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B. Erdal N, Yao JG, Hakkarainen M. Cellulose-Derived Nanographene Oxide Surface-Functionalized Three-Dimensional Scaffolds with Drug Delivery Capability. Biomacromolecules 2018; 20:738-749. [DOI: 10.1021/acs.biomac.8b01421] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nejla B. Erdal
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Jenevieve G. Yao
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
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Xu Y, Hua G, Hakkarainen M, Odelius K. Isosorbide as Core Component for Tailoring Biobased Unsaturated Polyester Thermosets for a Wide Structure-Property Window. Biomacromolecules 2018; 19:3077-3085. [PMID: 29897737 DOI: 10.1021/acs.biomac.8b00661] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Biobased unsaturated polyester thermosets as potential replacements for petroleum-based thermosets were designed. The target of incorporating rigid units, to yield thermosets with high thermal and mechanical performance, both in the biobased unsaturated polyester (UP) and reactive diluent (RD) while retaining miscibility was successfully achieved. The biobased unsaturated polyester thermosets were prepared by varying the content of isosorbide, 1,4-butanediol, maleic anhydride, and succinic anhydride in combination with the reactive diluent isosorbide-methacrylate (IM). Isosorbide was chosen as the main component in both the UP and the RD to enhance the rigidity of the formed thermosets, to overcome solubility issues commonly associated with biobased UPs and RDs and volatility and toxicity associated with styrene as RD. All UPs had good solubility in the RD and the viscosity of the mixtures was primarily tuned by the feed ratio of isosorbide but also by the amount of maleic anhydride. The flexural modulus and storage modulus were tailorable by altering the monomer composition The fabricated thermosets had superior thermal and mechanical properties compared to most biobased UP thermosets with thermal stability up to about 250 °C and a storage modulus at 25 °C varying between 0.5 and 3.0 GPa. These values are close to commercial petroleum-based UP thermosets. The designed tailorable biobased thermosets are, thus, promising candidates to replace their petroleum analogs.
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Affiliation(s)
- Yunsheng Xu
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , Teknikringen 56 , 100 44 Stockholm , Sweden
| | - Geng Hua
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , Teknikringen 56 , 100 44 Stockholm , Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , Teknikringen 56 , 100 44 Stockholm , Sweden
| | - Karin Odelius
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , Teknikringen 56 , 100 44 Stockholm , Sweden
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Erdal NB, Hakkarainen M. Construction of Bioactive and Reinforced Bioresorbable Nanocomposites by Reduced Nano-Graphene Oxide Carbon Dots. Biomacromolecules 2018; 19:1074-1081. [DOI: 10.1021/acs.biomac.8b00207] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Nejla B. Erdal
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
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Affiliation(s)
- Eva Bäckström
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Karin Odelius
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
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Affiliation(s)
- Ann-Christine Albertsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
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56
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Pal J, Wu D, Hakkarainen M, Srivastava RK. The viscoelastic interaction between dispersed and continuous phase of PCL/HA-PVA oil-in-water emulsion uncovers the theoretical and experimental basis for fiber formation during emulsion electrospinning. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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57
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Michalak M, Kwiecien I, Kwiecien M, Adamus G, Odelius K, Hakkarainen M, Kurcok P. Diversifying Polyhydroxyalkanoates – End-Group and Side-Chain Functionality. Curr Org Synth 2017. [DOI: 10.2174/1570179414666161115150146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background: Polyhydroxyalkanoates (PHAs) are a natural origin biodegradable polyesters consisted
of various 3- and 4-hydroxyacid derived repeating units produced by microorganisms as energy storage.
PHAs have been intensively studied due to their biodegradability and biocompatibility enabling their use both
in packaging and agriculture as well as in medicine and pharmacy. PHAs obtained via biotechnological routes
can possess various functional groups in their side chains. However, the diversity in their functionality is limited
due to issues of conservation of functional groups during the polymer formation.
Objective: The review focuses on recent progress in the area of synthesis of PHAs functionalized with various
reactive as well as bioactive end and side groups.
Conclusion: A potent route to resolve the problem of functional group diversity in natural origin PHAs involves
post-polymerization modification, where the desired side groups can be created. On the contrary, synthetically
produced PHA analogs obtained directly via ring-opening polymerization of β-lactones offer various
functionalities at different position throughout the polymer chain. The desired α- and ω-end groups can be introduced
into the polymer chain using specific polymerization, initiation or termination strategies, respectively.
The preferred side chain functionality is obtained by choosing the appropriate β-lactone monomers bearing respective
functional groups. All functional groups may also be subjected to additional chemical modification.
The degradation of PHA as a method for producing functional polymers as well as their possible further applications
are also discussed.
