Grape Canes (Vitis vinifera L.) Applications on Packaging and Particleboard Industry: New Bioadhesive Based on Grape Extracts and Citric Acid

Abstract

The main by-product generated in the wine industry are the grape canes, derived from the pruning process. In order to increase the valorisation possibilities of this highly polyphenolic lignocellulosic material, this work focuses on its applicability in the materials industry. As a first step, we demonstrate the viability of using grape cane particles as raw material for particleboard production, combined with a melamine formaldehyde urea (MFU) binder. In addition, looking for the application of these particleboards in the food packaging industry, particleboards based on grape canes were also produced using a new bioadhesive, obtained from the grape cane extract and citric acid. The self-condensation reaction of the grape cane extracts, and the curing reaction with citric acid, were studied by FTIR-ATR and ABES showing the feasibility of this new bioadhesive formulation. Looking for a zero-waste process, the effect of the type of raw material (fresh grape cane, solid by-product of the extraction) and of the extract used on the properties of particleboard were also studied. Citric acid was demonstrated to be a good crosslinking agent for grape cane extract. This work shows that it is possible to produce a new lignocellulosic product based only on grape cane particles using a binder based on grape cane extracts and citric acid. The implemented methodology allowed producing particleboards with applicability in the food-packaging industry, minimizing the waste generated in the process.

Effect of the Citric acid on the Properties of Sapwood of Pinus sylvestris Submitted to Thermomechanical Treatment

“…This result corroborates with [24] and [25], who verified an increase of esterification reactions after applying citric acid on wood panels of Sorghum bicolor L. Monech and Vitis vinifera L., respectively.…”

Evolution in the Bottling of Cabernet Sauvignon Wines Macerated with Their Own Toasted Vine-Shoots

“…Vine-shoots can be considered the actual raw material for trans -resveratrol isolation, − so the significant contribution of SEGs to wines related to this compound was expected and has been previously reported in research where vine-shoots have been used as enological additives. − In this work, the trans- resveratrol content in D1-B wine was 3.73 mg/L at bottling time and three times higher in D2-B wines (2.11 mg/L) than in the control wine. However, although bottle aging decreased the concentration of this compound to undetected levels in the control wine, its concentration in SEG wines remained higher than normally detected in red wine. , It is known that trans -resveratrol has numerous potential biological activities, so the results again support the potential benefits of these wines.…”

Recent progress of biomass in conventional wood adhesives: a review

“…The utilization of a combination of citric acid and urea as catalyst and copolymer in MF and MFU resins was first confirmed. Furthermore, Santos et al 82 also proved the feasibility of utilizing grape cane particles as a raw material for the manufacturing of particleboard. In particleboard production, it is combined with MFU resin and catalyzed by citric acid.…”