Latest News on Textile Engineering : Nov 2020

Using OWA aggregation technique in QFD: a case study in education in a textile engineering department

Quality Function Deployment (QFD) is a systematic approach that considers customer needs through design, production, marketing, and support stages. Customer needs are the main input for QFD, so voice of customer must be understood well and changes, innovations, and treatments must be held in this view. In QFD applications, determining the priorities of customer needs is a fairly important stage. This is mostly held by Analytic Hierarchy Process (AHP) a multicriteria decision making technique. Nonetheless, Ordered Weighted Averaging (OWA) is an aggregation technique mostly used in decision making for multicriteria decision problems. So, combining these two techniques will give a different viewpoint for prioritizing the customer needs in QFD applications. The aim of this study is to show the use of Ordered Weighted Averaging (OWA) aggregation technique in QFD applications. For this purpose a case study in Dokuz Eylül University Textile Engineering Department was held. It was aimed to support the efforts on increasing the education quality by determining the students’ needs and opinions using QFD with OWA. [1]

Finding all k-cliques in k-partite graphs, an application in textile engineering

In many practical cases one has to choose an arrangement of different objects so that they are compatible. Whenever the compatibility of the objects can be checked by a pair-wise comparison the problem can be modelled using the graph–theoretic notion of cliques. We consider a special case of the problem where the objects can be grouped so that exactly one object in every group has to be chosen. This object has to be compatible to every other object selected from the other groups. The problem was motivated by a braiding application from textile technology. The task is to route a set of thread-spools (bobbins) on a machine from their origins to their destinations so that collisions are avoided. We present a new model and algorithm in order to solve this important practical problem. [2]

Differential-difference model for textile engineering

Woven fabric is manifestly not a continuum and therefore Darcy’s law or its modifications, or any other differential models are invalid theoretically. A differential-difference model for air transport in discontinuous media is introduced using conservation of mass, conservation of energy, and the equation of state in discrete space and continuous time, capillary pressure is obtained by dimensional analysis. [3]

Structural Characterization of Sandbox Seed Oil-Modified Alkyd Resin

Aim: To synthesize alkyd resin from sandbox seed oil and characterize the alkyd based on the physicochemical and structural properties.

Place and Duration of Study: Department of Polymer and Textile Engineering, and Department of Soil Science Technology, both at Federal University of Technology, Owerri, Imo state, Nigeria, from July 2014 to October 2014.

Methodology: Sandbox seed were properly dried, ground and sieved through a 2 mm mesh size sieve to obtain a fine powder. The seed oil was extracted by bulk cold extraction method using n-hexane, and the oil was characterized to determine the density, acid value, peroxide value, saponification value, iodine value and free fatty acid value. The oil was later converted to alkyd resin through a two stage process of alcoholysis and esterification. FTIR spectroscopy was used to analyze the functional groups present in the alkyd resin and compared with a commercial alkyd resin.

Results: The results on physicochemical analysis showed a high acid value of 149.066 when compared with other seed oils, a weight percentage fatty acid content of 74.931% confirmed it as long oil since it is greater than 55%. The resulting alkyd resin was characterized to determine its viscosity and the FTIR spectra. The results of FTIR give an absorption band at wavelength above 3000 cm-1 which confirm the material as organic compound. The FTIR analysis shows a similarity with the FTIR result of a commercially available alkyd resin, it indicates similar functional group and chemical structure. Therefore considering the results above, alkyd resin from the sandbox tree is suitable as a binder in coating industry. [4]

Influence of Water Repellent Treatment on the UV Protection Properties of 100% Cotton Knitted Fabrics

This paper investigated the influence of water repellent treatment on the UV protection properties of 100% cotton knitted fabrics. In vitro UV measurement was conducted according to international standard with a spectrophotometer and the results revealed that water repellent treatment could improve the UV protection properties of cotton knitted fabric. [5]

Reference

[1] Okur, A., Nasibov, E.N., Kiliç, M. and Yavuz, M., 2009. Using OWA aggregation technique in QFD: a case study in education in a textile engineering department. Quality & Quantity, 43(6), pp.999-1009.

[2] Grünert, T., Irnich, S., Zimmermann, H.J., Schneider, M. and Wulfhorst, B., 2002. Finding all k-cliques in k-partite graphs, an application in textile engineering. Computers & operations research, 29(1), pp.13-31.

[3] Wu, G.C., Zhao, L. and He, J.H., 2009. Differential-difference model for textile engineering. Chaos, Solitons & Fractals, 42(1), pp.352-354.

[4] U. Obidiegwu, M., C. Uzoma, P., O. Ezeh, V., C. Nwanonenyi, S., Usifoh, I. and U. Moneke, U. (2016) “Structural Characterization of Sandbox Seed Oil-Modified Alkyd Resin”, International Research Journal of Pure and Applied Chemistry, 12(3), pp. 1-8. doi: 10.9734/IRJPAC/2016/28997.

[5] Kan, C. W. and Lam, Y. L. (2014) “Influence of Water Repellent Treatment on the UV Protection Properties of 100% Cotton Knitted Fabrics”, Journal of Scientific Research and Reports, 4(6), pp. 543-545. doi: 10.9734/JSRR/2015/14302.

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