Pectin modification with a solvent free process for the formulation of drug delivery systems

MAHE J., ¹. CHAMBIN O., ¹. BRACHAIS C. H., ¹. COUVERCELLE J. P., ¹.

Corresponding author:Joaquim Mahé E-mail:Joaquim.Mahe@u-bourgogne.fr

¹University of Bourgogne-Franche-Comté ICMUB, UMR CNRS 6302 Department of Pharmaceutical Technology, UMR PAM, PCAV team, Agrosup 9 Avenue Alain Savary 21000 Dijon France

Abstract:

For the last decades, pectin has become one of the most studied material for drug targeting and biomedical applications. This biopolymer is an abundant polysaccharide extracted from plant cell walls which shows many interesting biological, economical and chemical properties. Due to its specific structure, pectin reveals a rapid hydration, swelling and dissolution in water. This fast dissolution appears as a major drawback for the formulation of drug delivery systems and dressings. Thus, the aim of this work is to increase the hydrophobicity of natural pectin by chemical modification. This work presents an esterification route using octenyl succinic anhydride for bringing hydrophobic segments onto pectin. The described process is achieved under solventless condition and the new materials are used to formulate a drug delivery system. .

MOSQUITO REPELLENCY OF POLYESTER NETS TREATED WITH CYCLODEXTRIN/REPELLENT COMPLEXES

Miró Specos M. M. ,¹. Topollan D. Y., ¹. Arata J., ². Zannoni V., ². Volmajer Valh J., ³. Garcia J., ⁴. Gutierrez A. C., ⁴. Voncina B., ³. Hermida L. G., ².

Corresponding author:Miro Specos Maria Magdalena E-mail:mmiro@inti.gob.ar

¹Instituto Nacional de Tecnologı´a Industrial (INTI), Centro de Textiles – Edificio 13, Avenida General Paz 5445 B1650WAB San Martı´n, Buenos Aires, Argentina
²Instituto Nacional de Tecnologı´a Industrial (INTI), Centro de Quı´mica – Edificio 38, Avenida General Paz 5445 B1650WAB San Martı´n, Buenos Aires, Argentina
³Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
⁴Centro de Estudios Parasitológicos y de Vectores (CEPAVE), La Plata (BsAs), Argentina

Abstract:

Fabric treatments with β-Cyclodextrins (β-CD) have been studied for different applications as nanotechnologycal approaches to achieve functional textiles. In particular, repellents and insecticides have been incorporated in β-CD treated textiles to prolong their release. In this case, Citriodiol®, a naturally derived mosquito repellent, was incorporated to β-CD treated polyester (PET) nets. Two methods for citriodiol inclusion were studied; i) pipette dripping or ii) impregnation of fabric in a plastic bag, in order to increase the repellent activity of PET textile substrates. Release profiles were analyzed by gas chromatography and repellency was monitored by in vivo assays with Aedes aegypti mosquitoes. Long lasting and reloadable mosquito repellent nets could be achieved by treating PET knits with citriodiol/β-CD complexes.

Impact of thermal treatments applied to PET vascular prostheses on fabric contextures and fiber surface features

KHLIF H., ¹. Dhouib S., ¹. Saber BEN ABDESSALEM S., ². Sakly F., ¹.

Corresponding author:Khlif Helmi E-mail:helmi.khlif@yahoo.fr

¹Textile Engineering Laboratory, University of Monastir, Ksar-Hellal, Tunisia
²Textile Materials and Processes Research Unit, University of Monastir, Monastir, Tunisia

Abstract:

For more than sixty years textile vascular prostheses have saved millions human lives, but achieving attributes of a native artery still remains a challenge. Graft failures have been, in part, assigned to the prosthesis finishing processes, generally based on thermal treatments. These ones enable to reduce the water permeability and fix the wavy form of prosthetic tube walls involved by crimping processes. Four tubular structures have been woven with various polyester yarns (Setila, Dacron, Diolen and Viscosuisse) and then thermally crimped according to a predefinite protocol. The aim was to investigate the impact of crimping thermal treatments on the prosthetic fabric contextures and the fiber surface features. Optical microscopy showed tight compact warp-faced structures which became less porous after finishing treatments. Thermomechanical crimping constraints gave rise to some flattening traces, observed by SEM on Setila and Diolen fibers. All filaments presented smooth surfaces and round sections except Dacron ones which have irregular diameter and helical configuration resulting from texturing processes. This aspect decreased after prosthesis finishing, indicating an attenuation of the yarn texturing effect. Dacron filament surface is also partially marked by annular streaks, slightly protruding with pointed and sharp edges. Such a shape could be explained by the "skin-core" structure of these fibers, but its mechanical impact on the prosthesis performance remains unknown..

EVALUATION OF SEAM QUALITY RESISTANCE USING THE FUZZY THEORY

Malek S., ¹. Jouachi B., ¹. Khedher F.,¹. Cheikhrouhou M.,¹.

Corresponding author:malek sarah E-mail:maleksarah88@gmail.com

¹Textile Engineering Laboratory, University of Monastir, Tunisia

Abstract:

This study deals with the evaluation of the impact of sewing threads properties and sewing conditions on the seam quality of denim fabrics. A fabrics having a large range of masses and different blend compositions are chosen. Besides, different stitch lengths and different seam threads linear densities are considered. Their performance ranked according to the quality of the seams after sewing is controlled. The seam quality parameters (seam efficiency and seam slippage) were studied using a dynamometer type LLOYD instruments. The statistical analysis steps were implemented using fuzzy modelling method, thanks to MATLAB-17 software. Based on the obtained results, fuzzy modelling method can widely predict the seam efficiency and seam slippage of sewing denim fabrics. Comparing the four obtained models, we find that Fuzzy model is relatively well verified with our tested database particularly when using a triangular membership function. .

ECO-FRIENDLY DYEING OF MODIFIED COTTON FABRICS USING OLIVE DYES EXTRACTED FROM OLIVE MILL WASTEWATER: FOCUS ON DYEING QUALITIES AND ENVIRONMENTAL PERFORMANCES

Meksi, N. ¹. Haddar W., ². Baaka N., ¹. Mejri M., ³. Mhenni M.F., ¹.

Corresponding author:Meksi Nizar E-mail:nizar_meksi@yahoo.fr

¹University of Monastir, Faculty of Sciences of Monastir, Research Unit of Applied Chemistry and Environment, 5019 Monastir, Tunisia
²2University of Monastir, National Engineering School of Monastir, Textile Engineering Department, 5019 Monastir, Tunisia
³4EPI Educational Group, 4021 Sousse, Tunisia

Abstract:

Olive dyes extracted from stocked olive mill wastewater (OMW) were successfully adsorbed on several modified cotton fabrics giving brown shades with generally good dyeing fastnesses. The results showed also that modified cottons with Tannic acid (commercial polyphenol compound) and with Croscolor DRT (commercial cationising agent) had high affinity to the colouring matters of the OMW. The maximum colour yields were found at an initial pH of OMW. The use of mordanting processes offered deep shades and enhanced fastness properties, especially in the case of post-mordanting with ferrous sulphate. Besides, it was found that cationised cotton with Croscolor DRT absorbed more polyphenols and reduced more the Biological oxygen demand BOD5 of dyeing bath than modified cotton with Tannic acid. However, modified cotton with Tannic acid reduced more the Chemical oxygen demand COD of dyebath. .