Chifukwa chiyani cellulose imatchedwa polima?

Cellulose, yomwe nthawi zambiri imatchedwa kuti chinthu chachilengedwe chochuluka kwambiri padziko lonse lapansi, ndi molekyu yosangalatsa komanso yovuta yomwe imakhudza kwambiri mbali zosiyanasiyana za moyo, kuyambira kapangidwe ka zomera mpaka kupanga mapepala ndi nsalu.

Kumvetsa chifukwa chakeselulosiPopeza ili m'gulu la polima, ndikofunikira kufufuza kapangidwe kake ka mamolekyu, kapangidwe kake, ndi khalidwe lomwe limawonetsa pamlingo waukulu komanso wocheperako. Mwa kuwunika bwino mbali izi, titha kufotokoza bwino momwe polima imagwirira ntchito mu cellulose.

Maziko a Chemistry ya Polymer:
Sayansi ya polima ndi nthambi ya chemistry yomwe imayang'ana kuphunzira ma macromolecules, omwe ndi mamolekyu akuluakulu opangidwa ndi mayunitsi obwerezabwereza otchedwa monomers. Njira ya polymerization imaphatikizapo kulumikizana kwa ma monomers awa kudzera mu ma covalent bonds, kupanga maunyolo aatali kapena ma network.

Kapangidwe ka Maselo a Cellulose:
Selose imapangidwa makamaka ndi maatomu a kaboni, haidrojeni, ndi okosijeni, okonzedwa mu mawonekedwe ofanana ndi unyolo. Chomangira chake chachikulu, molekyulu ya shuga, chimagwira ntchito ngati gawo la monomeric la polymerization ya cellulose. Gawo lililonse la shuga mkati mwa unyolo wa cellulose limalumikizidwa ku maulumikizano ena a glycosidic kudzera mu β(1→4), komwe magulu a hydroxyl (-OH) pa kaboni-1 ndi kaboni-4 a mayunitsi a shuga oyandikana nawo amakumana ndi ma condensation reaction kuti apange kulumikizana.

Mtundu wa Cellulose wa Polymeric:

Ma Units Obwerezabwereza: Ma β(1→4) glycosidic linkages mu cellulose amachititsa kuti ma unit a shuga abwerezedwenso pamodzi ndi unyolo wa polima. Kubwerezabwereza kumeneku kwa ma unit omangira ndi khalidwe lofunika kwambiri la ma polima.
Kulemera Kwambiri kwa Mamolekyulu: Mamolekyulu a cellulose amakhala ndi mayunitsi a shuga zikwizikwi mpaka mamiliyoni ambiri, zomwe zimapangitsa kuti pakhale kulemera kwakukulu kwa mamolekyulu komwe kumachitika ngati zinthu za polima.
Kapangidwe ka Unyolo Wautali: Kapangidwe ka mzere wa mayunitsi a shuga mu unyolo wa cellulose kamapanga unyolo wautali wa mamolekyu, wofanana ndi kapangidwe ka mawonekedwe ofanana ndi unyolo komwe kamapezeka mu ma polima.
Kuyanjana kwa Pakati pa Mamolekyulu: Mamolekyulu a cellulose amasonyeza mgwirizano wa pakati pa mamolekyulu a haidrojeni pakati pa maunyolo oyandikana, zomwe zimathandiza kupanga ma microfibrils ndi ma macroscopic, monga ulusi wa cellulose.
Kapangidwe ka Makina: Mphamvu ya makina ndi kulimba kwa cellulose, zomwe ndizofunikira pakupanga bwino makoma a maselo a zomera, zimagwirizanitsidwa ndi kapangidwe kake ka polima. Kapangidwe kameneka kamafanana ndi zinthu zina za polima.
Kuwola kwachilengedwe: Ngakhale kuti ndi kolimba, cellulose imatha kuwola, imawonongeka ndi ma enzymes ndi ma cellulases, omwe amathira hydrolyze kulumikizana kwa glycosidic pakati pa mayunitsi a shuga, pamapeto pake amaswa polima kukhala ma monomers ake.

Kugwiritsa Ntchito ndi Kufunika Kwake:
Chikhalidwe cha polimaselulosiImathandizira ntchito zake zosiyanasiyana m'mafakitale osiyanasiyana, kuphatikizapo mapepala ndi zamkati, nsalu, mankhwala, ndi mphamvu zongowonjezwdwanso. Zipangizo zopangidwa ndi cellulose zimayamikiridwa chifukwa cha kuchuluka kwake, kuwonongeka kwa zinthu, kusinthika, komanso kusinthasintha, zomwe zimapangitsa kuti zikhale zofunika kwambiri m'gulu lamakono.

Cellulose imayesedwa ngati polima chifukwa cha kapangidwe kake ka molekyulu, komwe kumaphatikizapo mayunitsi obwerezabwereza a shuga olumikizidwa ndi ma β(1→4) glycosidic bonds, zomwe zimapangitsa kuti pakhale maunyolo ataliatali okhala ndi kulemera kwakukulu kwa mamolekyulu. Chikhalidwe chake cha polima chimawonekera m'makhalidwe osiyanasiyana, kuphatikizapo kupangika kwa maunyolo otalikirapo a mamolekyulu, kuyanjana kwa mamolekyulu, mawonekedwe a makina, ndi kuwonongeka kwachilengedwe. Kumvetsetsa cellulose ngati polima ndikofunikira kwambiri pakugwiritsa ntchito ntchito zake zambiri ndikugwiritsa ntchito kuthekera kwake muukadaulo ndi zida zokhazikika.