Carboxymethyl cellulose:
Ioniccellulose eterahana ʻia mai nā fiber maoli (ka pulupulu, a me nā mea ʻē aʻe) ma hope o ka mālama ʻana i ka alkali, me ka hoʻohana ʻana i ka sodium monochloroacetate ma ke ʻano he etherification agent, a ke hana nei i kahi ʻano o nā lāʻau lapaʻau. ʻO ke kiʻekiʻe o ka hoʻololi ʻana he 0.4 ~ 1.4, a ua hoʻopilikia nui ʻia kāna hana e ka pae o ka hoʻololi.
(1) ʻOi aku ka hygroscopic o Carboxymethyl cellulose, a ʻoi aku ka nui o ka wai ke mālama ʻia ma lalo o nā kūlana maʻamau.
(2) Carboxymethyl cellulose aqueous solution ʻaʻole ia e hana i ka gel, a emi ka viscosity me ka piʻi ʻana o ka mahana. Ke piʻi ka mahana ma mua o 50 ° C, ʻaʻole hiki ke hoʻohuli ʻia ka viscosity.
(3) Hoʻopilikia nui ʻia kona kūpaʻa e ka PH. ʻO ka mea maʻamau, hiki ke hoʻohana ʻia i ka mortar gypsum-based, akā ʻaʻole i ka mortar sima. Ke loaʻa ka alkaline, e nalowale ka viscosity.
(4) He haʻahaʻa loa kona paʻa wai ma mua o ka methyl cellulose. He hopena hoʻopaneʻe ia i ka mortar gypsum-based a hoʻemi i kona ikaika. Eia naʻe, ʻoi aku ka haʻahaʻa o ke kumukūʻai o ka carboxymethyl cellulose ma mua o ka methyl cellulose.
Cellulose alkyl ether:
ʻO ka methyl cellulose a me ka ethyl cellulose. I ka hana ʻenehana, hoʻohana maʻamau ka methyl chloride a i ʻole ethyl chloride ma ke ʻano he etherification agent, a penei ka hopena:
Ma ka papa kuhikuhi, hōʻike ʻo R iā CH3 a i ʻole C2H5. ʻAʻole pili wale ka neʻe ʻana o ka alkali i ke ʻano o ka etherification, akā pili pū kekahi i ka hoʻohana ʻana i nā alkyl halides. ʻO ka haʻahaʻa haʻahaʻa o ka alkali, ʻoi aku ka ikaika o ka hydrolysis o ka alkyl halide. I mea e hōʻemi ai i ka hoʻohana ʻana i ka etherifying agent, pono e hoʻonui ʻia ka ʻike alkali. Eia nō naʻe, ke kiʻekiʻe loa ka ʻike alkali, hoʻemi ʻia ka hopena pehu o ka cellulose, ʻaʻole kūpono i ka hopena etherification, a no laila e hoʻemi ʻia ke degere o ka etherification. No kēia kumu, hiki ke hoʻohui ʻia ka lye concentrated a i ʻole ka lye paʻa i ka wā o ka hopena. Pono ka mea hoʻoheheʻe i kahi mea hoʻonā maikaʻi a hoʻowaliwali i hiki ke puʻunaue like ʻia ka alkali.
Hoʻohana nui ʻia ʻo Methyl cellulose e like me ka mānoanoa, adhesive a me ka pale colloid etc. Hiki ke hoʻohana ʻia e like me ka dispersant no ka emulsion polymerization, kahi dispersant hoʻopaʻa no nā hua, kahi slurry textile, mea hoʻohui no ka meaʻai a me nā mea hoʻonaninani, kahi lāʻau lapaʻau lāʻau, a no ka latex pena, ka paʻi ʻana a me ka hoʻohana ʻana i ka hana ceramic. ikaika, etc.
Loaʻa i nā huahana Ethyl cellulose ka ikaika mechanical kiʻekiʻe, ka maʻalahi, ka pale wela a me ke kū anuanu. Hiki ke hoʻoheheʻe ʻia ka ethyl cellulose haʻahaʻa i loko o ka wai a hoʻoheheʻe ʻia i nā hopena alkaline, a hiki ke hoʻoheheʻe ʻia nā huahana kiʻekiʻe i loko o ka hapa nui o nā solvents organik. He kūpono maikaʻi me nā resins a me nā plasticizers. Hiki ke hoʻohana ʻia e hana i nā plastics, nā kiʻiʻoniʻoni, nā varnish, adhesives, latex a me nā mea uhi no nā lāʻau lapaʻau, etc.
ʻO ka hoʻokomo ʻana o nā pūʻulu hydroxyalkyl i loko o cellulose alkyl ethers hiki ke hoʻomaikaʻi i kona solubility, hoʻemi i kona naʻau i ka paʻakai ʻana, hoʻonui i ka mahana gelation a hoʻomaikaʻi i nā waiwai hoʻoheheʻe wela, a me nā mea ʻē aʻe.
