Lignin-epoxy resin composite material and preparation method thereof
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A technology of epoxy resin and composite material, which is applied in the field of lignin-polymer composite material and its preparation, can solve the problem of low effective utilization rate of lignin, achieve high stiffness and degradable performance, easy processing, excellent heat resistance Effect
Inactive Publication Date: 2012-07-18
NORTHEAST FORESTRY UNIVERSITY
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[0004] The present invention will solve the problem of low effective utilization rate of existing lignin
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specific Embodiment approach 1
[0012] Specific embodiment one: a kind of lignin-epoxy resin composite material of the present embodiment is made of 100 parts of epoxy resin, 100-400 parts of lignin, 60-120 parts of curing agent, 0-40 parts of reinforcing agent and 0-20 parts of toughening agent.
[0013] In this embodiment, lignin is used as the base material, and composite materials are formed by blending with epoxy resin. easy. The advantages of different materials are complemented by compound modification, and the different properties of the composite material are obtained by adjusting the content of each component, so that it has excellent heat resistance, UV resistance, high strength, high stiffness and degradable performance, etc. Can be widely used in various fields of daily life.
specific Embodiment approach 2
[0014] Embodiment 2: This embodiment is different from Embodiment 1 in that: the lignin is industrial lignin, high-purity lignin, alkali lignin or high-boiling alcohol lignin. Others are the same as in the first embodiment.
[0015] The industrial lignin, alkali lignin, high-purity lignin and high-boiling alcohol lignin of this embodiment are all commercially available products.
specific Embodiment approach 3
[0016] Specific embodiment three: this embodiment is different from specific embodiments one to two in that: the epoxy resin is bisphenol A type epoxy resin, brominated bisphenol A type epoxy resin, amino tetraglycidyl epoxy resin , p-aminophenol triglycidyl epoxy resin or novolac epoxy resin. Others are the same as the specific embodiment 1 to 2.
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Abstract
The invention discloses a lignin-epoxy resin composite material and a preparation method thereof, relates to a lignin-polymer composite material and a preparation method thereof, and aims to solve the conventional problem of low effective utilization rate of lignin. The lignin-epoxy resin composite material uses the lignin as a substrate; epoxy resin, a curing agent, a toughening agent, and the like are evenly blended with the lignin; and through the processes of pre-pressing, hot-pressing and curing molding, the lignin-based composite material is obtained. The lignin-epoxy resin composite material disclosed by the invention has the advantages of little water absorption, good mechanical performance, degradability, and the like, is suitable for manufacturing floor boards, wall protection boards, construction formworks, door-window profiles, fences, guardrails, louvers, roof boards, and the like in the construction industry, can be used for manufacturing inner decorative boards of automobile doors, seat backing boards, automobile roof lining, and the like in the automobile industry, and can also be used in the fields of the packaging and transportation industry, the furniture industry, office articles, sports facilities, and the like.
Description
technical field [0001] The invention relates to a lignin-polymer composite material and a preparation method thereof. Background technique [0002] Lignin is the second largest renewable resource next to cellulose in nature, with an annual cost of 5×10 10 It can be regenerated at a speed of t and is an organic raw material with great industrial value. In cellulose-related industries (such as plant hydrolysis and pulp and paper industry), lignin is usually produced in large quantities as a by-product, but so far, more than 95% of the recovery of isolated lignin is concentrated and then burned On the one hand, it causes a great waste of resources, on the other hand, the discharge of lignin-containing industrial wastewater will also cause serious adverse effects on the environment. Effective utilization of lignin is of positive significance to environmental protection and economic development. [0003] Blending lignin with polymers to prepare new composite materials is one o...
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