Читать книгу Handbook of Biomass Valorization for Industrial Applications - Группа авторов - Страница 45

The application of lignin in resin is an attached cross-linker in the typical epichlorohydrin reaction. Here lignin can report the bulk properties. For this mode of usage [84], lignin must be impurity-free. This can be accomplished by the purification of waste lignins derived from conventional pulp and paper processes or through the use of lignin. Many inventions and publications have been made based on developments in lignin–epoxy, but perhaps the newest is its use in PCB (Printed Circuit Boards).

Cazacu and Popa and Simionescu et al. have proved that epoxy embedded resins supported lignin can be manufactured in substantial amounts by relatively effortless purification methods. This includes epichlorohydrin reaction with lignin and succeeding reclamation and filtration of idle epichlorohydrin to clean the final resin.

Epoxy–lignin mixtures produced from various forms of lignin revealed that combines comprising lignin hardwood segregated by Kraft system or else extracted by steam explosion crosslinked high efficiently compared to those produced from lignin softwood [84]. The demand for epoxy resins is economically vibrant and one where lignin possibly will grow as a crosslinking agent, with particular regard to phenol–epoxy resins.

If the industry grows and tends to grow in the intermediate to long period, there will be different chances for lignin, particularly as its intrinsic characters, often expressed in the ending manufactured goods, are defined in greater aspects.