Zokhudza Cellulose
Cellulose ndi polysaccharide yayikulu yopangidwa ndi shuga. Imapezeka kwambiri m'zomera zobiriwira ndi zamoyo zam'madzi. Ndi chinthu chachilengedwe chofala kwambiri komanso chachikulu kwambiri m'chilengedwe. Chili ndi biocompatibility yabwino, chosinthika komanso chosinthika komanso ubwino wina. Kudzera mu photosynthesis, zomera zimatha kupanga matani mazana ambiri a cellulose chaka chilichonse.
Mapeto Ogwiritsira Ntchito Cellulose
Cellulose yachikhalidwe yachepetsa kugwiritsidwa ntchito kwake kwakukulu chifukwa cha mphamvu zake zakuthupi ndi zamankhwala, pomwe cellulose yachilengedwe ya zinthu zopangidwa ndi polima ili ndi mphamvu zosiyanasiyana zogwirira ntchito pambuyo pokonza ndi kusintha, zomwe zimatha kukwaniritsa zosowa zosiyanasiyana za mafakitale osiyanasiyana. Kugwiritsa ntchito bwino zinthu zopangidwa ndi polima kwakhala njira yachilengedwe yopititsira patsogolo chitukuko ndi malo ofufuzira zinthu zopangidwa ndi polima.
Ma cellulose derivatives amapangidwa ndi esterification kapena etherification ya magulu a hydroxyl mu ma polymer a cellulose okhala ndi ma reagents a mankhwala. Malinga ndi mawonekedwe a kapangidwe ka zinthu zomwe zimachitika, ma cellulose derivatives amatha kugawidwa m'magulu atatu: cellulose ethers, cellulose esters, ndi cellulose ether esters.
1. Cellulose ether
Cellulose ether ndi dzina lathunthu la mndandanda wa zinthu zochokera ku cellulose zomwe zimapangidwa ndi momwe alkali cellulose imagwirira ntchito komanso zomwe zimapangitsa kuti zinthu zisamayende bwino pansi pa mikhalidwe ina. Cellulose ether ndi mtundu wa zinthu zochokera ku cellulose zomwe zimakhala ndi mitundu yosiyanasiyana, minda yogwiritsidwa ntchito kwambiri, kuchuluka kwa zinthu zomwe zimapangidwa komanso kufunika kofufuza kwambiri. Kugwiritsa ntchito kwake kumakhudza madera ambiri monga mafakitale, ulimi, makampani opanga mankhwala tsiku ndi tsiku, kuteteza chilengedwe, ndege ndi chitetezo cha dziko.
Ma cellulose ether omwe amagwiritsidwa ntchito m'malonda ndi awa: methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cyanoethyl cellulose, hydroxypropyl cellulose ndi hydroxypropyl methylcellulose Cellulose ndi zina zotero.
2. Cellulose ester
Ma ester a cellulose amagwiritsidwa ntchito kwambiri m'magawo a chitetezo cha dziko, makampani opanga mankhwala, zamoyo, zamankhwala, zomangamanga komanso ngakhale ndege.
Ma ester a cellulose omwe amagwiritsidwa ntchito m'malonda ndi awa: cellulose nitrate, cellulose acetate, cellulose acetate butyrate ndi cellulose xanthate.
3. Cellulose ester ester
Ma ester a cellulose ndi zinthu zosakanikirana zochokera ku ester-ether.
Munda wofunsira:
1. Munda wa mankhwala
Cellulose ether ndi ester derivatives zimagwiritsidwa ntchito kwambiri mu mankhwala pokulitsa, kukulitsa, kutulutsa kosalekeza, kutulutsa kolamulidwa, kupanga filimu ndi zina.
2. Munda wokutira
Ma ester a cellulose amagwira ntchito yofunika kwambiri pakuphimba.Ma ester a celluloseamagwiritsidwa ntchito mu zomangira, ma resins osinthidwa kapena zipangizo zomwe zisanapangidwe filimu kuti zipereke zokutira zokhala ndi zinthu zambiri zabwino kwambiri.
3. Gawo laukadaulo wa nembanemba
Zinthu zopangidwa ndi cellulose ndi zochokera kuzinthu zina zimakhala ndi ubwino wa kutulutsa kwakukulu, kugwira ntchito bwino, komanso kubwezeretsanso. Kudzera mu kudzipangira nokha, njira yosinthira gawo, ukadaulo wa electrospinning ndi njira zina, zinthu zopangidwa ndi nembanemba zomwe zili ndi magwiridwe antchito abwino kwambiri zitha kukonzedwa. Mu gawo la ukadaulo wa nembanemba zimagwiritsidwa ntchito kwambiri.
4. Gawo la zomangamanga
Ma ether a cellulose ali ndi mphamvu ya gel yosinthika kwambiri pa kutentha ndipo motero ndi othandiza ngati zowonjezera muzinthu zomangira, monga zowonjezera zomatira zopangidwa ndi simenti.
5. Ndege, magalimoto atsopano amphamvu ndi zipangizo zamagetsi zapamwamba
Zipangizo zamagetsi zogwira ntchito pogwiritsa ntchito cellulose zingagwiritsidwe ntchito mu ndege, magalimoto atsopano amphamvu komanso zipangizo zamagetsi zapamwamba.
Nthawi yotumizira: Epulo-25-2024