Mō te Cellulose
Ko te Cellulose he polysaccharide macromolecular i hangaia mai i te glucose. He nui te nui o tēnei matū i roto i ngā tipu matomato me ngā rauropi moana. Koinei te rauemi polymer taiao tino horapa me te nui rawa atu i roto i te taiao. He pai te hototahitanga ki te koiora, te whakahou me te pirau me ētahi atu painga. Mā te photosynthesis, ka taea e ngā tipu te hanga rau miriona tana o te cellulose i ia tau.
Ngā Huarahi mō te Whakamahinga Cellulose
Kua whakawhāitihia te whakamahinga whānui o te cellulose tuku iho nā ōna āhuatanga ā-tinana me te matū, engari he rerekē ngā āhuatanga mahi o te cellulose rauemi polymer tūturu i muri i te tukatuka me te whakarerekētanga, ka taea ai te whakatutuki i ngā hiahia rerekē o ngā momo ahumahi. Ko te whakamahinga mahi o ngā rauemi cellulose kua noho hei au whanaketanga taiao me ngā wāhi rangahau o ngā rauemi polymer.
Ka puta ngā matū whakaputanga cellulose mā te esterification, te etherification rānei o ngā rōpū hydroxyl i roto i ngā polymer cellulose me ngā matū tauhohenga. E ai ki ngā āhuatanga hanganga o ngā hua tauhohenga, ka taea te wehewehe i ngā matū whakaputanga cellulose ki ngā wāhanga e toru: ngā cellulose ether, ngā cellulose esters, me ngā cellulose ether esters.
1. Te etere cellulose
Ko te Cellulose ether he kupu whānui mō te raupapa o ngā matū cellulose i hangaia mā te tauhohenga o te cellulose alkali me te kaihoko etherifying i raro i ētahi tikanga. Ko te Cellulose ether he momo matū cellulose me ngā momo rerekē, he whānui ngā mara tono, he nui te rahinga whakaputa me te uara rangahau teitei. Ko tōna whakamahinga e uru ana ki ngā mara maha pēnei i te ahumahi, te ahuwhenua, te ahumahi matū o ia rā, te tiaki taiao, te rererangi me te tiaki whenua.
Ko ngā cellulose ethers e whakamahia ana mō te hokohoko ko: methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cyanoethyl cellulose, hydroxypropyl cellulose me te hydroxypropyl methylcellulose Cellulose me ētahi atu.
2. Te ester cellulose
E whakamahia whānuitia ana ngā hātetere cellulose i roto i ngā mara o te tiaki whenua, te ahumahi matū, te koiora, te rongoā, te hanga whare, tae noa ki te rererangi.
Ko ngā cellulose esters e whakamahia ana i te arumoni ko: te cellulose nitrate, te cellulose acetate, te cellulose acetate butyrate me te cellulose xanthate.
3. Te ester cellulose ether
He ranunga o ngā ester ether cellulose.
Mara tono：
1. Mara rongoā
E whakamahia whānuitia ana ngā hua o te cellulose ether me ngā ester i roto i te rongoā hei whakamātotoru, hei tāpiri, hei tukunga pumau, hei tukunga whakahaere, hei hanga kiriata me ētahi atu kaupapa.
2. Mara paninga
He mea tino nui te mahi a ngā cellulose esters i roto i ngā tono paninga.Ngā ester cellulosee whakamahia ana i roto i ngā here, i ngā kapia kua whakarerekētia, i ngā rauemi kiriata-mua rānei hei whakarato i ngā paninga me ngā āhuatanga tino pai.
3. Te mara hangarau membrane
He pai ngā painga o te cellulose me ngā rauemi i ahu mai i te cellulose, arā, he nui te putanga, he pumau te mahi, ā, he ngāwari hoki te hangarua. Mā te whakakotahitanga ā-papa-i-te-papa, te tikanga hurihanga ā-wāhanga, te hangarau hiko hurihuri me ētahi atu tikanga, ka taea te whakarite i ngā rauemi membrane he tino pai te mahi wehewehe. He whānui te whakamahinga o te hangarau membrane i roto i te ao hangarau.
4. Te rāngai hangahanga
He kaha rawa te kaha o ngā cellulose ethers ki te whakahurihuri i te wera, nō reira he pai hei tāpiri i roto i ngā wāhanga hanga, pērā i ngā tāpiringa piri taera i hangaia ki te sima.
5. Te rererangi, ngā waka pūngao hou me ngā taputapu hiko matatau
Ka taea te whakamahi i ngā rauemi optoelectronic mahi e hangai ana ki te cellulose i roto i te rererangi, i ngā waka pūngao hou me ngā taputapu hiko teitei.
Wā tuku: Paenga-whāwhā-25-2024