Kusintha kwa cellulose

01. Kuyambitsa kwa Cellulose

Cellulose ndi ma a Macrorolecular polysardide yopangidwa ndi glucose. Zopanda madzi m'madzi ndi General Ardic solsnts. Ndi gawo lalikulu la khoma la cell, ndipo ndi gawo logawidwa kwambiri komanso la polysacharide kwambiri mwachilengedwe.

Cellulose ndiye gawo lochulukirapo padziko lapansi, ndipo ndi polymer yachilengedwe yomwe ili ndi kuchuluka kwakukulu. Ili ndi zabwino zokonzedwanso, zoyenereradi, komanso zopanda pake.

02. Zifukwa zosintha cellulose

Cellulose Macromolecles muli magulu ambiri a -o. Chifukwa cha zomangira za hydrogen, mphamvu pakati pa macromolecles ndi yayikulu, yomwe idzatsogolera kutchuka kwambiri △ H; Komabe, pali mphete mu celromole macromolecles. Monga kapangidwe kake, kuthamanga kwa mabataniwo ndikokulirapo, komwe kumayambitsa kusintha kokhazikika kwa Δs. Zifukwa ziwirizi zimapanga kutentha kwa cellulose (= △ h / △ s) zidzakhala zokwezeka, komanso kutentha kwa cellulose kumakhala kochepa kwambiri. Chifukwa chake, pamene cellulose imatha kutentha ena, ulusi udzawonekera kuti Cellulose idayamba isanayambe kusungunuka zisanayambe kusungunuka, zida za zida za cellulose sizingatengere njira yofukizira kenako.

03. Kutanthauza kusintha kwa cellulose

Ndi kuchotsera pang'onopang'ono kwa zinthu zakale zopangidwa ndi zinthu zachilengedwe zomwe zimayambitsidwa ndi zinyalala zamatambo, kukula ndi kugwiritsa ntchito zida zachilengedwe zosinthidwa zakhala imodzi mwa malo otentha omwe anthu amasamala. Cellulose ndiye kuchuluka kwachuma kwambiri zachilengedwe zachilengedwe. Ili ndi chinthu chabwino kwambiri monga hygroscopicity yabwino, ma antistatic, mpweya wolimba, waumtima, wopatsa ubwino, wovala bwino, wosavuta kusunga mawu osavuta, komanso biodegradiyition. Ili ndi mikhalidwe yomwe siyingafanane ndi matenda a mankhwala. .

Cellulose mamolekyulu ambiri ma hydroxyl, omwe ndi osavuta kupanga ma intramolecular ndi ma hydrogen hydrogen, ndikuwola kutentha kwambiri popanda kusungunuka. Komabe, cellulose ili ndi kukhazikitsidwa kwabwino, ndipo hyrogen yake imatha kuwonongedwa ndi kusintha kwa mankhwala kapena kutsatsa zinthu, zomwe zimatha kutsika bwino. Monga zinthu zosiyanasiyana za mafakitale, zimagwiritsidwa ntchito kwambiri m'malemba, kupatukana kwa membrane, plactics, fodya ndi zokutira.

04. Kusintha kwa cellulose

Cellulose ether ndi mtundu wa cellulose yochokera pakusintha kwa ma cellulose. Amagwiritsidwa ntchito kwambiri chifukwa cha kukula kwake kwambiri, emulsization, kuyimitsidwa, mapangidwe apamaviefilimu, kuteteza colloid, chinyezi choteteza, ndi chotsatsa. Amagwiritsidwa ntchito mu chakudya, mankhwala, kupanga mapepala, utoto, zomangira, etc.

Kusintha kwa cellulose ndi njira zingapo zomwe zimapangidwa ndi magulu a hydroxyl pa cellulose molecular unyolo wokhala ndi othandizira a alkalinine. Magulu a hydroxyl amachepetsa kuchuluka kwa ma hydmoleclal hydrogeni kuti muchepetse magulu am'madzi, potero amatha kusintha matenthedwe a cellulose, kukonza magwiridwe antchito, ndipo nthawi yomweyo amachepetsa malo osungunuka a cellulose.

Zitsanzo za Zotsatira Zosintha Kusintha Kwazogwira Ntchito Zina kwa Cellulose:

Kugwiritsa ntchito thonje loyenga bwino ngati zinthu zoyambira, ofufuzawo adagwiritsa ntchito njira imodzi yokonzekeretsa carboxymethyl hydroxpyl cell cellulose, kukana kwa acid, kukana kutentha. Kugwiritsa ntchito njira imodzi yoyeserera imodzi, ma carboxymethyl hydroxypyl ali ndi mchere wotsutsana ndi mchere, kukana kwa acid ndi kusungunuka. Posintha chiwerengero cha Propeyne oxide ndi chloroceic asidi, zinthu zomwe zimapangidwa ndi carboxymethyl ndi hydroxypropyl zomwe zingakukonzekere. Zotsatira zoyeserera zikuwonetsa kuti carboxymethyl hydroxpyl cellulose yopangidwa ndi njira yayifupi, zosungunulira zotsika kwambiri, ndipo malonda ali ndi vuto la acid ndi kukana kwa acid.

05. Chiyembekezo cha kusintha kwa cellulose

Cellulose ndi chinthu chofunikira cha mankhwala ndi mankhwala omwe ali ndi zinthu zambiri, zobiriwira komanso zowoneka bwino, komanso zotheka. Zosasinthika za kusintha kwa cellulose kukhala ndi luso labwino kwambiri, kugwiritsa ntchito mitundu yambiri komanso kugwiritsa ntchito zovuta zambiri, ndikukwaniritsa zosowa zachuma padziko lonse. Ndipo zosowa za chitukuko cha chikhalidwe, ndikutha kwaukadaulo ndikuzindikira malonda m'tsogolo, ngati zopangira zopangidwa ndi zopangidwazo ndi njira zopangira cellulose zitha kukhala zotukuka kwambiri, zimagwiritsidwa ntchito mokwanira ndikuzindikira ntchito zambiri . Peza mtengo