二酸化망간 轉移에 關한 硏究 (第1報)

姜泰範 상명대학교 논문집 1984 상명대학교논문집 Vol.13 No.-

When γ-MnO_2 and β-MnO_2 was heated, transition process and range of transition temperature was as follows; γ-MnO_2?? β-MnO_2?? Mn_2O_3?? Mn_3O_4, and β-MnO_2?? Mn_2O_3?? Mn_3O_4

PDMS-b-PMMA 공중합체 막의 제조 및 투과특성

강태범,조아라,이현경 한국막학회 2008 멤브레인 Vol.18 No.3

본 연구에서는 atom transfer radical polymerization (ATRP)에 의해 polydimethylsiloxane (PDMS)와 methyl-methacrylate (MMA)로부터 polydimethylsiloxane-polymethylmethacrylate (PDMS-PMMA) block copolymer를 합성하였다. 합성된 PDMS-b-PMMA copolymer막의 특성은 FT-IR, 1H NMR, GPC, DSC 등을 사용하여 조사하였다. 질소와 수소의 투과도는 각각 1.2~1.5 barrer와 6.2~10.5 barrer를 보였고, 질소에 대한 수소의 선택도는 5.3~6.9 범위였다. PDMS-b-PMMA copolymer 막의 투과도와 선택도는 PDMS 막보다는 낮은 값을 보였고, PMMA 막보다는 높은 결과를 보였다. In this research, polydimethylsiloxane-polymethylmethacrylate (PDMS-PMMA) block copolymer was synthesized from polydimethylsiloxane (PDMS) and methylmethacrylate (MMA) monomer using atom transfer radical polymerization (ATRP). The synthesis characterization of the PDMS-b-PMMA copolymer membrane was carried out by a FT-IR, 1H-NMR, GPC and DSC. The permeabilities of nitrogen and hydrogen gases were observed being 1.2~1.5 barrer and 6.2~10.5 barrer, respectively. Simultaneously, selectivities of hydrogen against nitrogen were 5.3~6.9. The permeability and selectivity of PDMS-b-PMMA copolymer membrane were showed lower than the PDMS membrane, but higher than the PMMA membrane.

돈도와(溫度) 조성의(組成) 함수로서(函數) 1-Propanol/Water 혼합용액의(混合溶液) 점도와(粘度) 밀도(密度)( 제 2보 )

강태범,이현경 상명대학교 자연과학연구소 1998 自然科學硏究 Vol.5 No.-

Viscosity and density of 10 binary mixtures of 1-propanol with water were measured at 278.2≤T/K≤338.2 and the results summarized using polynomials in temperature. The excess dynamic viscosity( E) was large and positive in all cases.

TEOS-$H_2O$계로부터 다공성 실리카 막의 제조 및 수소-질소 혼합기체의 분리

강태범,이현경,이용택 한국막학회 2000 멤브레인 Vol.10 No.2

다공성 실리카 막을 졸겔법에 의해서 Si(${OC}_2H_5)_4-H_2O$ 로부터 제조하고, 막의 특성을 TG-DTA, XRD, IR, BET, SEN, TEM을 사용하여 조사하였다. 다공성 실리카 막 제조를 위한 Si(${OC}_2H_5)_4$ : $H_2O4$ : $H_2O$ : $C_2H_5{OH}$의 최적 몰비는 1 : 4.5 : 4 이었다. 100$^{\circ}C$~1100$^{\circ}C$~에서 열처리된 막의 비표면적은 3.8 $m^2$/g~902.3$m^2$/g 이었으며, 기공크기는 20$\AA$~50$\AA$이었다. 300$^{\circ}C$~~700$^{\circ}C$~범위에서 열처리된 막의 입자크기는 15nm~30nm이며, 열처리 온도가 증가하면 입자의 크기도 증가하였다. 이렇게 제조한 다공성 실리카 막으로 $H_2$/$N_2$ 혼합기체를 분리하는데 응용하였으며, 다공성 실리카 막에 의한 $H_2$/$N_2$혼합기체분리는 Knudsen flow와 surface flow에 의해서 일어나며 주로 surface flow에 의존하였다. 다공성 실리카 막의 $H_2$/$N_2$ 혼합기체에 대한 real separation factor($\alpha$)는 155.15 cmHg($\Delta$P)와 $25^{\circ}C$에서 5.17이었으며, real separation factor($\alpha$), head separation factor ($\beta$), tail separation factor$\bar{B}$)는 압력이 증가하면 증가하였다. The porous silica membrane was prepared from Si(${OC}_2H_5)_4-H_2O$ system by sol-gel method. To investigate the characteristics of gels and porous silica membrane, we examined gels and porous silica membrane using TG-DTA, X-ray diffractometer, IR spectrophotometer, BET, SEM and TEM. The optimum mole ratio of Si(OC$_2$H$_{5}$)$_4$ : $H_2O$ $C_2$H$_{5}$OH for porous silica membrane was 1 : 4.5 : 4. The porous silica membrane was obtained by heat treatment of the gel above 700 $^{\circ}C$. The specific surface area of sintered gel was 3.8 $m^2$/g to 902.3 $m^2$/g at 100 $^{\circ}C$ to 1100 $^{\circ}C$ The pore size of sintered gel was in the range 20 $\AA$~ 50$\AA$. The particle size of sintered gel was 15 nm to 30 nm at 30$0^{\circ}C$ to 700$^{\circ}C$. The performance of the porous silica membrane was investigated for the separation of $H_2$/$N_2$ gas mixture. Gas separation through porous silica membrane depends upon Knudsen flow and surface flow. The veal separation factor($\alpha$) of $H_2$/$N_2$ was 5.17 at 155.15 cmHg and $25^{\circ}C$. The real separation factor($\alpha$), head separation factor($\beta$), and tail separation factor( $\bar{B}$) increased as the pressure of permeation cell Increased.sed.

