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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and properties of a degradable interpenetrating polymer networks based on starch with water retention, amelioration of soil, and slow release of nitrogen and phosphorus fertilizer
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Preparation and properties of a degradable interpenetrating polymer networks based on starch with water retention, amelioration of soil, and slow release of nitrogen and phosphorus fertilizer

机译：基于淀粉的保水，土壤改良，氮磷肥缓释性可降解互穿聚合物网络的制备与性能

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摘要

In this study, we aimed to develop a degradable nitrogen and phosphorus (NP) fertilizer with properties of slow release, water retention, and remediation of saline soil; the nitrogen and phosphorus was coated with starch/poly(acrylic acid-co-acrylamide) [poly(AA-co-AM)] superabsorbent (SAAmF) by reverse suspension radical copolymerization. The variable influences on the water absorbency were investigated and optimized. The results of the structure and morphology characterization of SAAmF show that poly(AA-co-AM) was grafted partly from the chain of starch, and the different contents of starch brought about a difference in the size of the three-dimensional net hole of the coating polymer. The property of water retention, the behaviors of slow release of nutrient, and the degradation of the SAAmF were evaluated, respectively, and the results revealed that the water transpiration ratio of soil with SAAmF was lower by approximately 8 percentage points than that of the blank test, about 60% nutrient was released from SAAmF by the 30th day, and 32 wt % of SAAmF with a content of starch of 20% was degraded after 55 days. Moreover, a considerable decrease in the conductivity was observed, which revealed a sharp reduction in the concentration of residual ions for the soil mixed with SAAmF. It may be inferred from these that the product seems to be a promising vehicle for the management of soils, including saline soils.
机译：在这项研究中，我们旨在开发一种可降解的氮磷（NP）肥料，具有缓释，保水和盐渍土壤修复的特性。通过反向悬浮自由基共聚，用淀粉/聚（丙烯酸-共-丙烯酰胺）[poly（AA-co-AM）]超吸收剂（SAAmF）涂覆氮和磷。研究和优化了对吸水率的变量影响。 SAAmF的结构和形态表征结果表明，聚（AA-co-AM）的一部分是从淀粉链上接枝的，淀粉含量的不同导致了三维网孔尺寸的变化。涂料聚合物。分别评价了保水特性，养分缓慢释放行为和SAAmF的降解，结果表明，SAAmF的土壤水分蒸发率比空白土壤低约8个百分点。试验中，到第30天，约有60％的营养物质从SAAmF中释放出来，并且55天后，淀粉含量为20％的32％（重量）的SAAmF降解了。此外，观察到电导率显着下降，这表明与SAAmF混合的土壤中残留离子的浓度急剧下降。从这些可以推断出，该产品似乎是用于土壤包括盐渍土壤管理的有前途的载体。

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