http://www.mtdna.or.kr/neowiz/board/up_files/files_17/Chitin_Chitosan_polymers_chemistrySolubilityFiberFormation.pdf

Chitin and chitosan polymers: Chemistry, solubility and fiber formation

The growing ecological and environmental consciousness has driven efforts for development of new innovative materials for various end-use applications. Polymers synthesized from natural resources, have gained considerable research interest in the recent years. This review paper is intended to provide a brief outline of work that covers in the area of biocomposites, major class of biodegradable polymers, natural fibres, as well as their manufacturing techniques and properties has been highlighted. Various surface modification methods were incorporated to improve the fibre–matrix adhesion resulting in the enhancement of mechanical properties of the biocomposites. Moreover, an economical impact and future direction of these materials has been critically reviewed. This review concludes that the biocomposites form one of the emerging areas in polymer science that gain attention for use in various applications ranging from automobile to the building industries.

A review of the recent developments in biocomposites based on natural fibres and their application perspectives

Fourier Transform Infrared Spectroscopy: Applications to Chemical Systems Vol 1 Edited by J R Ferraro and L J Basile Pp 311 (Academic: New York, San Francisco and London, 1978) $25; £1625

Fourier transform infrared spectroscopy

Ultraviolet rays constitute a very low fraction in the solar spectrum but influence all living organisms and their metabolisms. These radiations can cause a range of effects from simple tanning to highly malignant skin cancers, if unprotected. Sunscreen lotions, clothing and shade structures provide protection from the deleterious effects of ultraviolet radiations. Alterations in the construction parameters of fabrics with appropriate light absorbers and suitable finishing methods can be employed as UV protection fabrics. This paper deals with the deleterious effects of UV rays and protection against them through textile materials.

/pdf/uv-protection-textile-materials-336g3fbob7.pdf

Uv protection textile materials

Surface and thermal characterization of natural fibres treated with enzymes

Technical University of Lodz Faculty of Material Technologies and Textile Design Department of Fibres Physics and Textile Metrology, Center of Advanced Technology Pro Humano Tex ul. Żeromskiego 116, 90924 Łodź, Poland E-mail: symon@p.lodz.pl Abstract Bamboo fi bres are gaining more and more attention on the world market. Producers claim that their products are made from natural, ecological material of many exceptional properties characteristic for natural bamboo fi bres. There are many obscurities involving bamboo fi bres, which lead potential clients to misunderstandings. In the world a campaign is underway to reveal the truth behind these questionable fi bres. In this paper, the authors try to prove, by scientifi c means, that so-called bamboo fi bres are in reality man-made viscose fi bres made from bamboo cellulose.

/pdf/new-commercial-fibres-called-bamboo-fibres-their-structure-2eo2qyl8x9.pdf

New Commercial Fibres Called 'Bamboo Fibres' - Their Structure and Properties

The barrier properties of model fabrics as a protection against UV radiation have been examined by measuring the UV absorbing capacity of polymers of selected fibres containing dulling agents and optical brightening agents.

/pdf/examination-of-the-absorption-properties-of-various-fibres-593esg1zyr.pdf

Examination of the absorption properties of various fibres in relation to UV radiation

The enzymatic treatment of textiles significantly improves some of their properties as well as increases their aesthetic values and comfort of use. Enzymes can be used in order to develop environmentally friendly processes by reducing the concentration of chemical agents, water and energy consumption. In the case of wool fibres, it is possible to substitute conven tional chlorine treatment by the enzymatic process, which enables to receive a fabric of the same level of anti-shrinking and anti-felting properties. The application of enzymes in the wool modification process was studied, and it was proven that the application of enzymes has an important influence on changes in the surface structure, which are accompanied by changes in certain physicochemical properties of wool fibres and fabrics.

/pdf/research-on-the-enzymatic-treatment-of-wool-fibres-and-54n0x3uge6.pdf

Research on the Enzymatic Treatment of Wool Fibres and Changes in Selected Properties of Wool

The paper deals with the assessment of the surface modification of glossy continuous poly(ethylene terephthalate) fibers from the point of view of changes in their surface structure in terms of its micro-topography and the molecular and supermolecular structure of the filament surface layers. The performed SEM and AFM investigations have shown differences in the fiber surface carving before and after modification (smoothing or increased roughness), depending on the type of applied enzymatic preparation. Measurements with the use of the ATR-IR method have shown changes in the physicochemical character of the investigated fiber surface. The cleavage of the ester bonds in PET macromolecular chains, resulting from the modifications used, leads to the formation of reactive OH and COOH groups. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

The influence of enzymatic treatment on the surface modification of PET fibers

Polyester fibres are characterised by a low surface energy and limited reactivity. To use them as components of composites or to impart to them specific surface properties required in various applications, one has to modify their surface by appropriate methods. The incorporation of new functional groups as a result of a reaction with a proper chemical substance is one of the possible changes in the physical and chemical character of the fibre surface. In order to restrict any change in the polymer to the fibre surface layer only, leaving the internal part unchanged, it is required to select appropriate chemicals and experimental conditions.

Barbara Lipp-Symonowicz

Papers

New Commercial Fibres Called 'Bamboo Fibres' - Their Structure and Properties

Examination of the absorption properties of various fibres in relation to UV radiation

Research on the Enzymatic Treatment of Wool Fibres and Changes in Selected Properties of Wool

The influence of enzymatic treatment on the surface modification of PET fibers

Comparison of the Effect of PET Fibres’ Surface Modification Using Enzymes and Chemical Substances with Respect to Changes in Mechanical Properties