다공성 실리카막에 의한 C_3H_6-N_2 혼합기체분리

강태범 상명대학교 자연과학연구소 2001 自然科學硏究 Vol.8 No.-

The porous silica glass was prepared from Si(OC_2H_5 )_4 -H_2O system by sol- gel method. The performance of the porous silica membrane was investigated for the separation C3H6/N2 gas mixture. The real separation factor (α) and ideal separat ion factor (α^* ) decreased as the pressure and t emperature increased.

PDMS-NaA zeolite 혼합기지분리막에 의한 수소-질소 분리

강태범,홍세령,Kang, Tae Beom,Hong, Se Ryeong 한국막학회 2015 멤브레인 Vol.25 No.3

PDMS에 NaA zeolite를 0~40 wt% 가하여 PDMS-NaA zeolite 막을 제조하였다. SEM 관찰에 의하면 PDMS-NaA zeolite 막 내에 분산되어있는 NaA zeolite 입자의 크기는 $2{\sim}5{\mu}m$이었다. PDMS-NaA zeolite 막의 $N_2$와 $H_2$ 투과도는 막 내의 NaA zeolite 함량이 증가하면 증가하였고, $N_2$보다는 $H_2$의 투과도가 더 컸다. 그리고 PDMS-NaA zeolite 선택성($H_2/N_2$)은 NaA zeolite 함량이 증가하면 증가하였다. PDMS-NaA zeolite membranes were prepared by adding 0~40 wt% NaA zeolite. Based on SEM observation, NaA zeolite was dispersed in the PDMS-NaA zeolite membranes with $2{\sim}5{\mu}m$. The permeabilities of $H_2$ and $N_2$ gases through PDMS-NaA zeolite membranes increased as NaA zeolite contents increased and $H_2$ gas had better permeabilities than $N_2$. The selectivity ($H_2/N_2$) of PDMS-NaA zeolite membranes increased as NaA zeolite contents increased.

SiO2-B2O3 막에 의한 수소/질소 혼합기체 분리

강태범,박진호 한국막학회 2004 멤브레인 Vol.14 No.4

졸겔법에 의해 Si(OC2H5/)4-(CH3O)3B-C2H5OH-H2O계로부터 다공성의 SiO2-B2O3 막을 제조하였다. SiO2-B2O3막의 특성을 BET, IR spectrophotometer, X-ray diffractometer, SEM 과 TEM을 사용하여 조사하였다. 700{℃에서 얻어진 SiO2-B2O3 막의 평균 기공직경은 0.0048 mu{m}이고, 표면적은 354.398 m2/g이었으며, 입자의 크기는 7 nm인 무정형의 다공체이었다. SiO2-B2O3 막의 수소/질소 혼합 기체 분리 특성은 기체분리 압력을 달리하여 조사하였다. 25{℃, ΔP 155.15cmHg에서 수소/질소 혼합 기체를 분리하여 본 결과 SiO2-B2O3 막의 수소에 대한 real separation factor(α)는 4.68이었다. 그리고 투과셀의 압력차(ΔP)값이 증가할수록 real separation factor(α), head separation factor(β), tail separation factor((equation omitted))값이 증가하였다. The porous SiO2-B2O3 membrane was prepared from Si(OC2H5)4-(CH3O)3B-C2H5OH-H2O system by sol-gel method. In order to investigate the characteristics of this membrane, we examined that using BET, IR spectrophotometer, X-ray diffractometer, SEM and TEM. At 700{℃, the surface area of SiO2-B2O3 membrane was 354.398 m2/, the median pore diameter was 0.0048 {mu}{}{m}, and the particle size of SiO2-B2O3 membrane was 7 nm. The separation properties of the gas mixture (H2/N2) through the SiO2-B2O3 membrane was studied as a function of pressure. The real separation factor(α) of SiO2-B2O3 membrane for H2/N2 gas mixture was 4.68 at 155.15 cmHg and 25{℃. The real separation factor(α), head separation factor(β) and tail separation factor((equation omitted)) were increased as the pressure of permeation cell increased.

