The aim of this study was to improve ultrafiltration (UF) performance during clarification of raw apple juice through surface modification of commercial polysulfone membranes (US100) by low-pressure oxygen plasma treatment (LP-OPlsT). A Plasma power of 90 W and exposure time of 10 min were determined as the most effective parameters enabling an increase in the ΔG_iwi value of the plain membrane from (−) 25 ± 2 mN m⁻¹ to (+) 30 ± 1 mN m⁻¹. Improved hydrophilicity achieved by LP-OPlsT remarkably enhanced the performance of US100 throughout the clarification of raw apple juice without the need of an additional pre-flocculation step. While R_frev (86%) was the dominant resistance controlling the fouling during UF of raw apple juice through the plain membrane, the contribution of R_frev to R_t decreased to 56% after pre-flocculation step. LP-OPlsT further decreased this ratio, up to 46%, confirming the charge repulsion between the modified membrane and the foulant particles.

这项研究的目的是通过低压氧等离子体处理（LP-OPlsT）对商用聚砜膜（US100）进行表面改性，从而提高苹果汁澄清过程中的超滤（UF）性能。确定90 W的等离子体功率和10分钟的暴露时间是最有效的参数，可以使平膜的_ΔGiwi值从（-）25±2 mN m ^-1增加到（+）30±1 mN m ^-1。在整个原苹果汁的澄清过程中，通过LP-OPlsT获得的改善的亲水性显着提高了US100的性能，而无需额外的预絮凝步骤。而R _frev（86％）是控制未加工苹果汁通过平膜超滤过程中结垢的主要阻力，预絮凝步骤后，R _frev对R _t的贡献降低至56％。LP-OPlsT进一步降低了这一比例，最高达到46％，从而确认了改性膜与污垢颗粒之间的电荷排斥。