Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (10): 2182.doi: 10.7503/cjcu20140331
• Physical Chemistry • Previous Articles Next Articles
QIN Jiaolong, PANG Wenwen, YANG Xiaodong, ZHANG Teng, REN Tianrui*()
Received:
2014-04-09
Online:
2014-10-10
Published:
2014-09-18
Contact:
REN Tianrui
E-mail:trren@shnu.edu.cn
Supported by:
CLC Number:
TrendMD:
QIN Jiaolong, PANG Wenwen, YANG Xiaodong, ZHANG Teng, REN Tianrui. Studies on the Surface Properties of Alcohol Ethoxylate and the Application in Suspension Concentrate†[J]. Chem. J. Chinese Universities, 2014, 35(10): 2182.
No. | γcmc/(mN·m-1) | 105cmc/(mol·L-1) | Acmc/(nm2·molecule-1) | ΔGm/(kJ·mol-1) | HLB |
---|---|---|---|---|---|
AEO-4 | 25.80 | 3.79 | 0.601 | -25.14 | 9.96 |
AEO-7 | 26.80 | 4.63 | 0.941 | -24.74 | 12.55 |
AEO-9 | 29.10 | 6.52 | 0.956 | -23.89 | 13.49 |
AEO-15 | 37.50 | 7.86 | 0.960 | -23.43 | 15.16 |
AEO-20 | 41.90 | 8.44 | 1.266 | -23.25 | 15.69 |
Table 1 Surface and micellar properties of AEO surfactants obtained in aqueous solution*
No. | γcmc/(mN·m-1) | 105cmc/(mol·L-1) | Acmc/(nm2·molecule-1) | ΔGm/(kJ·mol-1) | HLB |
---|---|---|---|---|---|
AEO-4 | 25.80 | 3.79 | 0.601 | -25.14 | 9.96 |
AEO-7 | 26.80 | 4.63 | 0.941 | -24.74 | 12.55 |
AEO-9 | 29.10 | 6.52 | 0.956 | -23.89 | 13.49 |
AEO-15 | 37.50 | 7.86 | 0.960 | -23.43 | 15.16 |
AEO-20 | 41.90 | 8.44 | 1.266 | -23.25 | 15.69 |
Sample | Bingham model | Herschel-Bulkley model | ||||||
---|---|---|---|---|---|---|---|---|
τ0/Pa | ηP/(Pa·s) | R2 | n | K/(Pa·sn) | τ0/Pa | R2 | ||
SC | 18.22 | 0.0227 | 0.9458 | 1.1489 | 0.009358 | 18.47 | 0.9468 | |
SC-AEO-4 | 8.967 | 0.01184 | 0.9945 | 0.8802 | 0.02433 | 8.828 | 0.9970 | |
SC-AEO-7 | 1.2806 | 0.0302 | 0.9458 | 0.6507 | 0.2238 | 0.3696 | 0.9999 | |
SC-AEO-9 | 0.8827 | 0.02191 | 0.9487 | 0.6551 | 0.1575 | 0.2436 | 0.9999 | |
SC-AEO-15 | 2.8473 | 0.02439 | 0.9692 | 0.7128 | 0.1317 | 2.176 | 0.9982 | |
SC-AEO-20 | 1.3026 | 0.02536 | 0.9498 | 0.6385 | 0.2040 | 0.4668 | 0.9999 |
Table 2 Rheological parameters of SC-AEOs
Sample | Bingham model | Herschel-Bulkley model | ||||||
---|---|---|---|---|---|---|---|---|
τ0/Pa | ηP/(Pa·s) | R2 | n | K/(Pa·sn) | τ0/Pa | R2 | ||
SC | 18.22 | 0.0227 | 0.9458 | 1.1489 | 0.009358 | 18.47 | 0.9468 | |
SC-AEO-4 | 8.967 | 0.01184 | 0.9945 | 0.8802 | 0.02433 | 8.828 | 0.9970 | |