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Affiliation(s)
- Michal Michalak
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland
| | - Iwona Kwiecien
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34, M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland
| | - Michal Kwiecien
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34, M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland
| | - Grazyna Adamus
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34, M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland
| | - Karin Odelius
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, S-10044 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, S-10044 Stockholm, Sweden
| | - Piotr Kurcok
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 M. Curie-Sklodowskiej St., 41-819 Zabrze, Poland
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Xu H, Xie L, Li J, Hakkarainen M. Coffee Grounds to Multifunctional Quantum Dots: Extreme Nanoenhancers of Polymer Biocomposites. ACS Appl Mater Interfaces 2017; 9:27972-27983. [PMID: 28770986 DOI: 10.1021/acsami.7b09401] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Central to the design and execution of nanocomposite strategies is the invention of polymer-affinitive and multifunctional nanoreinforcements amenable to economically viable processing. Here, a microwave-assisted approach enabled gram-scale fabrication of polymer-affinitive luminescent quantum dots (QDs) from spent coffee grounds. The ultrasmall dimensions (approaching 20 nm), coupled with richness of diverse oxygen functional groups, conferred the zero-dimensional QDs with proper exfoliation and uniform dispersion in poly(l-lactic acid) (PLLA) matrix. The unique optical properties of QDs were inherited by PLLA nanocomposites, giving intensive luminescence and high visible transparency, as well as nearly 100% UV-blocking ratio in the full-UV region at only 0.5 wt % QDs. The strong anchoring of PLLA chains at the nanoscale surfaces of QDs facilitated PLLA crystallization, which was accompanied by substantial improvements in thermomechanical and tensile properties. With 1 wt % QDs, for example, the storage modulus at 100 °C and tensile strength increased over 2500 and 69% compared to those of pure PLLA (4 and 57.3 MPa), respectively. The QD-enabled energy-dissipating and flexibility-imparting mechanisms upon tensile deformation, including the generation of numerous shear bands, crazing, and nanofibrillation, gave an unusual combination of elasticity and extensibility for PLLA nanocomposites. This paves the way to biowaste-derived nanodots with high affinity to polymer for elegant implementation of distinct light management and extreme nanoreinforcements in an ecofriendly manner.
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Affiliation(s)
- Huan Xu
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology , Stockholm 10044, Sweden
- ENN Graphene Technology Co., Ltd., ENN Group , Langfang 065001, China
| | - Lan Xie
- Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University , Guiyang 550025, China
| | - Jinlai Li
- ENN Graphene Technology Co., Ltd., ENN Group , Langfang 065001, China
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology , Stockholm 10044, Sweden
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Wu D, Bäckström E, Hakkarainen M. Macromol. Biosci. 6/2017. Macromol Biosci 2017. [DOI: 10.1002/mabi.201770020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Duo Wu
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Eva Bäckström
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
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Wu D, Samanta A, Srivastava RK, Hakkarainen M. Starch-Derived Nanographene Oxide Paves the Way for Electrospinnable and Bioactive Starch Scaffolds for Bone Tissue Engineering. Biomacromolecules 2017; 18:1582-1591. [DOI: 10.1021/acs.biomac.7b00195] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Duo Wu
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Archana Samanta
- Department
of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Rajiv K. Srivastava
- Department
of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Salazar Avalos A, Hakkarainen M, Odelius K. Superiorly Plasticized PVC/PBSA Blends through Crotonic and Acrylic Acid Functionalization of PVC. Polymers (Basel) 2017; 9:E84. [PMID: 30970763 PMCID: PMC6431921 DOI: 10.3390/polym9030084] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 02/15/2017] [Accepted: 02/22/2017] [Indexed: 11/30/2022] Open
Abstract
Superior plasticization efficiency was achieved by a grafting from functionalization of the PVC backbone. This was deduced to a synergistic effect of internal plasticization and improved intermolecular interactions between PVC and an oligomeric poly(butylene succinate-co-adipate) (PBSA) plasticizer. A mild grafting process for functionalization of the PVC chain by crotonic acid (CA) or acrylic acid (AA) was used. The formation of PVC-g-CA and PVC-g-AA was confirmed by FTIR and ¹H NMR. Grafting with the seemingly similar monomers, CA and AA, resulted in different macromolecular structures. AA is easily homopolymerized and long hydrophilic poly(acrylic acid) grafts are formed resulting in branched materials. Crotonic acid does not easily homopolymerize; instead, single crotonic acid units are located along the PVC chain, leading to basically linear PVC chains with pendant crotonic acid groups. The elongation of PVC-g-CA and PVC-g-AA in comparison to pure PVC were greatly increased from 6% to 128% and 167%, respectively, by the grafting reactions. Blending 20% (w/w) PBSA with PVC, PVC-AA or PVC-CA further increased the elongation at break to 150%, 240% and 320%, respectively, clearly showing a significant synergistic effect in the blends with functionalized PVC. This is a clearly promising milestone towards environmentally friendly flexible PVC materials.
