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首页> 美国卫生研究院文献>International Journal of Molecular Sciences >Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation
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Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation

机译：基于甲状腺酸和再循环PLA的多元醇混合物用于合成易生物降解的刚性聚氨酯泡沫的合成

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Two polyol raw materials were obtained in the conducted research, one based on metasilicic acid (MSA), the other based on poly(lactic acid) (PLA) waste. The obtained polyols were characterized in terms of their applicability for the production of rigid polyurethane foams (RPUFs). Their basic analytical properties (hydroxyl number, acid number, elemental analysis) and physicochemical properties (density, viscosity) were determined. The assumed chemical structure of the obtained new compounds was confirmed by performing FTIR and 1H NMR spectroscopic tests. Formulations for the synthesis of RPUFs were developed on the basis of the obtained research results. A mixture of polyols based on MSA and PLA in a weight ratio of 1:1 was used as the polyol component in the polyurethane formulation. The reference foam in these tests was a foam that was synthesized only on the basis of MSA-polyol. The obtained RPUFs were tested for basic functional properties (apparent density, compressive strength, water absorption, thermal conductivity coefficient etc.). Susceptibility to biodegradation in soil environment was also tested. It was found that the use of mixture of polyols based on MSA and PLA positively affected the properties of the obtained foam. The polyurethane foam based on this polyol mixture showed good thermal resistance and significantly reduced flammability in comparison with the foam based MSA-polyol. Moreover, it showed higher compressive strength, lower thermal conductivity and biodegradability in soil. The results of the conducted tests confirmed that the new foam was characterized by very good performance properties. In addition, this research provides information on new waste management opportunities and fits into the doctrine of sustainable resource management offered by the circular economy.
机译：在进行的研究中获得了两种多元醇原料，基于甲状腺酸（MSA），基于聚（乳酸）（PLA）废物。所得多元醇的特征在于它们适用于生产刚性聚氨酯泡沫（RPUF）。确定其基本分析性质（羟基，酸值，元素分析）和物理化学性质（密度，粘度）。通过进行FTIR和1H NMR光谱试验证实所得新化合物的假定化学结构。在获得的研究结果的基础上开发了用于合成RPUF的制剂。基于MSA和PLA以1：1的重量比的多元醇的混合物用作聚氨酯制剂中的多元醇组分。这些试验中的参考泡沫是仅基于MSA-Polyol合成的泡沫。测试所得的RPUFS用于基本功能性（表观密度，抗压强度，吸水，导热系数等）。还测试了对土壤环境中生物降解的易感性。发现使用基于MSA和PLA的多元醇的混合物积极地影响获得的泡沫的性质。基于该多元醇混合物的聚氨酯泡沫显示出良好的耐热性，与基于泡沫的MSA-Polyol相比，易燃性显着降低。此外，它显示出较高的抗压强度，降低土壤中的导热性和生物降解性。进行的测试结果证实新的泡沫的特征在于非常好的性能。此外，本研究还提供了有关新废物管理机会的信息，并适合循环经济提供的可持续资源管理的学说。

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