Abstract:
The present invention relates to lignin-containing compositions comprising: 0 to 50 percent by weight of lignin; 0 to 50 percent by weight of a liquid C2-C4polyol; and 10 to 50 percent by weight of an acrylic resin; wherein the percentages by weight are expressed relative to the total dry weight of the composition, and wherein the total dry weight of the composition amounts to 100 percent. The present invention further relates to processes for sealing joints or coating surfaces using such a composition. Moreover, the present invention relates to joints sealed and surfaces coated using such a composition, as well as vehicles comprising such sealed joints and coated surfaces.
Abstract:
Cellulose containing hybrid aerogels and hybrid xerogels, having excellent adsorption properties and sufficient mechanical stability for carrying the adsorbed matter, are provided. These hybrid aerogels and xerogels are prepared by a process comprising dissolving cellulose pulp in an aqueous sodium hydroxide solution and adding a chargeable carbohydrate, gelation of the solution comprising the dissolved matter, regeneration and drying.
Abstract:
The present disclosure relates to a method for the production of precursor fiber for the production of carbon fiber, comprising the steps: a) providing a spinning dope comprising a lignin and a gelling hydrocolloid dispersed in aqueous alkaline solution (s201); b) extruding the spinning dope through a spinning nozzle to provide an initial fiber (s203); and c) passing the initial fiber through a first coagulation liquid to provide the precursor fiber (s205); wherein the first coagulation liquid is arranged to effect gelling of the gelling hydrocolloid by regulation of pH and/or ionicity. The disclosure further relates to precursor fibers and carbon fibers produced by the method above.
Abstract:
A method for producing an electrode active coating on a current collector comprising providing isolated lignin and subjecting the isolated lignin to a pre-treatment in order to remove low molecular mass fractionsof the lignin. The pre-treated lignin is mixed with an electrode active material, water and a conductive additive material so as obtain a slurry adapted for coating of a current collector. The coating obtained by the method comprises pre-treated lignin as a binder. The coating obtained has good binding properties between the particles of the coating as well as to the current collector. Furthermore, it has excellent electrochemical properties during use in a lithium-ion battery.
Abstract:
The present disclosure relates to a method for the production of precursor fiber for the production of carbon fiber, comprising the steps: a) a) forming a spinning dope comprising a dissolving pulp, a lignin and an alkali metal hydroxide dissolved in water (s201);5 b) extruding the spinning dope through a spinning nozzle to provide a fibrous extrudate (s203); and c) passing the fibrous extrudate through a coagulation liquid to provide the precursor fiber (s205); wherein the coagulation liquid is arranged to effect precipitation of the precursor fiber by regulation of pH and/or ionicity. The disclosure further relates to precursor fibers and carbon fibers produced by the method above, as well as spinning dopes used in the method.
Abstract:
The present invention relates to lignin-containing compositions comprising: 10 to 50 percent by weight of lignin; 10 to 50 percent by weight of a polyethylene glycol; 10 to 50 percent by weight of an acrylic resin; and 1 to 50 percent by weight of an inorganic filler; wherein the percentages by weight are expressed relative to the total dry weight of the composition, and wherein the total dry weight of the composition amounts to 100 percent. The present invention further relates to processes for sealing joints or coating surfaces using such a composition. Moreover, the present invention relates to joints sealed and surfaces coated using such a composition, as well as vehicles comprising such sealed joints and coated surfaces.
Abstract:
The present invention relates to a method of producing lignin with reduced amount of odorous substances comprising the steps of: i) dissolving isolated lignin into an alkali solution; ii)adding to the solution C 1 -C 4 -alcohol in an amount of less than 30% by weight, based on the dry weight of the isolated lignin;and iii) re-precipitating lignin by acidifying the solution. The invention also relates to a lignin product with reduced odor obtained and/or obtainable by the method and to the use of the obtained lignin as a component in polymer blends, an additive or filler in building materials, as binding agent in adhesives, and/or for the production of a carbon fiber, especially in indoor applications.