Cellulose hydroxyalkyl ether:
ʻO nā mea i koho ʻia he hydroxyethyl cellulose a me hydroxypropyl cellulose. ʻO nā mea etherifying nā epoxide e like me ka ethylene oxide a me ka propylene oxide. E hoʻohana i ka ʻakika a i ʻole ka base e like me ka catalyst. ʻO ka hana ʻoihana e hana i ka cellulose alkali me ka etherification agent: hydroxyethyl cellulose me ka waiwai hoʻololi kiʻekiʻe e hiki ke hoʻoheheʻe ʻia i ka wai anuanu a me ka wai wela. ʻO ka hydroxypropyl cellulose me ka waiwai pani kiʻekiʻe e hiki ke hoʻoheheʻe wale ʻia i ka wai anuanu akā ʻaʻole i ka wai wela. Hiki ke hoʻohana ʻia ka Hydroxyethyl cellulose ma ke ʻano he mānoanoa no ka uhi ʻana i ka latex, ka paʻi textile a me ka hoʻoluʻu ʻana i nā pāpaʻi, nā mea nui pepa, nā mea hoʻopili a me nā colloids pale. Ua like ka hoʻohana ʻana o ka hydroxypropyl cellulose me ka hydroxyethyl cellulose. Hiki ke hoʻohana ʻia ʻo Hydroxypropyl cellulose me ka waiwai hoʻololi haʻahaʻa ma ke ʻano he lāʻau lapaʻau, hiki ke loaʻa nā waiwai paʻa a hoʻopau.
ʻO Carboxymethylcellulose, i hoʻopau ʻia e like meCMC, loaʻa ma ke ʻano o ka paʻakai sodium. ʻO ka mea etherifying he monochloroacetic acid, a penei ka hopena:
ʻO Carboxymethyl cellulose ka mea i hoʻohana nui ʻia i ka wai-soluble cellulose ether. I ka wā ma mua, ua hoʻohana nui ʻia e like me ka wili ʻana i ka lepo, akā i kēia manawa ua hoʻonui ʻia e hoʻohana ʻia e like me ka additive o ka detergent, ka lole slurry, ka pena latex, ka uhi ʻana o ka pahu pahu a me ka pepa, a me nā mea ʻē aʻe.
ʻO ka polyanionic cellulose (PAC) kahi ioniccellulose eteraa he huahana pani kiʻekiʻe no ka carboxymethyl cellulose (CMC). He keʻokeʻo, keʻokeʻo a i ʻole ka melemele liʻiliʻi a i ʻole granule, non-toxic, tasteless, maʻalahi hiki ke hoʻoheheʻe ʻia i ka wai, e hana ana i kahi hoʻonā māmā me kahi viscosity, ʻoi aku ka maikaʻi o ka wela a me ka paʻakai paʻakai, a me nā waiwai antibacterial ikaika. ʻAʻohe pulu a me ka pōʻino. Loaʻa iā ia nā hiʻohiʻona o ka maʻemaʻe kiʻekiʻe, kiʻekiʻe o ka hoʻololi ʻana, a me ka hāʻawi like ʻana o nā mea pani. Hiki ke hoʻohana ʻia e like me ka binder, thickener, rheology modifier, fluid loss reducer, suspension stabilizer, etc. Hoʻohana nui ʻia ka polyanionic cellulose (PAC) i nā ʻoihana āpau kahi hiki ke hoʻohana ʻia CMC, hiki ke hoʻemi nui i ka dosage, hoʻomaʻamaʻa i ka hoʻohana ʻana, hāʻawi i ka paʻa maikaʻi a hoʻokō i nā koi kaʻina kiʻekiʻe.
ʻO ka cyanoethyl cellulose ka hopena o ka cellulose a me ka acrylonitrile ma lalo o ka catalysis o ka alkali:
Loaʻa i ka cyanoethyl cellulose kahi dielectric kiʻekiʻe a me ka helu haʻahaʻa haʻahaʻa a hiki ke hoʻohana ʻia ma ke ʻano he resin matrix no nā kukui phosphor a me electroluminescent. Hiki ke hoʻohana ʻia ka cyanoethyl cellulose haʻahaʻa e like me ka pepa insulating no nā mea hoʻololi.
Ua hoʻomākaukau ʻia nā etera waiʻona momona kiʻekiʻe, nā alkenyl ethers, a me nā etera ʻona ʻala o cellulose, akā ʻaʻole i hoʻohana ʻia i ka hana.
Hiki ke hoʻokaʻawale ʻia nā ʻano hoʻomākaukau o ka cellulose ether i ke ʻano o ka wai, ke ʻano solvent, ke ʻano kneading, ke ʻano slurry, ke ʻano gas-solid, ke ʻano wai wai a me ka hui pū ʻana o nā ʻano i luna.
Ka manawa hoʻouna: Apr-28-2024