Ilona Leppänen

ORCID: 0000-0003-1807-3411
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About
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Research Areas
  • Advanced Cellulose Research Studies
  • Microplastics and Plastic Pollution
  • Polysaccharides and Plant Cell Walls
  • Electrospun Nanofibers in Biomedical Applications
  • Optical Coherence Tomography Applications
  • Nanoparticles: synthesis and applications
  • DNA and Nucleic Acid Chemistry
  • Nanocomposite Films for Food Packaging
  • Gene Regulatory Network Analysis
  • Polydiacetylene-based materials and applications
  • biodegradable polymer synthesis and properties
  • Supercapacitor Materials and Fabrication
  • Recycling and Waste Management Techniques
  • Silk-based biomaterials and applications
  • Advancements in Battery Materials
  • Research in Social Sciences
  • Advanced Sensor and Energy Harvesting Materials
  • Advanced biosensing and bioanalysis techniques

VTT Technical Research Centre of Finland
2019-2023

Aalto University
2022

Tieto (Finland)
2019-2022

Abstract In this study an optical cellulose fiber for water sensoring was prepared by using a sequential preparation strategy. The core of the from dissolved cellulose, in [EMIM]OAc, which dry–wet spun into water. cladding layer on produced coating acetate, acetone, filament coater. chemical and properties both regenerated acetate were studied cast films ultraviolet–visible Fourier-transform infrared spectroscopy measurements. Regenerated film observed to absorb UV light, passing visible...

10.1007/s10570-019-02882-3 article EN cc-by Cellulose 2019-11-25

In this study, we investigated the enzymatical degradability and pilot-scale composting of 14 cellulose-based materials. The materials analyzed here were cellulose regenerated from ionic liquid (EMIM[OAc]), carboxymethyl (CMC) crosslinked by aluminum salt (Al-salt), methyl cellulose, acetate, butylated hemicellulose: DS: 1, 0.4, 0.2, cellophane, wet strength paper, nanocellulose, paper partially dissolved IL, carbamate, palmitate, octanoate. aim study was to show how chemical substituting...

10.1007/s10924-019-01621-w article EN cc-by Journal of Polymers and the Environment 2019-11-27

Microplastics accumulate in various aquatic organisms causing serious health issues, and have raised concerns about human by entering our food chain. The recovery techniques for the most challenging colloidal fraction are limited, even analytical purposes. Here we show how a hygroscopic nanocellulose network acts as an ideal capturing material tiniest nanoplastic particles. We reveal that entrapment of particles from aqueous environment is primarily result network's nature - feature which...

10.1038/s41467-022-29446-7 article EN cc-by Nature Communications 2022-04-05

Four different types of crystalline and fibrillar nanocellulosic materials with functional groups (sulfate, carboxylate, amino-silane) are produced used to disperse commercial multiwalled carbon nanotubes (MWCNT). Aqueous nanocellulose/MWCNT dispersions drop-cast on tetrahedral amorphous (ta-C) substrates obtain highly stable composite electrodes. Their electrochemical properties studied using cyclic voltammetry (CV) measurements Ru(NH3)62+/3+, IrCl62–/3– redox probes, in electrolytes ionic...

10.1021/acsanm.1c00774 article EN ACS Applied Nano Materials 2021-06-14

Abstract Polymer composites with nanocellulose as the reinforcing agent often lack good compatibility between two components. In this study, we have combined cellulose nanofibrils (CNFs) and nanocrystals (CNCs) in different ratios to create all-cellulose films consisting of entirely discrete objects that complement each other. Then further, by applying controlled dissolution concept were able defined optical patterns on films. The 50% CNCs showed equivalent mechanical barrier properties when...

10.1007/s10570-022-04795-0 article EN cc-by Cellulose 2022-09-02

Abstract Natural materials, such as silk and cellulose, have an inspiring set of properties, which evolved over hundreds millions years. In this study, cellulose nanocrystals (CNCs) regenerated fibroin (RSF) are combined to evaluate their suitability for filament formation. This is assessed by tuning characterizing the interactions between these two materials finally studying alignment mixtures under shear. To modify CNCs silk, with varying surface functionalities (sulfate and/or aminosilane...

10.1002/admi.202300162 article EN cc-by Advanced Materials Interfaces 2023-06-04

Abstract Microplastics accumulate to various aquatic organisms causing serious health issues, and they have raised concerns about human by entering our food chain. The recovery techniques for the most challenging colloidal fraction even analytical purposes are limited. Here we show how hygroscopic nanocellulose network acts as an ideal capturing material tiniest nanoplastic particles. We reveal that entrapment of particles from aqueous environment is a result network’s nature - feature which...

10.21203/rs.3.rs-286541/v1 preprint EN cc-by Research Square (Research Square) 2021-04-13

Abstract Significant importance in the stiffness of materials, such as filaments and films, made elongated components, has been attributed to orientation. Thus, control orientation during manufacturing materials target process optimization for long time. Measuring allows better grasp means it. In fact, online tools would enable on-fly improving flexibility with regards raw used, application requirements. this article, we will discuss a method based on polarization-sensitive optical coherence...

10.1007/s10570-023-05072-4 article EN cc-by Cellulose 2023-03-02

Abstract Significant importance in the stiffness of materials, such as filaments and films, made elongated components, has been attributed to orientation. Thus, control orientation during manufacturing materials target process optimization for long time. Measuring allows better grasp means it. In fact, on-line tools would enable on-fly improving flexibility with regards raw used, application requirements. this article, we will discuss a method based on Polarization Sensitive Optical...

10.21203/rs.3.rs-1623420/v1 preprint EN cc-by Research Square (Research Square) 2022-07-01
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