生物质化学工程
生物質化學工程
생물질화학공정
BIOMASS CHEMICAL ENGINEERING
2014年
4期
18-22
,共5页
生漆%乳化%水基分散体系%性能
生漆%乳化%水基分散體繫%性能
생칠%유화%수기분산체계%성능
raw lacquer%emulsification%waterborne dispersion%property
采用复合乳化剂将天然生漆（RL）乳化成水包油型的稳定水基化生漆乳液（WRL），研究了乳化剂的种类、乳化剂的用量及不同乳化剂的配比对相反转过程及乳液稳定性的影响，并通过透射电子显微镜（TEM）与热重分析（TG）表征了水基化生漆乳液的粒径、粒子形貌及漆膜的耐热性能。研究结果表明，复合乳化剂聚氧乙烯辛基苯基醚（OP-10）/十二烷基硫酸钠（SDS）/聚乙烯醇（PVA）的乳化效果最好，最佳质量配比为7∶3∶10，乳化剂用量为生漆质量的10％时能够形成稳定的乳液，粒径较小（＜800 nm）且分布均匀；水基化生漆漆膜保持了天然生漆漆膜优良的机械性能、耐污染、耐化学介质及耐热性能，其铅笔硬度为4H，附着力为2级，柔韧性为0．5 mm，正冲的抗冲击强度由35 cm提高到50 cm，反冲的冲击强度由25 cm提高到50 cm，且成膜时间由4～5 d缩短到3 d。
採用複閤乳化劑將天然生漆（RL）乳化成水包油型的穩定水基化生漆乳液（WRL），研究瞭乳化劑的種類、乳化劑的用量及不同乳化劑的配比對相反轉過程及乳液穩定性的影響，併通過透射電子顯微鏡（TEM）與熱重分析（TG）錶徵瞭水基化生漆乳液的粒徑、粒子形貌及漆膜的耐熱性能。研究結果錶明，複閤乳化劑聚氧乙烯辛基苯基醚（OP-10）/十二烷基硫痠鈉（SDS）/聚乙烯醇（PVA）的乳化效果最好，最佳質量配比為7∶3∶10，乳化劑用量為生漆質量的10％時能夠形成穩定的乳液，粒徑較小（＜800 nm）且分佈均勻；水基化生漆漆膜保持瞭天然生漆漆膜優良的機械性能、耐汙染、耐化學介質及耐熱性能，其鉛筆硬度為4H，附著力為2級，柔韌性為0．5 mm，正遲的抗遲擊彊度由35 cm提高到50 cm，反遲的遲擊彊度由25 cm提高到50 cm，且成膜時間由4～5 d縮短到3 d。
채용복합유화제장천연생칠（RL）유화성수포유형적은정수기화생칠유액（WRL），연구료유화제적충류、유화제적용량급불동유화제적배비대상반전과정급유액은정성적영향，병통과투사전자현미경（TEM）여열중분석（TG）표정료수기화생칠유액적립경、입자형모급칠막적내열성능。연구결과표명，복합유화제취양을희신기분기미（OP-10）/십이완기류산납（SDS）/취을희순（PVA）적유화효과최호，최가질량배비위7∶3∶10，유화제용량위생칠질량적10％시능구형성은정적유액，립경교소（＜800 nm）차분포균균；수기화생칠칠막보지료천연생칠칠막우량적궤계성능、내오염、내화학개질급내열성능，기연필경도위4H，부착력위2급，유인성위0．5 mm，정충적항충격강도유35 cm제고도50 cm，반충적충격강도유25 cm제고도50 cm，차성막시간유4～5 d축단도3 d。
Waterborne dispersion of raw lacquer(WRL)was prepared by composite emulsifier.The effects of types and the content of emulsifier,as well as the ratio of different emulsifiers on the stability of emulsion and phase inversion were investigated.The particle size,morphology and mechanical properties of the WRL film were examined by TEM and TG.It was shown that the emulsification could be improved by using composite emulsifier of OP-10/SDS/PVA and the optimum mass proportion was 7∶3∶10.The dispersion had a good stability,and its particle size was not more than 800 nm when the dosage of composite emulsifier reached 10 % of raw lacquer by weight.The film of WRL had excellent mechanical properties,thermal-stability and resistance to chemicals and pollution.It was similar to raw lacquer.Pencil hardness,adhesion and flexibility were 4H,2 grade and 0.5 mm,respectively.The square impact strength of the films was increased from 35 cm to 50 cm and the reverse impact strength was increased from 25 cm to 50 cm.The formation time was shortened form 4-5 to 3 days.
