Method for modifying superfine fiber synthetic leather based on amino-terminated hyperbranched polymer
A technology of amino-terminated hyperbranched and ultra-fine fibers, which can be used in fiber treatment, textiles and papermaking, etc., can solve the problems of organic solvent pollution and immaturity of synthetic leather, and achieve significant improvement in dyeing performance, increase in binding capacity, and good The effect of applying the foreground
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[0020] Example one
[0021] Step 1: Synthesis of amino-terminated hyperbranched polymer, the specific steps are as follows:
[0022] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a weight ratio of 1:1.5 into water 8 times the weight of N,N-methylenebisacrylamide at 70°C After reacting for 48h, then transfer it to a rotary evaporator, remove excess water at 70℃ for about 1h, wash with 200mL acetone to remove unreacted monomer, and dry it in a blast drying oven at 70℃ for 6h, A yellow-brown liquid amino-terminated hyperbranched polymer product is obtained;
[0023] Step 2: Use a crosslinking agent that can simultaneously crosslink with amino and carboxyl groups to introduce amino-terminated hyperbranched polymers into the base fabric to increase the content of amino groups in hydrophilic groups. The specific steps are as follows:
[0024] The base fabric is hydrolyzed with formic acid, and then the organic phosphine tanning agent of 1% to 10% of the base fabri...
Example Embodiment
[0029] Example two
[0030] Step 1: Synthesis of amino-terminated hyperbranched polymer, the specific steps are as follows:
[0031] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a weight ratio of 1:1 into water with 6 times the weight of N,N-methylenebisacrylamide at 80°C After reacting for 24h, then transfer it to a rotary evaporator, remove excess water at 80℃ for about 40min, wash with 200mL acetone to remove unreacted monomer, and dry it in a blast drying oven at 80℃ for 4h, A yellow-brown liquid amino-terminated hyperbranched polymer product is obtained;
[0032] Step 2: Use a crosslinking agent that can simultaneously crosslink with amino and carboxyl groups to introduce amino-terminated hyperbranched polymers into the base fabric to increase the content of amino groups in hydrophilic groups. The specific steps are as follows:
[0033] Now the base fabric is subjected to formic acid hydrolysis treatment, and then add a modified glutaraldehyde tanning ...
Example Embodiment
[0038] Example three
[0039] A method for modifying ultrafine fiber synthetic leather based on amino-terminated hyperbranched polymers, including the following steps:
[0040] Step 1: Synthesis of amino-terminated hyperbranched polymer, the specific steps are as follows:
[0041] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a weight ratio of 1:0.9 into water 4 times the weight of N,N-methylenebisacrylamide at 60°C After reacting for 24h, then transfer it to a rotary evaporator, remove excess water at 60℃ for about 1h, wash with 200mL acetone to remove unreacted monomer, and dry it in a blast drying oven at 60℃ for 4h, A yellow-brown liquid amino-terminated hyperbranched polymer product is obtained;
[0042] Step 2: Use a crosslinking agent that can simultaneously crosslink with amino and carboxyl groups to introduce amino-terminated hyperbranched polymers into the base fabric to increase the content of amino groups in hydrophilic groups. The specific steps...
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