A fully biodegradable straw straw and preparation method thereof
An all-biological, straw-based technology, applied in the field of all-biodegradable straw straws and its preparation, can solve the problems of complex preparation process, non-degradable straws, incomplete degradation, etc., and achieve the effects of simple preparation process, safe use, and avoiding waste
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Embodiment 1
[0028] The preparation method of the fully biodegradable straw straw of this embodiment includes:
[0029] (1) Straw pretreatment
[0030] The harvested stalks are air-dried, and after drying, the stalks are removed and the tubular parts are left. The obtained straw tubes were subjected to lignin removal and bleaching, and the straw tubes were soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite at a molar ratio of 1.5:1 until the straw tubes turned white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 105°C to constant weight.
[0031] (2) Preparation of straw tubes
[0032] Soak the pretreated straw tubes in a cellulose solution with a concentration of 5wt% for 1 hour, then take them out and condense them in the air for 3.5 hours to form cellulose colloids on the surface of the straw tubes, then place the straw tubes in distilled water for 4 days to exchange solvent, and the straw straws were obtained ...
Embodiment 2
[0036] The preparation method of the fully biodegradable straw straw of this embodiment includes:
[0037] (1) Straw pretreatment
[0038] The harvested stalks are air-dried, and after drying, the stalks are removed and the tubular parts are left. The obtained straw tubes were subjected to lignin removal and bleaching, and the straw tubes were soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite at a molar ratio of 1.2:1 until the straw tubes turned white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 90°C to constant weight.
[0039] (2) Preparation of straw tubes
[0040] Soak the pretreated straw tubes in a cellulose solution with a concentration of 1wt% for 0.5h, then take them out and condense them in the air for 2.5h to form cellulose colloid on the surface of the straw tubes, then place the straw tubes in distilled water for 2 days The solvent was exchanged, and straw straws were obtained after n...
Embodiment 3
[0044] The preparation method of the fully biodegradable straw straw of this embodiment includes:
[0045](1) Straw pretreatment
[0046] The harvested stalks are air-dried, and after drying, the stalks are removed and the tubular parts are left. The obtained straw tubes were subjected to lignin removal and bleaching, and the straw tubes were soaked in a mixed aqueous solution of glacial acetic acid and sodium chlorite at a molar ratio of 1.4:1 until the straw tubes turned white. Then wash with distilled water until the filtrate is neutral, and then dry the straw tube at 100°C to constant weight.
[0047] (2) Preparation of straw tubes
[0048] Soak the pretreated straw tubes in a cellulose solution with a concentration of 3wt% for 45 minutes, then take them out and condense in the air for 3 hours to form cellulose colloid on the surface of the straw tubes, then place the straw tubes in distilled water for 3 days to exchange the solvent , to obtain straw straws after natura...
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Abstract
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