Preparation method of high-strength sisal fiber reinforced tapioca starch composite material
A technology of tapioca starch and sisal fiber, which is applied in fiber raw material treatment, cellulose treatment with microorganisms/enzymes, papermaking, etc., can solve the problems of poor water resistance, easy adhesion, unstable product size, etc., and achieves low cost, increased production Effects of hydrophilic properties, improved stability and mechanical properties
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Embodiment 1
[0029] A kind of preparation method of high strength sisal fiber reinforced tapioca composite material, comprises the following steps:
[0030] Step 1. After pulverizing the raw sisal hemp into short fibers, soak the short fibers in a 0.3% cellulose protective agent aqueous solution for 30 minutes, and then filter to obtain filtrate 1 and filter residue 1; filter residue 1 is not processed with water or solvent. Rinse, cellulose protector remains on top. Make the cellulose protective agent continue to protect the cellulose during freezing. In this way, there is no need to freeze the filtrate, which saves electric energy.
[0031] Step 2, freeze the filter residue 1 at -17°C for 1 hour, then thaw at room temperature, repeat freezing and thawing 3 times, through multiple freezing and thawing at room temperature, the cell wall of sisal hemp can be destroyed, due to freezing, on the one hand, it can make The hydrophobic bond structure of the cell membrane is broken, thereby incr...
Embodiment 2
[0043] A kind of preparation method of high strength sisal fiber reinforced tapioca composite material, comprises the following steps:
[0044] Step 1. After crushing raw sisal hemp into short fibers, soak the short fibers in a 0.8% aqueous solution of cellulose protective agent by mass fraction for 40 minutes, and then filter to obtain filtrate 1 and filter residue 1;
[0045] Step 2. Freeze the filter residue 1 at -17°C for 1.5h, then thaw at room temperature, repeat the freezing and thawing 4 times, put it in the filtrate 1, adjust the pH value of the filtrate 1 to 4, and after the temperature is 47°C, Add the pectinase of 1g / L again, soak after 1.5h, be down to room temperature, add the oxidizing agent that quality is filtrate-mass 1.5%, the tensio-active agent of 0.7%, the catalyzer of 0.17% and the chelating agent of 0.7% afterwards, and Adjust the pH value of the filtrate 1 to 8, and after incubating at a temperature of 70° C. for 1.5 hours, perform centrifugation to ob...
Embodiment 3
[0056] A kind of preparation method of high strength sisal fiber reinforced tapioca composite material, comprises the following steps:
[0057] Step 1, after crushing raw sisal hemp into short fibers, soaking the short fibers in an aqueous solution of cellulose protective agent with a mass fraction of 1% for 50 minutes, and then filtering to obtain filtrate 1 and filter residue 1;
[0058] Step 2. Freeze the filter residue 1 at -16°C for 2 hours, then thaw at room temperature, repeat freezing and thawing 5 times, put it in the filtrate 1, adjust the pH value of the filtrate 1 to 5, and after the temperature is 50°C, then Add the pectinase of 1.2g / L, after soaking 2h, be down to room temperature, add the oxidizing agent that quality is filtrate-mass 2%, the tensio-active agent of 1%, the catalyzer of 0.2% and the chelating agent of 1% afterwards, and adjust Filtrate 1 has a pH value of 7, and after being incubated at 30° C. for 2 hours, centrifuged to obtain solid and liquid su...
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