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Affiliation(s)
- Arturo Salazar Avalos
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - Karin Odelius
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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62
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Wu D, Bäckström E, Hakkarainen M. Starch Derived Nanosized Graphene Oxide Functionalized Bioactive Porous Starch Scaffolds. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201600397] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/06/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Duo Wu
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Eva Bäckström
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; SE-100 44 Stockholm Sweden
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63
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Xu H, Hua G, Odelius K, Hakkarainen M. Macromol. Chem. Phys. 23/2016. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201670074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Huan Xu
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Geng Hua
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
| | - Karin Odelius
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
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Affiliation(s)
- Michał Michalak
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; M Curie-Skłodowskiej 34 41-819 Zabrze Poland
| | - Piotr Kurcok
- Centre of Polymer and Carbon Materials; Polish Academy of Sciences; M Curie-Skłodowskiej 34 41-819 Zabrze Poland
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm Sweden
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65
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Affiliation(s)
- Huan Xu
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
- College of Polymer Science and Engineering; State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Geng Hua
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
| | - Karin Odelius
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm 100 44 Sweden
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66
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Golda-Cepa M, Chorylek A, Chytrosz P, Brzychczy-Wloch M, Jaworska J, Kasperczyk J, Hakkarainen M, Engvall K, Kotarba A. Multifunctional PLGA/Parylene C Coating for Implant Materials: An Integral Approach for Biointerface Optimization. ACS Appl Mater Interfaces 2016; 8:22093-22105. [PMID: 27500860 DOI: 10.1021/acsami.6b08025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Functionalizing implant surfaces is critical for improving their performance. An integrated approach was employed to develop a multifunctional implant coating based on oxygen plasma-modified parylene C and drug-loaded, biodegradable poly(dl-lactide-co-glycolide) (PLGA). The key functional attributes of the coating (i.e., anti-corrosion, biocompatible, anti-infection, and therapeutic) were thoroughly characterized at each fabrication step by spectroscopic, microscopic, and biologic methods and at different scales, ranging from molecular, through the nano- and microscales to the macroscopic scale. The chemistry of each layer was demonstrated separately, and their mutual affinity was shown to be indispensable for the development of versatile coatings for implant applications.
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Affiliation(s)
- M Golda-Cepa
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
| | - A Chorylek
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
| | - P Chytrosz
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
| | - M Brzychczy-Wloch
- Department of Bacteriology, Microbial Ecology and Parasitology, Jagiellonian University Medical College , Czysta 18, 31-121 Krakow, Poland
| | - J Jaworska
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences , Curie Skłodowskiej 34, 41-819 Zabrze, Poland
| | - J Kasperczyk
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences , Curie Skłodowskiej 34, 41-819 Zabrze, Poland
| | - M Hakkarainen
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology , SE-100 44 Stockholm, Sweden
| | - K Engvall
- Department of Chemical Engineering and Technology, KTH Royal Institute of Technology , SE-100 44 Stockholm, Sweden
| | - A Kotarba
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
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Xie L, Xu H, Li Z, Hakkarainen M. Macromol. Rapid Commun. 9/2016. Macromol Rapid Commun 2016; 37:808. [DOI: 10.1002/marc.201670039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lan Xie
- College of Materials and Metallurgy Guizhou University Guiyang 550025 China
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
| | - Huan Xu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm 100 44 Sweden
| | - Zhong‐Ming Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm 100 44 Sweden
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68
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Yang X, Xu H, Odelius K, Hakkarainen M. Poly(lactide)-g-poly(butylene succinate-co-adipate) with High Crystallization Capacity and Migration Resistance. Materials (Basel) 2016; 9:ma9050313. [PMID: 28773437 PMCID: PMC5503035 DOI: 10.3390/ma9050313] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 04/12/2016] [Accepted: 04/19/2016] [Indexed: 11/16/2022]
Abstract
Plasticized polylactide (PLA) with increased crystallization ability and prolonged life-span in practical applications due to the minimal plasticizer migration was prepared. Branched plasticized PLA was successfully obtained by coupling poly(butylene succinate-co-adipate) (PBSA) to crotonic acid (CA) functionalized PLA. The plasticization behavior of PBSA coupled PLA (PLA-CA-PBSA) and its counterpart PBSA blended PLA (PLA/PBSA) were fully elucidated. For both PLA-CA-PBSA and PLA/PBSA, a decrease of Tg to around room temperature and an increase in the elongation at break of PLA from 14% to 165% and 460%, respectively, were determined. The crystallinity was increased from 2.1% to 8.4% for PLA/PBSA and even more, to 10.6%, for PLA-CA-PBSA. Due to the inherent poor miscibility between the PBSA and PLA, phase separation occurred in the blend, while PLA-CA-PBSA showed no phase separation which, together with the higher crystallinity, led to better oxygen barrier properties compared to neat PLA and PLA/PBSA. A higher resistance to migration during hydrolytic degradation for the PLA-CA-PBSA compared to the PLA/PBSA indicated that the plasticization effect of PBSA in the coupled material would be retained for a longer time period.
