Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal Logos

Fractionation of AgroResources and Environment lab

20 October 2021 - Development of a biobased nanocomposite for electrical insulation

20 October 2021 - Development of a biobased nanocomposite for electrical insulation
This study contributes to the improvement of the electrical properties of nanocomposites based on oil- and bio-based polymers reinforced with lamellar clay

This work results from a PhD thesis whose objective was the development by twin-screw extrusion of nanocomposites based on different formulations of polypropylene (PP) and biobased poly(butylene succinate) (PBS), filled with various levels of organomodified montmorillonite, varying between 0 and 10 wt%. The morphological, structural, physico-chemical, mechanical and electrical properties of these nanocomposites were characterized. A comparative study of the different formulations made it possible to select composites with optimized mechanical and electrical properties. The results show an intercalated and partially exfoliated morphology for relatively high clay levels and a reduction in the size of the nodules of the dispersed phase with the clay content. The morphology has also an influence on the mechanical behaviour of the blends. For relatively low clay content, the electrical insulation properties of nanocomposites are improved.

This work was made possible thanks to funding from the URCA and the agglomeration of Grand Reims (PhD of Mouhja Bencharki).

This publication was made possible through a collaboration between researchers from the MATIM laboratory (URCA) and FARE laboratory, with fundings from URCA and Grand Reims for PhD thesis of Mouhja Bencharki.

Read: Bencharki M, Rondot S*, Tara A, Jbara O, Berzin F. Electrical and mechanical properties of partially bio-based PP/PBS blends nanocomposites elaborated by twin screw extrusion. Journal of Applied Polymer Science 2021, 138, 51401. DOI

Contact: Pr Françoise Berzin,