Next Article in Journal / Special Issue
Morphology Formation in PC/ABS Blends during Thermal Processing and the Effect of the Viscosity Ratio of Blend Partners
Previous Article in Journal
Finite Element Simulation for Analysing the Design and Testing of an Energy Absorption System
Previous Article in Special Issue
Surface Characterization of Polymer Blends by XPS and ToF-SIMS
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Materials 2016, 9(8), 657; doi:10.3390/ma9080657

Changes of Lignin Molecular Structures in a Modification of Kraft Lignin Using Acid Catalyst

1
Ore Co. Ltd., Seoul 04781, Korea
2
Hyosung, R&D Business Labs, Anyang 431-080, Korea
3
Department of Biosystems & Biomaterials Science and Engineering, Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Volker Altstädt
Received: 31 May 2016 / Revised: 27 July 2016 / Accepted: 2 August 2016 / Published: 5 August 2016
(This article belongs to the Special Issue Polymer Blends and Compatibilization)
View Full-Text   |   Download PDF [4634 KB, uploaded 5 August 2016]   |  

Abstract

The purpose of this study is to modify lignin for better blending with general purpose synthetic polymers. The possible advantages by using this modification would be cost reduction, better physical properties, and biodegradability. In this study, butyrolactone-modified lignin (BLL) and tetrahydrofuran-modified lignin (THFL) were used for aliphatic chain modification of lignin using an acid-catalyzed esterification method in order to mimic the relation of lignin-carbohydrate-complex (LCC) and cellulose. The results of several analyses indicated that lignin was well modified. It was confirmed that the lignin was modified as expected and the reaction sites of the modification, as well as the reaction behaviors, were varied by the reagent types. The result of X-ray diffraction analysis (XRD) analysis indicated that modified lignin/polymer blends increased the crystallinity due to their good compatibility. It can be confirmed that the type of alkyl chain and the miscibility gap between the alkyl chain-matrix affected the mechanical properties enormously in the fungi-degradable environment. From this study, a new method of lignin modification is proposed, and it is found that modified lignin retains the property of the substituted aliphatic chain well. This method could be a proper lignin modification method. View Full-Text
Keywords: soft wood kraft lignin; lignin-carbohydrate-complex (LCC); aliphatic chain modification; polymer blend; biodegradability; compatibility soft wood kraft lignin; lignin-carbohydrate-complex (LCC); aliphatic chain modification; polymer blend; biodegradability; compatibility
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Kim, S.; Oh, S.; Lee, J.; Roh, H.-G.; Park, J. Changes of Lignin Molecular Structures in a Modification of Kraft Lignin Using Acid Catalyst. Materials 2016, 9, 657.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top