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2011 striegel waterborne presentation

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This presentation presents an overview of polymer coatings for outdoor cultural heritage. The presentation defines cultural heritage, examines deterioration causes, discusses polymer usage for protecting bronze and stone monuments, and offers a look forward. The presentation was created for the Waterborne Symposium, New Orleans, La. March 1-4, 2011.

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2011 striegel waterborne presentation

  1. 1. Polymer Issues in Conservation and Preservation of Cultural Heritage<br />By Mary F. Striegel, <br />National Center for Preservation Technology and Training<br />
  2. 2. ===== Act I<br />
  3. 3. The objects that make up a portion of our cultural heritage have physical lives. <br />
  4. 4. Over time, they respond to their environments and break down from natural or manmade causes.<br />
  5. 5. NCPTT was created to develop or transfer new technologies to the world of historic preservation.<br />
  6. 6. NCPTT works with a variety of partners to advance preservation techniques.<br />
  7. 7. Without the ability to develop new improved coatings for use with cultural materials, many of these treasures will be lost. <br />
  8. 8. New technologies hold the promise of new ways to study and conserve our cultural heritage.<br />
  9. 9. We must engage interdisciplinary teams to apply new polymer systems can help preserve cultural objects for future generations.<br />
  10. 10. ===== Act II, Scene 1<br />
  11. 11. What is Cultural Heritage?<br />KellyMullaney, “Cultural Exhibits during Hispanic Heritage Family Day,” October 21, 2008, online image, flickr.<br />
  12. 12. Architectural buildings and structures. . .<br />
  13. 13. Archeological sites and collections. . .<br />
  14. 14. Art or historical collections. . .<br />
  15. 15. Parks, gardens and other landscapes can all be considered cultural heritage.<br />
  16. 16. Cultural Heritage can be internationally significant or highly personal.<br />
  17. 17. ===== Act II, Scene 2<br />
  18. 18. Cultural resources are subjected to many agents of deterioration. <br />
  19. 19. Natural decay goes unchecked from lack of understanding of chemical/physical properties.<br />
  20. 20. Decay is a result of complex factors that lead to loss of integrity.<br />
  21. 21. Air pollution interacts with stone to produce weathering products and accelerates decay.<br />
  22. 22. Subsequentrains wash away the stone resulting in a “melting” of outdoor sculpture. <br />
  23. 23. Metal Corrosion<br />
  24. 24. Moisture and Water<br />
  25. 25. Moisture and Water<br />
  26. 26. Biological Organisms<br />Grow in an amazing variety of environments<br />Micro-organisms can:<br />produce corrosive compounds<br />consume compounds that inhibit corrosion<br />The presence of biological organisms almost always increases corrosion rates in metals and deterioration rates in stone.<br />
  27. 27. Inherent vice <br />
  28. 28. Ethical Considerations<br /><ul><li>Do no harm
  29. 29. Respect and retain original material
  30. 30. Minimize impact
  31. 31. Understand treatments and materials used
  32. 32. Choose stable materials</li></li></ul><li>===== Act II, Scene 3<br />
  33. 33. Polymers Used in Conservation<br />
  34. 34. Anti-Corrosion Coatings<br />
  35. 35. Brush Application of a microcrystalline wax coating<br />
  36. 36.
  37. 37. Spray Application of an Incralac Coating<br />
  38. 38. Stone Consolidants<br />
  39. 39. Types of Stone Consolidants<br />Inorganic materials<br />Organic polymers<br />Alkoxysilanes<br />Conversion treatments<br />
  40. 40. Inorganic Materials<br />Alkali silicates<br />Calcium hydroxide<br />Barium hydroxide<br />Silicofluorides<br />
  41. 41. Organic Polymers<br />Acrylic<br />Epoxy<br />Polyurethane<br />
  42. 42. Alkoxysilanes<br />Ethyl silicate (TEOS) <br />Methyl trimethoxysilane<br />Methyl triethoxysilane<br />
  43. 43. HCT is a conversion treatment recently developed for calcareous substrates. Treatment converts calcium carbonate to a more stable mineral. <br />
  44. 44. Adhesives<br />
  45. 45. Surface Integrity<br />
  46. 46. Visual Appearance<br />
  47. 47. Retreatability or Reversibility<br />Viqi French, “Intense,” from Meeting of the Waters,<br />St. Louis, Mo. February 23, 2011,online image, flickr.<br />
  48. 48. Water Vapor Permeability<br />
  49. 49. VOC Regulations<br />
  50. 50. Calcareous Stone<br />Indiana Limestone<br />Vermont Marble<br />
  51. 51. Ideal Polymers…<br /><ul><li>Transparent color
  52. 52. Adds no gloss or sheen
  53. 53. Applies as a waterborne system
  54. 54. Stable under a variety of environmental conditions, including temperature cycling, and UV exposure and
  55. 55. Reversible or Retreatable</li></li></ul><li>===== Act III <br />
  56. 56. Current polymeric treatments are inadequate to protect our cultural heritage from decay.<br />
  57. 57. “…the need to build broad based partnerships between conservation scientists and scientists from universities, national laboratories, industry and other institutions...”CHEMISTRY AND MATERIALSRESEARCH AT THE INTERFACEBETWEEN SCIENCE AND ARTReport of a Workshop Cosponsored by theNational Science Foundation and the Andrew W. Mellon Foundation, July 6-7, 2009<br />
  58. 58. Engage interdisciplinary teams to apply new polymer systems that can help preserve cultural objects for future generations.<br />
  59. 59. Create collaboration and outreach through conferences, publications, and social media to bring together new teams and unique approaches.<br />
  60. 60. Create Sustained Funding efforts ... <br /><ul><li>NSF program solicitation 11-528
  61. 61. Full proposals due by May 11, 2011
  62. 62. Three year awards with funding up to $140,000 per year
  63. 63. Must have a recognized conservation scientist as part of the team</li></li></ul><li>2012 Preservation Technology and Training Grants<br /><ul><li>Annual Call for Proposals:</li></ul>September 2011<br /><ul><li>Deadline for Submission</li></ul>October 15, 2011<br /><ul><li>One Year Award Up to $25,000
  64. 64. Requires a 1 to 1 match
  65. 65. Simple online process
  66. 66. http://www.ncptt.nps.gov/grants/call-for-proposals-2011/</li></ul>Act III, Scene 4 – The Resolution<br />
  67. 67. Polymer scientists can play a crucial role in preserving our nation’s treasures.<br />

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