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Affiliation(s)
- Xi Yang
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - Huan Xu
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - Karin Odelius
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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69
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Xie L, Xu H, Li Z, Hakkarainen M. Structural Hierarchy and Polymorphic Transformation in Shear‐Induced Shish‐Kebab of Stereocomplex Poly(Lactic Acid). Macromol Rapid Commun 2016; 37:745-51. [DOI: 10.1002/marc.201500736] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 01/31/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Lan Xie
- College of Materials and Metallurgy Guizhou University Guiyang 550025 China
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
| | - Huan Xu
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm 100 44 Sweden
| | - Zhong‐Ming Li
- College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm 100 44 Sweden
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Lyytinen T, Bragge T, Hakkarainen M, Liikavainio T, Karjalainen P, Arokoski J. Repeatability of knee impulsive loading measurements with skin-mounted accelerometers and lower limb surface electromyographic recordings during gait in knee osteoarthritic and asymptomatic individuals. J Musculoskelet Neuronal Interact 2016; 16:63-74. [PMID: 26944825 PMCID: PMC5089457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVES To determine the repeatability of knee joint impulsive loading measurements with skin-mounted accelerometers (SMAs) and lower limb surface electromyography (EMG) recordings during gait. METHODS Triaxial SMA and EMG from 4 muscles during level and stair walking in nine healthy and nine knee osteoarthritis (OA) subjects were used. The initial peak acceleration (IPA), root mean square (RMS), maximal acceleration transient rate (ATRmax) and mean EMG activity (EMGact) were calculated. The coefficient of variation (CV) and the intraclass correlation coefficient (ICC) were calculated to measure repeatability. RESULTS The CV and ICC of RMS accelerations ranged from 4.9% to 10.9% and from 0.69 to 0.96 in both study groups during level walking. The CV and ICC of IPA and ATRmax varied from 7.7% to 14.2% and from 0.85 to 0.99 during level and stairs up walking in healthy subjects. The CV and ICC of EMGact ranged from 8.3% to 31.7% and from 0.16 to 0.97 in both study groups. CONCLUSIONS RMS accelerations exhibited good repeatability during walking in healthy and knee OA subjects. The repeatability of EMG measurements was acceptable in healthy subjects depending on the measured muscles.
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Affiliation(s)
- T. Lyytinen
- Department of Physical and Rehabilitation Medicine, Kuopio University Hospital, Kuopio, Finland,Palokka Health Center, Jyväskylä, Finland,Corresponding author: Tarja Lyytinen, MD, Department of Physical and Rehabilitation Medicine, Kuopio University Hospital P.O.B. 100, FI-70029 Kuopio, Finland E-mail:
| | - T. Bragge
- Department of Applied Physics, University of Eastern Finland
| | - M. Hakkarainen
- Department of Applied Physics, University of Eastern Finland
| | | | | | - J.P. Arokoski
- Department of Physical and Rehabilitation Medicine, Kuopio University Hospital, Kuopio, Finland,Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
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71
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Xu H, Yang X, Xie L, Hakkarainen M. Conformational Footprint in Hydrolysis-Induced Nanofibrillation and Crystallization of Poly(lactic acid). Biomacromolecules 2016; 17:985-95. [DOI: 10.1021/acs.biomac.5b01636] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Huan Xu
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Xi Yang
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
| | - Lan Xie
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
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72
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Abstract
Starch-derived nGO is an efficient compatibilizer and property enhancer for high performance PLA/starch biocomposites.
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Affiliation(s)
- Duo Wu
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- Royal Institute of Technology (KTH)
- SE-100 44 Stockholm
- Sweden
| | - Huan Xu
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- Royal Institute of Technology (KTH)
- SE-100 44 Stockholm
- Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- Royal Institute of Technology (KTH)
- SE-100 44 Stockholm
- Sweden
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73
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Hassanzadeh S, Adolfsson KH, Wu D, Hakkarainen M. Supramolecular Assembly of Biobased Graphene Oxide Quantum Dots Controls the Morphology of and Induces Mineralization on Poly(ε-caprolactone) Films. Biomacromolecules 2015; 17:256-61. [DOI: 10.1021/acs.biomac.5b01339] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salman Hassanzadeh
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Karin H. Adolfsson
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Duo Wu
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fiber and Polymer
Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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74
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Hassanzadeh S, Feng Z, Pettersson T, Hakkarainen M. A proof-of-concept for folate-conjugated and quercetin-anchored pluronic mixed micelles as molecularly modulated polymeric carriers for doxorubicin. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.08.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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75
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Golda-Cepa M, Brzychczy-Wloch M, Engvall K, Aminlashgari N, Hakkarainen M, Kotarba A. Microbiological investigations of oxygen plasma treated parylene C surfaces for metal implant coating. Materials Science and Engineering: C 2015; 52:273-81. [DOI: 10.1016/j.msec.2015.03.060] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 03/25/2015] [Indexed: 12/16/2022]
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76
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Yang X, Clénet J, Xu H, Odelius K, Hakkarainen M. Two Step Extrusion Process: From Thermal Recycling of PHB to Plasticized PLA by Reactive Extrusion Grafting of PHB Degradation Products onto PLA Chains. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00235] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Xi Yang
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Jocelyn Clénet
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Huan Xu
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Karin Odelius
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden
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77
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Xu H, Wu D, Yang X, Xie L, Hakkarainen M. Thermostable and Impermeable “Nano-Barrier Walls” Constructed by Poly(lactic acid) Stereocomplex Crystal Decorated Graphene Oxide Nanosheets. Macromolecules 2015. [DOI: 10.1021/ma502603j] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Huan Xu
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 10044, Sweden
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Duo Wu
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - Xi Yang
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - Lan Xie
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu 610065, China
- Department
of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 10044, Sweden
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78
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79
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Affiliation(s)
- Xi Yang
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 58 100 44 Stockholm Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 58 100 44 Stockholm Sweden
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80
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Abstract
The 3D supramolecular association behavior of the synthesized 2D graphene oxide quantum dots (GOQDs) could be smartly controlled in dilute aqueous solutions to tune their final properties.
