Crop straw-polyurethane foam composite material and method for preparing same
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A polyurethane foam and crop straw technology, which is applied in the field of foam composite materials and its preparation, can solve the problems of polyurethane foam resource shortage and low utilization rate of straw, and achieve good cushioning, environmental protection, and wide application fields
Inactive Publication Date: 2008-08-27
NORTHEAST FORESTRY UNIVERSITY
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[0004] The purpose of the present invention is to provide a crop straw-polyurethane foam composite material and a preparation method thereof in order to solve the problems of resource shortage and low straw utilization rate in the existing preparation of polyurethane foam
Method used
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specific Embodiment approach 1
[0010] Embodiment 1: The crop straw-polyurethane foam composite material of the present invention mainly consists of 50-100 parts of crop straw, 5-40 parts of polyisocyanate or isocyanate prepolymer, 0.04-0.8 part of water, 0.03-0.4 part of hair It is made of foam catalyst, 0.05-0.6 parts of foam stabilizer and 0.01-8 parts of blowing agent.
specific Embodiment approach 2
[0011] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the crop straw-polyurethane foam composite material also includes 0.01 to 14.5 parts of polyether polyol by weight, and polyether polyol is polyoxyethylene glycol, poly Ethylene oxide triol, polyoxypropylene diol, polyoxypropylene triol, polytetrahydrofuran diol, polytetrahydrofuran triol, ethylene oxide-propylene oxide copolyethylene glycol, ethylene oxide-propylene oxide copolyethylene triol, tetrahydrofuran-propylene oxide copolymer diol or tetrahydrofuran-propylene oxide copolytriol. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the crop stalks are rice straw, wheat straw, corn stalk, sorghum stalk, soybean stalk, mung bean stalk, broad bean stalk, pea stalk, sweet potato vine, potato vine , sweet potato vine, peanut stalk, rape stalk, sesame stalk, flax stalk, kenaf stalk, jute stalk, hemp stalk, flax stalk, cotton stalk, sugarcane stalk, tobacco stalk and melon fruit stalk or some of them combination. Others are the same as in the first embodiment.
[0013] In this embodiment, when the crop straw is a composition, various compositions are combined in any ratio.
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Abstract
Crop straw-polyurethane foam composite material and a preparation process thereof relate to foam composite material and the preparation process. The invention solves the problems existing in the current polyurethane foam of lacking resource and low straw utilization. The invention is mainly prepared by crop straw, polyisocyanate or isocyanate prepolymer, water, foam kicker, foam stabilizer and foaming agent. The preparation process of the invention comprises abutting and sealing mould which is used to place crushed straw aggregates with a foaming box which is added with the mixture which is prepared by agitating polyisocyanate or isocyanate prepolymer, water, foam kicker, foam stabilizer and foaming agent, conducting foaming reaction for 1-30min, filling all gaps in crushed aggregates of crop straw with polyurethane foam by means of foaming expansion force, adhering crushed aggregates together, and placing for 1-24h under constant temperature. The invention makes the crop straw be fully used. The composite material has excellent buffering capacity, strength, heat insulation and sensitivity to notching, and can protect environment.
Description
technical field [0001] The invention relates to a foam composite material and a preparation method thereof. Background technique [0002] Foam is an indispensable material in people's production and life, involving all aspects of people's production and life and the development of science and technology. However, the production of synthetic foam materials depends on limited and non-renewable petroleum resources. With the increasing consumption of petroleum resources, synthetic polymer materials will gradually have a resource crisis. For this reason, for the sustainable development of human beings, the situation of petroleum resources forces people to constantly search for and apply new and renewable alternative materials. [0003] As an important class of biomass-based materials, crop straw has the characteristics of abundant yield, renewable, biodegradable, and environment-friendly. It is an important resource to replace or partially replace synthetic polymer materials tha...
Claims
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Application Information
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