Today, fresh food as well as convenience food is sold in packages. Hygienic conditions, long shelf life and easy availability of these packed products account for our standard of living. However, this convenience contributes in a significant way to environmental pollution, as packaging is mainly achieved by plastic materials in this case. Biodegradable packaging materials have been on the market for many decades. However, there are severe restrictions preventing their broad application in food packaging, as these materials do not provide the requested properties, such as a sufficient barrier against water vapour, oxygen or flavours. Our idea is to improve these properties by a biodegradable coating. We have developed high-barrier coatings based on a class of materials with glass-like structural units, so called ORMOCER®s. However, these coatings are not biobased, nor biodegradable.The target of the planned project is the development of new functional hybrid (inorganic-organic) coatings for applications in food, cosmetic & medical device packaging. These new coatings will be based on the work of Fraunhofer ISC who has patented and licensed ORMOCER® lacquers used for coating applications in order to increase barrier properties of packaging films. The aim of the planned project is to synthesise new coating materials based on bioORMOCER®s, which are formed of functionalised biopolymers extracted from lignocellulosic biomass sources using the bioORMOCER® synthesis approach. In particular, the polymeric structures of hemicelluloses and polyesters will be exploited. By the use of these biopolymer, the organoalkoxysilanes which are components of the state-of-the art ORMOCER® lacquers will be substituted to obtain a purely biobased functional coating material.The new functional bioORMOCER®s will be coated on flexible and rigid biopolymer substrates and tested for packaging applications for food, cosmetic and medical devices.