@article {1890, title = { Macro porous tannin spray-dried powder scaffolds with stem cells for bone engineering }, journal = { MATERIALS CHEMISTRY AND PHYSICS }, volume = {239}, year = {2020}, abstract = {

Skeletal defects resulting from trauma and disease represent a major clinical problem worldwide, exacerbated further by global population growth and increasing number of elderly people. As treatment options are limited, bone tissue engineering opens the possibility to grow unlimited amount of tissue products with enhanced therapeutic potential for the management of clinical cases characterized by severe bone loss. Bone engineering relies on the use of compliant biomaterial scaffolds, osteocompetent cells, and biologically active agents. In this pinion paper, we drive the attention to a new application of a natural material: Tannin. Among others materials, porous tannin spray-dried powder (PTSDs) has approved to human use. We can use PTSDs as reconstructive materials with low cost, biocompatibility and potential ability to be replaced by bone in vivo. In this study macro PTSDS scaffolds with defined geometry, porosity and mechanical properties could be manufactured using a combination of casting technology and porogen leaching, by mixing PTSDs and hydroxyapatite (Ca10(PO4)6 (OH)2 with polyethylene glycol macro particles. The expected results show that the scaffolds developed could support attachment, long-term viability and osteogenic differentiation of human induced pluripotent stem cell-derived mesenchymal progenitors. The combination of select macro porous PTSDs scaffolds with patient-specific osteocompetent cells offers new opportunities to grow autologous bone grafts with enhanced clinical potential for complex skeletal reconstructions.

}, author = {S. ABDALLA and A. PIZZI and F.S. BAHABRI} } @article {1808, title = { Glutaraldehyde-wheat gluten protein adhesives for wood bonding }, journal = { JOURNAL OF ADHESION }, year = {2019}, abstract = {

Wheat gluten protein hydrolysate was used as a biomass feedstock to prepare environmentally friendly protein-based adhesives, with hydrolyzed wheat protein as control. Glutaraldehyde was used to modify it to obtain a glutaraldehyde-wheat protein (GP) adhesive. Polyethylenimine (PEI) was also used as a crosslinking agent. Plywood has been prepared and tested, and its performance was used to measure the wheat gluten protein hydrolysate adhesive bonding performance. Differential scanning calorimetry (DSC) and thermomechanical analysis (TMA) were used to analyze the adhesive thermal properties and the microstructures of the cured adhesives by scanning electron microscopy (SEM). The results show that modification by glutaraldehyde can effectively improve the bonding performance of wheat protein adhesives, the plywood bonded strength having been improved by its addition. The effect of PEI as a crosslinking agent became evident. It can greatly improve the bonding properties of glutaraldehyde-modified wheat protein adhesives. TMA analysis indicates that the glutaraldehyde-modified GP adhesive has a higher storage modulus than the unmodified one. The modulus of the adhesive increased after adding the PEI cross-linking agent.

}, author = {X.D. XI and A. PIZZI and C. GERARDIN and J.J. LIAO and S. AMIROU and S. ABDALLA} } @article {1757, title = { Synthesis, structure characterization and application of melamine-glyoxal adhesive resins }, journal = { EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS }, volume = {76}, year = {2018}, pages = {283-296}, abstract = {

To eliminate formaldehyde in melamine-formaldehyde (MF) resins the nonvolatile and nontoxic aldehyde glyoxal (G) was reacted with melamine to prepare novel melamine-glyoxal (MG) resins. These MG resins were synthesized with different M/G molar ratios, and their properties were tested. The liquid and hardened MG resins were characterized, and the oligomers formed and their distribution were determined by C-13 NMR and matrix assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF-MS). The energy of activation of cross-linking of the MG resins was found to be higher than for MF resins. This rendered some applications possible, such as MG resins impregnated paper surface overlays and showed such resins limitations as binders for wood particleboard. The MG resins remained stable at ambient temperature for more than 12 days.

}, author = {S. DENG and A. PIZZI and G. DU and M.C. LAGEL and L. DELMOTTE and S. ABDALLA} } @article {1679, title = { Analysis of the Cross-Linking Reaction of Lignin with Triethyl Phosphate by MALDI-TOF and C-13 NMR }, journal = {POLYMERS}, volume = {9}, year = {2017}, abstract = {

The reaction of condensation and cross-linking of desulfurized kraft lignin with triethyl phosphate (TEP) was explored. Catechol, a simple model of the aromatic ring of lignin, and glycerol, a model compound of the aliphatic hydroyl groups of the side chain of lignin, were employed under similar reaction conditions. Solid state cross-polarisation/magic-angle spinning (CP-MAS) C-13 NMR and matrix assisted laser desorption ionization time-of-flight (MALDI-TOF) spectroscopy studies showed that polycondensation occurs on phenolic hydroxyl groups of lignin, as well as on aliphatic hydroxyls groups of its side chain. The reactions appear to be favoured by higher temperatures and in the presence of ammonia. Preliminary adhesion tests on wood shown good hydrophobicity properties of the surface treated with lignin-TEP-based resin. Initial application tests carried out at high temperature demonstrated as good performance as metallic coating.

