Profiles

Blanca Jalvo Sánchez

Blanca Jalvo Sánchez

Guest researcher/Post doc

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Arbetar vid Institutionen för miljövetenskap
E-post blanca.jalvo@aces.su.se
Besöksadress Svante Arrheniusväg 8 C, Geohuset
Postadress Institutionen för miljövetenskap 106 91 Stockholm

Om mig

Om mig/ About me

My current position in the Department of Materials and Environmental Chemistry at Stockholm University focuses mainly in the design, development and optimization of novel bio-based nanostructured polymer based membranes/adsorbents/filters with specific selectivity using surface-active entities like nanocellulose and nanochitin, among others, and combinations thereof.  

Education

  • PhD in Microbiology, Alcalá University, Madrid, Spain.
  • MSc. in Microbiology, Autónoma University, Madrid, Spain.
  • Bachelor degree in Biology, Autónoma University, Madrid, Spain

Research interest

  • Biofouling and biofilm formation in engineered surfaces
  • Control of cell-material interactions for the production of antimicrobial surfaces or biocompatible materials
  • Cellulose and chitin nanocrystals (CNCs, ChNCs) based nanocomposites using electrospinning and/or cast coating for environmental applications
  • Membrane technology for water purification

Ongoing/Past projects

  • 01.2018 – present: NanoTextSurf European Project (Horizon 2020): nanotextured surfaces are created on cellulose-based and other materials with various application techniques. The suitability of these materials will be demonstrated for, e.g., membrane, textile, friction control, and surface finishing applications
  • 2014-2017: CEREAL. Improved resource efficiency throughout the post-harvest chain of fresh-cut fruits and vegetables: The CEREAL project is one of the nine projects funded, in the 1st Joint Call for Proposals of the FP7-ERA-Net SUSFOOD. It proposes solution for the reduction of inputs in the process chain of fresh-cut fruits and vegetables while achieving high standards for chemical and microbiological safety. The project redefines key concepts concerning resource efficiency by reducing the use of water and energy and the amount of wastes generated during the whole food chain.
  • 2014-2017: REMTAVARES “Madrid network for advanced wastewater treatment with non- biodegradable pollutants”: project of scientific excellence and technological impact, has driven the Community of Madrid towards an excellent situation to consolidate its position as a national and international reference within the integrated water management field.
  • 2012-2014: Spanish National Project MICINN BIO 2009 08254: Focused in the improvement of the applications of Pseudomonas fluorescens F113 in integrated systems Plant / Microorganism: Biocontrol and rhizoremediation

Last publications 

  • Luis Valencia, Vishnu Arumughan, Blanca Jalvo, Hanna J. Maria, Sabu Thomas, Aji P. Mathew. Nanolignocellulose extracted from environmentally undesired Prosopis juliflora. ACS Omega, 4, 4330-4338, 2019. DOI: 10.1021/acsomega.8b02685
  • Luis Valencia, Sugam Kumar, Blanca Jalvo, Andreas Mautner, German Salazar-Alvarez, Aji P. Mathew. Fully bio-based zwitterionic membranes with superior antifouling and antibacterial properties prepared via surface-initiated free-radical polymerization of poly(cysteine methacrylate). Mater. Chem.A, 6, 16361, 2018. DOI: 10.1039/c8ta06095a
  • Candela Muriel, Eva Arrebola, Miguel Redondo-Nieto, Francisco Martínez-Granero, Blanca Jalvo, Sebastian Pfeilmeier, Esther Blanco-Romero, Irene Baena, Jacob G. Malone, Rafael Rivilla, Marta Martín. AmrZ is a major determinant of c-di-GMP levels in Pseudomonas fluorescens F113. Scientific Reports, (8) 1979, 2018. DOI:10.1038/s41598-018-20419-9
  • Blanca Jalvo, Marisol Faraldos, Ana Bahamonde, Roberto Rosal. Antibacterial surfaces prepared by electrospray coating of photocatalytic nanoparticles. Chemical Engineering Journal, 334, 1108-1118, 2017. https://doi.org/10.1016/j.cej.2017.11.057
  • Blanca Jalvo, Aji P. Mathew, Roberto Rosal. Coaxial poly (lactic acid) electrospun composite membranes incorporating cellulose and chitin nanocrystals. Journal of Membrane Science, 544, 151-161, 2017. http://dx.doi.org/10.1016/j.memsci.2017.09.033
  • Blanca Jalvo, Marisol Faraldos, Ana Bahamonde, Roberto Rosal. Antimicrobial selfcleaning surfaces functionalized with photocatalytic nanoparticles. Journal of Hazardous Materials, 340, 160-170, 2017. DOI: 10.1016/j.jhazmat.2017.07.005
  • Lee A. Goetz, Blanca Jalvo, Roberto Rosal, Aji P. Mathew. Superhydrophillic anti-fouling electrospun cellulose acetate membranes coated with chitin nanocrystals for water filtration. Journal of Membrane Science, 510, 238-248, 2016. DOI: 10.1016/j.memsci.2016.02.069.

