With regard to your question, you will find the following literature useful:
1. Lee, R. J., Wang, S., Turk, M. J., & Low, P. S. (1998). The effects of pH and intraliposomal buffer strength on the rate of liposome content release and intracellular drug delivery. Bioscience reports, 18(2), 69-78.
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2. Sułkowski, W. W., Pentak, D., Nowak, K., & Sułkowska, A. (2005). The influence of temperature, cholesterol content and pH on liposome stability. Journal of molecular structure, 744, 737-747.
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3. Janssen, M. J. H., Crommelin, D. J. A., Storm, G., & Hulshoff, A. (1985). Doxorubicin decomposition on storage. Effect of pH, type of buffer and liposome encapsulation. International journal of pharmaceutics, 23(1), 1-11.
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4. Shao, X. R., Wei, X. Q., Zhang, S., Fu, N., Lin, Y. F., Cai, X. X., & Peng, Q. (2017). Effects of micro-environmental pH of liposome on chemical stability of loaded drug. Nanoscale Research Letters, 12(1), 1-8.
5. Yin, M. C., & Faustman, C. (1993). Influence of temperature, pH, and phospholipid composition upon the stability of myoglobin and phospholipid: A liposome model. Journal of agricultural and food chemistry, 41(6), 853-857.