}, author = {M.C. BASSO and A. PIZZI and L. DELMOTTE and S. ABDALLA} } @article {1700, title = { Isocyanate-Free Polyurethanes by Coreaction of Condensed Tannins with Aminated Tannins }, journal = { JOURNAL OF RENEWABLE MATERIALS }, volume = {5}, year = {2017}, pages = {21-29}, abstract = {

Isocyanate-free polyurethane resins biosourced to a very high percentage level were prepared by the reaction of aminated mimosa tannin extract with commercial mimosa tannin extract prereacted with dimethyl carbonate. The reaction took place with ease at ambient temperature. Indications were that the polyurethanes obtained formed a hard film when cured at a temperature higher than 100 degrees C. Furthermore, the carbohydrate fraction of the tannin extract also appeared to be carbonated and reacted to generate isocyanate-free polyurethane linkages with the aminated tannins. This indicated that not only the polyphenolic fraction of the tannin extract, but also its other major component, can be used to prepare polyurethane resins. Flavonoid monomers and oligomers carbonated at different levels, both unreacted and urethane-linked to aminated flavonoid monomers and oligomers, were identified by FTIR and MALDI-TOF spectrometry.

}, author = {M. THEBAULT and A. PIZZI and F.J. SANTIAGO-MEDINA and F.M. AL-MARZOUKI and S. ABDALLA} } @article {1665, title = { Polycondensation Resins by Lignin Reaction with (Poly) amines }, journal = { JOURNAL OF RENEWABLE MATERIALS }, volume = {5}, year = {2017}, pages = {388-399}, abstract = {

The reaction of a desulphurized kraft lignin with hexamethylene diamine as a model of a polyamine has been investigated. For this purpose, guaiacol was also used as a lignin model compound and treated under similar conditions. Solid state CP-MAS C-13 NMR, FTIR and MALDI-TOF spectroscopy studies revealed that polycondensation compounds leading to resins were obtained by the reaction of the amines with the phenolic and aliphatic hydroxy groups of lignin. Simultaneously a second reaction leading to the formation of ionic bonds between the same groups occurred. These new reactions have been clearly shown to involve several phenolic and alcohol hydroxyl groups, as well as lignin units oligomerization, to form hardened resins.

}, author = {F.J. SANTIAGO-MEDINA and A. PIZZI and M.C. BASSO and L. DELMOTTE and S. ABDALLA} } @article {1670, title = { Preparation and characterization of bio resin natural tannin/poly (vinylidene fluoride): A high dielectric performance nano-composite for electrical storage }, journal = { CHEMICAL PHYSICS }, volume = {494}, year = {2017}, pages = {61-71}, abstract = {

We have prepared films of polymer nano-composite (PNC) of poly [vinylidene-fluoride] (PVDF) and bio resin natural tannin (BRNT) nanoparticles. The a and gamma electro-active phases were detected, and the addition of BRNT drastically increases the formation of the alpha-phase. Addition of BRNT produces up to 98\% of electro-active phases. Robust electrostatic interactions arise between charges at the BRNT-surfaces, and differences in electron affinity between CH2 and CF2 groups created dielectric dipoles. The addition of BRNT has not only enhanced the formation of the electrically active phases but also makes each dipole in the phase has its specific characteristics for example its own relaxation time. The AC-electrical permittivity showed that the dielectric constant of 10\% wt-BRNT nanoparticles in PVDF has a value 44 epsilon(0), which is four times more than the dielectric constant of the as-prepared PVDF films. These data show the importance of these polymers as easy, flexible, and durable energy storage materials.