 

Publikationer

I urval från Stockholms universitets publikationsdatabas
  • 2019. Dimitrios Georgouvelas (et al.).
  • 2019. Andrea Aguilar-Sánchez, Blanca Jalvo, Aji P. Mathew. Nordic Polymer Days 2019, 92-92

    Membrane technology is commonly used for filtration processes of industrial wastewater. Using membranes for water filtration is a safe and energy efficient solution. One of the main problems that arises during the usage of membranes is the fouling effects. Fouling increases the membrane separation resistance, reduces productivity due to a flux decline and affect membrane selectivity. These effects can be avoid by modifying the surface of the membranes using bio-based materials such as nano-cellulose. Nano-cellulose is a great example of a material obtained from renewable resources, which provides high reinforcement and antifouling properties to membranes.

    The aim of this work was the development of coatings with cellulose nano-crystals (CNC) and Tempooxidized cellulose nano-fribrils (T-CNF) using polyvinyl-alcohol (PVOH), as binding phase to enhance mechanical and antifouling properties over pure commercial PES membranes. The coatings were chemically crosslinked to increase mechanical properties and to improve stability of the coating and avoid swelling. It is expected that by avoiding swelling, permeability remains stable through time. All coating formulations remained stable after 10 hours of crossflow filtration. Mechanical properties of the coated membranes were improved in both dry and wet conditions, showing higher values of tensile strenght and E modulus compared to the uncoated ones. In addition, coated membranes showed high hydrophilicity and low adherence of bovine serum albumin (BSA).

    The coatings developed showed stability over PES membranes and provide them with a nanostructured surface which showed an extended durability in use. The modified surface membranes presented good mechanical properties in dry and wet conditions, high flux, high hydrophilicity, resistance to BSA fouling and to different pH environments. Moreover, these modified membranes showed promising results for fast upscaling at industrial level due to the simplicity of the coating process and the availability of the materials in the market.

  • 2019. Andrea Aguilar Sánchez, Blanca Jalvo, Aji P. Mathew.
  • 2019. Blanca Jalvo, Andrea Aguilar, Aji Mathew.
  • 2019. Luis Valencia (et al.).

    Rising sustainability demands the search of new low-market-value sources of lignocellulosic biomass as raw material for nanocellulose processing. In this paper, we accordingly propose the isolation of nanocellulose from Prosopis juliflora, an abundant but environmentally undesired tree. P. juliflora wood was powered, refined by steam explosion and bleaching, and subsequently used to isolate cellulose nanocrystals and nanofibers by means of acid hydrolysis and mechanical fibrillation. The derived nanocrystals had a rod-shaped structure with an average diameter of 20 nm and length of 150 nm, whereas the nanofibers had a diameter of 10 nm and length in micron size. Moreover, we report a simple method to isolate nanolignocellulose by using partially bleached P. juliflora as feedstock. The presence of lignin provided antioxidant and antimicrobial activity to nanocellulose, as well as hydrophobicity and increased thermal stability. The study demonstrates the successful use of P. juliflora to extract functional nanomaterials, which compensate for its environmental concern and declining market interest.

  • 2018. Luis Valencia (et al.). Journal of Materials Chemistry A 6 (34)

    This article proposes a strategy to prepare membranes that combine the network characteristics of micro/nanocellulose with grafted zwitterionic poly(cysteine methacrylate) (PCysMA) to develop fully bio-based membranes with antifouling properties. The surface characteristics of the membranes were studied, together with static adsorption of bovine serum albumin (BSA) and S. aureus for evaluating the antifouling properties of the membranes. Experimental data revealed a homogeneous modification that resulted in excellent antifouling properties with a reduction of 85% in biofilm formation and enhanced antimicrobial activity. Moreover, we introduced a novel method to determine the pore size of membranes in the wet-state and assess the antifouling performance in situ by synchrotron-based SAXS. This allowed us to observe in real-time the decrease in pore size upon adsorption of BSA during filtration, and how this phenomenon is strongly suppressed by grafting of PCysMA. The importance of this work lies in introducing a simple method to yield cellulosic membranes with superior antifouling properties, which could significantly increase their potential for water treatment applications.

Visa alla publikationer av Blanca Jalvo Sánchez vid Stockholms universitet

Senast uppdaterad: 18 februari 2020

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