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Affiliation(s)
- Salman Hassanzadeh
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Karin H. Adolfsson
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- KTH Royal Institute of Technology
- Stockholm
- Sweden
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81
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Hassanzadeh S, Khoee S, Beheshti A, Hakkarainen M. Release of quercetin from micellar nanoparticles with saturated and unsaturated core forming polyesters — A combined computational and experimental study. Materials Science and Engineering: C 2015; 46:417-26. [DOI: 10.1016/j.msec.2014.10.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/16/2014] [Accepted: 10/21/2014] [Indexed: 11/26/2022]
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82
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Abstract
Valorization of cellulose and waste paper to value-added 2D graphene oxide quantum dots through 3D carbon nanosphere intermediates from microwave assisted hydrothermal degradation.
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Affiliation(s)
- Karin H. Adolfsson
- Department of Fiber and Polymer Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - Salman Hassanzadeh
- Department of Fiber and Polymer Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - Minna Hakkarainen
- Department of Fiber and Polymer Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
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83
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Hassanzadeh S, Aminlashgari N, Hakkarainen M. Chemo-selective high yield microwave assisted reaction turns cellulose to green chemicals. Carbohydr Polym 2014; 112:448-57. [DOI: 10.1016/j.carbpol.2014.06.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 06/06/2014] [Accepted: 06/07/2014] [Indexed: 10/25/2022]
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84
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85
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Bor Y, Alin J, Hakkarainen M. Polylactide stereocomplexation leads to reduced migration during microwave heating in contact with food simulants. J FOOD ENG 2014. [DOI: 10.1016/j.jfoodeng.2014.02.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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86
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Momtazi L, Bagherifam S, Singh G, Hofgaard A, Hakkarainen M, Glomm WR, Roos N, Mælandsmo GM, Griffiths G, Nyström B. Synthesis, characterization, and cellular uptake of magnetic nanocarriers for cancer drug delivery. J Colloid Interface Sci 2014; 433:76-85. [PMID: 25112915 DOI: 10.1016/j.jcis.2014.07.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 07/07/2014] [Accepted: 07/08/2014] [Indexed: 01/22/2023]
Abstract
HYPOTHESIS The absence of targetability is the primary inadequacy of conventional chemotherapy. Targeted drug delivery systems are conceptualized to overcome this challenge. We have designed a targetable magnetic nanocarrier consisting of a superparamagnetic iron oxide (SPIO) core and biocompatible and biodegradable poly(sebacic anhydride)-block-methyl ether poly(ethylene glycol) (PSA-mPEG) polymer shell. The idea is that this type of carriers should facilitate the targeting of cancer cells. EXPERIMENTS PSA-mPEG was synthesized with poly-condensation and the in vitro degradation rate of the polymer was monitored by gel permeation chromatography (GPC). The magnetic nanocarriers were fabricated devoid of any surfactants and were capable of carrying high payload of hydrophobic dye. The successful encapsulation of SPIO within the polymer shell was confirmed by TEM. The results we obtained from measuring the size of SPIO loaded in polymeric NPs (SPIO-PNP) by dynamic light scattering (DLS) and iron content measurement of these particles by ICP-MS, indicate that SPIO is the most suitable carrier for cancer drug delivery applications. FINDINGS Measuring the hydrodynamic radii of SPIO-PNPs by DLS over one month revealed the high stability of these particles at both body and room temperature. We further investigated the cell viability and cellular uptake of SPIO-PNPs in vitro with MDA-MB-231 breast cancer cells. We found that SPIO-PNPs induce negligible toxicity within a concentration range of 1-2μg/ml. The TEM micrographs of thin cross-sectioned MDA-MBA-231 cells showed internalization of SPIO-PNPs within size range of 150-200nm after 24h. This study has provided a foundation for eventually loading these nanoparticles with anti-cancer drugs for targeted cancer therapy using an external magnetic field.
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Affiliation(s)
- Leva Momtazi
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway.
| | - Shahla Bagherifam
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway; Department of Biology, University of Oslo, Blindernveien 31, 0316 Oslo, Norway.
| | - Gurvinder Singh
- Department of Chemical Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Antje Hofgaard
- Department of Biology, University of Oslo, Blindernveien 31, 0316 Oslo, Norway.
| | - Minna Hakkarainen
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden.
| | - Wilhelm R Glomm
- Biotechnology and Nanomedicine Sector, SINTEF Materials and Chemistry, Sem Sælands vei 2A, N-7034 Trondheim, Norway.
| | - Norbert Roos
- Department of Biology, University of Oslo, Blindernveien 31, 0316 Oslo, Norway.
| | - Gunhild M Mælandsmo
- Department of Tumor Biology, Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.
| | - Gareth Griffiths
- Department of Biology, University of Oslo, Blindernveien 31, 0316 Oslo, Norway.
| | - Bo Nyström
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway.
