Polyvinyl ava malosi PVA

O le Polyvinyl alcohol (PVA) o se polymer synthetic e maua mai le vinyl acetate e ala i le polymerization ma mulimuli ane hydrolysis. O se polymer solu vai ma le tele o faʻaoga ona o ona uiga faʻapitoa. Sei o tatou suʻesuʻeina nisi o vaega taua o le polyvinyl alcohol:

1. Fa'atonuga o vaila'au: O le Polyvinyl alcohol o lo'o fa'aalia i se iunite toe fai o vinyl alcohol monomers. E so'o'i fa'atasi le iunite o le 'ava malosi e ala i fusi fa'atasi carbon-carbon, e fai ai se filifili polymer laina. Ae ui i lea, o le vinyl alcohol mama e le mautu, o lea e masani ona gaosia le polyvinyl alcohol e le hydrolysis o le polyvinyl acetate, lea e suia ai nisi o vaega acetate i vaega hydroxyl.

2. Meatotino:

• Suavai Solubility: O se tasi o meatotino sili ona taua o le PVA o lona solubility maualuga vai. E fa'amuta i totonu o le vai e fai ai ni vaifofo manino ma le viscous, ma fa'atatau mo fa'aoga eseese o lo'o mana'omia ai le fa'avae vai.
• Ata-Fai Ata: E mafai e le PVA ona fai ata tifaga manino, fetuutuunai pe a lafo mai lona vai vai. O nei ata tifaga o loʻo i ai le malosi faʻainisinia lelei, mea faʻapipiʻi, ma le pipii i substrates, e faʻaogaina ai i latou i faʻaoga e pei o paʻu, faʻapipiʻi, ma mea faʻapipiʻi.
• Biocompatibility: O le PVA e masani ona manatu o le biocompatible ma e le oona, e talafeagai mo le faʻaogaina i le tele o mea faʻafomaʻi ma vailaʻau, e pei o le tuʻuina atu o vailaʻau, faʻaofuina manuʻa, ma fata faʻainisinia.
• Mauaina Vailaau: PVA o loʻo faʻaalia lelei le mautu o vailaʻau, tetee atu i le faʻaleagaina e acids, faʻavae, ma solvents organic i lalo o tulaga masani. Ae ui i lea, e mafai ona faʻafefe i le hydrolysis i lalo o tulaga oona poʻo alkaline, e mafua ai le leiloa o mea totino.

3. Talosaga: Polyvinyl alcohol o lo'o i ai le tele o fa'aoga i totonu o pisinisi eseese:

• Faʻapipiʻi: O faʻapipiʻi faʻavae PVA e faʻaaogaina lautele i fafie, faʻapipiʻi pepa, ma oloa faʻatau ona o lo latou pipii lelei, faʻafefe vai, ma faigofie faʻaoga.
• Ie: O filo PVA e faʻaaogaina i mea faʻapipiʻi e tuʻuina atu ai le malosi, teteʻe o le abrasion, ma le mautu o le ie.
• Fa'apipi'i: O ata fa'avae PVA o lo'o fa'aaogaina e fai ma mea fa'apipi'i mo mea'ai, vaila'au, ma isi oloa ona o a latou pa puipui ma biodegradability.
• Fa'apipi'i Pepa: Fa'apipi'i fa'apipi'i PVA e fa'aoga i pepa ma pepa pepa e fa'aleleia atili ai le lamolemole, lolomi, ma le susu.
• Fausiaina: O faʻavae faʻavae PVA o loʻo faʻaaogaina i mea faufale e pei o sima faʻafefiloi, mea faʻapipiʻi faʻapipiʻi, ma suiga o le sima e faʻaleleia ai le galue, pipii, ma le tumau.

4. Manatu Fa'alesiosiomaga: E ui o le polyvinyl alcohol e mafai ona fa'aleagaina i lalo o nisi tulaga, o lona fa'aogaina lautele ma le lafoai e mafai lava ona iai ni a'afiaga o le si'osi'omaga. O le fa'aleagaina o le PVA e masani lava ona tupu e ala i gaioiga microbial i si'osi'omaga aerobic, e pei o fale fa'apala'au po'o fale e fa'amama otaota. Ae peita'i, i si'osi'omaga anaerobic, e pei o lapisi, e ono tumau pea le PVA mo se vaitaimi umi. O lo'o fa'aauau pea taumafaiga e atia'e isi mea e mafai ona fa'aleagaina pe fa'afouina i fa'aputuga masani a le PVA e fa'aitiitia ai nei popolega tau le si'osi'omaga.

I le aotelega, o le polyvinyl alcohol (PVA) o se polymer faʻapitoa ma le tele o faʻaoga ona o lona soluble vai, ata-fausia gafatia, biocompatibility, ma le mautu vailaʻau. O lona fa'aogaina e fa'asolo atu i alamanuia e pei o mea fa'apipi'i, ie, afifiina, pa'u pepa, ma mea faufale. A'o ofoina atu e le PVA le tele o mea lelei, o iloiloga o le si'osi'omaga ma taumafaiga e atia'e auala gafataulimaina o mea taua ia i lona fa'aauau ona fa'aoga ma atina'e.