Hoʻokumu Kemika a me ka mea hana o nā Cellulose Ethers

ʻO nā cellulose ethers kahi papa o nā pūhui i hoʻohana nui ʻia i nā ʻoihana like ʻole, me ke kūkulu ʻana, nā meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino. Loaʻa kēia mau pūhui mai ka cellulose, he polymer maoli i loaʻa i nā mea kanu, a hana ʻia ma o ke kaʻina hana hoʻololi kemika. Ma kēia ʻatikala, e kūkākūkā mākou i ke ʻano kemika o nā cellulose ethers a me kekahi o nā mea hana nui o kēia mau pūhui.

ʻO ke kinona o ka Cellulose Ethers:

Loaʻa nā cellulose ethers mai ka cellulose, kahi polymer linear i haku ʻia me nā ʻāpana glucose i hoʻopili ʻia e nā paʻa beta-1,4 glycosidic. Hōʻike ʻia ka ʻāpana hou o cellulose ma lalo nei:

ʻO ka hoʻololi kemika o cellulose e hana i nā cellulose ethers e pili ana i ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui hana ʻē aʻe. ʻO nā pūʻulu hana maʻamau no kēia kumu ʻo ia ka methyl, ethyl, hydroxyethyl, hydroxypropyl, a me carboxymethyl.

Methyl Cellulose (MC):

ʻO ka Methyl cellulose (MC) he cellulose ether i hana ʻia e ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui methyl. Hiki ke ʻokoʻa ke degere o ka hoʻololi ʻana (DS) o MC mai ka 0.3 a i ka 2.5, ma muli o ka noi. ʻO ke kaumaha molekala o MC ka mea maʻamau ma waena o 10,000 a 1,000,000 Da.

ʻO ka MC he pauka keʻokeʻo a keʻokeʻo, ʻaʻala ʻole a ʻono ʻole i hiki ke hoʻoheheʻe ʻia i ka wai a me ka hapa nui o nā mea hoʻoheheʻe kūlohelohe. Hoʻohana maʻamau ia ma ke ʻano he mānoanoa, binder, a emulsifier i nā ʻoihana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino. I ka ʻoihana kūkulu, hoʻohana ʻia ʻo MC ma ke ʻano he mea hoʻohui i nā huahana sima e hoʻomaikaʻi i ka hana, paʻa wai, a me ka ikaika adhesive.

Ethyl Cellulose (EC):

ʻO Ethyl cellulose (EC) he cellulose ether i hana ʻia e ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui ethyl. Hiki ke ʻokoʻa ka degere o ka hoʻololi ʻana (DS) o EC mai 1.5 a i 3.0, ma muli o ka noi. ʻO ke kaumaha molekala o EC ka mea maʻamau ma waena o 50,000 a 1,000,000 Da.

ʻO EC he pauda keʻokeʻo a keʻokeʻo, ʻono ʻole a ʻono ʻole i hiki ʻole ke hoʻoheheʻe ʻia i ka wai akā hiki ke hoʻoheheʻe ʻia i ka hapa nui o nā mea hoʻoheheʻe organik. Hoʻohana mau ʻia ʻo ia ma ke ʻano he mea hoʻopaʻa, kiʻiʻoniʻoni-mua, a hoʻokuʻu mau ʻia i ka ʻoihana lāʻau lapaʻau. Eia kekahi, hiki ke hoʻohana ʻia ʻo EC i mea uhi no ka meaʻai a me nā huahana lāʻau lapaʻau e hoʻomaikaʻi ai i ko lākou kūpaʻa a me ke ʻano.

Hydroxyethyl Cellulose (HEC):

ʻO ka Hydroxyethyl cellulose (HEC) he cellulose ether i hana ʻia e ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui hydroxyethyl. Hiki ke ʻokoʻa ka pae o ka hoʻololi ʻana (DS) o HEC mai 1.5 a i 2.5, ma muli o ka noi. ʻO ke kaumaha molekala o HEC maʻamau ma ka laulā o 50,000 a 1,000,000 Da.

He pauda keʻokeʻo ʻo HEC a i ʻole keʻokeʻo, ʻala ʻole a ʻono ʻole i hiki ke hoʻoheheʻe ʻia i ka wai a me ka hapa nui o nā mea hoʻoheheʻe organik. Hoʻohana maʻamau ia e like me ka mānoanoa, emulsifier, a me ka stabilizer i nā ʻoihana like ʻole, me ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino. I ka ʻoihana kūkulu, hoʻohana ʻia ʻo HEC ma ke ʻano he mea hoʻohui i nā huahana ciment-based e hoʻomaikaʻi i ka hana, paʻa wai, a me ka ikaika paʻa.

