文献类型：期刊文献

英文题名：Lignin valorization: lignin nanoparticles as high-value bio-additive for multifunctional nanocomposites

作者：Tian, Dong[1,2,3];Hu, Jinguang[2,3];Bao, Jie[2];Chandra, Richard P.[3];Saddler, Jack N.[3];Lu, Canhui[1]

机构：[1]Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Univ British Columbia, Dept Wood Sci, Forest Prod Biotechnol Bioenergy Grp, Fac Forestry, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada

年份：2017

卷号：10

期号：1

外文期刊名：BIOTECHNOLOGY FOR BIOFUELS

收录：;EI(收录号：20173204038025);WOS:【SCI-EXPANDED(收录号:WOS:000406231100001)】；

基金：This work was supported by Chinese Scholarship Council (Grant No. 201406240173); Natural Science Foundation of China (No. 51473100); State Key Laboratory of Polymer Materials Engineering (Grant No. sklpme2015-2-02), and Open Funding Project of the State Key Laboratory of Bioreactor Engineering.

语种：英文

外文关键词：Lignin nanoparticles; UV-shielding; Antioxidant; Polymer nanocomposite; Biorefinery

摘要：Background: Although conversion of low value but high-volume lignin by-product to its usable form is one of the determinant factors for building an economically feasible integrated lignocellulose biorefinery, it has been challenged by its structural complexity and inhomogeneity. We and others have shown that uniform lignin nanoparticles can be produced from a wide range of technical lignins, despite the varied lignocellulosic biomass and the pretreatment methods/conditions applied. This value-added nanostructure lignin enriched with multifunctional groups can be a promising versatile material platform for various downstream utilizations especially in the emerging nanocomposite fields. Results: Inspired by the story of successful production and application of nanocellulose biopolymer, two types of uniform lignin nanoparticles (LNPs) were prepared through self-assembling of deep eutectic solvent (DES) and ethanol-organosolv extracted technical lignins derived from a two-stage fractionation pretreatment approach, respectively. Both LPNs exhibited sphere morphology with unique core-shell nanostructure, where the DES-LNPs showed a more uniform particle size distribution. When incorporated into the traditional polymeric matrix such as poly(vinyl alcohol), these LPN products displayed great potential to formulate a transparent nanocomposite film with additional UV-shielding efficacy (reached similar to 80% at 400 nm with 4 wt% of LNPs) and antioxidant functionalities (reached similar to 160 mu m mol Trolox g(-1) with 4 wt% of LNPs). At the same time, the abundant phenolic hydroxyl groups on the shell of LNPs also provided good interfacial adhesion with PVA matrix through the formation of hydrogen bonding network, which further improved the mechanical and thermal performances of the fabricated LNPs/PVA nanocomposite films. Conclusions: Both LNPs are excellent candidates for producing multifunctional polymer nanocomposites using facile technical route. The prepared transparent and flexible LNPs/PVA composite films with high UV-shielding efficacy, antioxidant activity, and biocompatibility are promising in the advanced packaging field, which potentially provides an additional high-value lignin product stream to the lignocellulose biorefinery. This study could open the door for the production and application of novel LNPs in the nascent bioeconomy.