PTMSP-PEI와 PDMS-PEI 복합막에 의한 수소/질소 혼합기체 분리

강태범,조성혜,이현경 한국막학회 2003 멤브레인 Vol.13 No.4

PTMSP-PEI와 PDMS-PEI 복합막을 제조하고, 막의 특성을 FT-IR, 1H-NMR, DSC, TGA, GPC, SEM을 사용하여 조사하였다. 제조된 PTMSP의 수평균분자량 (equation omitted)은 477,920 이었고, 중량평균분자량 (equation omitted)은 673,329이었고, 유리전이온도 (Tg)는 224℃이었다. 제조된 고분자 복합막들에 의한 H2/N2 혼합기체분리는 25℃에서 압력의 변화에 따라 조사되었다. PTMSP-PEI와 PDMS-PEI 복합막들의 수소에 대한 분리인자 (α, β, equation omitted)값은 투과셀의 압력이 증가하면 증가하였다. PTMSP-PEI 복합막의 수소에 대한 (α, β, equation omitted 값은 ΔP 30psi 와 25℃에서 2.28, 1.17, 1.96이었고, PDMS-PEI 복합막의 (α, β equation omitted 값은 3.70, 1.53, 2.42 이었다. Polymer membranes such as poly(1-trimethylsilyl-1-propyne)-polyetherimide (PTMSP-PEI) and poly(dimethylsiloxane)- polyetherimide (PDMS-PEI) composite membrane were prepared by solution casting method. To investigate the characteristics of these membranes, the analytical methods such as FT-IR, 1H-NMR, DSC, TGA, GPC, and SEM have been utilized. The number-average (equation omitted) and weight-average (equation omitted) molecular weight of PTMSP were 477,920 and 673,329 respectively. The glass transition temperature (Tg) of PTMSP was 224℃. The separation of the gas mixture (H2/N2) through the composite membranes were studied as a function of pressure. The separation factor (α, β, quation omitted) of the composite membranes used in this work increased as the pressure of permeation cell increased. The real separation factor (α), head separation factor (β), and tail separation factor (equation omitted) of PTMSP-PEI composite membrane were 2.28, 1.17, and 1.96 respectively at ΔP 30psi and 25℃. (α, β and equation omitted of PDMS-PEI composite membrane were 3.70, 1.53, and 2.42 respectively at ΔP 30psi and 25℃.

PTMSP/PDMS-PEI 복합막에 의한 수소/질소 혼합기체 분리

강태범,홍세령 한국막학회 2004 멤브레인 Vol.14 No.4

PTMSP/PDMS-PEI 복합막을 제조하고, 막의 특성을 FT-IR, 1H-NMR, DSC, TGA, GPC, SEM을 사용하여 조사하였다. 제조된 PTMSP/PDMS copolymer의 수평균분자량((equation omitted))은 501,516이었고, 중량평균분자량((equation omitted))은 675,560이었다. 제조된 고분자 복합막에 의한 H2/N2 혼합기체분리는 25{℃에서 압력의 변화에 따라 조사하였다. PTMSP/PDMS-PEI 복합막들의 수소에 대한 분리인자(α, β, (equation omitted)) 값은 투과셀의 압력이 증가하면 증가하였다. PTMSP/PDMS-PEI 복합막의 수소에 대한 α, β, (equation omitted) 값은 ΔP 345.55 kPa와 25{℃에서 각각 21.50, 49.14, 1.84이었다. PTMSP/PDMS-PEI composite membrane was prepared by solution casting method. To investigate the characteristics of this membrane, the analytical methods such as FT-IR, 1H-NMR, DSC, TGA, GPC, and SEM have been utilized. The number-average((equation omitted)) and weight-average((equation omitted)) molecular weight of PTMSP/PDMS copolymer were 501,516 and 675,560 respectively. The separation of the gas mixture(H2/N2) through the composite membrane was studied as a function of pressure. The separation factor(α, β, (equation omitted)) of the composite membrane used in this work increased as the pressure of permeation cell increased. The real separation factor(α), head separation factor(β), and tail separation factor ((equation omitted)) of PTMSP/PDMS-PEI composite membrane were 21.50, 49.14 and 1.84 respectively at ΔP 345.55 kPa and 25{℃.

黃酸망간으로부터 γ- MnO_2 生成에 關한 硏究

姜泰範 상명대학교 논문집 1986 상명대학교논문집 Vol.17 No.-

With the purpose to obtain Γ-MnO_2 by transforming MnSO_4 · H_20, MnSO_4 · H_2O was calcined at various temperatures for 4 hours and then treated with differently diluted HNO_3 solutions. The results obtained were as follows: When MnSO_4 · H_2O was heated in air, MnSO_4 was produced at 260℃~300℃, and MnO, Mn_2O_3 and Mn_3O_4 were produced at 780℃-960℃. When Mn_3O_4 was treated with 60% nitric acid for 2hours at 100℃, Γ-MnO_2 was obtained.