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87
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Xu H, Xie L, Jiang X, Hakkarainen M, Chen JB, Zhong GJ, Li ZM. Structural Basis for Unique Hierarchical Cylindrites Induced by Ultrahigh Shear Gradient in Single Natural Fiber Reinforced Poly(lactic acid) Green Composites. Biomacromolecules 2014; 15:1676-86. [DOI: 10.1021/bm500100z] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Huan Xu
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Lan Xie
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Xin Jiang
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Minna Hakkarainen
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
| | - Jing-Bin Chen
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Gan-Ji Zhong
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
| | - Zhong-Ming Li
- College
of Polymer Science and Engineering, State Key Laboratory of Polymer
Materials Engineering, Sichuan University, Chengdu, 610065, Sichuan, People’s Republic of China
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88
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Gołda-Cępa M, Aminlashgari N, Hakkarainen M, Engvall K, Kotarba A. LDI-MS examination of oxygen plasma modified polymer for designing tailored implant biointerfaces. RSC Adv 2014. [DOI: 10.1039/c4ra02656j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A versatile parylene C coating for biomaterials was fabricated by the mild oxygen plasma treatment and examined by the use of LDI-MS..
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Affiliation(s)
- M. Gołda-Cępa
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Krakow, Poland
| | - N. Aminlashgari
- Department of Fibre and Polymer Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm, Sweden
| | - M. Hakkarainen
- Department of Fibre and Polymer Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm, Sweden
| | - K. Engvall
- Department of Chemical Engineering and Technology
- KTH Royal Institute of Technology
- SE-100 44 Stockholm, Sweden
| | - A. Kotarba
- Faculty of Chemistry
- Jagiellonian University
- 30-060 Krakow, Poland
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89
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Lindell-Osuagwu L, Hakkarainen M, Sepponen K, Vainio K, Naaranlahti T, Kokki H. Prescribing for off-label use and unauthorized medicines in three paediatric wards in Finland, the status before and after the European Union Paediatric Regulation. J Clin Pharm Ther 2013; 39:144-53. [DOI: 10.1111/jcpt.12119] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 11/20/2013] [Indexed: 11/29/2022]
Affiliation(s)
| | - M. Hakkarainen
- School of Pharmacy; University of Eastern Finland; Kuopio Finland
| | - K. Sepponen
- School of Pharmacy; University of Eastern Finland; Kuopio Finland
| | - K. Vainio
- School of Pharmacy; University of Eastern Finland; Kuopio Finland
| | - T. Naaranlahti
- Pharmacy Department; Kuopio University Hospital; Kuopio Finland
| | - H. Kokki
- Department of Anaesthesiology and Intensive Care; Kuopio University Hospital; University of Eastern Finland; Kuopio Finland
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90
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Aminlashgari N, Höglund OV, Borg N, Hakkarainen M. Degradation profile and preliminary clinical testing of a resorbable device for ligation of blood vessels. Acta Biomater 2013; 9:6898-904. [PMID: 23438863 DOI: 10.1016/j.actbio.2013.02.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 01/11/2013] [Accepted: 02/05/2013] [Indexed: 11/18/2022]
Abstract
A resorbable device for ligation of blood vessels was developed and tested in vitro to reveal the degradation profile of the device and to predict the clinical performance in terms of adequate mechanical support during a healing period of 1week. In addition, preliminary clinical testing was performed that showed complete hemostasis and good tissue grip of renal arteries in five pigs. The device was made by injection molding of poly(glycolide-co-trimethylene carbonate) triblock copolymer, and it consisted of a case with a locking mechanism connected to a partly perforated flexible band. A hydrolytic degradation study was carried out for 7, 30 and 60days in water and buffer medium, following the changes in mass, water absorption, pH and mechanical properties. A new rapid matrix-free laser desorption ionization-mass spectrometry (LDI-MS) method was developed for direct screening of degradation products released into the degradation medium. The combination of LDI-MS and electrospray ionization-mass spectrometry analyses enabled the comparison of the degradation product patterns in water and buffer medium. The identified degradation products were rich in trimethylene carbonate units, indicating preferential hydrolysis of amorphous regions where trimethylene units are located. The crystallinity of the material was doubled after 60days of hydrolysis, additionally confirming the preferential hydrolysis of trimethylene carbonate units and the enrichment of glycolide units in the remaining solid matrix. The mechanical performance of the perforated band was followed for the first week of hydrolysis and the results suggest that sufficient strength is retained during the healing time of the blood vessels.
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Affiliation(s)
- Nina Aminlashgari
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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91
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Alin J, Hakkarainen M. Combined chromatographic and mass spectrometric toolbox for fingerprinting migration from PET tray during microwave heating. J Agric Food Chem 2013; 61:1405-15. [PMID: 23343184 DOI: 10.1021/jf3047847] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A combined chromatographic and mass spectrometric toolbox was utilized to determine the interactions between poly(ethylene terephthalate) (PET) food packaging and different food simulants during microwave heating. Overall and specific migration was determined by combining weight loss measurements with gas chromatography-mass spectrometry (GC-MS) and electrospray ionization mass spectrometry (ESI-MS). This allowed mapping of low molecular weight migrants in the molecular range up to 2000 g/mol. Microwave heating caused significantly faster migration of cyclic oligomers into ethanol and isooctane as compared to migration during conventional heating at the same temperature. This effect was more significant at lower temperature at which diffusion rates are generally lower. It was also shown that transesterification took place between PET and ethanol during microwave heating, leading to formation of diethyl terephthalate. The detected migrants included cyclic oligomers from dimer to hexamer, in most cases containing extra ethylene glycol units, and oxidized Irgafos 168. ESI-MS combined with CID MS-MS was an excellent tool for structural interpretation of the nonvolatile compounds migrating to the food simulants. The overall migration was below the overall migration limit of 10 mg/dm(2) set by the European commission after 4 h of microwave heating at 100 °C in all studied food simulants.
