Studies On Preparation And Application Properties Of CO₂ Storage Material By The System Of Diol-amines

Since the 21st century,it has become a global problem that how to effectively reduce and capture carbon dioxide?CO₂?.The large amount of CO₂ emitted during energy use,such as fossil fuel combustion,has led to irreversible changes in the global climate,which forcing mankind to speed up the introduction of a series of response measures.It is of great environmental and economic significance to develop a CO₂ chemical development route which combines CO₂ capture,fixation and resource utilization.Based on the previous work of our research group,a series of mixed solutions of ethylene glycol diol and ethylenediamine were developed to absorb and capture CO₂.The structure and basic physical and chemical properties of 11 kinds of CO₂SMs were characterized.The structure of CO₂SMs is similar to ammonium bicarbonate?NH₄HCO₃?.Previous work indicated that the CO₂SMs hava good promoting effects on tomato development.In order to determine the prospect of large-scale application of CO₂SMs in agricultural growth,it will be continued to investigate the difference of promoting effect of CO₂SMs on different plants of the same family and different families.At the same time,the characteristic structure of-NH₃⁺·^—O-C?=O?O-in the CO₂SMs can form the characteristic functional group of-N?H?-C?=O?O-in the polyurethane by intramolecular dehydration,which is a new idea of converting CO₂SMs into downstream high value chemicals and realizing the utilization of CO₂ resources.The effect of CO₂SMs on vegetative growth and reproductive growth of eggplant,tomato,pimiento and cucumber were obvious.Compare with initial plant,the growth ratio of eggplant plant was 4.00⁸.68 times,the average stem diameter was 0.94 cm¹.14 cm,the root dry-wet ratio was 31.01%³5.89%,the average size of maximum leaf was 9.5 cm×5.8 cm,and the average fruit number was 4⁸.The growth ratio of tomato plant was7.19¹6.50 times,the average stem diameter is 1.06 cm¹.22 cm,the root dry-wet ratio is 26.58%³9.73%,and the average fruit range is 19²3;the growth ratio of green pepper plant to initial plant height is 1.40⁴.04 times,the average stem dry diameter is0.98 cm¹.16 cm,and the root dry-wet ratio of green pepper is 29.84%⁴3.79%,the average number of fruits ranged from 6⁹;the growth ratio of cucumber plants to the initial plant height was 3.27⁸.60 times,the average stem diameter ranged from 0.86 cm¹.04 cm,the root dry-wet ratio ranged from 25.05%³8.78%,the leaf average size was9.5 cm×7.7 cm,and the average fruit number ranged from 2⁶.Carbon and nitrogen in CO₂SMs play a synergistic role in plant growth and promote plant growth.The optimum reaction conditions for preparing polyurethane by dehydration of CO₂SMs were confirmed as follows:reaction temperature 90 C,reaction time 12 h,dosage of dehydrating agent 10 mL and yield?2.13².54?g/3.0 g CO₂SM.The average molecular weight of polyurethane is 10400 g/mol¹2700 g/mol,the average molecular weight is18400 g/mol²4100 g/mol and the PDI value ranges from 1.6¹.9.Polyurethane can exist stably within 142oC,the highest complete decomposition temperature being 409oC and the lowest complete decomposition temperature being 359oC.All polyurethanes can not dissolve in water.This technology route has generally applied for 11 kinds of CO₂SMs prepared by research group.