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363170

Sigma-Aldrich

聚乙烯醇

Poly(vinyl alcohol)

Mw 13,000-23,000, 87-89% hydrolyzed

同義詞:

PVA

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About This Item

線性公式:
[-CH2CHOH-]n
CAS號碼:
9002-89-5
MDL號碼:
MFCD00081922
分類程式碼代碼:
12352104
NACRES:
NA.23
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品質等級

200

形狀

crystalline powder
crystals or granules
powder

分子量

Mw 13,000-23,000

降落球

3.5-4.5 cP, 4 % in H2O(20 °C)(lit.)

InChI

1S/C2H4O/c1-2-3/h2-3H,1H2

InChI 密鑰

IMROMDMJAWUWLK-UHFFFAOYSA-N

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相關類別

一般說明

聚乙烯醇（PVA）是一种线性亲水合成树脂，具有单斜晶体结构。它可以通过乙烯基酯或醚的聚合和之后的皂化或酯交换反应来合成。由于其良好的物理和化学性质， PVA 被广泛应用于粘合剂、纤维、造纸行业、药物递送和组织工程。

應用

PVA 用作生物试剂，以测试氧化锌纳米颗粒的分散。[1]PVA 已被评估为有效的抗蛋白质材料。2 它可用于稳定直径 3-8nm 的金胶体。[2]
聚乙烯醇可用作合成介孔沸石的辅助模板。

它可用于制备水凝胶模板以生产缓释给药的均质微颗粒。由于其高抗张强度和弹性，PVA可用作微颗粒制备中的稳定剂。

特點和優勢

  • 良好的机械和化学 稳定性
  • 无毒
  • 亲水性可调节
  • 耐溶剂性 可形成薄膜

儲存類別代碼

11 - Combustible Solids

水污染物質分類（WGK）

WGK 1

閃點（°F）

No data available

閃點（°C）

No data available

個人防護裝備

Eyeshields, Gloves, type N95 (US)

從最近期的版本中選擇一個：

分析證明 (COA)

Lot/Batch Number
MKCX1154
WXBF4051V
MKCR6863
MKCQ4225
MKCP7953

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存取文件庫

Gold colloidal nanoparticles sized to be suitable precursors for heterogeneous catalysts
Porta F and Prati L
Metal Nanoclusters in Catalysis and Materials Science: The Issue of Size Control, 355-355 (2008)
Zinc oxide nanoparticles as selective killers of proliferating cells.
Taccola L, et al.
International journal of nanomedicine, 6, 1129-1140 (2010)
Nadège Grabowski et al.
International journal of pharmaceutics, 454(2), 686-694 (2013-06-12)
In vitro cytotoxicity and inflammatory response following exposure to nanoparticles (NPs) made of poly(lactide-co-glycolide) (PLGA) have been investigated on A549 human lung epithelial cells. Three different PLGA NPs (230 nm) were obtained using different stabilizers (polyvinyl alcohol, chitosan, or Pluronic(®)
E Fortunati et al.
Carbohydrate polymers, 97(2), 837-848 (2013-08-06)
Cellulose nanocrystals (CNC) extracted from three different sources, namely flax, phormium, and commercial microcrystalline cellulose (MCC) have been used in a polyvinyl alcohol (PVA) matrix to produce anti-bacterial films using two different amounts of silver nanoparticles (0.1 wt% and 0.5
E Fortunati et al.
Carbohydrate polymers, 97(2), 825-836 (2013-08-06)
PVA bio-nanocomposites reinforced with cellulose nanocrystals (CNC) extracted from commercial microcrystalline cellulose (MCC) and from two types of natural fibres, Phormium tenax and Flax of the Belinka variety, were produced by solvent casting in water. Morphological, thermal, mechanical and transparency
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Questions

1–3 of 3 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  3. Do you have any data indicating an expected range of particle size for PVA, Poly(vinyl alcohol), products 363170 and 363138 (CAS 9002-89-5)?

    1 answer

    1. The particle size is an internal specification, and there are no external specifications beyond the internal “S” grade. Internally, the focus is on ensuring there are no excessive quantities of fines (<100 Mesh) or excessive large particles (>14 Mesh). These internal requirements do not vary between the two products listed.

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