Pehea e hoʻomākaukau ai i ka cellulose ethers maʻemaʻe?

ʻO ka hana ʻana i nā eter cellulose maʻemaʻe e pili ana i kekahi mau ʻanuʻu, e hoʻomaka ana mai ka unuhi ʻana o cellulose mai nā mea kanu a hiki i ke kaʻina hana hoʻololi kemika.

ʻO ka Cellulose Sourcing: ʻO ka cellulose, he polysaccharide i loaʻa i loko o nā paia cellulose o nā mea kanu, lawelawe ma ke ʻano he mea maka no nā cellulose ethers. ʻO nā kumu maʻamau ka pulp lāʻau, ka pulupulu, a me nā mea kanu fibrous ʻē aʻe e like me jute a hemp.

Pulping: ʻO ka Pulping ke kaʻina o ka hoʻokaʻawale ʻana i nā fiber cellulose mai ka mea kanu. Loaʻa ʻia kēia ma o ka mīkini a i ʻole kemika. ʻO ka pulping mīkini e pili ana i ka wili ʻana a i ʻole ka hoʻomaʻemaʻe ʻana i ka mea e hoʻokaʻawale ai i nā fibers, ʻoiai ʻo ka pulping kemika, e like me ke kaʻina hana kraft, hoʻohana i nā kemika e like me ka sodium hydroxide a me ka sodium sulfide e hoʻopau i ka lignin a me ka hemicellulose, e waiho ana i ka cellulose ma hope.

Hoʻomaʻemaʻe (Kūpono): Inā makemake ʻia ka maʻemaʻe kiʻekiʻe, hiki i ka pulp cellulose ke hana i kahi kaʻina bleaching e wehe i nā lignin, hemicellulose, a me nā mea haumia ʻē aʻe. ʻO Chlorine dioxide, hydrogen peroxide, a i ʻole oxygen ka mea hoʻomaʻemaʻe maʻamau i hoʻohana ʻia i kēia kaʻina.

Hoʻoulu: Hoʻomākaukau maʻamau nā cellulose eter ma ka hoʻopili ʻana i ka cellulose me ka alkali metala hydroxides e hana i kahi waena cellulose alkali. ʻO kēia kaʻina e pili ana i ka pehu ʻana i nā fiber cellulose i loko o kahi hopena o ka sodium hydroxide a i ʻole potassium hydroxide ma kahi wela kiʻekiʻe. ʻO kēia kaʻina hana e hoʻoikaika i ka cellulose i ka etherification.

Etherification: ʻO ka Etherification ka hana nui i ka hana ʻana i nā ether cellulose. Hoʻokomo ʻia nā pūʻulu ether (e like me ka methyl, ethyl, hydroxyethyl, a i ʻole nā ​​hui hydroxypropyl) ma luna o ka iwi kuamoʻo cellulose. Hana ʻia kēia hopena ma ka mālama ʻana i ka cellulose alkali me nā mea etherifying e like me alkyl halides (eg, methyl chloride no methyl cellulose), alkylene oxides (eg, ethylene oxide no hydroxyethyl cellulose), a i ʻole alkyl halohydrins (eg, propylene oxide no hydroxypropyl cellulose. ) ma lalo o nā kūlana mālama ʻia o ka mahana, ke kaomi, a me ka pH.

Neutralization a me ka holoi ʻana: Ma hope o ka etherification, hoʻokaʻawale ʻia ka hui ʻana no ka wehe ʻana i ka alkali. Hana ʻia kēia ma ka hoʻohui ʻana i kahi waikawa, e like me ka waika hydrochloric a i ʻole sulfuric acid, e hoʻokaʻawale i ka alkali a e hoʻoheheʻe i ka cellulose ether. Holoi ʻia ka huahana me ka wai e wehe i nā koena kemika a me nā huahana.

Hoʻomaloʻo: Hoʻomaloʻo pinepine ʻia ka huahana cellulose ether i holoi ʻia no ka wehe ʻana i ka makū a loaʻa ke ʻano pauda hope loa. Hiki ke hana i kēia me ka hoʻohana ʻana i nā ʻenehana e like me ka hoʻomaloʻo ʻana i ka ea, ka hoʻomaloʻo maloʻo, a i ʻole ka maloʻo ʻana.

Ka Mana Mana: Pono nā ana hoʻomalu maikaʻi e hōʻoia i ka maʻemaʻe, kūlike, a me nā waiwai i makemake ʻia o nā cellulose ethers. Hoʻopili kēia i ka hoʻāʻo ʻana i ka huahana no nā ʻāpana e like me ke kiʻekiʻe o ka hoʻololi ʻana, ka viscosity, ka hāʻawi ʻana i ka nui o ka ʻāpana, ka mākū, a me ka maʻemaʻe me ka hoʻohana ʻana i nā ʻenehana analytical e like me ka titration, viscometry, a me spectroscopy.

Packaging and Storage: Ke hoʻomaloʻo ʻia nā cellulose ethers a hoʻāʻo ʻia ka maikaʻi, hoʻopili ʻia lākou i loko o nā pahu kūpono a mālama ʻia ma lalo o nā kūlana i hoʻopaʻa ʻia e pale ai i ka lawe ʻana a me ka hōʻino ʻana. ʻO ka lepili kūpono a me ka palapala o nā kikoʻī puʻupuʻu he mea nui no ka traceability a me ka hoʻokō hoʻoponopono.

Ma ka hahai ʻana i kēia mau ʻanuʻu, hiki ke hana i nā cellulose ethers maʻemaʻe me nā waiwai i makemake ʻia no nā noi ʻoihana like ʻole, me nā lāʻau lapaʻau, nā meaʻai, nā mea hoʻonaninani, nā textiles, a me nā mea hana.