Composite semipermeable membrane

• Main Authors: TABAYASHI SHUNSUKE, OKANISHI RYOSUKE, HIGASHI MASAKI, SASAKI TAKAO, AMANO YUTA, MINEHARA HIROKI, YOSHINO TAKASHI
• Format: Patent
• Language: Chinese; English
• Published: 08.12.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The present invention relates to a composite semipermeable membrane which is provided with a support membrane and a separation function layer provided on the support membrane, and wherein the separation function layer comprises a thin film that forms a pleated structure including a plurality of protrusions. The actual length L of the thin film per 1 [mu] m length of the support film in a cross-sectional direction perpendicular to the film surface is 3.0 [mu] m or more, and the thickness of the thin film in the protrusions is 15 nm or more. 本发明涉及复合半透膜，其为具备支承膜、和设于所述支承膜上的分离功能层的复合半透膜，其中，所述分离功能层包含薄膜，所述薄膜形成包含多个突起的褶皱结构，在与膜面垂直的方向的截面方向上的每1μm长度的所述支承膜的所述薄膜的实际长度L为3.0μm以上，所述突起中的薄膜的厚度为15nm以上。