SG11201902910XA - A hollow fiber membrane - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property 111111111111111111111010111111111111111111H111111111111111111111111111111111111110111111 Organization International Bureau (10) International Publication Number (43) International Publication Date ...... WO 2018/080398 Al 03 May 2018 (03.05.2018) WI P0 I P C T (51) International Patent Classification: Department of Chemical and Biomolecular Engineering, 21 BOlD 69/08 (2006.01) BOlD 61/36 (2006.01) Lower Kent Ridge Road, Singapore 119077 (SG). BOlD 67/00 (2006.01) (74) Agent: PATEL, Upasana; Marks & Clerk Singapore LLP, (21) International Application Number: Tanjong Pagar, P 0 Box 636, Singapore 910816 (SG). PCT/SG2017/050538 (81) Designated States (unless otherwise indicated, for every (22) International Filing Date: kind of national protection available): AE, AG, AL, AM, 26 October 2017 (26.10.2017) AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, (25) Filing Language: English DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, (26) Publication Language: English HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, (30) Priority Data: KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 10201608965S 26 October 2016 (26.10.2016) SG MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (71) Applicant: NATIONAL UNIVERSITY OF SINGA- SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, PORE [SG/SG]; 21 Lower Kent Ridge Road, Singapore TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. 119077 (SG). (84) Designated States (unless otherwise indicated, for every _ (72) Inventors: ZUO, Man; c/o National University of Singa- kind of regional protection available): ARIPO (BW, GH, pore, Faculty of Engineering, Department of Chemical and GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, Biomolecular Engineering, 21 Lower Kent Ridge Road, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, Singapore 119077 (SG). CHUNG, Tai-Shung Neal; c/o TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, National University of Singapore, Faculty of Engineering, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, = = = (54) Title: A HOLLOW FIBER MEMBRANE Figure 1 = = 108 102 = = , • 104 ,,• „ = — = = o 0 Ir \" = - 0 s : = = 100 110 106 1-1 112 X) (57) : There is provided a hollow fiber membrane for vacuum membrane distillation having a maximum tensile strength of > 01 en 3.5 MPa and a liquid entry pressure (LEP) of > 3.0 bar, wherein the hollow fiber membrane is a single layer hollow fiber membrane CZ comprising a wall with a thickness of < 150 [im and a cross-section comprising two open cell layers with an array of interconnected 00 c::) pores and a macrovoid layer between the two open cell layers. The open cell layers may be sponge-like porous layers. The hollow ----. fiber membrane may comprise a hydrophobic polymer, in particular polyvinylidene fluoride (PVDF). The hollow fiber membrane is 00 °C and external coagulation bath temperature of , I fabricated via a dry jet wet spinning technique with bore fluid temperature of 25-65 © 25-55 °C. The hollow fiber has improved mechanical strength and vacuum membrane distillation flux. ei O [Continued on next page] WO 2018/080398 Al MIDEDIMOMMIDIREIDINIRMOIMIINIEHMEMOIMIE TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — of inventorship (Rule 4.17(iv)) Published: — with international search report (Art. 21(3))