Department of Chemical Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
Bioresour Technol. 2012 Apr;110:412-6. doi: 10.1016/j.biortech.2012.01.147. Epub 2012 Feb 2.
A cost competitive biomaterial for widespread applications in food and water technology is an urgent need. We report a new hydrophobic biomaterial film for soluble pollutant sorption and reduction of microbial load in water environment. Guar gum from the seeds of Cyamopsis tetragonolobus was hydrophobically modified following benzoyl chloride reaction in aqueous alkali. The new biopolymer derivative is insoluble in water and form castable films with a high degree of surface hydrophobicity. The film water vapor permeability was 0.233±0.029gmmkPa(-1)h(-1)m(-2) and the tensile property was 38.65±3.66MPa. The film surface contact angle against water was 77.36±1.09°. The new biomaterial film demonstrated strong antimicrobial contact killing against both gram positive and gram negative bacteria. It also act as an efficient sorbent for a range of water soluble organic pollutants.
在食品和水技术领域，广泛应用具有成本竞争力的生物材料是当务之急。我们报告了一种新的疏水生物材料薄膜，用于吸附可溶性污染物和减少水环境中的微生物负荷。瓜尔胶是从刺槐豆种子中提取的，在碱性水溶液中用氯化苯甲酰进行疏水改性。这种新的生物聚合物衍生物不溶于水，可形成具有高表面疏水性的可浇铸薄膜。薄膜水蒸气透过率为 0.233±0.029gmmkPa(-1)h(-1)m(-2)，拉伸性能为 38.65±3.66MPa。薄膜表面对水的接触角为 77.36±1.09°。这种新型生物材料薄膜对革兰氏阳性菌和革兰氏阴性菌均具有很强的抗菌接触杀灭作用。它还可以作为一系列水溶性有机污染物的有效吸附剂。
