation of PTPRO enzymatic activity. The method was successfully used to determine the kinetics of PTPRO and the inhibitory concentration of PTPRO inhibitors. The method exhibited improved accuracy and reduced consumption compared to traditional methods.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Feifei Luo, Mengmeng Hao, Lei Zhang, Yangguo Xie, Wei Hou, Hongya Wang, Zhongli Zhang
Summary: In this study, a comprehensive screening and structure elucidation of 23 nonvolatile organic compounds (NVOCs) in two antibody drugs was conducted. Seven previously unreported compounds were identified. A quantitative method with high sensitivity, accuracy, and precision was developed for evaluating the safety of NVOCs in drug products.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zuzana Vosahlova, Kveta Kalfkova, Martin Gilar, Jakub Szymarek, Maria Mazurkiewicz-Beldzinska, Sylwia Studzi
Summary: A hydrophilic interaction liquid chromatography method was developed for the separation and identification of oligonucleotide impurities and metabolites, and successfully applied to the analysis of serum samples from Spinraza-treated patients.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Aswanidevi Kongasseri, Thirumalai Madhesan, Sangeetha Krishna Kumar, Sushmitha Pedugu Sivaraman, Suchashrita Mitra, Pitchaiah Kancharlapalli Chinaraga, C. V. S. Brahmmananda Rao, Sivaraman Nagarajan, Prabhakaran Deivasigamani, Akhila Maheswari Mohan
Summary: This study focuses on the sequential separation of trivalent lanthanides using modified C-18 silica-packed supports and reversed-phase HPLC technique. By tuning the column modifiers and separation parameters, the researchers achieved systematic separation of Ln(3+). The results showed that the choice of column modifiers and fine-tuning of the modification procedure were crucial for achieving excellent separation.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Raquel Perez-Robles, Szabolcs Fekete, Robert Kormany, Natalia Navas, Davy Guillarme
Summary: There is a mismatch between the sample diluent and the mobile phase in HILIC analysis, leading to analyte breakthrough and peak distortion. Adding a weak solvent for pre-injection can effectively prevent these issues and improve sensitivity.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Oleg Pokrovskiy, Irina Rostovschikova, Konstantin Ustinovich, Ilya Voronov, Dmitry Kosyakov
Summary: A chromatography-like propagation of water through the material bed was observed during supercritical fluid extraction of aroma plants with high moisture content, which could be significant for modeling the kinetics of supercritical fluid extraction of non-volatile compounds.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Yasar Kemal Recepoglu, Ozguer Arar, Asli Yuksel
Summary: Biosorption using phosphorylated hazelnut shell waste (FHS) is a promising method for lithium removal and recovery. This study investigated the performance of a continuous-flow packed-bed column system using FHS for ultra-low level lithium removal. The results showed that the lihium biosorption capacity of the FHS column was unaffected by the bed height, but decreased with increasing flow rate.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Jian Sun, Zheheng Zheng, Zixiao Jia, Jiabin Wang, Xucong Lin
Summary: In this study, an ionic covalent organic framework (iCOF) surface grafting monolithic sorbent was prepared for in-tube solid-phase microextraction (SPME) of aristolochic acids (AAs) in various samples. The density of quaternary ammonium ions in the iCOF was modulated for enhanced adsorption of AAs. The iCOF surface grafting monolithic sorbent was confirmed by different means. Several operating conditions were optimized to develop the online in-tube SPME-HPLC method, which showed good linearity, low limits of detection, and high recoveries for AAs in serum samples. This study presents a feasible approach for the application of COF-based monolithic sorbents in sample preparation.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Zeng Wen, Ruihan Peng, Die Gao, Jing Lin, Jia Zeng, Zhou Li, Famin Ke, Zhining Xia, Dandan Wang
Summary: A chitosan-alginate sponge with multiple cross-linking networks was developed for adsorption and enrichment of anionic dyes from food samples. The sponge showed better three-dimensional network structure, mechanical behavior, and stability compared to pure chitosan and alginate sponges. The adsorption performance and selectivity of the sponge were systematically studied, and it maintained high adsorption capacity and selectivity for anionic dyes. The sponge also showed satisfactory reusability and was successfully combined with high-performance liquid chromatography for the enrichment and detection of anionic dyes in candy and cocktail samples.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Hairong Zhang, Xiaojuan Jiang, Dandan Zhang, Yuexin Yang, Qiang Xie, Caisheng Wu
Summary: Analysis of in vivo exposure to traditional Chinese medicine using mass spectrometry is helpful for identifying effective ingredients and developing new drugs. This study focused on Forsythia suspensa (Lian Qiao) and used metabolomics technology to explore its in vivo exposure. By comparing the differences before and after administration, a complete set of nontargeted analysis strategies for TCM exposure was established. The study identified 393 Lian Qiao-related chemical components in mice after administration, including prototypes and metabolites. This study provides a reference for research on the active ingredients of Lian Qiao in vivo.
JOURNAL OF CHROMATOGRAPHY A
(2024)
Article
Biochemical Research Methods
Oscar Castejon-Musulen, Ricardo Lopez, Ignacio Ontan, Vicente Ferreira
Summary: A quantitative analytical method was developed and validated in this study to determine the concentrations of 81 aroma-relevant wine volatiles. The method utilizes stir bar sorptive extraction and multidimensional gas chromatography with flame ionization detector or mass spectrometer. The method demonstrated good linearity, reproducibility, and recovery, and was successfully applied to analyze 20 wine samples.
JOURNAL OF CHROMATOGRAPHY A
(2024)
