Structure-property relation in varieties of silk fibers

Abstract

Crystallite shape ellipsoid in different varieties of silk fibers namely (i) Chinese (ii) Indian, and (iii) Japanese, has been computed using wide‐angle X‐ray data and Hosemann's one‐dimensional paracrystalline model. The estimated microcrystalline parameters are correlated with the observed physical property of the silk fibers. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1979–1985, 2001

Dye removal from colored‐textile wastewater using chitosan‐PPI dendrimer hybrid as a biopolymer: Optimization, kinetic, and isotherm studies

“…The results on dye adsorption at these temperatures would increase the mobility of the large dye ion and also produces a swelling effect within the internal structure of the chitosan, thus enabling the large dye molecule to penetrate further 49, 50. The temperature affects the adsorption rate by altering the molecular interactions and the solubility 18. The higher removal owing to rising temperature can be attributed to chemical reaction taking place among the functional groups of the adsorbate/adsorbent and the dye (Figure 7).…”

“…The higher removal owing to rising temperature can be attributed to chemical reaction taking place among the functional groups of the adsorbate/adsorbent and the dye (Figure 7). 18, 51…”

“…55–57 The Langmuir equation can be written as follows [Eq. (7)]18, 53, 57: where, q e , C e , K L , and Q 0 are the amount of dye adsorbed on CS‐PPI at equilibrium (mg/g), the equilibrium concentration of dye solution (mg/L), Langmuir constant (L/g) and the maximum adsorption capacity (mg/g), respectively. The linear form of Langmuir equation is indicated by [Eq.…”

“…It has considerable advantages in comparison to conventional methods, particularly from the technical, economic, and environmental point of views 14–17. Many adsorbents have been experienced on the possibility to eliminate dye from textile effluents 18. For obtaining high‐performance adsorbent, it is crucial to select the more efficient and cheaper adsorbents by higher adsorption ability.…”

“…Chitosan is a natural cationic polysaccharide easily produced from the shells of crabs, shrimps, and prawns. Due to being nontoxic, antibacterial, and biodegradable, the chitosan and its derivatives have attracted more and more attention 18. Chitosan has a very high affinity for the majority of dye groups such as reactive, direct, and disperse, showing a lack of affinity only for basic dyes 19–24.…”