Anti-infection medical glue material and preparation method thereof
An anti-infection and matrix material technology, which is applied in the field of anti-infection medical adhesive materials, can solve the problems of unsatisfactory strength performance, etc., and achieve the effect of long-term bond strength improvement and good anti-infection performance
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preparation example 1
[0025] The preparation of preparation example 1α-n-butyl cyanoacrylate
[0026] This preparation example is used for preparing required n-butyl cyanoacrylate, specifically comprises the following steps:
[0027] (1) Butyl ester transesterification reaction
[0028] CNCH 2 COOC 2 h 5 +C 4 h 9 OH—C 2 h 5 ONa→CNCH 2 COOC 4 h 9 +C 2 h 5 Oh
[0029] Put 1400ml of ethyl cyanoacetate and 1200ml of n-butanol into a 5L three-necked beaker equipped with a stirrer and a thermometer, turn on the stirring, condense water, add 25g of sodium ethoxide to 40°C and above; heat up to 100°C and the top temperature reaches 78 Start distilling ethanol at -82°C. When the internal temperature reaches 110°C and the top temperature reaches 98-100°C, stop heating and collect about 680ml of ethanol;
[0030] Cool down to an internal temperature of about 50°C, turn on the heating, change the bottle with the vacuum pump to receive n-butanol, the vacuum degree is -0.1MPa, and change the bottle...
preparation example 2
[0040] Preparation Example 2 The preparation of n-octyl cyanoacrylate
[0041] This preparation example is used for preparing required n-octyl cyanoacrylate, specifically comprises the following steps:
[0042] (1) with step (1) in the preparation example 1;
[0043] (2) with step (2) in the preparation example 1;
[0044] (3) Synthesis of n-octyl α-cyanoacrylate
[0045]
[0046]Add 380ml of methanol-formaldehyde solution and 0.95ml of piperidine into a 5L three-neck flask equipped with a stirrer, dropping funnel, condenser, and water separator. When the temperature in the bottle reaches 40°C or above, start adding cyanoacetic acid After adding 750ml of octyl esters dropwise, collect methanol until the internal temperature reaches 120°C; then add 300ml of petroleum ether dropwise, start dehydration, and speed up stirring. After the water is finished, collect about 300ml of petroleum ether; when the internal temperature reaches 130°C, add 20g of phosphorus pentoxide and ...
Embodiment 1
[0051] The preparation method of the anti-infection medical adhesive material described in this embodiment comprises the following steps:
[0052] (1) According to the mass ratio of 55wt%: 45wt%, take the above-mentioned n-butyl cyanoacrylate and n-octyl α-cyanoacrylate and fully mix to obtain the alkyl α-cyanoacrylate compound; and according to α- Alkyl cyanoacrylate compound: polylactic acid = 70wt%: 30wt% The ratio is fully mixed to obtain a medical gel matrix, which is set aside;
[0053] (2) Add the gum arabic airgel particles accounting for 20wt% of the mass of the medical gum matrix in the above-mentioned medical gum matrix, and the dandelion juice (directly squeeze the juice with dandelion) accounting for 25wt% of the quality of the medical gum matrix, fully stir and mix Homogenize to a gel state to obtain an anti-infection matrix material for subsequent use;
[0054] (3) above-mentioned base material is placed in the airtight container that choline chloride ionic liq...
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