A new type of phenolic lignin-based network polymer with the structure-variable function composed of 1,1-diarylpropane units

Development of lignin as a transparent resin: evaluation of thermal and optical properties of alkoxylated lignophenols

“…LP was obtained from Japanese cedar (Cryptomeria japonica)-based lignin soaked in p-cresol by means of the phase-separation system (twostep process II) according to the previous report (M n ¼2400, M w /M n ¼3.24, eluent: tetrahydrofuran, polystyrene standards). 4 Poly(bisphenol A-carbonate) (PC, M w ¼64000) was obtained from Aldrich (St Louis, MO, USA).…”

“…However, we succeeded in developing a phase-separation system (two-step process II) that can produce processable lignophenol (LP) (Figure 1). [4][5][6] The structure of LP is similar to that of artificial phenolic resins [7][8][9][10] commonly used as plastics; therefore, LP is considered as a natural-polymer-based plastic and an alternative to petroleum-based commodity polymers. It may thus be possible to reduce fossil fuel consumption by producing novel LP-based materials.…”

Tenacious Epoxy Adhesives Prepared from Lignin-derived Stable Metabolic Intermediate

“…The utilization of waste biomass is important for the energy and material innovation from nonrenewable resources to natural and renewable resources [1][2][3][4][5][6][7][8][9][10][11][12][13]. Although lignin is the typical waste biomass, its chemical application has been limited [4] because of difficulties in transforming its highly networked structure.…”

Conversion and Separation Pattern of Lignocellulosic Carbohydrates through the Phase-separation System

“…The separated lignin derivatives (lignophenol) have several unique functions, which conventional lignins do not have, in spite of retention of the original interunit linkages: these include highly phenolic property, no conjugated system, light color comparable with native lignin, solid-liquid transformation and high immobilization capability for proteins (enzyme). 11,12 Furthermore, the molecular structures of lignophenol can be secondarily controlled using a nucleophilic attack of phenolic units to adjacent carbons, resulting in a change of the important functionalities such as phenolic activity and molecular weight. These original functions are due to the selective hybridization of monomeric phenol derivatives at C-1 positions, leading to liner type structures composed mainly of 1,1-bis(aryl)propane-type units.…”

“…The conversion and separation pattern of lignin component was reported in previous papers. [10][11][12] …”