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분무 건조에 의해 생성된 원료 입자로부터 유리 중공구체의 제조에 관한 연구
A Study on the Fabrication of Hollow Glass Sphere Using Precursor Particles Prepared by Spray Drying Method
한양대학교 공학대학 화학공학과, 안산 425-791
Dept. of Chemical Engineering, Hanyang University, Ansan 425-791, Korea
HWAHAK KONGHAK, August 2000, 38(4), 497-502(6), NONE
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Abstract
고분자 화합물의 첨가제로서 개질제, 물성향상제, 충진제, 강화제 등의 용도로 사용되고 있는 유리 중공구체(Hollow Glass Sphere; HGS)를 분무 건조에 의해 제조된 원료 입자를 사용, 로에 투입함으로써 제조하였다. 원료 입자를 제조하기 위해서 본 실험에서 사용한 분무 건조기의 운전 조건은 시료의 투입 유량이 700 ml/h, 분무 압력이 100kPa, 입구 온도는 200-250℃, 그리고 출구 온도는 100℃이었다. 또한 유리 중공구체 내에 첨가될 boric acid의 변화량에 따른 물성 변화를 조사하기 위해 boric acid의 조성을 0, 10, 20 g으로 증가하여 실험하였으며, 그 결과 조성비가 증가할수록 화학적 내구성(내수성, 내산성, 내알칼리성) 및 파쇄 강도는 증가하였고, 유리 중공구체의 평균 입경은 증가한 후 일정량 이상(20 g)에서 감소하는 결과를 보여 주었다.
Hollow glass spheres were prepared by using spray dryer and gas flame furnace. To fabricate the precursor particles for preparing HGS, spray dryer method was used. Operating conditions of the spray dryer for precursor particles were sample flow rate 700 ml/h, spray air pressure 100 kPa, outlet temperature 100℃ and inlet temperature 200-250℃. Also we checked the properties of the HGS according to the weight of boric acid. As a results. we found that the chemical durability and crush strength increased with increasing the weight of boric acid. The results also showed that the particle size of the HGS increased until the weight of the boric acid reached to 20 g.
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Lee KH, Kim H, HWAHAK KONGHAK, 36(5), 701 (1998)
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Weyl WA, Centr. Glassceram. Res. Inst. Bull., 22, 511 (1975)
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Newton RG, Glass Tech., 26, 21 (1985)
Bunker BC, J. Non-Cryst. Solids, 87, 226 (1986)