}, author = {S. ABDALLA and A. PIZZI and M.A. AL-GHAMDI and R. ALWAFI} } @article {1686, title = { Stability and combustion of metal nano-particles and their additive impact with diesel and biodiesel on engine efficiency: A comprehensive study }, journal = { JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY }, volume = {9}, year = {2017}, abstract = {

Nano-fluids are described as a relatively new kind of colloidal solution with a particle size smaller than one billionth of a meter (1-100 nm) suspended in the base fluid so as to enhance the thermo-physical properties, which makes them an obvious choice for use in a number of commercial applications, including engineering, medical sciences, biotechnology, agriculture technology, and transportation. With the advancement in nanotechnology during the past few years, the scientific community focuses on improvising the combustion behavior, stability aspects, various engine performance parameters, and emission characteristics of conventional diesel engines using nano-particle laden diesel biodiesel fuel blends. Most recently, a few experimental works on the above issues using nano-sized metallic, non-metallic, organic, and mixed particles in the base liquid fuel for diesel engines have appeared in the open literature. The results obtained are very encouraging due to multifold enhancement in the thermo-physical and chemical properties of modified fuels, such as high surface to volume ratio, high reactive medium for combustion, enhanced heat and mass transport properties due to high thermal conductivity, and improvement in the flash point, fire point, pour point, etc., depending on the type of nano-particles used and their particle size and concentration with base fuels. Despite having all superiorities, somewhat unclear and contradictory results are found in the literature. Further, the experimental results of different researchers are not generalized so far as to reach a common consensus about this new approach of fuel modification. Keeping all these facts in mind, a serious attempt has been made to summarize important published work on combustion and stability aspects of nano-particle laden diesel, biodiesel fuels, and their blends and their overall effects on fuel and engine characteristics with the objective to provide a pathway to conduct further research in this area for utilizing the maximum potential of nanoparticle fuel emulsion technology and to provide a promising future fuel for diesel engines.

}, author = {S. ABDALLA and R. AL-WAFI and A. PIZZI} } @article {1625, title = { Automotive brake pads made with a bioresin matrix }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {85}, year = {2016}, pages = {372-381}, abstract = {

By using biosourced raw materials such as condensed tannins and furfuryl alcohol a biosourced thermoset resin was developed and used and tested for a new application: as a resin matrix of automotive brake pads. The manufacturing procedure developed is particularly easy. Automotive brake pads based on this green resin were characterized and showed excellent braking properties and wear resistance when used under real car, full scale test conditions. Their mechanical resistance was found to be comparable to that of commercial automotive brake pads bonded with synthetic phenolic resins. They tolerated well the severe stresses induced by a strong braking like an emergency braking: 50 km/h (31 mph) until complete standstill and showed braking distances comparable or shorter than commercial brake pads.

}, url = {https://hal.univ-lorraine.fr/hal-01599596}, author = {M.C. LAGEL and L. HAI and A. PIZZI and M.C. BASSO and L. DELMOTTE and S. ABDALLA and A. ZAHED and F.M. AL-MARZOUKI} } @article {1614, title = { Horticultural/hydroponics and floral natural foams from tannins }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {87}, year = {2016}, pages = {177-181}, abstract = {

New formaldehyde-free Quebracho tannin foams were developed for horticultural/hydroponics and floral applications. These foams included in their composition a wetting agent and at least one compound able to neutralize the residual acidity derived from acid catalyst. Their densities were between 0.048 and 0.066 g/cm(3) and compression strength, between 0.07 and 0.09 MPa. Scanning electron microscopy (SEM) images showed open porosity and average cell size of 125-250 mu m. Water absorption peaked at 98\% (vol) while residual pH value was 5. The new tannin foams do not result to be phytotoxic and are apt to the conservation of fresh cut flowers and as support matrices for horticulture and hydroponics. They have shown performances comparable or superior to commercial synthetic phenolic floral foam used as reference.

}, url = {https://hal.archives-ouvertes.fr/hal-01599593}, author = {M.C. BASSO and A. PIZZI and F. AL-MARZOUKI and S. ABDALLA} } @article {1390, title = { Analysis of Valonia Oak (Quercus aegylops) Acorn Tannin and Wood Adhesives Application }, journal = { BIORESOURCES }, volume = {10}, year = {2015}, pages = {7165-7177}, abstract = {

The coupling of matrix-assisted laser desorption/ionisation time-of-flight (MALDI-TOF) mass spectrometry with C-13 nuclear magnetic resonance (NMR) is a suitable method for examining the composition of hydrolysable tannins and has been applied to the investigation of valonia oak (Quercus aegylops) acorn tannin extract. Such methods can determine the extract\&$\#$39;s structural aspects and other characteristics. It was determined that valonia oak acorn tannin extract is composed of mainly pentagalloylglucose structures; their rearrangement structures, vescalagin/castalagin (with linkages to flavogallonic acid) and vescalin/castalin; ellagic acid and vescavaloneic/castavaloneic acid; and free gallic acid and glucose. Traces of catechin gallate were also observed in this tannin extract. The tannin from acorns of valonia oak was used to substitute up to 50\% of the phenol used in the preparation of phenolic resins as adhesives for wood particleboard. These phenol-tannin-formaldehyde resins showed comparable performance to phenol-formaldehyde resins.

