E uiga i le Cellulose
O le Cellulose o se polysaccharide macromolecular e aofia ai le glucose. E tele lona aofaʻi i laʻau lanumeamata ma meaola o le gataifale. O le mea polymer masani e sili ona salalau lautele ma sili ona tele i le natura. E lelei lona fetaui lelei i meaola, faʻafouina ma pala ma isi faʻamanuiaga. E ala i le photosynthesis, e mafai e laʻau ona faʻaputuina le selau miliona tone o le cellulose i tausaga taʻitasi.
Fa'amoemoega mo le Fa'aogaina o le Cellulose
Ua fa'atapula'aina le fa'aaogaina lautele o le cellulose masani ona o ona uiga fa'aletino ma fa'akemikolo, ae o le cellulose o le mea polymer masani e iai ona uiga fa'atino eseese pe a uma ona fa'agasolo ma fa'aleleia, lea e mafai ona fa'afetaui ai mana'oga eseese o pisinisi eseese. O le fa'aaogaina lelei o mea fa'atino o le cellulose ua avea ma aga masani o le atina'eina ma su'esu'ega o mea polymer.
E maua mai i le cellulose derivatives e ala i le esterification po'o le etherification o hydroxyl groups i totonu o cellulose polymers fa'atasi ai ma vaila'au fa'akemikolo. E tusa ai ma uiga fa'atulagaina o oloa o le tali atu, e mafai ona vaevaeina i ni vaega se tolu ia cellulose derivatives: cellulose ethers, cellulose esters, ma cellulose ether esters.
1. Cellulose ether
O le Cellulose ether o se faaupuga lautele mo se faasologa o mea e maua mai i le cellulose e fausia e ala i le tali atu o le alkali cellulose ma le etherifying agent i lalo o nisi o tulaga. O le Cellulose ether o se ituaiga o mea e maua mai i le cellulose e eseese ituaiga, e lautele le faaaogaina, tele le gaosiga ma maualuga le taua o suesuega. O lona faaaogaina e aofia ai le tele o vaega e pei o alamanuia, faatoaga, alamanuia o vailaau i aso taitasi, puipuiga o le siosiomaga, vaalele ma le puipuiga o le atunuu.
O le cellulose ethers o loʻo faʻaaogaina faapisinisi o: methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cyanoethyl cellulose, hydroxypropyl cellulose ma le hydroxypropyl methylcellulose Cellulose ma isi.
2. Cellulose ester
E faʻaaogaina lautele le cellulose esters i matāʻupu o le puipuiga a le atunuʻu, alamanuia o vailaʻau, paiolo, vailaʻau faufale, faufale ma e oʻo lava i le ea.
O cellulose esters o loʻo faʻaaogaina faapisinisi o: cellulose nitrate, cellulose acetate, cellulose acetate butyrate ma le cellulose xanthate.
3. Ester o le cellulose ether
O cellulose ether esters o ni mea e maua mai i le ester ma le ether.
Fanua talosaga：
1. Matāgaluega o vailaʻau
E fa'aaogaina lautele le cellulose ether ma ester derivatives i vaila'au mo le fa'amafiafiaina, fa'aopoopoga i mea fa'aopoopo, fa'asa'olotoina faifai pea, fa'asa'olotoina fa'atonutonuina, faia o ata tifaga ma isi fa'amoemoega.
2. Fanua ufiufi
E tāua tele le sao o cellulose esters i le fa'aogaina o vali.Esters cellulosee fa'aaogaina i mea e fa'apipi'i ai, resins ua fa'aleleia pe i mea e fai muamua ma ata tifaga e maua ai ni ufiufi e tele ona uiga lelei.
3. Matāgaluega o tekinolosi membrane
O le cellulose ma mea e maua mai ai e iai ona lelei o le tele o le gaosiga, le mautu o le faatinoga, ma le mafai ona toe faʻaaogaina. E ala i le faʻapotopotoina o vaega taʻitasi, le metotia o le faʻaliliuina o vaega, tekinolosi electrospinning ma isi auala, e mafai ona saunia ai mea membrane e sili ona lelei le faʻatinoina o le vavaeʻeseina. I le matata o tekinolosi membrane e faʻaaogaina lautele.
4. Vaega o le fausiaina
E maualuga le malosi o le gel e fa'afesuia'i i le vevela ma e aoga tele e fai ma fa'aopoopoga i vaega faufale, e pei o fa'aopoopoga i le kelu ta'ele e fa'avae i le sima.
5. Vaalele, taavale eletise fou ma masini eletise maualuluga
E mafai ona faʻaaogaina mea optoelectronic galue e faʻavae i le cellulose i vaalele, taʻavale eletise fou ma masini eletise maualuluga.
Taimi na lafoina ai: Aperila-25-2024