Preparation method of agricultural waste fiber-based high-strength degradable barrier membrane
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A technology of agricultural waste and agricultural waste, which is applied in the field of high-strength degradable barrier films to achieve the effect of strengthening mechanical properties
Inactive Publication Date: 2019-05-03
HUNAN UNIV OF TECH
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However, there is still no suitable method to prepare membrane materials w
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[0030] Example 1
[0031] A method for preparing a high-strength degradable barrier film based on agricultural waste fiber, which is characterized in that it comprises a process A of preparing a pretreatment liquid A using agricultural waste fibers, and a preparation of the pretreatment liquid B using carboxymethyl chitosan and sodium alginate Process B, process C of preparing a membrane by mixing pretreatment liquid A and pretreatment liquid B.
[0032] Further, the process A includes:
[0033] (1) Agricultural waste fiber is used after cleaning;
[0034] (2) The crusher crushes to 300-600 mesh;
[0035] (3) After fully drying, use steam flash explosion 5 times to obtain recycled fiber raw materials;
[0036] (4) Put the recycled fiber raw materials into a 15wt% sulfuric acid and oxalic acid mixed acid solution, soak at 80°C for 4 hours, where the ratio of sulfuric acid to oxalic acid is 1:5;
[0037] (5) After the treated recycled fiber material is mechanically dehydrated and washed wi...
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[0052] Example 2
[0053] A method for preparing a high-strength degradable barrier film based on agricultural waste fiber, which is characterized in that it comprises a process A of preparing a pretreatment liquid A using agricultural waste fibers, and a preparation of the pretreatment liquid B using carboxymethyl chitosan and sodium alginate Process B, process C of preparing a membrane by mixing pretreatment liquid A and pretreatment liquid B.
[0054] Further, the process A includes:
[0055] (1) Agricultural waste fiber is used after cleaning;
[0056] (2) The crusher crushes to 300-600 mesh;
[0057] (3) After fully drying, use steam flash explosion 5 times to obtain recycled fiber raw materials;
[0058] (4) Put the recycled fiber material into a mixed acid solution of sulfuric acid and oxalic acid with a concentration of 18wt%, soak it at 80°C for 4 hours, where the ratio of sulfuric acid to oxalic acid is 1:5;
[0059] (5) The processed recycled fiber material is mechanically deh...
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Abstract
The invention relates to a preparation method of an agricultural waste fiber-based high-strength degradable barrier membrane. The process comprises the following steps: preparing a uniform dissolvingsolution pretreatment liquid A by adopting agricultural waste fibers, preparing a pretreatment liquid B by adopting carboxymethyl chitosan, sodium alginate and the like, mixing the pretreatment liquidA and the pretreatment liquid B, and carrying out casting to obtain the final membrane. The degradable membrane has excellent mechanical properties and full degradability, has an excellent barrier property in a biomass membrane, and can be applied to the field of packaging.
Description
technical field [0001] The invention relates to the technical field of degradable films, in particular to a high-strength degradable barrier film prepared from agricultural waste fibers as the main raw material. Background technique [0002] Although plastic materials have excellent performance and can achieve different functions through structural design, plastic materials cannot be degraded and come from non-renewable resources. Therefore, finding degradable materials as substitutes is an urgent technical issue that needs to be developed. Especially for the field of non-high-strength materials, the possibility of its realization is relatively high. For example, among the degradable materials developed in the past 20 years, typical degradable materials are starch, polylactic acid and fibers. Each biodegradable material has its own characteristics. For example, the source of starch is the most extensive and the cheapest, and it can be used in many fields, such as materia...
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