Development and performance study of a composite protein foaming agent based on human hair residue

The instability and collapse of drilling holes in gas extraction seriously affect the effectiveness of gas extraction. Developing high-performance drilling protection materials is of great significance to ensure the effectiveness of gas extraction. In response to the need for high strength and permeability of drilling protective materials, this article selects human hair residue as the mother liquor material for composite protein foaming agents based on the high protein content of animal hoof horns and hair materials. Reasonable hydrolysis solution and its ratio have been determined, as well as the optimal active agent, foam stabilizer and their dosage .A new type of Foam concrete material with high strength, high permeability and environmental protection was developed by mixing and improving the foaming agent, and the optimal amount of foam was determined based on its compressive strength and permeability experiments. The results show that: 1) The foaming volume of foaming agent mother liquor prepared by NaOH after stirring for 1 min is 1.58 times of the foaming volume of foaming agent mother liquor prepared by Ca (OH) 2 , while the 1-hour subsidence distance of NaOH hydrolytic foaming agent mother liquor is only 0.59 of that of Ca (OH) 2 hydrolytic foaming agent mother liquor, and the hydrolysis rate of NaOH is significantly higher than that of Ca (OH) 2 . When sodium hydroxide is selected to hydrolyze protein, the optimal ratio of foaming agent mother liquor to water is 1:4. 2) K12, AOS, and SLS have very significant foaming effects on protein mother liquor, while LAS has extremely poor foaming effect.The foaming volume SLS>AOS>K12 indicates that SLS has the best foaming performance; The 1-hour settlement distance AOS>K12>SLS indicates the optimal foam stability performance of AOS; The variation curves of foam volume and 1-hour settling distance with the dosage of the four composite systems of active agents all roughly show an inverted "V" shape, and the optimal dosage of active agents is 2.0g/L. 3) Compared with the foam stabilizer Gum arabic and Calcium stearate, Calcium stearate has a better effect as the mother liquor mixed with anionic foam stabilizer and anionic surfactant. It is determined that the best combination scheme for foam performance is 2.0g/L lauryl polyoxyethylene ether sodium sulfate (SLS)+0.3% Calcium stearate. 4) The Foam concrete developed based on the compound foaming agent of human hair and slag has high strength (the strength exceeds 11MPa) and high permeability (the average permeability reaches 2.13MD); With the increase of foam content, the porosity of Foam concrete gradually increases, the permeability first increases and then decreases, and the compressive strength gradually decreases. When the amount of foaming agent is 25ml, its performance is the best.