Focus on Cellulose ethers

Celulosics ke eng?

Celulosics ke eng?

Li-cellulosics li bua ka sehlopha sa lisebelisoa tse nkiloeng ho selulose, e leng polymer e ngata ka ho fetisisa lefatšeng le karolo e kholo ea marako a lisele tsa semela.Cellulose ke polysaccharide e melang e entsoeng ka likaroloana tse pheta-phetoang tsa tsoekere tse hokahantsoeng ka libonto tsa β(1→4) tsa glycosidic.

Lisebelisoa tsa cellulosic li ka aroloa ka bongata ka mekhahlelo e 'meli: ea tlhaho le ea maiketsetso.

Li-Celluloses tsa Tlhaho:

  1. Wood Pulp: E tsoa ho likhoele tsa lehong, makhasi a lehong ke mohloli o ka sehloohong oa selulose o sebelisoang liindastering tse fapaneng, ho kenyelletsa ho etsa pampiri, masela le kaho.
  2. K’hothone: Likhoele tsa k’hothone, tse fumanoang boea ba peō ea semela sa k’hothone, li na le hoo e ka bang ka ho feletseng ka selulose.K'hothone e sebelisoa haholo tlhahisong ea masela ka lebaka la bonolo ba eona, ho hema le ho monya.
  3. Hemp: Litlhare tsa Hemp, tse ntšitsoeng kutung ea semela sa hemp, li na le cellulose 'me li sebelisoa masela, ho etsa pampiri, le lisebelisoa tse kopantsoeng.
  4. Bamboo: Lithapo tsa bamboo, tse tsoang makhasing a limela tsa bamboo, li na le selulose e ngata 'me li sebelisoa ho etsa masela, hammoho le ho hlahisa pampiri le thepa ea mohaho.

Synthetic Celluloses:

  1. Regenerated Cellulose: E hlahisoa ka ho qhibiliha ha selulose ka har'a motsoako, joalo ka cuprammonium hydroxide kapa viscose, e lateloa ke extrusion ka bateng ea coagulation.Lisebelisoa tsa cellulose tse nchafalitsoeng li kenyelletsa viscose rayon, lyocell (Tencel), le cellulose acetate.
  2. Cellulose Esters: Lintho tse nkiloeng ho cellulose tse fetotsoeng ka lik'hemik'hale tse fumanoeng ka karabelo ea esterification ka li-acid tse fapaneng.Li-ester tse tloaelehileng tsa cellulose li kenyelletsa cellulose acetate, cellulose nitrate (celluloid), le cellulose acetate butyrate.Lisebelisoa tsena li sebelisoa tlhahisong ea lifilimi, likoahelo le polasetiki.

Lisebelisoa tsa Cellulose:

  1. Masela: Lithapo tsa cellulosic, ka bobeli tsa tlhaho (mohlala, k'hothone, hemp) le tse nchafalitsoeng (mohlala, viscose rayon, lyocell), li sebelisoa haholo tlhahiso ea masela bakeng sa liaparo, masela a ntlo le masela a indasteri.
  2. Lipampiri le Liphutheloana: Lithako tsa lehong, tse nkiloeng mehloling ea cellulosic, li sebetsa e le thepa ea mantlha ea ho etsa pampiri le thepa ea ho paka.Lithapo tsa cellulosic li fana ka matla, ho monya le ho hatisa lihlahisoa tsa pampiri.
  3. Lisebelisoa tsa Kaho: Lisebelisoa tsa cellulosic, joalo ka lehong le bamboo, li sebelisoa kahong bakeng sa likarolo tsa sebopeho (mohlala, ho etsa liforeimi tsa mapolanka, plywood) le likhabiso tse khabisitsoeng (mohlala, fatše lehong le thata, liphanele tsa bamboo).
  4. Lihlahisoa tsa Tlhokomelo ea Botho: Lisebelisoa tse thehiloeng ho cellulose li sebelisoa lihlahisoa tsa tlhokomelo ea motho ka mong, ho kenyeletsoa lihlapi, li-tissue le lihlahisoa tsa bohloeki tse monyang ka lebaka la bonolo, matla le biodegradability.
  5. Lijo le Meriana: Li-derivatives tsa cellulose, tse kang microcrystalline cellulose le carboxymethylcellulose, li sebelisoa e le li-excipients lijong le metsoako ea meriana bakeng sa ho tiisa, ho tsitsisa le ho tlama.

Melemo ea Celulosics:

  1. E ka tsosolosoa hape e ka senyeha: Lisebelisoa tsa cellulosic li tsoa mehloling ea limela tse nchafalitsoeng 'me li ka senyeha, li etsa hore e be mekhoa e tsitsitseng ea tikoloho ho li-polymers tsa maiketsetso.
  2. Mefuta-futa: Li-cellulosics li bonts'a mefuta e mengata e fapaneng ea mesebetsi le ts'ebetso, e lumellang lits'ebetso tse fapaneng ho pholletsa le liindasteri, ho tloha ho masela ho isa ho tsa meriana.
  3. Ho fumaneha: Cellulose e ngata ka tlhaho, ka mehloli e tsoang ho patsi le k'hothone ho ea ho bamboo le hemp, e netefatsang phepelo e tsitsitseng le e tšepahalang bakeng sa tšebeliso ea indasteri.
  4. Biocompatibility: Lisebelisoa tse ngata tsa cellulosic lia lumellana ebile ha li chefo, li etsa hore li tšoanelehe ho sebelisoa lijong, meriana le lits'ebetsong tsa bongaka.

Ka bokhutšoanyane, li-cellulosics li kenyelletsa mefuta e fapaneng ea lisebelisoa tse nkiloeng ho selulose, tse fanang ka ts'ebetso e fapaneng, e tsitsitseng, le biocompatibility mefuteng e mengata ea lits'ebetso liindastering tse kang masela, ho etsa pampiri, kaho, tlhokomelo ea motho ka mong le tlhokomelo ea bophelo bo botle.


Nako ea poso: Feb-27-2024
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