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Affiliation(s)
- Jonas Alin
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden
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92
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93
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Aminlashgari N, Hakkarainen M. Surface assisted laser desorption ionization-mass spectrometry (SALDI-MS) for analysis of polyester degradation products. J Am Soc Mass Spectrom 2012; 23:1071-1076. [PMID: 22392621 DOI: 10.1007/s13361-012-0360-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 02/03/2012] [Accepted: 02/06/2012] [Indexed: 05/31/2023]
Abstract
Novel surface assisted laser desorption ionization-mass spectrometry (SALDI-MS) method was developed for rapid analysis of low molecular mass polyesters and their degradation products by laser desorption ionization-mass spectrometry. Three polycaprolactone materials were analyzed by the developed method before and after hydrolytic degradation. The signal-to-noise values obtained by SALDI-MS were 20-100 times higher compared with the ones obtained by using traditional MALDI-MS matrices. A clean background at low mass range and higher resolution was obtained by SALDI-MS. Different nanoparticle, cationizing agent, and solvent combinations were evaluated. Halloysite nanoclay and magnesium hydroxide showed the best potential as SALDI surfaces. The SALDI-MS spectrum of the polyester hydrolysis products was verified by ESI-MS. The developed SALDI-MS method possesses several advantages over existing methods for similar analyses.
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Affiliation(s)
- Nina Aminlashgari
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden
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94
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Andersson SR, Hakkarainen M, Albertsson AC. Long-term properties and migration of low molecular mass compounds from modified PLLA materials during accelerated ageing. Polym Degrad Stab 2012. [DOI: 10.1016/j.polymdegradstab.2012.03.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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95
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Regnell Andersson S, Hakkarainen M, Inkinen S, Södergård A, Albertsson AC. Customizing the Hydrolytic Degradation Rate of Stereocomplex PLA through Different PDLA Architectures. Biomacromolecules 2012; 13:1212-22. [DOI: 10.1021/bm300196h] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Sofia Regnell Andersson
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm,
Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm,
Sweden
| | - Saara Inkinen
- Laboratory of Polymer
Technology,
Center for Functional Materials (FUNMAT), Åbo Akademi University, Piispankatu 8, 20100 Turku, Finland
| | - Anders Södergård
- Laboratory of Polymer
Technology,
Center for Functional Materials (FUNMAT), Åbo Akademi University, Piispankatu 8, 20100 Turku, Finland
| | - Ann-Christine Albertsson
- Department of Fibre and Polymer
Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm,
Sweden
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96
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Alin J, Hakkarainen M. Microwave heating causes rapid degradation of antioxidants in polypropylene packaging, leading to greatly increased specific migration to food simulants as shown by ESI-MS and GC-MS. J Agric Food Chem 2011; 59:5418-5427. [PMID: 21513311 DOI: 10.1021/jf1048639] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Microwave heating of commercial microwavable polypropylene packaging in contact with fatty food simulants caused significant antioxidant degradation and increased specific migration as shown by electrospray ionization-mass spectrometry (ESI-MS) and gas chromatography-mass spectrometry (GC-MS). Degradation of the antioxidants Irgafos 168 and Irganox 1010 was not detected during conventional heating of polypropylene packaging at the same temperature. The migration into aqueous food simulants was primarily restricted by the water solubility of the migrants. Using isooctane as fatty food simulant caused significant swelling and greatly enhanced overall migration values compared to the other fatty food simulant, 99.9% ethanol, or the aqueous food simulants 10% ethanol, 3% acetic acid, or water. ESI-MS spectra clearly reflected the overall migration values, and the number and amount of compounds detected decreased as the hydrophilicity of the food simulant increased. ESI-MS was shown to be an excellent tool for the analysis of semivolatile migrants and a good complement to GC-MS analysis of volatile migrants.
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Affiliation(s)
- Jonas Alin
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), Stockholm, Sweden
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97
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Abstract
Plastic waste disposal is one of the serious environmental issues being tackled by our society today. Polyethylene, particularly in packaging films, has received criticism as it tends to accumulate over a period of time, leaving behind an undesirable visual footprint. Degradable polyethylene, which would enter the eco-cycle harmlessly through biodegradation would be a desirable solution to this problem. However, the "degradable polyethylene" which is presently being promoted as an environmentally friendly alternative to the nondegradable counterpart, does not seem to meet this criterion. This article reviews the state of the art on the aspect of degradability of polyethylene containing pro-oxidants, and more importantly the effect these polymers could have on the environment in the long run. On exposure to heat, light, and oxygen, these polymers disintegrate into small fragments, thereby reducing or increasing the visual presence. However, these fragments can remain in the environment for prolonged time periods. This article also outlines important questions, particularly in terms of time scale of complete degradation, environmental fate of the polymer residues, and possible accumulation of toxins, the answers to which need to be established prior to accepting these polymers as environmentally benign alternatives to their nondegradable equivalents. It appears from the existing literature that our search for biodegradable polyethylene has not yet been realized.