SC-AEO-7 | 1.2806 | 0.0302 | 0.9458 | 0.6507 | 0.2238 | 0.3696 | 0.9999 | |
SC-AEO-9 | 0.8827 | 0.02191 | 0.9487 | 0.6551 | 0.1575 | 0.2436 | 0.9999 | |
SC-AEO-15 | 2.8473 | 0.02439 | 0.9692 | 0.7128 | 0.1317 | 2.176 | 0.9982 | |
SC-AEO-20 | 1.3026 | 0.02536 | 0.9498 | 0.6385 | 0.2040 | 0.4668 | 0.9999 |
Ssmple | W1(%) | W2(%) | St | τ0/Pa | τflow/Pa | γflow(%) |
---|---|---|---|---|---|---|
SC | 30.00 | 25.00 | 813.5 | 18.47 | 18.47 | 2.492 |
SC-AEO-4 | 94.55 | 91.05 | 745.6 | 8.828 | 2.228 | 29.09 |
SC-AEO-7 | 95.92 | 94.57 | 12.24 | 0.3696 | 0.2967 | 10.59 |
SC-AEO-9 | 94.42 | 96.12 | 11.12 | 0.2436 | 0.2286 | 13.46 |
SC-AEO-15 | 94.89 | 94.47 | 89.23 | 2.176 | 0.7787 | 27.70 |
SC-AEO-20 | 95.01 | 95.81 | 18.41 | 0.4668 | 0.6075 | 23.31 |
Table 3 Stability analysis of SC-AEOs
Ssmple | W1(%) | W2(%) | St | τ0/Pa | τflow/Pa | γflow(%) |
---|---|---|---|---|---|---|
SC | 30.00 | 25.00 | 813.5 | 18.47 | 18.47 | 2.492 |
SC-AEO-4 | 94.55 | 91.05 | 745.6 | 8.828 | 2.228 | 29.09 |
SC-AEO-7 | 95.92 | 94.57 | 12.24 | 0.3696 | 0.2967 | 10.59 |
SC-AEO-9 | 94.42 | 96.12 | 11.12 | 0.2436 | 0.2286 | 13.46 |
SC-AEO-15 | 94.89 | 94.47 | 89.23 | 2.176 | 0.7787 | 27.70 |
SC-AEO-20 | 95.01 | 95.81 | 18.41 | 0.4668 | 0.6075 | 23.31 |
Sample | Structure recovery ratio(%) | R(%) | |||
---|---|---|---|---|---|
5 s | 7 s | 10 s | 15 s | ||
SC | 113.9 | 111.4 | 112.2 | 111.7 | ≥20 |
SC-AEO-4 | 76.69 | 83.84 | 91.68 | 99.07 | 10 |
SC-AEO-7 | 54.92 | 60.06 | 64.37 | 68.78 | 7 |
SC-AEO-9 | 44.26 | 49.70 | 54.05 | 58.41 | ≤5 |
SC-AEO-15 | 27.91 | 31.41 | 35.06 | 38.75 | ≤3 |
SC-AEO-20 | 40.63 | 45.17 | 48.97 | 52.93 | ≤3 |
Table 4 Rheological data of three interval thixotropy and residual pourability test
Sample | Structure recovery ratio(%) | R(%) | |||
---|---|---|---|---|---|
5 s | 7 s | 10 s | 15 s | ||
SC | 113.9 | 111.4 | 112.2 | 111.7 | ≥20 |
SC-AEO-4 | 76.69 | 83.84 | 91.68 | 99.07 | 10 |
SC-AEO-7 | 54.92 | 60.06 | 64.37 | 68.78 | 7 |
SC-AEO-9 | 44.26 | 49.70 | 54.05 | 58.41 | ≤5 |
SC-AEO-15 | 27.91 | 31.41 | 35.06 | 38.75 | ≤3 |
SC-AEO-20 | 40.63 | 45.17 | 48.97 | 52.93 | ≤3 |
Fig.12 Effect of AEOs with different EO chains on dispersion ability of particles (A) Short or no AEO: flocculation; (B) proper EO chains: dispersion; (C) too long EO chains: bridging.
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