{"product_id":"ceecem","title":"Economic Cation-Exchange Membrane (Homogeneous vs. Heterogeneous) for Electrodialysis (ED), CEECEM","description":"\u003cp\u003eIn Electrodialysis (ED), the Cation Exchange Membrane (CEM) is responsible for the selective transport of cations (e.g., Na+, Ca^{2+}, Li+) while blocking anions and water. Similar to anion membranes, the choice between homogeneous and heterogeneous structures determines the efficiency, lifespan, and cost-effectiveness of the water treatment or chemical process.\u003c\/p\u003e\n\u003cp\u003eIn a homogeneous CEM, the negatively charged functional groups (typically sulfonic acid groups, -SO3^-) are chemically bonded to a uniform polymer backbone. The membrane is a single-phase material. The polymer matrix and the ion-exchange groups are integrated at the molecular level, often created through polymerization of monomers or functionalization of a pre-formed film. It is suitable for high-purity applications, Lithium salt concentration, and energy-sensitive industrial processes.\u003c\/p\u003e\n\u003cp\u003eHeterogeneous CEMs are composite materials. They are made by mixing finely ground cation-exchange resin (like those used in water softeners) with a thermoplastic binder (such as Polyethylene or Polypropylene). It is a \"macro-composite\" where the active resin particles are physically trapped within an inert plastic matrix. It is suitable for blackish water desalination, wastewater pre-treatment, and rugged environments where the stack might be disassembled and cleaned frequently.\u003c\/p\u003e\n\u003ctable style=\"width: 100.036%; height: 192.637px;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 40.2375px;\"\u003e\n\u003ctd style=\"width: 34.8795%; height: 40.2375px;\"\u003e\u003cem\u003ePart Number\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%; height: 40.2375px;\"\u003e\n\u003cp\u003e\u003cspan\u003eCEECEMHO (C-E-ECEM-HO)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003eCEECEMHE (C-E-ECEM-HE)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\u003cem\u003eAppearance\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003eLight Yellow\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003ePink to Red\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 35.6px;\"\u003e\n\u003ctd style=\"width: 34.8795%; height: 35.6px;\"\u003e\u003cem\u003eExchange Capacity (Dry)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%; height: 35.6px;\"\u003e\n\u003cp\u003e\u003cspan\u003e2.2\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e2.0\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.8795%;\"\u003e\u003cem\u003eSelectivity\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e≥95%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e≥90%\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.8795%;\"\u003e\u003cem\u003eWet Thickness\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e0.30-0.35 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e0.4 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.8795%;\"\u003e\u003cem\u003eArea Resistance (0.5 M NaCl)\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e\u0026lt;5.5 Ω cm2\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cem\u003e~11 Ω cm2\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.8795%;\"\u003e\u003cem\u003eThermal Stability\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤50°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e≤45°C\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.8795%;\"\u003e\u003cem\u003ePackage Grade\u003c\/em\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e10cm * 10cm\/pcs\/pack (a larger size can be supplied upon request)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 32.1827%;\"\u003e\n\u003cp\u003e\u003cspan\u003e10cm * 10cm\/pcs\/pack (a larger size can be supplied upon request)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eReference: \u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0376738817312000\"\u003eM.A. Andreeva, et al., Effect of homogenization and hydrophobization of a cation-exchange membrane surface on its scaling in the presence of calcium and magnesium chlorides during electrodialysis, J. Membrane Sci., 2017, 540, 183-191\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S0376738822004501\"\u003eLászló Koók, et al., László Koók, Functional stability of novel homogeneous and heterogeneous cation exchange membranes for abiotic and microbial electrochemical technologies, J. Membrane Sci., 2022, 658, 120705\u003c\/a\u003e. \u003c\/li\u003e\n\u003c\/ol\u003e","brand":"SS","offers":[{"title":"Homogeneous AEM","offer_id":47478849700070,"sku":"CEECEMHO","price":29.0,"currency_code":"USD","in_stock":true},{"title":"Heterogeneous AEM","offer_id":47478849732838,"sku":"CEECEMHE","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/6591\/1526\/files\/CEECEM_02.png?v=1774375644","url":"https:\/\/echemsupplies.com\/products\/ceecem","provider":"EChem Supplies","version":"1.0","type":"link"}