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Affiliation(s)
- Prasun K Roy
- Centre for Fire, Explosive and Environment Safety, DRDO, Timarpur, Delhi 110054, India
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98
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Dånmark S, Finne-Wistrand A, Schander K, Hakkarainen M, Arvidson K, Mustafa K, Albertsson AC. In vitro and in vivo degradation profile of aliphatic polyesters subjected to electron beam sterilization. Acta Biomater 2011; 7:2035-46. [PMID: 21316490 DOI: 10.1016/j.actbio.2011.02.011] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 01/13/2011] [Accepted: 02/07/2011] [Indexed: 11/29/2022]
Abstract
Degradation characteristics in response to electron beam sterilization of designed and biodegradable aliphatic polyester scaffolds are relevant for clinically successful synthetic graft tissue regeneration. Scaffold degradation in vitro and in vivo were documented and correlated to the macroscopic structure and chemical design of the original polymer. The materials tested were of inherently diverse hydrophobicity and crystallinity: poly(L-lactide) (poly(LLA)) and random copolymers from L-lactide and ε-caprolactone or 1,5-dioxepan-2-one, fabricated into porous and non-porous scaffolds. After sterilization, the samples underwent hydrolysis in vitro for up to a year. In vivo, scaffolds were surgically implanted into rat calvarial defects and retrieved for analysis after 28 and 91days. In vitro, poly(L-lactide-co-1,5-dioxepan-2-one) (poly(LLA-co-DXO)) samples degraded most rapidly during hydrolysis, due to the pronounced chain-shortening reaction caused by the sterilization. This was indicated by the rapid decrease in both mass and molecular weight of poly(LLA-co-DXO). Poly(L-lactide-co-ε-caprolactone) (poly(LLA-co-CL)) samples were also strongly affected by sterilization, but mass loss was more gradual; molecular weight decreased rapidly during hydrolysis. Least affected by sterilization were the poly(LLA) samples, which subsequently showed low mass loss rate and molecular weight decrease during hydrolysis. Mechanical stability varied greatly: poly(LLA-co-CL) withstood mechanical testing for up to 182 days, while poly(LLA) and poly(LLA-co-DXO) samples quickly became too brittle. Poly(LLA-co-DXO) samples unexpectedly degraded more rapidly in vitro than in vivo. After sterilization by electron beam irradiation, the three biodegradable polymers present widely diverse degradation profiles, both in vitro and in vivo. Each exhibits the potential to be tailored to meet diverse clinical tissue engineering requirements.
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Affiliation(s)
- S Dånmark
- Centre for Clinical Dental Research, Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Norway
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99
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Odelius K, Höglund A, Kumar S, Hakkarainen M, Ghosh AK, Bhatnagar N, Albertsson AC. Porosity and pore size regulate the degradation product profile of polylactide. Biomacromolecules 2011; 12:1250-8. [PMID: 21344847 DOI: 10.1021/bm1015464] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Porosity and pore size regulated the degradation rate and the release of low molar mass degradation products from porous polylactide (PLA) scaffolds. PLA scaffolds with porosities above 90% and different pore size ranges were subjected to hydrolytic degradation and compared to their solid analog. The solid film degraded fastest and the degradation rate of the porous structures decreased with decreasing pore size. Degradation products were detected earlier from the solid films compared to the porous structures as a result of the additional migration path within the porous structures. An intermediate degradation rate profile was observed when the pore size range was broadened. The morphology of the scaffolds changed during hydrolysis where the larger pore size scaffolds showed sharp pore edges and cavities on the scaffold surface. In the scaffolds with smaller pores, the pore size decreased during degradation and a solid surface was formed on the top of the scaffold. Porosity and pore size, thus, influenced the degradation and the release of degradation products that should be taken into consideration when designing porous scaffolds for tissue engineering.
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Affiliation(s)
- Karin Odelius
- Department of Fibre and Polymer Technology, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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100
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Inkinen S, Hakkarainen M, Albertsson AC, Södergård A. From Lactic Acid to Poly(lactic acid) (PLA): Characterization and Analysis of PLA and Its Precursors. Biomacromolecules 2011; 12:523-32. [DOI: 10.1021/bm101302t] [Citation(s) in RCA: 495] [Impact Index Per Article: 38.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Saara Inkinen
- Laboratory of Polymer Technology, Center for Functional Materials (FUNMAT), Åbo Akademi University, Piispankatu 8, 20100 Turku, Finland
| | - Minna Hakkarainen
- The Royal Institute of Technology (KTH), Department of Fibre and Polymer Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Ann-Christine Albertsson
- The Royal Institute of Technology (KTH), Department of Fibre and Polymer Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Anders Södergård
- Laboratory of Polymer Technology, Center for Functional Materials (FUNMAT), Åbo Akademi University, Piispankatu 8, 20100 Turku, Finland
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