Focus on Cellulose ethers

Kodi cellulosics ndi chiyani?

Kodi cellulosics ndi chiyani?

Ma celluloses amatanthauza gulu la zinthu zomwe zimachokera ku cellulose, yomwe ndi polima yochuluka kwambiri padziko lapansi komanso gawo lalikulu la makoma a cellulose.Cellulose ndi mzere wa polysaccharide wopangidwa ndi mayunitsi a shuga obwerezabwereza olumikizidwa pamodzi ndi β(1→4) glycosidic bond.

Zipangizo za cellulozic zitha kugawidwa m'magulu awiri: zachilengedwe komanso zopangidwa.

Natural Celulosics:

  1. Wood Pulp: Zochokera ku ulusi wamatabwa, zamkati zamatabwa ndizomwe zimayambira pa cellulose zomwe zimagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuphatikiza kupanga mapepala, nsalu, ndi zomangamanga.
  2. Thonje: Ulusi wa thonje, wotengedwa ku njere za mbewu za thonje, umakhala pafupifupi wa cellulose.Thonje amagwiritsidwa ntchito kwambiri popanga nsalu chifukwa cha kufewa kwake, kupuma kwake, komanso kuyamwa kwake.
  3. Hemp: Ulusi wa hemp, wotengedwa ku tsinde la hemp, uli ndi cellulose ndipo amagwiritsidwa ntchito mu nsalu, kupanga mapepala, ndi zinthu zophatikizika.
  4. nsungwi: Ulusi wa nsungwi, wotengedwa m’mitengo ya nsungwi, uli ndi cellulose wambiri ndipo umagwiritsidwa ntchito popanga nsalu, komanso kupanga mapepala ndi zomangira.

Synthetic Celulosics:

  1. Ma cellulose Opangidwanso: Amapangidwa kudzera pakusungunuka kwa cellulose mu zosungunulira, monga cuprammonium hydroxide kapena viscose, kenako ndikutulutsa mu bafa yolumikizana.Zida zopangidwanso zama cellulose zimaphatikizapo viscose rayon, lyocell (Tencel), ndi cellulose acetate.
  2. Ma cellulose Esters: Ma cellulose osinthidwa amapangidwa ndi ma esterification amitundu yosiyanasiyana.Ma cellulose esters ambiri amaphatikizapo cellulose acetate, cellulose nitrate (celluloid), ndi cellulose acetate butyrate.Zidazi zimagwiritsidwa ntchito popanga mafilimu, zokutira, ndi mapulasitiki.

Kugwiritsa ntchito Cellulosic:

  1. Zovala: Ulusi wa cellulosic, wachilengedwe (monga thonje, hemp) ndi wopangidwanso (monga viscose rayon, lyocell), amagwiritsidwa ntchito kwambiri popanga nsalu popanga zovala, nsalu zapakhomo, ndi nsalu zamakampani.
  2. Mapepala ndi Kuyika: Zamkati zamatabwa, zochokera ku ma cellulosic, zimakhala ngati zopangira zopangira mapepala ndi zoyikapo.Ma cellulosic fibers amapereka mphamvu, absorbency, ndi kusindikiza kwa mapepala.
  3. Zida Zomangira: Zipangizo zama cellulosic, monga matabwa ndi nsungwi, zimagwiritsidwa ntchito pomanga pomanga (monga matabwa, plywood) ndi zomaliza zokongoletsa (mwachitsanzo, matabwa olimba, mapanelo ansungwi).
  4. Zopangira Zosamalira Munthu: Zida zopangidwa ndi ma cellulose zimagwiritsidwa ntchito pazinthu zosamalira anthu, kuphatikiza zopukuta, minofu, ndi zinthu zaukhondo zomwe zimayamwa, chifukwa cha kufewa kwawo, mphamvu, ndi kuwonongeka kwawo.
  5. Chakudya ndi Mankhwala: Zotengera za cellulose, monga microcrystalline cellulose ndi carboxymethylcellulose, zimagwiritsidwa ntchito ngati zowonjezera muzakudya ndi mankhwala opangira mankhwala chifukwa chakukula kwawo, kukhazikika, komanso kumangirira.

Ubwino wa Celulosics:

  1. Zongowonjezwdwa ndi Biodegradable: Zipangizo ma cellulosic zimachokera ku zongowonjezwdwa zomera magwero ndi biodegradable, kuwapanga zachilengedwe zisathe m'malo mwa kupanga ma polima.
  2. Kusinthasintha: Ma cellulosics amawonetsa zinthu zambiri komanso magwiridwe antchito osiyanasiyana, kulola kugwiritsa ntchito mosiyanasiyana m'mafakitale, kuchokera ku nsalu mpaka kumankhwala.
  3. Kupezeka: Ma cellulose ndi ochuluka mwachilengedwe, okhala ndi magwero kuyambira matabwa ndi thonje mpaka nsungwi ndi hemp, kuwonetsetsa kuti pakhale kupezeka kosasintha komanso kodalirika kwa mafakitale.
  4. Biocompatibility: Zida zambiri zama cellulosic ndizogwirizana komanso sizikhala ndi poizoni, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pazakudya, zamankhwala, ndi zamankhwala.

Mwachidule, ma cellulosics amaphatikiza zinthu zosiyanasiyana zochokera ku cellulose, zomwe zimapereka kusinthasintha, kukhazikika, komanso kuyanjana kwazinthu zosiyanasiyana m'mafakitale monga nsalu, kupanga mapepala, zomangamanga, chisamaliro chamunthu, komanso chisamaliro chaumoyo.


Nthawi yotumiza: Feb-27-2024
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