Preparation method and applications of calcium carbonate/titanium dioxide composite material
A technology of titanium dioxide and composite materials, which is applied in the field of preparation of calcium carbonate/titanium dioxide composite materials, which can solve problems such as easy agglomeration and difficulty in uniform dispersion of polyethylene materials, and achieve the effects of increased tensile strength, low processing cost, and increased sterilization rate
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Embodiment 1
[0048] The present embodiment provides a kind of preparation method of calcium carbonate / titanium dioxide composite material, and described preparation method comprises the following steps:
[0049] Step a, digest calcium oxide with water at 60°C, age at 80°C for 24 hours after the reaction to obtain digested pulp, adjust the concentration of digested pulp to obtain Ca(OH) with a mass concentration of 12% 2 Lotion;
[0050] Step b, Ca(OH) 2 The emulsion was added to the reactor, the temperature was raised to 35°C, and CO was introduced under the stirring condition of 500rpm. 2 Gas undergoes carbonization reaction, CO 2 The gas flow rate is 16L / h·LCa(OH) 2 Emulsion, when the pH value of the reaction system is 7, add titanium dioxide to the reactor, the amount of titanium dioxide added is 35% of the quality of calcium oxide, continue to feed CO 2 Gases, TiO2 and CO 2 The gas enters the reactor through the vent hole at the bottom of the reactor at the same time. When the pH ...
Embodiment 2
[0053] The present embodiment provides a kind of preparation method of calcium carbonate / titanium dioxide composite material, and described preparation method comprises the following steps:
[0054] Step a, digest calcium oxide with water at 55°C, age at 75°C for 26 hours after the reaction to obtain digested pulp, adjust the concentration of digested pulp to obtain Ca(OH) with a mass concentration of 10% 2 Lotion;
[0055] Step b, Ca(OH) 2 The emulsion was added to the reactor, the temperature was raised to 34°C, and CO was introduced under the stirring condition of 300rpm. 2 Gas undergoes carbonization reaction, CO 2 The gas flow rate is 18L / h·LCa(OH) 2 Emulsion, when the pH value of the reaction system is 7.2, add titanium dioxide to the reactor, the amount of titanium dioxide added is 55% of the quality of calcium oxide, continue to feed CO 2 Gases, TiO2 and CO 2 The gas enters the reactor through the vent hole at the bottom of the reactor at the same time. When the p...
Embodiment 3
[0058] The present embodiment provides a kind of preparation method of calcium carbonate / titanium dioxide composite material, and described preparation method comprises the following steps:
[0059] Step a, digest calcium oxide with water at 65°C, age at 85°C for 22 hours after the reaction to obtain digested pulp, adjust the concentration of digested pulp to obtain Ca(OH) with a mass concentration of 11% 2 Lotion;
[0060] Step b, Ca(OH) 2 The emulsion was added to the reactor, the temperature was raised to 36°C, and CO was introduced under the stirring condition of 400rpm. 2 Gas undergoes carbonization reaction, CO 2 The gas flow rate is 20L / h·LCa(OH) 2 Emulsion, when the pH value of the reaction system is 6.8, add titanium dioxide to the reactor, the addition of titanium dioxide is 28% of the quality of calcium oxide, continue to feed CO 2 Gases, TiO2 and CO 2 The gas enters the reactor through the vent hole at the bottom of the reactor at the same time. When the pH va...
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Abstract
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