1 Borschiver, S., Almeida, L. F. M., & Roitman, T. (2008). Technological and market monitoring of biopolymers. Polímeros: Ciência e Tecnologia, 18(3), 256-261. http://doi.org/10.1590/S0104-14282008000300012.

2 Paoli, M. A. (2008). Biodegradation of polymers: introduction: what is biodegradation? In J. C. Andrade (Ed.), Degradação e estabilização de polímeros (pp. 107-208). Campinas: Chemkeys.

3 Murari, C. S., Moraes, D. C., Bueno, G. F., & Del Bianchi, V. L. (2013). Evaluation of the reduction in pollution of dairy products from whey fermentation in ethanol by yeast Kluyveromyces marxianus 229. Revista do Instituto de Latícinios Cândido Tostes, 68(393), 42-50. http://doi.org/10.5935/2238-6416.20130034.

4 Jesus, G. L. (2020). Obtaining, characterizing and comparison of whey protein-based films (Doctoral thesis). Universidade Federal do Rio Grande do Sul, Porto Alegre.

5 Faria, E. F. (2004). Study of the environmental impact generated in water bodies by effluent from the dairy industry in Minas Gerais (Master’s dissertation). Universidade Federal de Minas Gerais, Belo Horizonte.

6 Sarbon, N. M., Badii, F., & Howell, N. K. (2015). The effect of chicken skin gelatin and whey protein interactions on rheological and thermal properties. Food Hydrocolloids, 45, 83-92. http://doi.org/10.1016/j.foodhyd.2014.10.008.

7 Oliveira, M. J. A., Almeida, M., Amato, V. A., Parra, D. F., & Lugão, A. B. (2009). Membranas de hidrogéis de PVAL/PVP/ácido cítrico para liberação de droga. In Anais do 10º Congresso Brasileiro de Polímeros, Foz do Iguaçu, Brazil. São Carlos: ABPol.

8 Shi, R., Bi, J., Zhang, Z., Zhu, A., Chen, D., Zhou, X., Zhang, L., & Tian, W. (2008). The effect of citrus acid on the structural properties and cytotoxicity of the polyvinyl alcohol/starch films when molding at high temperature. Carbohydrate Polymers, 74(4), 763-770. http://doi.org/10.1016/j.carbpol.2008.04.045.

9 Jiang, Y., Li, Y., Chai, Z., & Leng, X. (2010). Study of the physical properties of whey protein isolate and gelatin composite films. Journal of Agricultural and Food Chemistry, 58(8), 5100-5108. http://doi.org/10.1021/jf9040904. PMid:20356044.

10 Yang, J., Webb, A. R., & Ameer, G. A. (2004). Novel citric acid- based biodegradable elastomers for tissue engineering. Advanced Materials, 16(6), 511-516. http://doi.org/10.1002/adma.200306264.

11 Kumar, A. A., Karthick, K., & Arumugam, K. P. (2011). Biodegradable Polymers and Its Applications. International Journal of Bioscience, Biochemistry, Bioinformatics, 1(3), 173-176. http://doi.org/10.7763/IJBBB.2011.V1.32.

12 Deng, L., Zhang, X., Li, Y., Que, F., Kang, X., Liu, Y., Feng, F., & Zhang, H. (2018). Characterization of gelatin/zein nanofibers by hybrid electrospinning. Food Hydrocolloids, 75, 72-80. http://doi.org/10.1016/j.foodhyd.2017.09.011.

13 American Society for Testing and Materials – ASTM. (2018). ASTM D882-18: standard test method for tensile properties of thin plastic sheeting. West Conshohocken: ASTM International.

14 Ramos, Ó. L., Reinas, I., Silva, S. I., Fernandes, J. C., Cerqueira, M. A., Pereira, R. N., Vicente, A. A., Poças, M. F., Pintado, M. E., & Malcata, F. X. (2013). Effect of whey protein purity and glycerol content upon physical properties of edible films manufactured therefrom. Food Hydrocolloids, 30(1), 110-122. http://doi.org/10.1016/j.foodhyd.2012.05.001.

15 Kaewprachu, P., Osako, K., Benjakul, S., Tongdeesoontorn, W., & Rawdkuen, S. (2015). Biodegradable protein-based films and their properties: a comparative study. Packaging Technology & Science, 29(2), 77-90. http://doi.org/10.1002/pts.2183.

16 Kurek, M., Galus, S., & Debeaufort, F. (2014). Surface, mechanical and barrier properties of bio-based composite films based on chitosan and whey protein. Food Packaging and Shelf Life, 1(1), 56-67. http://doi.org/10.1016/j.fpsl.2014.01.001.

17 Lima, J. E. S. (2019). Determination of contact angle, surface tension and adhesion work of a urethane adhesive primer. Revista Caleidoscópio, 11, 1-6.

18 Flaker, C. H. C., Lourenço, R. V., Bittante, A. M. Q. B., & Sobral, P. J. A. (2015). Gelatin-based nanocomposite films: a study on montmorillonite dispersion methods and concentration. Journal of Food Engineering, 167, 65-70. http://doi.org/10.1016/j.jfoodeng.2014.11.009.

19 Wang, W., Li, C., Zhang, H., & Ni, Y. (2016). Using liquid smoke to improve mechanical and water resistance properties of gelatin films. Journal of Food Science, 81(5), E1151-E1157. http://doi.org/10.1111/1750-3841.13282. PMid:27061211.

20 Soazo, M., Rubiolo, A. C., & Verdini, R. A. (2011). Effect of drying temperature and beeswax content on physical properties of whey protein emulsion films. Food Hydrocolloids, 25(1), 1251-1255. http://doi.org/10.1016/j.foodhyd.2010.11.022.

21 Guerrero, P., Stefani, P. M., Ruseckaite, R. A., & de la Caba, K. (2011). Functional properties of films based on soy protein isolate and gelatin processed by compression molding. Journal of Food Engineering, 105(1), 65-72. http://doi.org/10.1016/j.jfoodeng.2011.02.003.

22 Le Tien, C., Letendre, M., Ispas-Szabo, P., Mateescu, M. A., Delmas-Patterson, G., Yu, H.-L., & Lacroix, M. (2000). Development of biodegradable films from whey proteins by cross- linking and entrapment in cellulose. Journal of Agricultural and Food Chemistry, 48(11), 5566-5575. http://doi.org/10.1021/jf0002241. PMid:11087520.

23 Oliveira, A. C. S., Ugucioni, J. C., Rocha, R. A., & Borges, S. V. (2018). Development of whey protein isolate/polyaniline smart packaging: morphological, structural, thermal, and electrical properties. Journal of Applied Polymer Science, 136(14), 47316. http://doi.org/10.1002/app.47316.

24 Abedinia, A., Ariffin, F., Huda, N., & Mohammadi Nafchi, A. (2018). Preparation and characterization of a novel biocomposite based on duck feet gelatin as alternative to bovine gelatin. International Journal of Biological Macromolecules, 109, 855-862. http://doi.org/10.1016/j.ijbiomac.2017.11.051. PMid:29133087.

25 Dabove, D. A. C. (2013). Development of gycerol-based polymers (Master’s dissertation). Universidade Federal de São Carlos, São Carlos.