Fabrication and properties of a novel superabsorbent composite based on coco peat and poly (acrylic acid) cross-linked trimethylolpropane trimaleate under ultraviolet irradiation

NWIPB OpenIR

	Fabrication and properties of a novel superabsorbent composite based on coco peat and poly (acrylic acid) cross-linked trimethylolpropane trimaleate under ultraviolet irradiation
	Su, Xiaoyu ; Bai, Bo ; Xu, Xiaohui ; Ding, Chenxu ; Wang, Honglun ; Suo, Yourui
	2016-09-01
发表期刊	POLYMERS FOR ADVANCED TECHNOLOGIES
摘要	A series of novel poly(acrylic acid)/coco peat (PAA/CP) superabsorbent composites were prepared via the ultraviolet irradiation copolymerization of acrylic acid monomer (PAA) and coco peat cellulose (CP) in the presence of the cross-linker trimethylolpropane trimaleate. The physico-chemical structures of obtained PAA/CP were characterized by Fourier transform infrared spectroscopy, thermogravimetry/derivative thermogravimetry, X-ray diffraction, and scanning electron microscopy, respectively. The critical parameters of affecting the water absorbency of PAA/CP, including the cross-linker level, amount of CP and reaction time, were studied in detailed. The experimental results showed that the PAA/CP samples exhibited the maximum swelling value of 523.09g/g in distilled water and 40.52g/g in 0.9wt % NaCl solution. The swelling behaviors of PAA/CP were significantly relied on the concentration of salt solution and the pH of external solution. The effect of ions species on the swelling performance was in the order: Na+>Ca2+>Fe3+ , and in pH 2.2 and 7.2 aqueous solutions PAA/CP composites displayed better pH-responsiveness and reversible on-off switching characteristics. Urea, as an agrochemical model, was loaded into PAA/CP substrate to supply with nitrogen nutrient. The test of their loading and releasing diffusion performance of urea suggested that the urea loading percentage of PAA/CP was remarkably dependent on the concentration of aqueous urea solutions and the release of urea from loaded PAA/CP samples in water followed a non-Fickian mechanism. Owing to their considerable good water absorption capacity, slow urea release, economical and environment-friendly merits, PAA/CP composites could be exploited for the agriculture applications. Copyright (c) 2016 John Wiley & Sons, Ltd.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/32913
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Su, Xiaoyu,Bai, Bo,Xu, Xiaohui,et al. Fabrication and properties of a novel superabsorbent composite based on coco peat and poly (acrylic acid) cross-linked trimethylolpropane trimaleate under ultraviolet irradiation[J]. POLYMERS FOR ADVANCED TECHNOLOGIES,2016.
APA	Su, Xiaoyu,Bai, Bo,Xu, Xiaohui,Ding, Chenxu,Wang, Honglun,&Suo, Yourui.(2016).Fabrication and properties of a novel superabsorbent composite based on coco peat and poly (acrylic acid) cross-linked trimethylolpropane trimaleate under ultraviolet irradiation.POLYMERS FOR ADVANCED TECHNOLOGIES.
MLA	Su, Xiaoyu,et al."Fabrication and properties of a novel superabsorbent composite based on coco peat and poly (acrylic acid) cross-linked trimethylolpropane trimaleate under ultraviolet irradiation".POLYMERS FOR ADVANCED TECHNOLOGIES (2016).