}, author = {S. ABDALLA and A. PIZZI and F. BAHABRI and A. GANASH} } @article {1401, title = {Aningre tannin extract characterisation and performance as an adhesive resin}, journal = {Ind. Crop. Prod}, volume = { 77}, year = {2015}, pages = {225{\textendash}231 }, author = {N. KONAI and A. PIZZI and D. RAIDANDI and M.C. LAGEL and C. L{\textquoteright}HOSTIS and C. SAIDOU and A. HAMIDO and S. ABDALLA and F. BAHABRI and A. GANASH} } @article {1577, title = { Development and characterization of abrasive grinding wheels with a tannin-furanic resins matrix }, journal = { INDUSTRIAL CROPS AND PRODUCTS }, volume = {65}, year = {2015}, pages = {343-348}, abstract = {

A 100\% biosourced thermoset material based on condensed tannin-furanic thermoset resins, thus using biosourced raw materials, has been used as the resin matrix of solid grinding wheels. Moreover, this new thermoset material is produced by a simple process, which can be easily industrialized. Grinding wheels based on this resin bonding different mineral and organic abrasive powders were developed and characterized. These grinding wheels show excellent abrasiveness properties when compared to a commercial grinding wheel.

}, url = {https://hal.univ-lorraine.fr/hal-01597078}, author = {M.C. LAGEL and A. PIZZI and M.C. BASSO and S. ABDALLA} } @article {1558, title = { First Tools for Tannin-Furanic Foams Design }, journal = { BIORESOURCES }, volume = {10}, year = {2015}, pages = {5233-5241}, abstract = {

Formaldehyde-free quebracho tannin foams were prepared for the first time. Several simple formulations have been presented in order to study the capital influence of each component on foaming and therefore on the characteristics of the obtained foams. Incorporation of a non-ionic surfactant leads to smaller cells and a more homogeneous cell size distribution. Cross-linking agents improve the mechanical properties of foams. A combination of different catalysts allows control of the ratio between the expansion/hardening processes. The understanding of the roles and interactions of the different components of formulation make possible the design of tannin foams having specific properties.

}, url = {https://hal.archives-ouvertes.fr/hal-01294586}, author = {M.C. BASSO and M.C. LAGEL and A. PIZZI and A. CELZARD and S. ABDALLA} } @article {1389, title = {Furanic copolymers with synthetic and natural phenolic materials for wood adhesives - a MALDI TOF study}, journal = {Maderas-Cienc Tecnol}, year = {2015}, month = { 17/2015}, pages = {99 - 104}, author = {S. ABDALLA and A. PIZZI and F. BAHABRY and A. GANASH} } @article {1197, title = {Development and characterisation of abrasive grinding wheels with a tannin-furanic resin matrix. }, journal = {Ind. Crops \& Prod.}, year = {2014}, month = {11/2014}, author = {M.C. LAGEL and A. PIZZI and M.C. BASSO and S. ABDALLA} } @article {1166, title = {MALDI-TOF analysis of Aleppo pine (Pinus haleppensis) bark tannin. }, journal = {BioRessources}, volume = {9}, year = {2014}, month = {2014}, chapter = {3396}, author = {S. ABDALLA and A. PIZZI and N. AYED and F. CHARRIER-EL-BOUTHOURY and B. CHARRIER and F. BAHABRY and A GANASH} } @article {1170, title = {MALDI-TOF and 13C NMR analysis of Tunisian Zyzyphus jubjuba root bark tannins. }, journal = {Ind. Crops \& Prod.}, volume = {59}, year = {2014}, month = {2014}, chapter = {277}, author = {S. ABDALLA and A. PIZZI and N. AYED and F. CHARRIER and F. BAHARRY and A. GANASH} } @article {1199, title = {Tannin-furanic-polyurethane foams for industrial continuous plant lines}, journal = {Polymers}, volume = {6}, year = {2014}, month = {2014}, chapter = {2985}, author = {M.C. BASSO and A. PIZZI and C. LACOSTE and L. DELMOTTE and F.A. AL-MARZOUKI and S. ABDALLA and A. CELZARD} }