ʻO ka Hydroxypropyl methyl cellulose (HPMC) he cellulose ether i hana ʻia e ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui hydroxypropyl a me methyl. Hiki ke ʻokoʻa ke degere o ka hoʻololi ʻana (DS) o HPMC mai ka 0.1 a i ka 0.5 no ka hoʻololi hydroxypropyl a me ka 1.2 a i ka 2.5 no ka hoʻololi ʻana i ka methyl, ma muli o ke noi. ʻO ke kaumaha o ka molekala o HPMC ka mea maʻamau ma waena o 10,000 a 1,000,000 Da.

He pauda keʻokeʻo ʻo HPMC a i ʻole keʻokeʻo, ʻala ʻole a ʻono ʻole i hiki ke hoʻoheheʻe ʻia i ka wai a me ka hapa nui o nā mea hoʻoheheʻe kūlohelohe. Hoʻohana maʻamau ia ma ke ʻano he mānoanoa, binder, a me emulsifier i nā ʻoihana like ʻole, me ke kūkulu ʻana, nā meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino. I ka ʻoihana kūkulu, hoʻohana ʻia ka HPMC ma ke ʻano he mea hoʻohui i nā huahana sima e hoʻomaikaʻi i ka hana, paʻa wai, a me ka ikaika pipili.

Nā mea hana o Cellulose Ethers ma waho:

Aia kekahi mau mea hana nui o ka cellulose ethers, me Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, a me Daicel Corporation.

ʻO Dow Chemical Company kekahi o nā mea hana nui o ka cellulose ethers, me HPMC, MC, a me EC. Hāʻawi ka hui i kahi ākea o nā māka a me nā kikoʻī no kēia mau huahana, e pili ana i ka noi. Hoʻohana ʻia nā cellulose ethers o Dow i nā ʻoihana like ʻole, me ke kūkulu ʻana, ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino.

ʻO Ashland Inc. kekahi mea hana nui o nā cellulose ethers, me HEC, HPMC, a me EC. Hāʻawi ka hui i kahi ākea ākea o nā māka a me nā kikoʻī no kēia mau huahana, e pili ana i ka noi. Hoʻohana ʻia nā cellulose ethers o Ashland i nā ʻoihana like ʻole, me ke kūkulu ʻana, ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino.

ʻO Shin-Etsu Chemical Co., Ltd. he hui kemika Kepani e hana ana i nā cellulose ethers, me HEC, HPMC, a me EC. Hāʻawi ka hui i kahi ākea o nā māka a me nā kikoʻī no kēia mau huahana, e pili ana i ka noi. Hoʻohana ʻia nā cellulose ethers a Shin-Etsu i nā ʻoihana like ʻole, e like me ke kūkulu ʻana, ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino.

ʻO AkzoNobel NV kahi hui multinational Dutch e hana ana i nā ether cellulose, me HEC, HPMC, a me MC. Hāʻawi ka hui i kahi ākea ākea o nā māka a me nā kikoʻī no kēia mau huahana, e pili ana i ka noi. Hoʻohana ʻia nā cellulose ethers o AkzoNobel i nā ʻoihana like ʻole, me ke kūkulu ʻana, ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino.

ʻO Daicel Corporation kahi hui kemika Kepani e hana ana i nā ether cellulose, me HPMC a me MC. Hāʻawi ka hui i kahi ākea o nā māka a me nā kikoʻī no kēia mau huahana, e pili ana i ka noi. Hoʻohana ʻia nā cellulose ethers a Daicel i nā ʻoihana like ʻole, me ke kūkulu ʻana, ka meaʻai, nā lāʻau lapaʻau, a me ka mālama pilikino.

Ka hopena:

ʻO nā cellulose ethers kahi papa o nā pūhui i loaʻa mai ka cellulose a hoʻohana nui ʻia i nā ʻoihana like ʻole. ʻO ka hana kemika o cellulose ethers e pili ana i ka hoʻololi ʻana o nā pūʻulu hydroxyl ma ke kaulahao cellulose me nā hui hana ʻē aʻe, e like me methyl, ethyl, hydroxyethyl, hydroxypropyl, a me carboxymethyl. Aia kekahi mau mea hana nui o ka cellulose ethers, me Dow Chemical Company, Ashland Inc., Shin-Etsu Chemical Co., Ltd., AkzoNobel NV, a me Daicel Corporation. Hāʻawi kēia mau hui i kahi ākea o nā māka a me nā kikoʻī no nā cellulose ethers, e pili ana i ka noi.